Lexus RX450h L (2022 year). Manual in english - page 22

367

6-3. Do-it-yourself maintenance

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●

When the engine is new, for example 

directly after purchasing the vehicle or 

after replacing the engine

●

If low quality oil or oil of an inappropriate 

viscosity is used

●

When driving at high engine speeds or 

with a heavy load, when towing, or when 

driving while accelerating or decelerat-

ing frequently

●

When leaving the engine idling for a long 

time, or when driving frequently through 

heavy traffic

■

After changing the engine oil

The engine oil maintenance data should be 

reset. Perform the following procedures:

1

Press 

 or 

 of the meter control 

switch to select 

 on the multi-infor-

mation display.

2

Press 

 or 

 of the meter control 

switch, select the “Vehicle Settings” 

then “Oil Maintenance”. (To confirm 
setting, press 

.)

3

Select the “Yes” and press 

.

4

A message is displayed on the 

multi-information display.

■

Engine coolant reservoir

The coolant level is satisfactory if it is 
between the “FULL” and “LOW” lines 
on the reservoir when the hybrid sys-
tem is cold.

Reservoir cap
“FULL” line
“LOW” line

If the level is on or below the “LOW” line, 
add coolant up to the “FULL” line. 
(



P.446)

WARNING

■

Used engine oil

●

Used engine oil contains potentially 

harmful contaminants which may 

cause skin disorders such as inflamma-

tion and skin cancer, so care should be 

taken to avoid prolonged and 

repeated contact. To remove used 

engine oil from your skin, wash thor-

oughly with soap and water.

●

Dispose of used oil and filters only in a 

safe and acceptable manner. Do not 

dispose of used oil and filters in house-

hold trash, in sewers or onto the 

ground.

Call your Lexus dealer, service station 

or auto parts store for information 

concerning recycling or disposal.

●

Do not leave used engine oil within the 

reach of children.

NOTICE

■

To prevent serious engine damage

Check the oil level on a regular basis.

■

When replacing the engine oil

●

Be careful not to spill engine oil on the 

vehicle components.

●

Avoid overfilling, or the engine could 

be damaged.

●

Check the oil level on the dipstick 

every time you refill the vehicle.

●

Be sure the engine oil filler cap is prop-

erly tightened.

Checking the coolant

A
B
C

368

6-3. Do-it-yourself maintenance

■

Power control unit coolant reser-
voir

The coolant level is satisfactory if it is 
between the “FULL” and “LOW” lines 
on the reservoir when the hybrid sys-
tem is cold.

Reservoir cap
“FULL” line
“LOW” line

If the level is on or below the “LOW” line, 
add coolant up to the “FULL” line. 
(



P.446)

■

Coolant selection

Only use “Toyota Super Long Life Coolant” 

or a similar high quality ethylene glycol 

based non-silicate, non-amine, non-nitrite, 

and non-borate coolant with long-life 

hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mix-

ture of 50% coolant and 50% deionized 

water. (Minimum temperature: -31°F 

[-35°C])
Canada:
“Toyota Super Long Life Coolant” is a mix-

ture of 55% coolant and 45% deionized 

water. (Minimum temperature: -44°F 

[-42°C])
For more details about coolant, contact 

your Lexus dealer.

■

If the coolant level drops within a short 

time of replenishing

Visually check the radiator, hoses, 

engine/power control unit coolant reservoir 

caps, drain cock and water pump.

If you cannot find a leak, have your Lexus 

dealer test the cap and check for leaks in 

the cooling system.

Check the radiator and condenser and 
clear away any foreign objects.
If either of the above parts is extremely 
dirty or you are not sure of their condi-
tion, have your vehicle inspected by 
your Lexus dealer.

A
B
C

WARNING

■

When the hybrid system is hot

Do not remove the engine/power control 

unit coolant reservoir caps and radiator 

cap.
The cooling system may be under pres-

sure and may spray hot coolant if the cap 

is removed, causing serious injuries, such 

as burns.

NOTICE

■

When adding coolant

Coolant is neither plain water nor 

straight antifreeze. The correct mixture 

of water and antifreeze must be used to 

provide proper lubrication, corrosion 

protection and cooling. Be sure to read 

the antifreeze or coolant label.

■

If you spill coolant

Be sure to wash it off with water to pre-

vent it from damaging parts or paint.

Checking the radiator and con-
denser

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6-3. Do-it-yourself maintenance

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Checking fluid level

The brake fluid level should be 
between the “MAX” and “MIN” lines 
on the tank.

■

Adding fluid

Make sure to check the fluid type and 
prepare the necessary item.



Fluid type

FMVSS No.116 DOT 3 or SAE J1703 
brake fluid



Item

Clean funnel

■

Brake fluid can absorb moisture from 

the air

Excess moisture in the brake fluid can cause 

a dangerous loss of braking efficiency. Use 

only newly opened brake fluid.

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.

WARNING

■

When the hybrid system is hot

Do not touch the radiator or condenser 

as they may be hot and cause serious 

injuries, such as burns.

Checking and adding the brake 
fluid

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.

370

6-3. Do-it-yourself maintenance



RX450h

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



RX450hL

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



RX450h

1

Lift the deck board and attach the 
hook. (



P.326)

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.

12-volt battery

Location

Removing the 12-volt battery 
cover

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6-3. Do-it-yourself maintenance

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2

Remove the cover after removing 
the clips.

1

Press

2

Pull out



RX450hL

1

Remove the deck board and side 
auxiliary box cover. (



P.327)

2

Remove the 12-volt battery cover.

3

Remove the deck side trim cover.

■

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

●

The hybrid system may not start. Follow 

the procedure below to initialize the sys-

tem.

1

Shift the shift lever to P.

2

Open and close any of the doors.

3

Restart the hybrid system.

●

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 ACCESSORY mode. 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 recon-

nected, 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 before 

disconnect the 12-volt battery. Take extra 

care when connecting the 12-volt battery 

if the power switch mode prior to dis-

charge is unknown.

If the system will not start even after multiple 

attempts at all the methods above, contact 

your Lexus dealer.

372

6-3. Do-it-yourself maintenance

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.

■

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.445

■

When disconnecting the 12-volt bat-

tery (RX450h)

Do not disconnect the negative (-) termi-

nal on the body side as shown. The dis-

connected negative (-) terminal may 

touch the positive (+) terminal, which 

may cause a short and result in death or 

serious injury.

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.

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

RX450h

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



RX450hL

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



RX450h

Install the 12-volt battery cover with the 
clips.

1

Push up center position

2

Insert

3

Press



RX450hL

1

Install the deck side trim cover.

2

Install the 12-volt battery cover.

Exterior

A
B

A
B

Installing the 12-volt battery 
cover

374

6-3. Do-it-yourself maintenance

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.

■

Proper storage of the spare tire 

(RX450hL)

As an improperly stored spare tire may 

cause damage to the wire cable that holds 

it, check that the spare tire is stored prop-

erly on a daily basis.

●

If the stored spare tire appears to be 

slanted or rattles while driving, the spare 

tire may not be properly stored. Store the 

spare tire again by performing the follow-

ing tire change procedure correctly:

1

If the spare tire is slanted, the hoist 

assembly may be stuck in the wheel 

opening. If the spare tire rattles while 

driving, it may not be fully raised. Lower 

the spare tire to the ground and make 

sure that the hoist assembly is perpen-

dicular to the wheel opening.

2

Raise the tire slowly and steadily until a 

click is heard and the jack handle skips.

If the spare tire cannot be lowered, the wire 

cable may be severed. Have the vehicle 

Tires

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

Checking tires

A
B
C

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6-3. Do-it-yourself maintenance

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inspected at your Lexus dealer.

■

Maximum load of tire

Check that the maximum load of the 

replacement tire is greater than 1/2 of the 

Gross Axle Weight Ratings (GAWR) of 

either the front axle or the rear axle, which-

ever 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.463)

■

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 
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.286)

■

If the tread on snow tires wears down 

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is 

lost.

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 com-

pact spare tire installed.

376

6-3. Do-it-yourself maintenance

Rotate the tires in the order shown.

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.
Do not fail to initialize the tire pressure 
warning system after tire rotation.

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 detected by the 

tire pressure warning system can be 
displayed on the multi-information 
display. (



P.88)

The illustration used is intended as an 
example, and may differ from the image 
that is actually displayed on the multi-infor-
mation display.



If the tire pressure drops below a 
predetermined level, the driver is 
warned by a screen display and a 
warning light. (



P.414)

The illustration used is intended as an 
example, and may differ from the image 
that is actually displayed on the multi-infor-
mation display.

■

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.

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

Tire pressure warning system

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6-3. Do-it-yourself maintenance

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■

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 wheel without the tire pressure warning 

valve and transmitter is 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 conditions, 

the display may be corrected by driving and 

changing the radio wave conditions.

●

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 function.

■

Warning performance of the tire pres-

sure warning system

The warning of the tire pressure warning 

system will change in accordance with the 

conditions under which it was initialized. For 

this reason, the system may give a warning 

even if the tire pressure does not reach a 

low enough level, or if the pressure is higher 

than the pressure that was adjusted to when 

the system was initialized.

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 and 
the tire pressure warning system must 
be initialized. Have tire pressure warn-
ing valve and transmitter ID codes reg-
istered by your Lexus dealer. 
(



P.379)

■

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. After driving for about 20 min-

utes, the tire pressure warning light blinks 

for 1 minute and stays on to indicate a sys-

tem malfunction.

Installing tire pressure warning 
valves and transmitters

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 and the tire pressure 

warning valves could be bound.

378

6-3. Do-it-yourself maintenance

■

The tire pressure warning system 
must be initialized in the following 
circumstances:



When the tire inflation pressure is 
changed such as when changing 
traveling speed.



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



When rotating the tires.

When the tire pressure warning system 
is initialized, the current tire inflation 
pressure is set as the benchmark pres-
sure.

■

How to initialize the tire pressure 
warning system

1

Park the vehicle in a safe place and 
turn the power switch off.

Initialization cannot be performed while 

the vehicle is moving.

2

Adjust the tire inflation pressure to 
the specified cold tire inflation pres-
sure level.

Make sure to adjust the tire pressure to the 

specified cold tire inflation pressure level. 

The tire pressure warning system will oper-

ate based on this pressure level.

3

Turn the power switch to ON 
mode.

4

Select 

 on the multi-information 

display.

5

Press 

 or 

 of the meter con-

trol switch, select the “Vehicle Set-
tings” screen and then press the 

.

6

Press 

 or 

 of the meter con-

trol switch, select the “TPMS” 
screen and then press and hold the 

 until the tire pressure warn-

ing light blinks slowly 3 times.

“- -” will be displayed for inflation pressure 

of each tire on the multi-information dis-

play while the tire pressure warning system 

determines the position of each tire.

7

Drive the vehicle at approximately 
25 mph (40 km/h) or more for 
approximately 10 to 30 minutes 
until the inflation pressure of each 
tire is displayed on the multi-infor-
mation display.

NOTICE

●

When replacing tire valve caps, do not 

use tire valve caps other than those 

specified. The cap may become stuck.

■

To avoid damage to the tire pressure 

warning valves and transmitters

When a tire is repaired with liquid seal-

ants, the tire pressure warning valve and 

transmitter may not operate properly. If a 

liquid sealant is used, contact your Lexus 

dealer or other qualified service shop as 

soon as possible. Make sure to replace 

the tire pressure warning valve and trans-

mitter when replacing the tire. (



P.377)

Initializing the tire pressure 
warning system

379

6-3. Do-it-yourself maintenance

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When position of each tire is determined, 

the inflation pressure of each tire will be 

displayed on the multi-information display.
If tire inflation pressure becomes low 

before the inflation pressure is displayed, 

the tire pressure warning light will come 

on.
Depending on the vehicle and driving con-

ditions, initialization may take up to 

approximately 1 hour to complete.

■

Initializing the tire pressure warning sys-

tem

Initialize the system with the tire inflation 

pressure adjusted to the specified level.

■

If you press the tire pressure warning 

reset switch accidentally

If initialization is performed, adjust the tire 

inflation pressure to the specified level and 

initialize the tire pressure warning system 

again.

■

Initialization procedure

●

Make sure to carry out initialization after 

adjusting the tire inflation pressure.

Also, make sure the tires are cold before 

carrying out initialization or tire inflation 

pressure adjustment.

●

If you have accidentally turned the power 

switch off during initialization, it is not 

necessary to press the reset switch again 

as initialization will restart automatically 

when the power switch has been turned 

to ON mode for the next time.

●

If you accidentally press the reset switch 

when initialization is not necessary, adjust 

the tire inflation pressure to the specified 

level when the tires are cold, and conduct 

initialization again.

●

While the position of each tire is being 

determined and the inflation pressures 

are not being displayed on the 

multi-information display, if the inflation 

pressure of a tire drops, the tire pressure 

warning light will come on.

■

When initialization of the tire pressure 

warning system has failed

Initialization may take longer to complete if 

the vehicle is driven on an unpaved road. 

When performing initialization, drive on a 

paved road if possible. Depending on the 

driving environment and condition of the 

tires, initialization will be completed in 

approximately 10 to 30 minutes. If initializa-

tion is not complete after driving approxi-

mately 10 to 30 minutes, continue driving 

for a while.
If the inflation pressure of each tire is not 

displayed after driving for approximately 1 

hour, perform the following procedure.

●

Park the vehicle in a safe place for 

approximately 20 minutes. Then drive 

straight (with occasional left and right 

turns) at approximately 25 mph (40 

km/h) or more for approximately 10 to 

30 minutes.

However, in the following situations, the tire 

inflation pressure will not be recorded and 

the system will not operate properly. Per-

form initialization again.

●

When operating the tire pressure warn-

ing reset switch, the tire pressure warning 

light does not blink 3 times.

●

After performing initialization, the tire 

pressure warning light blinks for 1 minute 

then stays on while driving.

If the inflation pressure of each tire is still not 

displayed, have the vehicle inspected by 

your Lexus dealer.

The tire pressure warning valve and 
transmitter is equipped with a unique 
ID code. When replacing a tire pres-
sure warning valve and transmitter, it is 

WARNING

■

When initializing the tire pressure 

warning system

Do not initializing tire inflation pressure 

without first adjusting the tire inflation 

pressure to the specified level. Other-

wise, the tire pressure warning light may 

not come on even if the tire inflation pres-

sure is low, or it may come on when the 

tire inflation pressure is actually normal.

Registering ID codes

380

6-3. Do-it-yourself maintenance

necessary to register the ID code. 
Have the ID code registered by your 
Lexus dealer.

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



P.452)

Tire valve
Tire pressure gauge

Tire inflation pressure

Checking the specified tire infla-
tion pressure

Inspection and adjustment pro-
cedure

A
B

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1

Remove the tire valve cap.

2

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

3

Read the pressure using the gauge 
gradations.

4

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.

5

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

6

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-

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.

382

6-3. Do-it-yourself maintenance

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.377)



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



When rotating, repairing or chang-
ing your tires, check that the wheel 
nuts are still tight after driving 1000 
miles (1600 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.

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 

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 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.

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