Lexus NX450H+ (2024 year). Manual in english

Checking tire inflation pressure

You should check tire inflation pressure every two weeks, or at least once a
month.Do not forget to check the spare.

WARNING

In order to ensure the performance of the tires, maintain proper tire inflation pressure.
If the tires are not properly inflated, the following may occur:

●

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 damage

●

Greater possibility of tire damage while driving (due to road hazards, expansion joints,
sharp edges in the road, etc.)

NOTICE

After inspecting and adjusting tire inflation pressure, make sure to install the tire valve
caps.
If a valve cap is not installed, dirt or moisture may get into the valve and cause an air leak,
resulting in decreased tire inflation pressure.

Driving with incorrect tire inflation pressure may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor handling

●

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
reading.

8-5. Tire maintenance

631

Maintenance and car

●

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
generated in the tire. Do not reduce tire inflation pressure after driving.

●

Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is balanced.

Checking the specified tire inflation pressure

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

Tire inflation pressure inspection and adjustment procedure

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 recom-
mended 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 adjustment, apply
soapy water to the valve and check for leakage.

Put the tire valve cap back on.

8-5. Tire maintenance

632

Wheels

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

Wheel selection

When replacing wheels, care should be taken to ensure that they are equivalent to
those removed in load capacity, diameter, rim width and inset

Replacement wheels are available at your Lexus dealer.
Lexus does not recommend using the following:

●

Wheels of different sizes or types

●

Used wheels

●

Bent wheels that have been straightened

INFORMATION

■

When replacing wheels

The wheels of your vehicle are equipped with tire pressure warning valves and transmit-
ters 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 pressure warning valves and transmitters must be
installed.

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, contact 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 tightened, leading to bolt or disc wheel damage. In addition, the oil

*1 :

Conventionally referred to as offset.

8-5. Tire maintenance

635

Maintenance and car

WARNING

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 precautions 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 accident.

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 transmitters may not work properly with non-genuine
wheels.

Aluminum wheel precautions

Observe the following precautions when handling the aluminum wheels.

●

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

●

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

●

Be careful not to damage the aluminum wheels when using tire chains.

●

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

8-5. Tire maintenance

636

Replacing the tire

When replacing the tires yourself, prepare the necessary tools and a jack.
This vehicle uses wheel bolts. When using wheels that were installed when the
vehicle was shipped from the factory, specialized Lexus genuine wheel bolts must
be used.
If necessary tire replacement seems difficult to perform, contact your Lexus dealer.

Preparation for lifting the vehicle with a jack

INFORMATION

■

Jack and tools

As your vehicle is equipped with run-flat tires, the following tools for replacing a tire are
not included with your vehicle. They can be purchased at your Lexus dealer.

●

Jack

●

Jack handle

●

Wheel bolt socket

●

Guide pin

●

Wheel bolt wrench

Before lifting the vehicle with a jack, perform the following.

●

Stop the vehicle in a safe place on a hard, flat surface.

●

Set the parking brake.

●

Change the shift position to P.

●

Stop the hybrid system.

8-5. Tire maintenance

637

Maintenance and car

Storage position of the tools and jack

Jack

WARNING

Improper use of the tire jack may cause the vehicle to fall. Therefore, observe the
following precautions.

●

Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.

●

Only use the tire jack that comes with this vehicle for replacing a flat tire. Do not
use it on other vehicles, and do not use other tire jacks for replacing tires on this
vehicle.

Jack handle

Wheel bolt socket

Towing eyelet

Guide pin

Wheel bolt wrench

Screwdriver

* :

If equipped

8-5. Tire maintenance

638

Taking out the jack

Remove the deck board.

Take out the jack.

Disengage the tightening strap.

Removing a tire

WARNING

■

Precautions for replacing a tire

●

Do not try to remove the wheel ornament by hand.
Take due care in handling the ornament to avoid unexpected personal injury.

●

Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes
will be extremely hot. Touching these areas with hands, feet or other body parts while
changing a tire, etc., may result in burns.

■

Setting the power back door when replacing the tires

When replacing a tire, make sure to disable the power back door. If not disabled, the
power back door may operate unintentionally, and hands or fingers may be caught and
injured.

8-5. Tire maintenance

639

Maintenance and car

Chock the tires.

Wheel chock position

●

Flat tire: Front left
Place the wheel chock behind the rear right tire.

●

Flat tire: Front right
Place the wheel chock behind the rear left tire.

●

Flat tire: Rear left
Place the wheel chock in front of the front right tire.

●

Flat tire: Rear right
Place the wheel chock in front of the front left tire.

Using a wheel bolt wrench, slightly loosen the
wheel bolts (approximately one turn).

Turn the tire jack portion by hand until the
notch of the jack is in contact with the jack
point.

WARNING

Make sure the jack is positioned properly in the jack point.

8-5. Tire maintenance

640

Install the wheel bolt wrench to the jack han-
dle.

Raise the vehicle until the tire is slightly raised
off the ground.

WARNING

Observe the following precautions when using the jack.

●

Do not put any part of your body under the vehicle while it is supported by the
jack.

●

Do not start the hybrid system or drive the vehicle while the vehicle is supported
by the jack.

●

Do not raise the vehicle while someone is inside.

●

When raising the vehicle, do not put an object on or under the jack.

●

Do not raise the vehicle to a height greater than that required to replace the tire.

●

Use a jack stand if it is necessary to get under the vehicle.

Remove the uppermost wheel bolt and install
the guide pin by hand.

Turn the guide pin clockwise to tighten it until it
stops.

WARNING

When removing or installing a tire, make sure to use the guide pin.
Also, the guide pin is made of resin. It may be damaged if the wheel is placed
anywhere other than

or if a large amount of force is applied to the guide pin.

8-5. Tire maintenance

641

Maintenance and car

WARNING

Remove the remaining wheel bolts and the
tire.

When resting the tire on the ground, place the
tire so that the wheel design faces up, to avoid
scratching the wheel surface.

Installing the tire

Remove any dirt or foreign matter from the
wheel contact surfaces and wheel bolts.

If foreign matter is not removed, the wheel bolts
may loosen while the vehicle is in motion, and the
wheel may come off.

Align a wheel bolt hole on the spare tire with
the guide pin, and set the spare tire on the
guide pin.

Align the center hole of the wheel with the center
of the hub and securely set the spare tire so that
the wheel and hub contact surfaces are touching.

WARNING

When removing or installing a tire, make sure to use the guide pin.
Also, the guide pin is made of resin. It may be damaged if the wheel is placed
anywhere other than

or if a large amount of force is applied to the guide pin.

8-5. Tire maintenance

642

WARNING

Loosely tighten each wheel bolt by hand or
using a wheel bolt socket .

Do not use the wheel bolt socket for anything
other than loosely tightening the wheel bolts by
hand.

WARNING

Observe the following precautions. Failure to do so may lead to the wheel bolts
loosening and the tire falling off.

●

The contact surfaces of the wheel bolt and wheel are designed specifically to fit
together. When using wheels that were installed when the vehicle was shipped
from the factory, use specialized Lexus genuine wheel bolts. Do not use wheel
bolts designed for other models, model years or types even if they are Lexus
genuine parts.
If the vehicle does not have wheels that were installed to the vehicle when it was
shipped from the factory, the factory-installed wheel bolts may not be appropriate
for the wheel. Contact either the retailer where the wheels were purchased or the
manufacturer of the wheels for proper installation advice.

●

Never apply oil or grease to the wheel bolts or their contact surface on the wheel

Doing so may cause the wheel bolts to be tightened excessively, leading to
damage to the wheel bolts, the threaded portion the wheel bolts install to

, or

the wheel.
Remove any oil or grease that has adhered when installing the wheel bolts.

8-5. Tire maintenance

643

Maintenance and car

WARNING

●

If a wheel bolt hole in a wheel or the threads of a wheel bolt or the wheel hub are
deformed, cracked, rusty or otherwise damaged, have the vehicle inspected by
your Lexus dealer.

●

Do not install the wheel ornament if it is damaged, as it may fly off the wheel while
the vehicle is being driven.

Remove the guide pin and loosely tighten the
wheel bolt as in step

Lower the vehicle.

WARNING

When lowering the vehicle, make sure that no one is near the vehicle. If there are
people nearby, warn them vocally before lowering the vehicle.

8-5. Tire maintenance

644

Securely tighten the wheel bolts two or three
times in the order shown in the illustration
using a wheel bolt wrench.

Tightening torque: 103 ft•lbf (140 N•m, 14.3
kgf•m)

WARNING

When tightening the wheel bolts, do not tighten them excessively. Doing so may
cause the wheel bolts, the threads of the wheel hub, or the wheel to be damaged.

Stow the jack and all tools.

WARNING

●

After using the tools and jack, before driving, make sure that the tools and jack are
securely stored. Failure to do so may result in injury during a collision or sudden
braking.

●

After replacing a tire, check the tightening torque as soon as possible.
If you cannot confirm the tightening torque yourself, have the vehicle inspected at
your Lexus dealer.

NOTICE

When removing or fitting the wheels, tires or the tire pressure warning valves and
transmitters, contact your Lexus dealer as the tire pressure warning valves and
transmitters may be damaged if not handled correctly.

8-5. Tire maintenance

645

Maintenance and car

Headlight aim

Vertical movement adjusting bolts

▶

Type A

Adjustment bolt A

Adjustment bolt B

▶

Type B

Adjustment bolt A

Adjustment bolt B

Checking the headlight aim

Before checking the headlight aim, confirm the following.

●

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

●

The vehicle is parked on level ground.

●

The tire inflation pressure is at the specified level.

●

Someone is sitting in the driver's seat.

●

The vehicle has been bounced several times after being parked.

8-5. Tire maintenance

646

Adjusting the headlight aim

Using a Phillips-head screwdriver, turn bolt A
in either direction. Remember the turning di-
rection and the number of turns.

Turn bolt B the same number of turns and in
the same direction as step 1.

If the headlight cannot be adjusted using this pro-
cedure, take the vehicle to your Lexus dealer to
adjust the headlight aim.

▶

Type A

▶

Type B

▶

Type A

▶

Type B

8-5. Tire maintenance

647

Maintenance and car

When trouble arises

9-1. What to do if a problem occurs

while driving

What to do if a problem oc-

curs while driving...................

651

9-2. If a warning is indicated on the

meter

If a warning light turns on/

flashes........................................

654

If a warning message is dis-

played........................................

667

9-3. If the hybrid system will not start

When the hybrid system

cannot be started even
though the correct start-
ing procedure is being fol-
lowed ........................................

690

When the interior lights or

headlights are dim and the
hybrid system cannot be
started .......................................

693

When the interior lights or

headlights do not illumi-
nate and the hybrid system
cannot be started .................

699

When the horn sounds at a

low volume and the hybrid
system cannot be started .

700

When the horn does not

sound and the hybrid sys-
tem cannot be started .........

701

9-4. If a tire is flat

Precautions for when you

have a flat tire .........................

702

9-5. If a door cannot be opened or

locked

If a key has been lost...............

703

When the doors/windows/

moon roof cannot be op-
erated using an electronic
key...............................................

704

If a door cannot be opened

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

713

If the rear doors cannot be

opened from the inside .......

716

If the back door cannot be

opened.......................................

717

9-6. If the moon roof/sunshade mal-

functions

If the moon roof does not

operate correctly...................

718

9-7. If refueling cannot be per-

formed

If the fuel filler door cannot

be opened ................................

719

9-8. If the plug-in hybrid system can-

not be used normally

If the hybrid battery (trac-

tion battery) of the plug-in
hybrid system cannot be
charged ....................................

720

If the charging connector

cannot be disconnected
from the AC charging inlet

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

724

When a malfunction occurs

during charging.....................

726

649

When tr

ouble arises

What to do if a problem occurs while driving

Using the emergency flashers to warn other drivers

Use the emergency flashers to inform other drivers of the presence of your vehicle
when it is stopped on the road, such as if the vehicle has broke down.
Press the switch.

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

INFORMATION

■

Emergency flashers

●

If the emergency flashers are used for a long time with the hybrid system stopped
(while the "READY" indicator is not illuminated), the 12-volt battery may become
discharged.

●

If any of the SRS airbags deploy (inflate) or in the event of a strong rear impact, the
emergency flashers will turn on automatically.
The emergency flashers will turn off automatically after operating for approximately
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.)

Stopping the vehicle in an emergency

Stop the vehicle using the following procedure only in an emergency, such as if it
becomes impossible to stop the vehicle in the normal way:

WARNING

■

If the hybrid system has to be stopped while driving

Power assist for the steering wheel will be lost, making the steering wheel heavier to turn.
Decelerate as much as possible before stopping the hybrid system.

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.

9-1. What to do if a problem occurs while driving

651

When tr

ouble arises

Change the shift position to N.

●

If the shift position is changed to N:
After slowing down, stop the vehicle in a safe place by the road.
Stop the hybrid system.

●

If the shift position cannot be changed 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 sec-
onds or more, or press it briefly 3 times or more in succession.

Stop the vehicle in a safe place by the road.

WARNING

To restart the hybrid system after performing an emergency shutdown, change the
shift position to N and then press the power switch.

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.

●

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 pressure outside of the vehicle
and then open the door after waiting for the rising water to enter the vehicle, and
exit the vehicle.

9-1. What to do if a problem occurs while driving

652

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

INFORMATION

■

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 not operate, the engine and motor stop, and the
vehicle may not be able to get moving.

■

Using an emergency escape hammer

Laminated glass

is used in the windshield and the windows on this vehicle. Laminated

glass cannot be shattered with an emergency hammer

■

How to distinguish laminated glass

When looking from the cross-sectional view point, laminated glass is two sheets of glass
pasted together.

Laminated glass

Tempered glass

WARNING

■

Caution while driving

Do not drive on roads where the roads may be submerged or the water may be rising.
Otherwise the vehicle may be damaged and cannot move, as well as become flooded
and set adrift, which may lead to death.

Operation of emergency shut off system

When a certain level of impact is detected by an impact sensor, the emergency
shut off system blocks the high voltage current and stops the fuel pump to mini-
mize the risk of electrocution and fuel leakage. If the emergency shut off system
activates, your vehicle will not be able to be restarted. To restart the hybrid system,
contact your Lexus dealer.

* :

If equipped

*1 :

Contact your Lexus dealer or aftermarket accessory manufacturer for further infor-

mation about an emergency hammer.

9-1. What to do if a problem occurs while driving

653

When tr

ouble arises

If a warning is indicated on the meter

If a warning light turns on/flashes

Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessarily
indicate a malfunction in the system. However, if this continues to occur, have the
vehicle inspected by your Lexus dealer.

INFORMATION

■

Warning buzzer

In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

Brake system warning light (warning buzzer)

Condition

Cause / Remedy

(U.S.A.) or

(red) (Canada)

Indicates that:

●

The brake fluid level is low; or

●

The brake system is malfunctioning

Immediately stop the vehicle and contact your Lexus dealer. Con-
tinuing to drive the vehicle may be dangerous.

WARNING

If both the ABS and the brake system warning lights remain on, stop your vehicle in a safe
place immediately and contact your Lexus dealer.
The vehicle will become extremely unstable during braking, and the ABS system may fail,
which could cause an accident resulting in death or serious injury.

Brake system warning light (warning buzzer)

Condition

Cause / Remedy

(yellow)

Indicates a malfunction in:

●

The regenerative braking system;

●

The electronically controlled brake system; or

●

The parking brake

Have the vehicle checked by your Lexus dealer immediately.

9-2. If a warning is indicated on the meter

654

WARNING

High coolant temperature warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on the

multi-information display.

Indicates that the engine coolant temperature is too
high
Immediately stop the vehicle in a safe take the cor-
rective actions for overheating.

Related Links

If your vehicle overheats(P. 747)

Hybrid system overheat warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on the

multi-information display.

Indicates the hybrid system has overheated
Stop the vehicle in a safe place and perform the
necessary actions.

Related Links

If your vehicle overheats(P. 747)

Charging system warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on the

multi-information display.

Indicates a malfunction in the vehicle’s charging
system
Immediately stop the vehicle in a safe place and
contact your Lexus dealer.

9-2. If a warning is indicated on the meter

655

When tr

ouble arises

Low engine oil pressure warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on the

multi-information display.

Indicates that the engine oil pressure is too low
Immediately stop the vehicle in a safe place and
contact your Lexus dealer.

Malfunction indicator lamp

Condition

Cause / Remedy

(U.S.A.) or

(Canada)

Indicates a malfunction in:

●

The hybrid system;

●

The electronic engine control system;

●

The electronic throttle control system; or

Immediately stop the vehicle in a safe place and contact your Lexus
dealer.

INFORMATION

■

If the malfunction indicator lamp comes on while driving

First check the following:

●

Is the fuel tank empty?
If it is, fill the fuel tank immediately.

●

Is the fuel tank cap loose?
If it is, tighten it securely.

The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon as
possible.

SRS warning light

Warning light

Details / Actions

●

The SRS airbag system is malfunctioning

●

The seat belt pretensioner system is malfunctioning

Have the vehicle checked by your Lexus dealer immediately.

9-2. If a warning is indicated on the meter

656

SRS warning light

This warning light indicates problems with the following:

●

Airbag sensor assembly

●

Front impact sensors

●

Side impact sensors (front door)

●

Side impact sensors (front)

●

Front passenger occupant classification sensors

●

Driver’s seat position sensor

●

Driver’s seat belt buckle switch

●

Front passenger’s seat belt buckle switch

●

"AIR BAG ON" indicator light

●

"AIR BAG OFF" indicator light

●

Seat belt pretensioners

●

Air bags

●

Interconnecting wiring and power sources.

Related Links

SRS airbags(P. 551)

ABS warning light (warning buzzer)

Condition

Cause / Remedy

(U.S.A.) or

(Canada)

Indicates a malfunction in:

●

The ABS; or

●

The brake assist system

Have the vehicle checked by your Lexus dealer immediately.

WARNING

9-2. If a warning is indicated on the meter

657

When tr

ouble arises

Inappropriate pedal operation warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates

on the multi-information

display.

When a buzzer sounds:
Indicates a malfunction in:

●

The Brake Override System

●

The Drive-Start Control

Have the vehicle checked by your Lexus dealer imme-
diately.

When a buzzer sounds:
Indicates that the shift position was changed and
Drive-Start Control was operated while depressing
the accelerator pedal.
Momentarily release the accelerator pedal.

When a buzzer sounds:
PKSB (Parking Support Brake)

has operated

Follow the instructions displayed on the multi-informa-
tion display.

When a buzzer does not sound:
Indicates that the accelerator and brake pedals are be-
ing depressed simultaneously, and the Brake Override
System is operating.
Release the accelerator pedal and depress the brake
pedal.

Electric power steering system warning light (warning buzzer)

Condition

Cause / Remedy

(red/yellow)

Indicates a malfunction in the EPS (Electric Power Steering) system
Have the vehicle checked by your Lexus dealer immediately.

* :

If equipped

9-2. If a warning is indicated on the meter

658

INFORMATION

■

Electric power steering system warning light (warning buzzer)

When the 12-volt battery charge becomes insufficient or the voltage temporarily drops,
the electric power steering system warning light may come on and the warning buzzer
may sound.

WARNING

When the electric power steering system warning light comes on yellow, the assist to
the power steering is restricted. When the light comes on red, the assist to the power
steering is lost and handling operations of the steering wheel become extremely heavy.
When steering wheel operations are heavier than usual, grip the steering wheel firmly
and operate it using more force than usual.

Low fuel level warning light

Condition

Cause / Remedy

Indicates that remaining fuel is approximately 2.3 gal. (8.5 L, 1.9 Imp.
gal.) or less
Refuel the vehicle.

Driver’s and front passenger’s seat belt reminder light (warning buzzer)

Condition

Cause / Remedy

Warns the driver and/or front passenger to fasten their seat belts
Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.

INFORMATION

■

Driver’s and front passenger’s seat belt warning buzzer

●

Driver’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to alert the driver that his or her seat
belt is not fastened. Once the power switch is turned to ON, the buzzer sounds. If the
seat belt is still unfastened, the buzzer sounds intermittently for a certain period of time
after the vehicle reaches a certain speed.

●

Front passenger’s seat belt warning buzzer:

9-2. If a warning is indicated on the meter

659

When tr

ouble arises

The front passenger’s seat belt warning buzzer sounds to alert the front passenger that
his or her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds
intermittently for a certain period of time after the vehicle reaches a certain speed.

■

Front passenger detection sensor, seat belt reminder and warning buzzer

●

If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a
passenger is not sitting in the seat.

●

If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.

Rear passengers’ seat belt reminder light (warning buzzer)

Condition

Cause / Remedy

(Vehicles without a head-up display)

(Vehicles with a head-up display)

Warns the rear passengers to fasten their
seat belts
Fasten the seat belt.

INFORMATION

■

Rear passengers’ seat belt warning buzzer

The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that
his or her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds
intermittently for a certain period of time, after the seat belt is fastened and unfastened
and the vehicle reaches a certain speed.

Tire pressure warning light (warning buzzer)

Condition

Cause / Remedy

When the light comes on after blinking for approximately 1 minute (a
buzzer does not sounds):
Malfunction in the tire pressure warning system
Have the system checked by your Lexus dealer.

9-2. If a warning is indicated on the meter

660

Condition

Cause / Remedy

When the light comes on (a buzzer sounds):
Low tire inflation pressure from natural causes
After the temperature of the tires has lowered sufficiently, check the
inflation pressure of each tire and adjust them to the specified level.

When the light comes on (a buzzer sounds):
Low tire inflation pressure from flat tire
Immediately stop the vehicle in a safe place and perform the necessa-
ry actions

INFORMATION

■

If the tire pressure warning light comes on

Inspect the tires to check if a tire is punctured.

●

If a tire is punctured:

→

P.702

●

If none of the tires are punctured: Turn the power switch off then turn it to ON. Check
if the tire pressure warning light comes on or blinks.

•

If the tire pressure warning light blinks for approximately 1 minute then stays on
There may be a malfunction in the tire pressure warning system. Have the vehicle
inspected by your Lexus dealer immediately.

•

If the tire pressure warning light comes on
After the temperature of the tires has lowered sufficiently, check the inflation
pressure of each tire and adjust them to the specified level.
If the warning light does not turn off even after several minutes have elapsed, check
that the inflation pressure of each tire is at the specified level and perform the tire
inflation pressure setting procedure.
If the warning light does not turn off even after several minutes have elapsed since
performing the tire inflation pressure setting procedure, have the vehicle inspected
by your Lexus dealer immediately.

■

The tire pressure warning light may come on due to natural causes

The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).

9-2. If a warning is indicated on the meter

661

When tr

ouble arises

WARNING

■

If the tire pressure warning light comes on

Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.

●

Decelerate to the lowest appropriate speed as soon as possible. Do not drive over 50
mph (80 km/h).

●

Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.

●

If the tire pressure warning light comes on even after tire inflation pressure adjustment,
it is probable that you have a flat tire. Have the flat tire replaced by the nearest Lexus
dealer.

●

Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.

■

If a blowout or sudden air leakage should occur

The tire pressure warning system may not activate immediately.

■

Maintenance of the tires

Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recommended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load information label], you should determine the proper
tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when one or more of your tires is significantly
under-inflated. Accordingly, when the low tire pressure telltale (tire pressure warning
light) illuminates, you should stop and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a significantly under-inflated tire causes the tire
to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and
tire tread life, and may affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to maintain correct tire pressure, even
if under-inflation has not reached the level to trigger illumination of the TPMS low tire
pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS (tire
pressure warning system) malfunction indicator is combined with the low tire pressure
telltale (tire pressure warning light). When the system detects a malfunction, the telltale
will flash for approximately one minute and then remain continuously illuminated. This

9-2. If a warning is indicated on the meter

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Lexus NX450H+ (2024 year). Manual in english - page 20