Lexus RX450h L (2022 year). Manual in english - page 23

383

6-3. Do-it-yourself maintenance

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1

Turn the power switch off.

2

Open the glove box. Slide off the 
damper.

3

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.

4

Remove the cover.

5

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

6

Remove the filter case.

There may be foreign objects on top of the 

air conditioning filter.

7

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

The “

UP” marks shown on the filter 

Air conditioning filter

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

Removing the air conditioning 
filter

A

B

384

6-3. Do-it-yourself maintenance

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.

385

6-3. Do-it-yourself maintenance

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1

Change the rest position of the 
windshield wipers to the service 
position using the wiper lever and 
then lift a windshield wiper. 
(



P.207)

2

While pressing and holding the 
wiper blade lock release button, 
remove the wiper blade.

When performing this operation, make 

sure to hold the hook portion of the wiper 

arm securely.

Hook portion

3

While disengaging the cap lock, 
using a tool such as a flathead 
screwdriver if necessary, remove 
the wiper insert.

Hold the cap on the end of the wiper insert 

when removing the wiper insert. (The cap 

is integrated into the wiper insert.)
If using a screwdriver, make sure to wrap its 

tip with tape to protect the wiper blade.

Cap lock

4

Install a new wiper insert.

Make sure to push the wiper insert firmly 

until the cap lock is engaged.
After installation, check that the cap lock is 

locked securely.

5

Install the wiper blade to the wiper 
arm.

Make sure to push the wiper blade until it is 

locked.
When performing this operation, make 

sure to hold the hook portion of the wiper 

arm securely.
After installation, check that the wiper 

blade is locked securely.

6

After replacing the wiper inserts, 
place the windshield wipers on the 
windshield and lower them to the 
retracted position. (



P.207)

Do not drive the vehicle with the wind-

shield wipers lifted.

Windshield wiper inserts

Replacing a windshield wiper 
insert

A

A

386

6-3. Do-it-yourself maintenance

■

Replacing the rear wiper insert

Have the rear wiper insert replaced by your 

Lexus dealer.

■

Handling of the windshield wiper blades 

and inserts

Improper handling of the windshield wiper 

blades and inserts may cause them to be 

damaged. If it is difficult to follow the wiper 

blade and insert replacement procedure 

precisely, contact your Lexus dealer.

■

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



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.

1

Take out the mechanical key.

2

Remove the cover.

To prevent damage to the key, cover the tip 

Electronic key battery

Replace the battery with a new one 
if it is depleted.

You will need the following items:

Replacing the battery

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6-3. Do-it-yourself maintenance

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of the flathead screwdriver with a tape.

3

Remove the depleted battery.

When removing the cover, the electronic 

key module may stick to the cover and the 

battery may not be visible. In this case, 

remove the electronic key module in order 

to remove the battery.
Insert a new battery with the “+” terminal 

facing up.

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

■

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.

388

6-3. Do-it-yourself maintenance

1

Turn the power switch off.

2

Open the fuse box cover.



Engine compartment

Push the tab in and lift the lid off.



Driver’s side instrument panel

Remove the lid.



Luggage compartment (type A fuse 
box)

RX450h:
Remove the 12-volt battery cover. 
(



P.370)

RX450hL:
Remove the deck board and side auxiliary 
box cover and 12-volt battery cover. 
(



P.370)



Luggage compartment (type B fuse 
box)

RX450h:
Remove the terminal cover.

RX450hL:
Remove the terminal cover.

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

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6-3. Do-it-yourself maintenance

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3

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

4

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.392)

●

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.

390

6-3. Do-it-yourself maintenance



Vehicles without single-beam head-
lights

Adjustment bolt A
Adjustment bolt B



Vehicles with single-beam head-
lights

Adjustment bolt A
Adjustment bolt B

1

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

NOTICE

■

Before replacing fuses

Have the cause of electrical overload 

determined and repaired by your Lexus 

dealer as soon as possible.

Headlight aim

Vertical movement adjusting 
bolts

Before checking the headlight 
aim

A
B

A
B

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6-3. Do-it-yourself maintenance

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2

Park the vehicle on level ground.

3

Sit in the driver’s seat.

4

Bounce the vehicle several times.

1

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

2

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

1

.

If the headlight cannot be adjusted using 

this procedure, take the vehicle to your 

Lexus dealer to adjust the headlight aim.



Vehicles without single-beam head-
lights



Vehicles with single-beam head-
lights

Adjusting the headlight aim

392

6-3. Do-it-yourself maintenance

Check the wattage of the light bulb to 
be replaced. (



P.460)



P.123

■

Front

Front side marker light (vehicles 
with single-beam headlights)
Front turn signal light (vehicles with 
single-beam headlights)

Light bulbs

You may replace the following bulbs 
by yourself. The difficulty level of 
replacement varies depending on 
the bulb. If necessary bulb replace-
ment seems difficult to perform, 
contact your Lexus dealer.

For more information about replac-
ing other light bulbs, contact your 
Lexus dealer.

Preparing for light bulb replace-
ment

Canceling the power back door 
system

Bulb locations

A

B

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6-3. Do-it-yourself maintenance

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■

Rear

Back-up light (bulb type)
Rear 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.



Headlight



Parking lights and daytime running 
lights



Front turn signal lights (vehicles 
without single-beam headlights)



Front side marker lights (vehicles 
without single-beam headlights)



Front fog lights (if equipped)



Cornering lights (if equipped)



Side turn signal lights



Stop/tail lights



Back-up lights (LED type)



Rear turn signal light (LED type)



Rear side marker lights



High mounted stoplight



License plate lights



Outer foot lights

■

LED Lights

The lights other than the front turn signal 

lights (vehicles with single-beam head-

lights), front side marker lights (vehicles 

with single-beam headlights), rear turn sig-

nal lights (bulb type) and back-up 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.389

■

Front side marker lights (vehicles 
with single-beam headlights)

1

To ensure enough space to per-
form work, turn the steering wheel 
to rotate the front wheel away from 
the bulb to be replaced.
Remove the 3 fender liner clips.

Turn the steering wheel to the left when 

replacing the right side light bulb, and turn 

the steering wheel to the right when 

replacing the left side light bulb.
When removing a fender liner clip, use a 

A
B

Replacing light bulbs

394

6-3. Do-it-yourself maintenance

flathead screwdriver to pry the center por-

tion out and then remove the whole clip.

2

Pull back the fender liner until the 
connector is visible.

3

Partially remove the fender liner 
and turn the bulb base counter-
clockwise and remove it.

4

Remove the light bulb.

5

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.

395

6-3. Do-it-yourself maintenance

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6

Reinstall the fender liner and install 
the 3 fender liner clips.

■

Front turn signal lights (vehicles 
with single-beam headlights)

1

Removing the engine compartment 
cover.

1

Push the center of the clip.

2

Remove the clip.

2

For the right side only: Remove the 
bolt of washer fluid inlet.

3

For the right side only: Open the 
cap, remove the bracket  , and 
move the washer fluid inlet.

A

396

6-3. Do-it-yourself maintenance

4

Turn the bulb base counterclock-
wise and remove it.

5

Remove the light bulb.

6

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.

7

For the right side only: Install the 
bracket   and close the cap.

8

For the right side only: Fix the 
washer fluid inlet.

1

Align the tab position and install 
washer fluid inlet.

2

Fasten the bolt.

A

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6-3. Do-it-yourself maintenance

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9

Install the engine compartment 
cover.

1

Push up center portion

2

Insert

3

Press

■

Rear turn signal lights (bulb type)

1

Open the back door and apply pro-
tective tape to the vehicle body 
around the taillight.

Use masking tape, etc. Do not use duct 

tape, as it may leave residue or damage the 

paint when removed.

2

Using a flathead screwdriver, 
remove the cover.

To prevent scratching the vehicle, wrap the 

tip of the flathead screwdriver with a cloth, 

etc.

3

Remove the 2 screws.

4

Remove the taillight unit.

1

Attach 2 long pieces of masking 

398

6-3. Do-it-yourself maintenance

tape to the taillight unit and fold the 
excess in half.

2

Hold the folded portion and pull it 
toward the rear of the vehicle to 
remove the light unit.

5

Turn the bulb base counterclock-
wise and remove it.

6

Remove the light bulb.

7

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 on the rear turn signal lights to 

visually check that there is no light leaking 

from between the bulb base and light unit.

8

Install the light unit.

Align the tabs and push the light unit-

toward the front of the vehicle to install it.

9

Install the 2 screws.