Lexus RX350h (2024 year). Manual in english

474

6-3. Do-it-yourself maintenance

If any washer does not work or the
warning message appears on the
multi-information display, the washer
tank may be empty. Add washer fluid.



RX500h



RX350h

WARNING

■

When filling the reservoir

Take care as brake fluid can harm your

hands and eyes and damage painted sur-

faces.

If fluid gets on your hands or in your eyes,

flush the affected area with clean water

immediately.

If you still experience discomfort, see a

doctor.

NOTICE

■

If the fluid level is low or high

It is normal for the brake fluid level to go

down slightly as the brake pads wear out

or when the fluid level in the accumulator

is high.

If the reservoir needs frequent refilling,

there may be a serious problem.

Washer fluid

WARNING

■

When adding washer fluid

Do not add washer fluid when the hybrid

system is hot or operating as washer fluid

contains alcohol and may catch fire if

spilled on the engine, etc.

NOTICE

■

Do not use any fluid other than

washer fluid

Do not use soapy water or engine anti-

freeze instead of washer fluid.

Doing so may cause streaking on the

vehicle’s painted surfaces, as well as

damaging the pump leading to problems

of the washer fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as neces-

sary.

Refer to the freezing temperatures listed

on the label of the washer fluid bottle.

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6-3. Do-it-yourself maintenance

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The 12-volt battery is located in the
right-hand side of luggage compart-
ment.

■

Before recharging

When recharging, the 12-volt battery pro-

duces hydrogen gas which is flammable

and explosive. Therefore, observe the fol-

lowing precautions before recharging:

●

If recharging with the 12-volt battery

installed on the vehicle, be sure to discon-

nect the ground cable.

●

Make sure the power switch on the char-

ger is off when connecting and discon-

necting the charger cables to the 12-volt

battery.

■

After recharging/reconnecting the

12-volt battery

●

Unlocking the doors using the smart

access system with push-button start may

not be possible immediately after recon-

necting the 12-volt battery. If this hap-

pens, use the wireless remote control or

the mechanical key to lock/unlock the

doors.

●

Start the hybrid system with the power

switch in ACC. The hybrid system may

not start with the power switch turned off.

However, the hybrid system will operate

normally from the second attempt.

●

The power switch mode is recorded by

the vehicle. If the 12-volt battery is dis-

connected and reconnected, the vehicle

will return the power switch mode to the

status it was in before the 12-volt battery

was disconnected. Make sure to turn off

the power switch before disconnecting

the 12-volt battery. Take extra care when

connecting the 12-volt battery if the

power switch mode prior to the 12-volt

battery being disconnected is unknown.

If the system will not start even after multiple

attempts at all the methods above, contact

your Lexus dealer.

12-volt battery

Location

WARNING

■

Chemicals in the 12-volt battery

The 12-volt battery contains poisonous

and corrosive sulfuric acid and may pro-

duce hydrogen gas which is flammable

and explosive. To reduce the risk of death

or serious injury, take the following pre-

cautions while working on or near the

12-volt battery:

●

Do not cause sparks by touching the

12-volt battery terminals with tools.

●

Do not smoke or light a match near the

12-volt battery.

●

Avoid contact with eyes, skin and

clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when

working near the 12-volt battery.

●

Keep children away from the 12-volt

battery.

■

Where to safely charge the 12-volt

battery

Always charge the 12-volt battery in an

open area. Do not charge the 12-volt bat-

tery in a garage or closed room where

there is insufficient ventilation.

■

How to recharge the 12-volt battery

Only perform a slow charge (5 A or

less). The 12-volt battery may explode if

charged at a quicker rate.

476

6-3. Do-it-yourself maintenance

Open the deck board. (



P.425)

Remove the 12-volt battery cover.

Make sure that the 12-volt battery ter-
minals are not corroded and that there
are no loose connections, cracks, or
loose clamps.

Terminals
Hold-down clamp

WARNING

■

Emergency measures regarding

electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean water for at

least 15 minutes and get immediate

medical attention. If possible, continue

to apply water with a sponge or cloth

while traveling to the nearest medical

facility.

●

If electrolyte gets on your skin

Wash the affected area thoroughly. If

you feel pain or burning, get medical

attention immediately.

●

If electrolyte gets on your clothes

It can soak through clothing on to your

skin. Immediately take off the clothing

and follow the procedure above if nec-

essary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk.

Get emergency medical attention

immediately.

■

When replacing the 12-volt battery

Use a 12-volt battery designed for this

vehicle. Failure to do so may cause gas

(hydrogen) to enter the passenger com-

partment, causing a fire or explosion.

For replacement of the 12-volt battery,

contact your Lexus dealer.

■

When handling the 12-volt battery



P.554

NOTICE

■

When recharging the 12-volt battery

Never recharge the 12-volt battery while

the hybrid system is operating. Also, be

sure all accessories are turned off.

Removing the 12-volt battery
cover

Exterior

A
B

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6-3. Do-it-yourself maintenance

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Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as excessive
wear on one side of the tread.
Check the spare tire condition and
pressure if not rotated.

New tread
Worn tread
Treadwear indicator

The location of treadwear indicators is
shown by a “TWI” or “

” mark, etc.,

molded into the sidewall of each tire.
Replace the tires if the treadwear indica-
tors are showing on a tire.

■

When to replace your vehicle’s tires

Tires should be replaced if:

●

The treadwear indicators are showing on

a tire.

●

You have tire damage such as cuts, splits,

cracks deep enough to expose the fabric,

and bulges indicating internal damage.

●

A tire goes flat repeatedly or cannot be

properly repaired due to the size or loca-

tion of a cut or other damage.

If you are not sure, consult with your Lexus

dealer.

■

Tire life

Any tire over 6 years old must be checked

by a qualified technician even if it has sel-

dom or never been used or damage is not

obvious.

■

Maximum load of tire

Check that the number given by dividing

the maximum load by 1.10 of the replace-

ment tire is greater than 1/2 of the Gross

Axle Weight Ratings (GAWR) of either the

front axle or the rear axle, whichever is

greater.
For the GAWR, see the Certification Label.

For the maximum load of the tire, see the

load limit at maximum cold tire inflation

pressure mentioned on the sidewall of the

tire. (



P.576)

■

Tire types

●

Summer tires

Summer tires are high-speed performance
tires best suited to highway driving under
dry conditions. Since summer tires do not
have the same traction performance as
snow tires, summer tires are inadequate for
driving on snow-covered or icy roads. For

Tires

Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.

Checking tires

A
B
C

478

6-3. Do-it-yourself maintenance

driving on snow-covered roads or icy
roads, the use of snow tires is recom-
mended. When installing snow tires, be
sure to replace all four tires.

●

All season tires

All season tires are designed to provide
better traction in snow and to be adequate
for driving in most winter conditions as well
as for use year-round. All season tires,
however, do not have adequate traction
performance compared with snow tires in
heavy or loose snow. Also, all season tires
fall short in acceleration and handling per-
formance compared with summer tires in
highway driving.

●

Snow tires

For driving on snow-covered roads or icy
roads, we recommend using snow tires. If
you need snow tires, select tires of the
same size, construction and load capacity
as the originally installed tires. Since your
vehicle has radial tires as original equip-
ment, make sure your snow tires also have
radial construction. Do not install studded
tires without first checking local regula-
tions for possible restrictions. Snow tires
should be installed on all wheels.
(



P.394)

■

If the tread on snow tires wears down

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is

lost.

Rotate the tires in the order shown.

WARNING

■

When inspecting or replacing tires

Observe the following precautions to

prevent accidents.

Failure to do so may cause damage to

parts of the drive train as well as danger-

ous handling characteristics, which may

lead to an accident resulting in death or

serious injury.

●

Do not mix tires of different makes,

models or tread patterns.

Also, do not mix tires of remarkably

different treadwear.

●

Do not use tire sizes other than those

recommended by Lexus.

●

Do not mix differently constructed

tires (radial, bias-belted or bias-ply

tires).

●

Do not mix summer, all season and

snow tires.

●

Do not use tires that have been used

on another vehicle.

Do not use tires if you do not know

how they were used previously.

●

Do not tow if your vehicle has a spare

tire installed.

NOTICE

■

Driving on rough roads

Take particular care when driving on

roads with loose surfaces or potholes.

These conditions may cause losses in tire

inflation pressure, reducing the cushion-

ing ability of the tires. In addition, driving

on rough roads may cause damage to

the tires themselves, as well as the vehi-

cle’s wheels and body.

■

If tire inflation pressure of each tire

becomes low while driving

Do not continue driving, or your tires

and/or wheels may be ruined.

Tire rotation

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6-3. Do-it-yourself maintenance

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To equalize tire wear and extend tire life,
Lexus recommends that tire rotation is car-
ried out at the same interval as tire inspec-
tion.
Make sure to perform wheel position reg-
istration procedure after rotating the tires.
(



P.481)

Your vehicle is equipped with a tire
pressure warning system that uses tire
pressure warning valves and transmit-
ters to detect low tire inflation pressure
before serious problems arise.
The tire pressure warning system of
this vehicle adopts a 2-type warning
system. (



P.514)



Multi-information display (vehicles
without a head-up display)



Multi-information display (vehicles
with a head-up display)



Center display



When “Adjust Pressure” is dis-
played on the multi-information dis-
play (Normal Warning)

A warning with the tire pressure warning
light and warning buzzer when there is an
unknown level of low tire pressure with the
appearance of the tire due to natural air
leakage as well as the pressure lowering
due to changes in the pressure according
to the outside temperature.



When “Immediately Check tire
when Safe” is displayed on the
multi-information display (Emer-
gency Warning)

A warning with the tire pressure warning
light and warning buzzer when there is a
known level of low tire pressure with the
appearance of the tire due to pressure sud-
denly lowering.
However, the system may not be able to

Tire pressure warning system

480

6-3. Do-it-yourself maintenance

detect sudden tire ruptures (bursting, etc.).



The tire pressure detected by the
tire pressure warning system can be
displayed on the center display.
(



P.102)

■

Routine tire inflation pressure checks

The tire pressure warning system does not

replace routine tire inflation pressure

checks. Make sure to check tire inflation

pressure as part of your routine of daily

vehicle checks.

■

Tire inflation pressure

●

It may take a few minutes to display the

tire inflation pressure after the power

switch is turned to ON. It may also take a

few minutes to display the tire inflation

pressure after inflation pressure has been

adjusted.

●

Tire inflation pressure changes with tem-

perature. The displayed values may also

be different from the values measured

using a tire pressure gauge.

■

Situations in which the tire pressure

warning system may not operate prop-

erly

●

In the following cases, the tire pressure

warning system may not operate prop-

erly.

• If non-genuine Lexus wheels are used.

• A tire has been replaced with a tire that is

not an OE (Original Equipment) tire.

• A tire has been replaced with a tire that is

not of the specified size.

• Tire chains, etc. are equipped.

• If a window tint that affects the radio wave

signals is installed.

• If there is a lot of snow or ice on the vehi-

cle, particularly around the wheels or

wheel housings.

• If the tire inflation pressure is extremely

higher than the specified level.

• If tires not equipped with tire pressure

warning valves and transmitters are used.

• If the ID code on the tire pressure warn-

ing valves and transmitters is not regis-

tered in the tire pressure warning

computer.

●

Performance may be affected in the fol-

lowing situations.

• Near a TV tower, electric power plant,

gas station, radio station, large display,

airport or other facility that generates

strong radio waves or electrical noise

• When carrying a portable radio, cellular

phone, cordless phone or other wireless

communication device

●

If tire position information is not correctly

displayed due to the radio wave condi-

tions, the display may be corrected by

changing the location of the vehicle as

the radio wave conditions may change.

●

When the vehicle is parked, the time

taken for the warning to start or go off

could be extended.

●

When tire inflation pressure declines rap-

idly for example when a tire has burst, the

warning may not operate.

When replacing tires or wheels, tire
pressure warning valves and transmit-
ters must also be installed.
When new tire pressure warning
valves and transmitters are installed,
new ID codes must be registered in the
tire pressure warning computer.
(



P.484)

■

Replacing tires and wheels

If the ID code of the tire pressure warning

valve and transmitter is not registered, the

tire pressure warning system will not work

properly. In this case, after driving for about

20 minutes, the tire pressure warning light

blinks for 1 minute and stays on to indicate a

system malfunction.

Installing tire pressure warning
valves and transmitters

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6-3. Do-it-yourself maintenance

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■

When to register the position of
each wheel

It is necessary to register the position
of each wheel after performing a tire
rotation.
Wheel position registration can be
performed by oneself. Wheel position
registration is performed by driving
forward with moderate left and right
turns. However, depending on the driv-
ing conditions and driving environ-
ment, registration may take some time
to complete.

■

Registering the position of each
wheel

Park the vehicle in a safe place, turn
the power switch off and wait 15
minutes or more.

Start the hybrid system.

The wheel position registration procedure

cannot be performed while the vehicle is

moving.

Select

on the center display.

Select “Vehicle customize”.

Select “Tire pressure”.

Select “Tire rotation”.

Select “Continue”.

A message indicating that wheel position

registration is being performed will be dis-

played on the multi-information display.

“---” will be displayed for the tire inflation

pressure of each tire and wheel position

registration will begin.

Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes.

When wheel position registration is com-

plete, a message indicating that registra-

tion has been completed and the inflation

pressure of each tire will be displayed on

the multi-information display.
Even if it is not possible to drive continu-

ously at approximately 25 mph (40 km/h)

or more, registration can be completed by

driving for a long time. However, if registra-

tion does not complete after driving for 1

hour or more, park the vehicle in a safe

place and leave it with the power switch in

ON for approximately 15 minutes or more,

and then perform the driving procedure

again.

■

When performing wheel position regis-

tration

●

Normally, wheel position registration can

be completed within approximately 30

minutes.

●

Wheel position registration is performed

while driving at a vehicle speed of

approximately 25 mph (40 km/h) or

more.

■

Wheel position registration procedure

●

If the power switch is turned off while reg-

NOTICE

■

Repairing or replacing tires, wheels,

tire pressure warning valves, trans-

mitters and tire valve caps

●

When removing or fitting the wheels,

tires or the tire pressure warning

valves and transmitters, contact your

Lexus dealer as the tire pressure warn-

ing valves and transmitters may be

damaged if not handled correctly.

●

Make sure to install the tire valve caps.

If the tire valve caps are not installed,

water could enter the tire pressure

warning valves, corrode the valve, and

cause sticking and air leaks.

●

When replacing tire valve caps, do not

use tire valve caps other than those

specified. The cap may become stuck.

Registering the position of each
wheel

482

6-3. Do-it-yourself maintenance

istering the wheel position, the next time

the power switch is turned to ON, the

wheel position registration will resume

and it will not be necessary to restart the

procedure.

●

While the position of each wheel is being

determined and the inflation pressures

are not being displayed, if the inflation

pressure of a tire drops, the tire pressure

warning light will come on.

■

If the wheel position cannot be regis-

tered easily

●

In the following situations, wheel position

registration may take longer than usual to

be completed or may not be possible.

• Vehicle is not driven at approximately 25

mph (40 km/h) or more

• Vehicle is driven on unpaved roads

●

If wheel position registration does not

complete after driving for 1 hour or more,

park the vehicle in a safe place for

approximately 15 minutes and then drive

the vehicle again.

●

If the vehicle is reversed during wheel

position registration, all data collected

until then will be cleared. Perform driving

again.

■

When you need to setting the tire
pressure

In the following situations, it will be nec-
essary to perform the tire inflation
pressure setting procedure of the tire
pressure warning system.



When the specified tire inflation
pressure has changed, such as due
to carried load, etc.



When the tire inflation pressure is
changed such as when the tire size
is changed.

If the tire inflation pressure has been
adjusted to the specified level, perform

the tire inflation setting procedure by
selecting specified inflation pressure
on the center display. (



P.482)

When the tire inflation pressure is to be
other than specified, such as when tires
other than the specified size are used,
etc., set the tire inflation pressure using
the current pressure. Make sure to
adjust the tire inflation pressure of each
tire to the appropriate level before per-
forming tire pressure setting. The tire
pressure warning system operates
based on this tire inflation pressure.
(



P.483)

■

Setting by selecting a specified tire
inflation pressure

Start the hybrid system.

The tire inflation pressure cannot be set

while the vehicle is moving.

Select

on the center display.

Select “Vehicle customize”.

Select “Tire pressure”.

Select “Set indicated air pressure”
and then select the desired front
and rear tire pressures.

Select “OK”.

The tire pressure warning light will slowly

blink 3 times.
After setting the tire inflation pressure, a

message indicating that setting has been

completed will be displayed on the

Setting the tire pressure

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6-3. Do-it-yourself maintenance

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multi-information display.

■

Setting using the current tire infla-
tion pressure

Adjust the tire inflation pressure of
each tire to the appropriate level.

Make sure to adjust the tire inflation pres-

sure with the tires cold.

Start the hybrid system.

The tire inflation pressure cannot be set

while the vehicle is moving.

Select

on the center display.

Select “Vehicle customize”.

Select “Tire pressure”.

Select “Set current air pressure”.

Select “Continue”.

The tire pressure warning light will slowly

blink 3 times and a message indicating that

tire inflation pressure is being set will be

displayed on the multi-information display.
After setting the tire inflation pressure, a

message indicating that setting has been

completed will be displayed on the

multi-information display.

■

Warning performance of the tire pres-

sure warning system (Setting using the

current tire inflation pressure)

●

When performing the tire pressure set-

ting using the current tire inflation pres-

sure, the warning timing of the tire

pressure warning system will vary

according to the conditions under which

tire pressure setting was performed.

Therefore, a warning may be output even

if the tire inflation pressure drops slightly

or if the tire inflation pressure increases

above that when the tire inflation pres-

sure was set.

●

Make sure to perform the tire pressure

setting procedure after adjusting the tire

inflation pressure. Also, make sure the

tires are cold before performing the tire

pressure setting procedure or adjusting

the tire inflation pressure.

■

Tire inflation pressure setting proce-

dure (Setting using the current tire infla-

tion pressure)

●

If the power switch is turned off while set-

ting the tire inflation pressure, the next

time the power switch is turned to ON,

the setting procedure will resume and it

will not be necessary to restart the proce-

dure.

●

If the tire inflation pressure setting proce-

dure is started unnecessarily, adjust the

tire inflation pressure to the specified

level with the tires cold and then perform

setting by selecting a specified tire infla-

tion pressure, or perform the tire inflation

pressure setting procedure with the cur-

rent tire inflation pressure.

■

If the tire inflation pressure cannot be

set easily

●

Normally, it takes approximately 3 min-

utes to complete the setting procedure to

the current tire inflation pressure.

●

If the tire pressure warning light does not

blink 3 times when starting the tire infla-

tion pressure setting procedure, the pro-

cedure may not have started. Perform the

procedure again from the beginning.

●

If tire inflation pressure setting procedure

cannot be completed after performing

484

6-3. Do-it-yourself maintenance

the above procedure, contact your Lexus

dealer.

■

When to register ID codes

The tire pressure warning valve and
transmitter is equipped with a unique
ID code. When new tire pressure
warning valves and transmitters are
installed, new ID codes must be regis-
tered in the tire pressure warning com-
puter.

■

How to registration ID code

Before performing ID code registra-
tion, make sure that no wheels with tire
pressure warning valve and transmit-
ters installed are near the vehicle.

Park the vehicle in a safe place, turn
the power switch off and wait 15
minutes or more.

Start the hybrid system.

The ID code registration procedure cannot

be performed while the vehicle is moving.

Select

on the center display.

Select “Vehicle customize”.

Select “Tire pressure”.

Check if the desired wheel set (“Set
1” or “Set 2”) is displayed.

ID codes will be registered to the displayed

wheel set.

To change the wheel set to be registered,

select the displayed set, and then select the

wheel set you wish to register.
If ID codes have already been registered

for that wheel set, the tire pressure warning

light will slowly blink 3 times, and a mes-

sage indicating that change is occurring

will be displayed on the multi-information

display.

Select “New tire registration”.

Select “Continue”.

The tire pressure warning light will slowly

blink 3 times and a message indicating that

ID code registration is being performed

will be displayed on the multi-information

display. Wheel set changing will be can-

celed and registration will begin.
When registration is being performed, the

tire pressure warning light will blink for

approximately 1 minute then illuminate and

“---” will be displayed for the inflation pres-

sure of each tire on the multi-information

display.

WARNING

■

When setting using the current tire

inflation pressure

Make sure to adjust the tire inflation

pressure of each tire to the appropriate

level before performing tire pressure set-

ting. Otherwise, the tire pressure warn-

ing light may not illuminate even if the tire

inflation pressure drops or may illuminate

even though the tire inflation pressure is

normal.

Registering ID codes

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Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes.

When registration is complete, the tire

pressure warning light will turn off and a

message indicating that registration has

been completed will be displayed on the

multi-information display.
Registration may take longer than normal

to complete if the vehicle speed cannot be

maintained at approximately 25 mph (40

km/h) or more. If registration cannot be

completed after driving for 1 hour or more,

perform the registration procedure again

from the beginning.

If the tire inflation pressure of the
wheel set installed differs from that
of the previous set, it will be neces-
sary to perform the tire inflation
pressure setting procedure of the
tire pressure warning system.
(



P.482)

If the specified tire inflation pressure is the

same, it will not be necessary to perform

the tire inflation pressure setting proce-

dure.

■

When registering ID codes

●

Normally, wheel position registration can

be completed within approximately 30

minutes.

●

ID code registration is performed while

driving at a vehicle speed of approxi-

mately 25 mph (40 km/h) or more.

●

ID codes can be registered by yourself,

but depending on the driving conditions

and driving environment, registration

may take some time to complete.

●

When using a wheel set which all of the

ID codes have already been registered,

the wheel set can be changed in a short

amount of time. (



P.485)

■

If ID codes are not registered easily

●

In the following situations, ID code regis-

tration may take longer than usual to be

completed or may not be possible.

• When the vehicle has not been parked

for approximately 15 minutes or more

before being driven

• Vehicle is not driven at approximately 25

mph (40 km/h) or more

• Vehicle is driven on unpaved roads

• Vehicle is driven near other vehicles and

system cannot recognize tire pressure

warning valve and transmitters of your

vehicle over those of other vehicles

• Wheel with tire pressure warning valve

and transmitter installed is inside or near

the vehicle

●

If the vehicle is reversed during registra-

tion, all data collected until then will be

cleared. Perform driving again.

●

If registration does not complete after

driving for 1 hour or more, perform the ID

code registration procedure again from

the beginning.

●

If the tire pressure warning light does not

blink 3 times when starting ID code reg-

istration procedure, the procedure may

not have started. Perform the procedure

again from the beginning.

●

If the ID codes cannot be registered even

when performing the above procedure,

contact your Lexus dealer.

To cancel ID code registration after it
has been started, select “New tire reg-
istration” again on the center display.

If ID code registration has been canceled,
the tire pressure warning light will turn off.
If the warning light does not turn off, ID
code registration may not have been can-
celled correctly. To cancel registration,
select “New tire registration” again on the
center display.

Your vehicle is equipped with a tire
pressure warning system with a func-

Canceling ID code registration

Selecting wheel set

486

6-3. Do-it-yourself maintenance

tion to register two sets of ID codes.
This allows for registration of a second
wheel set, for example a winter set.



The wheel set can be changed only
if a second wheel set has been regis-
tered to the system. If a second
wheel set has not been registered,
“Set 2 (Unregistered)” will be dis-
played and it will not be possible to
change to the selected wheel set.

ID codes can be registered by yourself.
(



P.484)



Only a change between both regis-
tered wheel set is possible, mixing
between these wheel sets is not sup-
ported.



While registering ID codes, it may
not be possible to change between
wheel sets normally. Cancel regis-
tration before changing between
wheel sets.

■

Changing ID codes between dif-
ferent wheel sets

Install the desired wheel set.

Select

on the center display.

Select “Vehicle customize”.

Select “Tire pressure”.

Select the wheel set (“Set 1” or “Set
2”) displayed for the set selection
setting.

Select the wheel set you wish to
register, and then select “OK”.

The tire pressure warning light will slowly

blink 3 times, a message indicating that

change is occurring will be displayed, and

the wheel set change will begin.
Wheel set change will begin and the tire

pressure warning light will blink for 1 min-

ute and then illuminate. Also, while the

change is being performed, “---” will be

displayed for the tire inflation pressure of

each tire on the multi-information display.
After approximately 2 minutes, the wheel

set change will complete, the tire pressure

warning light will turn off, and a completion

message will be displayed on the

multi-information display.
If changing does not complete after

approximately 4 minutes, a message indi-

cating that the change could not be com-

pleted will be displayed.

Check which wheel set is installed and per-

form the change procedure again from the

beginning.

If the specified tire inflation pres-
sure of the wheel set installed dif-
fers from that of the previous set, it
will be necessary to perform the
tire inflation pressure setting proce-
dure of the tire pressure warning
system. (



P.482)

If the specified tire inflation pressure is the

same, it will not be necessary to perform

the tire inflation pressure setting proce-

dure.



P.481)

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The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
(



P.570)

Tire valve
Tire pressure gauge

Remove the tire valve cap.

Press the tip of the tire pressure
gauge onto the tire valve.

Read the pressure using the gauge
gradations.

If the tire inflation pressure is not at
the recommended level, adjust the
pressure.
If you add too much air, press the
center of the valve to deflate.

After completing the tire inflation
pressure measurement and adjust-
ment, apply soapy water to the
valve and check for leakage.

Put the tire valve cap back on.

■

Tire inflation pressure check interval

You should check tire inflation pressure

every two weeks, or at least once a month.

Do not forget to check the spare.

■

Effects of incorrect tire inflation pres-

sure

Driving with incorrect tire inflation pressure

may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor han-

dling

●

Reduced tire life due to wear

●

Reduced safety

●

Damage to the drive train

If a tire needs frequent inflating, have it

checked by your Lexus dealer.

■

Instructions for checking tire inflation

pressure

When checking tire inflation pressure,

observe the following:

●

Check only when the tires are cold.

If your vehicle has been parked for at

least 3 hours or has not been driven for

more than 1 mile or 1.5 km, you will get an

accurate cold tire inflation pressure read-

Tire inflation pressure

Checking the specified tire infla-
tion pressure

Inspection and adjustment pro-
cedure

A
B

488

6-3. Do-it-yourself maintenance

ing.

●

Always use a tire pressure gauge.

It is difficult to judge if a tire is properly

inflated based only on its appearance.

●

It is normal for the tire inflation pressure

to be higher after driving as heat is gen-

erated in the tire. Do not reduce tire infla-

tion pressure after driving.

●

Never exceed the vehicle capacity

weight.

Passengers and luggage weight should

be placed so that the vehicle is balanced.

WARNING

■

Proper inflation is critical to save tire

performance

Keep your tires properly inflated.

If the tires are not properly inflated, the

following conditions may occur which

could lead to an accident resulting in

death or serious injury:

●

Excessive wear

●

Uneven wear

●

Poor handling

●

Possibility of blowouts resulting from

overheated tires

●

Air leaking from between tire and

wheel

●

Wheel deformation and/or tire dam-

age

●

Greater possibility of tire damage

while driving (due to road hazards,

expansion joints, sharp edges in the

road, etc.)

NOTICE

■

When inspecting and adjusting tire

inflation pressure

Be sure to put the tire valve caps back on.

If a valve cap is not installed, dirt or mois-

ture may get into the valve and cause an

air leak, resulting in decreased tire infla-

tion pressure.

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When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, diameter, rim width and inset

Replacement wheels are available at
your Lexus dealer.

: Conventionally referred to as offset.

Lexus does not recommend using the
following:



Wheels of different sizes or types



Used wheels



Bent wheels that have been straight-
ened

■

When replacing wheels

The wheels of your vehicle are equipped

with tire pressure warning valves and trans-

mitters that allow the tire pressure warning

system to provide advance warning in the

event of a loss in tire inflation pressure.

Whenever wheels are replaced, tire pres-

sure warning valves and transmitters must

be installed. (



P.480)

Wheels

If a wheel is bent, cracked or heavily
corroded, it should be replaced.
Otherwise, the tire may separate
from the wheel or cause a loss of
handling control.

Wheel selection

WARNING

■

When replacing wheels

●

Do not use wheels that are a different

size from those recommended in the

Owner’s Manual, as this may result in a

loss of handling control.

●

Never use an inner tube in a leaking

wheel which is designed for a tubeless

tire.

Doing so may result in an accident,

causing death or serious injury.

●

Use the correct wheel bolts for the

wheels to be installed. For details, con-

tact your Lexus dealer.

■

Wheel bolts

Observe the following precautions to

reduce the risk of death or serious injury:

●

Do not over tighten.

●

Never use oil or grease on the wheel

bolts. Oil and grease may cause the

wheel bolts to be excessively tight-

ened, leading to bolt or disc wheel

damage. In addition, the oil or grease

can cause the wheel bolts to loosen

and the wheel may fall off, causing a

serious accident. Remove any oil or

grease from the wheel bolts.

●

If there are any cracks or deformations

in the wheel bolts, or if the surface

treatment becomes worn, have the

wheel bolts replaced at your Lexus

dealer. Failure to follow these precau-

tions could cause the wheel bolts to

loosen and the tire to fall off, resulting

in death or serious injury.

■

Use of defective wheels prohibited

Do not use cracked or deformed wheels.

Doing so could cause the tire to leak air

during driving, possibly causing an acci-

dent.

490

6-3. Do-it-yourself maintenance



Use only Lexus wheel bolts and
wrenches designed for use with
your aluminum wheels.



When rotating, repairing or chang-
ing your tires, check that the wheel
bolts are still tight after driving 621
miles (1000 km).



Be careful not to damage the alumi-
num wheels when using tire chains.



Use only Lexus genuine balance
weights or equivalent and a plastic
or rubber hammer when balancing
your wheels.

Turn the power switch off.

Open the glove box. Slide off the
damper.

Push in the glove box on the vehi-
cle’s outer side to disconnect the
claws. Then pull out the glove box
and disconnect the lower claws.

NOTICE

■

Replacing tire pressure warning

valves and transmitters

●

Because tire repair or replacement

may affect the tire pressure warning

valves and transmitters, make sure to

have tires serviced by your Lexus

dealer or other qualified service shop.

In addition, make sure to purchase

your tire pressure warning valves and

transmitters at your Lexus dealer.

●

Ensure that only genuine Lexus wheels

are used on your vehicle.

Tire pressure warning valves and trans-

mitters may not work properly with

non-genuine wheels.

Aluminum wheel precautions

Air conditioning filter

The air conditioning filter must be
changed regularly to maintain air
conditioning efficiency.

Removing the air conditioning
filter

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Unlock the filter cover ( ), pull the
filter cover out of the claws ( ),
and remove the filter cover.

Remove the filter case.

There may be foreign objects on top of the

air conditioning filter.

Remove the air conditioning filter
from the filter case and replace it
with a new one.

The “

UP” marks shown on the filter

and the filter case should be pointing up.

■

Checking interval

Inspect and replace the air conditioning fil-

ter according to the maintenance schedule.

In dusty areas or areas with heavy traffic

flow, early replacement may be required.

(For scheduled maintenance information,

please refer to the “Owner’s Manual Sup-

plement” or “Scheduled Maintenance”.)

■

If air flow from the vents decreases dra-

matically

The filter may be clogged. Check the filter

and replace if necessary.

■

Air conditioning filter with deodorizing

function

When fragrances are placed in your vehi-

cle, the deodorizing effect may become

significantly weakened in a short period.

When an air conditioning odor comes out

continuously, replace the air conditioning

filter.

NOTICE

■

When using the air conditioning sys-

tem

Make sure that a filter is always installed.

Using the air conditioning system without

a filter may cause damage to the system.

■

To prevent damage to the filter cover

When moving the filter cover in the

direction of arrow to release the fitting,

pay attention not to apply excessive force

to the claws. Otherwise, the claws may

be damaged.

492

6-3. Do-it-yourself maintenance

■

Scheduled maintenance of the air

intake vent is necessary when

In some situations such as when the vehicle

is used frequently or in heavy traffic or dusty

areas, the air intake vent may need to be

cleaned more regularly. For details, refer to

the “Warranty and Service Guide”,

“Owner’s Manual Supplement” or “Sched-

uled Maintenance”.

■

Cleaning the air intake vent

Improper handling of the air intake vent

cover and filter may result in damage to

them. If you have any concerns about clean-

ing the filter, contact your Lexus dealer.

Turn the power switch off.

Using a Phillips screwdriver,
remove the clip.

Remove the air intake vent cover.

Pull the cover as shown in the illus-
tration to disengage the 6 claws,
starting from the claw in the upper
right corner.
Pull the cover toward the front of
the vehicle to remove it.

Remove the filter from the air intake
vent cover.

If dust has accumulated on the air intake

vent cover, remove the dust with a vacuum

Cleaning the hybrid battery
(traction battery) air intake
vents

To prevent the fuel economy from
being affected, visually inspect the
hybrid battery (traction battery) air
intake vents periodically for dust
and clogs.

If it is dusty or clogged or if “Main-
tenance Required for Traction Bat-
tery Cooling Parts See Owner’s
Manual” is displayed on the
multi-information display, clean the
air intake vent using the following
procedures:

NOTICE

■

If “Maintenance Required for Trac-

tion Battery Cooling Parts See

Owner’s Manual” is displayed on the

multi-information display

Clean the air intake vent immediately.

If the vehicle is continuously driven with

the warning message displayed, it may

cause a malfunction or output restriction

of the hybrid battery (traction battery).

Cleaning procedure

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cleaner, etc.

Disengage the 6 claws as shown in
the illustration.
Remove the filter from the cover.

Remove the dust and sand from the
filter.

Using a vacuum cleaner, etc., absorb dust

and sand from the filter by profiling the

nozzle lightly along the fold.

Hold the filter to the light and check
if it is not clogged.

If the dust or sand cannot be removed

completely, contact your Lexus dealer.

Reinstall the filter to the cover.

Install the filter to the cover.
Engage the filter to the 6 claws as
shown in the illustration.

Make sure that the filter is not crooked or
deformed when installing it.

Install the air intake vent cover.

Insert the tab of the cover as shown
in the illustration.
Push the cover to engage the 6
claws.

Install the clip.

A
B

494

6-3. Do-it-yourself maintenance



If “Maintenance Required for Trac-
tion Battery Cooling Parts See
Owner’s Manual” was displayed on
the multi-information display

Start the hybrid system and check
that the warning message is no lon-
ger displayed.

It may be necessary to drive the vehicle for

approximately 20 minutes before the

warning message is displayed again then

disappears.
If the warning message does not disappear

after some time, have the vehicle inspected

by your Lexus dealer.

■

If the dust or sand on the filter cannot be

removed

It is recommended to use a vacuum cleaner

with plastic brushes.

WARNING

■

When cleaning the air intake vent

●

Do not use water or other liquids to

clean the air intake vent. If water is

applied to the hybrid battery (traction

battery) or other components, a mal-

function or fire may occur.

●

Before cleaning the air intake vents,

make sure to turn the power switch off

to stop the hybrid system.

●

Do not put a hand or leg in the air

intake vent. If it is caught in a cooling

fan, or if it touches a high voltage part

that results in an electric shock, death

or serious injuries may result.

NOTICE

■

When cleaning the air intake vent

Do not use an air blow gun, etc.

Dust may be blown out, possibly causing

a malfunction or output restriction of the

hybrid battery (traction battery).

■

To prevent damage to the vehicle

Observe the following precautions:

●

Do not allow liquid or foreign matter to

enter the air intake vent.

●

Make sure to reinstall the filter and

cover to their original positions after

cleaning.

●

Do not install anything to the air intake

vent other than the exclusive filter for

this vehicle or use the vehicle without

the filter installed.

■

To prevent damage to the filter

Observe the following precautions.

If the filter is damaged, have it replaced

with a new filter by your Lexus dealer.

●

Do not use an air blow gun, etc.

●

Do not press hard a vacuum cleaner,

etc. against the filter.

●

Do not use a hard brush, such as a

metal brush.

●

Do not break the fold of the filter.

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■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart access system with push-but-

ton start and wireless remote control will

not function properly.

●

The operational range will be reduced.



Flathead screwdriver



Small flathead screwdriver



Lithium battery CR2032

■

Use a CR2032 lithium battery

●

Batteries can be purchased at your Lexus

dealer, local electrical appliance shops or

camera stores.

●

Replace only with the same or equivalent

type recommended by the manufacturer.

●

Dispose of used batteries according to

the local laws.

Take out the mechanical key.

Remove the cover.

To prevent damage to the key, cover the tip

of the flathead screwdriver with a tape.

Remove the depleted battery.

Insert a new battery with the “+” terminal

facing up.

Electronic key battery

Replace the battery with a new one
if it is depleted.
As the key may be damaged if the
following procedure is not per-
formed properly, it is recom-
mended that key battery
replacement be performed by your
Lexus dealer.

You will need the following items:

Replacing the battery

496

6-3. Do-it-yourself maintenance

WARNING

■

Battery precautions

Observe the following precautions.

Failure to do so may result in death or

serious injury.

●

Do not swallow the battery. Doing so

may cause chemical burns.

●

A coin battery or button battery is

used in the electronic key. If a battery is

swallowed, it may cause severe chemi-

cal burns in as little as 2 hours and may

result in death or serious injury.

●

Keep away new and removed batteries

from children.

●

If the cover cannot be firmly closed,

stop using the electronic key and stow

the key in the place where children

cannot reach, and then contact your

Lexus dealer.

●

If you accidentally swallow a battery or

put a battery into a part of your body,

get emergency medical attention

immediately.

■

To prevent battery explosion or leak-

age of flammable liquid or gas

●

Replace the battery with a new battery

of the same type. If a wrong type of

battery is used, it may explode.

●

Do not expose batteries to extremely

low pressure due to high altitude or

extremely high temperatures.

●

Do not burn, break or cut a battery.

NOTICE

■

When replacing the battery

Use a flathead screwdriver of appropri-

ate size. Applying excessive force may

deform or damage the cover.

■

For normal operation after replacing

the battery

Observe the following precautions to

prevent accidents:

●

Always work with dry hands.

Moisture may cause the battery to

rust.

●

Do not touch or move any other com-

ponent inside the remote control.

●

Do not bend either of the battery ter-

minals.

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6-3. Do-it-yourself maintenance

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Turn the power switch off.

Open the fuse box cover.



Engine compartment

Push in the claw and remove the lid.
• Type A

• Type B



Driver’s side instrument panel

Remove the lid.



Luggage compartment

Secure the deck board using the hook.
(



P.425)

Remove the side board and cover.

Push in the claw and remove the lid.

Checking and replacing
fuses

If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.

Checking and replacing fuses

498

6-3. Do-it-yourself maintenance

Remove the fuse with the pullout
tool.
Only some fuses can be removed
using the pullout tool.

Check if the fuse is blown.

Normal fuse
Blown fuse

Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Many types of fuse are used on this vehicle.
This illustration shows a common type of
fuse used on this vehicle.

■

After a fuse is replaced

●

If the lights do not turn on even after the

fuse has been replaced, a bulb may need

replacement. (



P.500)

●

If the replaced fuse blows again, have the

vehicle inspected by your Lexus dealer.

■

If there is an overload in a circuit

The fuses are designed to blow, protecting

the wiring harness from damage.

■

When replacing light bulbs

Lexus recommends that you use genuine

Lexus products designed for this vehicle.

Because certain bulbs are connected to cir-

cuits designed to prevent overload,

non-genuine parts or parts not designed for

this vehicle may be unusable.

A
B

WARNING

■

To prevent system breakdowns and

vehicle fire

Observe the following precautions.

Failure to do so may cause damage to

the vehicle, and possibly a fire or injury.

●

Never use a fuse of a higher amperage

rating than that indicated, or use any

other object in place of a fuse.

●

Always use a genuine Lexus fuse or

equivalent.

Never replace a fuse with a wire, even

as a temporary fix.

●

Do not modify the fuses or fuse boxes.

■

Fuse box near the power control unit

Never check or replace the fuses as

there are high voltage parts and wiring

near the fuse box.

Doing so may cause electric shock,

resulting in death or serious injury.

NOTICE

■

Before replacing fuses

Have the cause of electrical overload

determined and repaired by your Lexus

dealer as soon as possible.

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

Vehicles without single-beam head-
lights

Adjustment bolt A
Adjustment bolt B



Vehicles with single-beam head-
lights

Adjustment bolt A
Adjustment bolt B

Make sure the vehicle has a full
tank of gasoline and the area
around the headlight is not
deformed.

Park the vehicle on level ground.

Sit in the driver’s seat.

Bounce the vehicle several times.

Using a phillips-head screwdriver,
turn bolt A in either direction.

Remember the turning direction and the

number of turns.



Vehicles without single-beam head-
lights



Vehicles with single-beam head-
lights

Turn bolt B the same number of
turns and in the same direction as
step

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.

Headlight aim

Vertical movement adjusting
bolts

Before checking the headlight
aim

A
B

Adjusting the headlight aim

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■

Front

Front turn signal light (bulb type)

■

Replacing the following bulbs

If any of the lights listed below has
burnt out, have it replaced by your
Lexus dealer.



Headlights



Parking lights and daytime running
lights



Front turn signal lights (LED type)



Front side marker lights



Front fog lights



Cornering lights (if equipped)



Side turn signal lights



Stop/tail lights



Back-up lights



Rear turn signal lights



Rear side marker lights



High mounted stoplight



License plate lights



Outer foot lights

■

LED Lights

The lights other than the front turn signal

lights (bulb type) each consist of a number

of LEDs. If any of the LEDs burn out, take

your vehicle to your Lexus dealer to have

the light replaced.

■

Condensation build-up on the inside of

the lens

Temporary condensation build-up on the

inside of the headlight lens does not indi-

cate a malfunction. Contact your Lexus

dealer for more information in the following

situations:

●

Large drops of water have built up on the

inside of the lens.

●

Water has built up inside the headlight.

■

When replacing light bulbs



P.498

■

Front turn signal lights (bulb type)

Turn the bulb base counterclock-
wise and remove it.

Bulb locations

Replacing light bulbs

502

6-3. Do-it-yourself maintenance

Remove the light bulb.

Install a new light bulb and then
install the bulb base to the light unit
by inserting it and turning it clock-
wise.

After installing the bulb base, wiggle it

lightly to make sure it is securely installed

and turn the lights on to visually check that

there is no light leaking from between the

bulb base and light unit.

WARNING

■

To prevent injury

Before performing any light bulb

replacement procedure, be sure to turn

the power switch off. Failure to do so may

result in burns from hot components or a

part of your body may get caught on an

operating component, possibly causing

serious injury.

■

Replacing light bulbs

●

Turn off the lights. Do not attempt to

replace the bulb immediately after

turning off the lights.

The bulbs become very hot and may

cause burns.

●

Do not touch the glass portion of the

light bulb with bare hands. When it is

unavoidable to hold the glass portion,

use and hold with a clean dry cloth to

avoid getting moisture and oils on the

bulb.

Also, if the bulb is scratched or

dropped, it may blow out or crack.

●

Fully install light bulbs and any parts

used to secure them. Failure to do so

may result in heat damage, fire, or

water entering the headlight unit. This

may damage the headlights or cause

condensation to build up on the lens.

●

Do not attempt to repair or disassem-

ble the light bulbs, connectors, electric

circuits or component parts.

Doing so may result in death or serious

injury due to electric shock.

■

To prevent damage or fire

●

Make sure bulbs are fully seated and

locked.

●

Check the wattage of the bulb before

installing to prevent heat damage.

503

When trouble

ari

ses

When trouble arises

7-1. Essential information

Emergency flashers..................

504

If your vehicle has to be stopped in

an emergency..........................

504

If the vehicle is submerged or

water on the road is rising
........................................................

505

7-2. Steps to take in an emergency

If your vehicle needs to be towed

........................................................

507

If you think something is wrong

........................................................

508

If a warning light turns on or a

warning buzzer sounds ........

510

If a warning message is displayed

........................................................

520

If you have a flat tire..................

534

If the hybrid system will not start

........................................................

542

If you lose your keys.................

543

If the electronic key does not

operate properly ....................

544

If a door cannot be opened using

the door opener switch........

546

If the 12-volt battery is discharged

........................................................

548

If your vehicle overheats ........

555

If the vehicle becomes stuck

........................................................

559

504

7-1. Essential information

7-1.Essential information

Press the switch.

All the turn signal lights will flash. To turn
them off, press the switch once again.

■

Emergency flashers

●

If the emergency flashers are used for a

long time while the hybrid system is not

operating (while the “READY” indicator

is not illuminated), the 12-volt battery may

discharge.

●

If any of the SRS airbags deploy (inflate)

or in the event of a strong rear impact, the

emergency flashers will turn on automati-

cally.

The emergency flashers will turn off auto-

matically after operating for approxi-

mately 20 minutes. To manually turn the

emergency flashers off, press the switch

twice. (The emergency flashers may not

turn on automatically depending on the

force of the impact and conditions of the

collision.)

Steadily step on the brake pedal
with both feet and firmly depress it.

Do not pump the brake pedal repeatedly

as this will increase the effort required to

slow the vehicle.

Shift the shift position to N.



If the shift position is shifted to N

After slowing down, stop the vehi-
cle in a safe place by the road.

Stop the hybrid system.



If the shift position cannot be shifted
to N

Keep depressing the brake pedal
with both feet to reduce vehicle
speed as much as possible.

To stop the hybrid system, press
and hold the power switch for 2
consecutive seconds or more, or

Emergency flashers

The emergency flashers are used to
warn other drivers when the vehicle
has to be stopped on the road due
to a breakdown, etc.

Operating instructions

If your vehicle has to be
stopped in an emergency

Only in an emergency, such as if it
becomes impossible to stop the
vehicle in the normal way, stop the
vehicle using the following proce-
dure:

Stopping the vehicle

505

7-1. Essential information

n t

ris

press it briefly 3 times or more in
succession.

Stop the vehicle in a safe place by
the road.



If the door can be opened, open the
door and exit the vehicle.



If the door cannot be opened, open
the window using the power window
switch and ensure an escape route.



If the window can be opened, exit
the vehicle through the window.



If the door and window cannot be
opened due to the rising water,
remain calm, wait until the water
level inside the vehicle rises to the
point that the water pressure inside
of the vehicle equals the water pres-
sure outside of the vehicle and then
open the door after waiting for the
rising water to enter the vehicle, and
exit the vehicle.

When the outside water level exceeds half
the height of the door, the door cannot be
opened from the inside due to water pres-
sure.

■

Water level exceeds the floor

When the water level exceeds the floor and

time has passed, the electrical equipment

will get damaged, the power windows will

WARNING

■

If the hybrid system has to be turned

off while driving

Power assist for the steering wheel will

be lost, making the steering wheel

heavier to turn. Decelerate as much as

possible before turning off the hybrid sys-

tem.

If the vehicle is submerged
or water on the road is rising

This vehicle is not designed to be
able to drive on roads that are
deeply flooded with water. Do not
drive on roads where the roads may
be submerged or the water may be
rising. It is dangerous to remain in
the vehicle, if it is anticipated that
the vehicle will be flooded or set
adrift. Remain calm and follow the
following.

Lexus RX350h (2024 year). Manual in english - page 15