Lexus RZ450E (2023 year). Manual in english

435

8-4. Inspection of consumables

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Heater coolant reservoir (



P.435)

Washer fluid tank (



P.440)

Power control unit coolant reservoir (



P.436)

12-volt battery (



P.438)

Brake fluid reservoir (



P.437)

Fuse box (



P.560)

Radiator (



P.436)

Condenser (



P.436)

Electric cooling fan

The coolant level is satisfactory if it is
between the “MAX” and “MIN” lines
on the reservoir when the EV system is
cold.

Reservoir cap
“MAX” line

Motor compartment

Motor compartment components

A
B
C
D

E
F

Checking the heater coolant

A
B

436

8-4. Inspection of consumables

“MIN” line

If the level is on or below the “MIN” line,
add coolant up to the “MAX” line. (P.557)

■

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.
“Toyota Super Long Life Coolant” is a mix-

ture of 50% coolant and 50% deionized

water. (Minimum temperature: -31°F

[-35°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, 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.

The coolant level is satisfactory if it is
between the “MAX” and “MIN” lines
on the reservoir when the EV system is
cold.

WARNING

■

When the heater system is hot

Do not remove the heater coolant reser-

voir caps.

The heater 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

WARNING

■

When the EV system is hot

Do not touch the radiator or condenser

as they may be hot and cause serious

injuries, such as burns.

■

When the electric cooling fan are

operating

Do not touch the motor compartment.

With the power switch in ON, the elec-

tric cooling fan may automatically start to

run if the air conditioning is on and/or the

coolant temperature is high. Be sure the

power switch is OFF when working near

the electric cooling fan or radiator grille.

Checking the power control unit
coolant

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8-4. Inspection of consumables

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Reservoir cap
“MAX” line
“MIN” line

If the level is on or below the “MIN” line,
add coolant up to the “MAX” line.

■

Coolant selection

In order to ensure maximum performance

of the traction battery cooling system and

limit risks of battery short-circuit and other

damage to your vehicle, Lexus recom-

mends using “Toyota Genuine Traction Bat-

tery Coolant” or similar high-quality

ethylene glycol-based, low electric conduc-

tivity coolant, non-amine and non-borate

coolant with azole additives.
Lexus cannot guarantee that the use of a

product other than “Toyota Genuine Trac-

tion Battery Coolant” will prevent risks of

battery short-circuit or other damage.
Never use water as it will cause damage.
Do not reuse coolant that has been

removed from the radiator.
For more details about coolant, contact

your Lexus dealer.

■

If the coolant level drops within a short

time of replenishing

Visually check the hoses, heater 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.

■

Checking fluid level

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

Reservoir cap
“MAX” line

WARNING

■

When the EV system is hot

Do not remove the power control unit

coolant reservoir caps.

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 and adding the brake
fluid

438

8-4. Inspection of consumables

“MIN” line

■

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
FMVSS No.116 DOT 4 or SAE J1704
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.

Check the 12-volt battery as follows.

■

12-volt battery exterior

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

■

Checking 12-volt battery fluid

Check that the level is between the
“UPPER LEVEL” and “LOWER
LEVEL” lines.

“UPPER LEVEL” line
“LOWER LEVEL” line

If the fluid level is at or below the “LOWER
LEVEL” line, add distilled water.

■

Adding distilled water

Remove the vent plug.

Add distilled water.

If the “UPPER LEVEL” cannot be seen,

check the fluid level by looking directly at

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 dis-

comfort, 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.

Checking the 12-volt battery

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8-4. Inspection of consumables

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the cell.

Put the vent plug back on and close
it securely.

■

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 EV system may not start. Follow the

procedure below to initialize the system.

Shift the shift position to P.

Open and close any of the doors.

Restart the EV 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 EV system with the power

switch in ACC. The EV system may not

start with the power switch turned off.

However, the EV system will operate nor-

mally 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 EV system will not start even after
multiple attempts at all the methods above,
contact your Lexus dealer.

WARNING

■

Chemicals in the 12-volt battery

Batteries contain poisonous and corro-

sive sulfuric acid and may produce

hydrogen gas which is flammable and

explosive. To reduce the risk of death or

serious injury, take the following precau-

tions 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.

440

8-4. Inspection of consumables

If washer fluid does not spray from any
of the washers or “Windshield Washer
Fluid Low” is displayed on the
multi-information display, the washer
fluid bottle may be empty. Add washer
fluid.

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 there is insufficient 12-volt bat-

tery fluid

Do not use if there is insufficient fluid in

the 12-volt battery. There is a possible

danger that the 12-volt battery may

explode.

NOTICE

■

When recharging the 12-volt battery

Never recharge the 12-volt battery while

the EV system is operating. Also, be sure

all accessories are turned off.

■

When adding distilled water

Avoid overfilling. Water spilled during

12-volt battery recharging may cause

corrosion.

Adding washer fluid

WARNING

Do not add washer fluid when the EV

system is hot or operating.

As washer fluid contains alcohol, it may

catch fire if spilled on the motor, 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 bot-

tle.

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8-4. Inspection of consumables

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■

When installing the filter cover

Slide the recessed part

of the filter

cover on the upper surface of the upper fil-
ter case

as shown in the figure, and

attach it so that it is lifted toward the inser-

tion part of the cover attachment.

■

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.

●

If air flow from the vents decreases dra-

matically, the air conditioning filter may

be clogged. Check the filter and replace

it if necessary.

(For scheduled maintenance information,
please refer to the “Owner’s Manual Sup-
plement” or “Scheduled Maintenance”.)

●

If air fresheners, etc. are used inside the

vehicle, the service life of the deodorizing

function of the air conditioning filter with

deodorizing function may be reduced

significantly. If odors from the air condi-

tioning system become a concern,

replace the filter.

■

If air flow from the vents decreases dra-

matically

The filter may be clogged. Check the filter

and replace if necessary.

Turn the power switch off.

Confirm that the charging connector is not

connected. Also, do not use the Remote

Air Conditioning System during the proce-

Air conditioning filter main-
tenance

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

WARNING

Observe the following precautions. Fail-

ure to do so may result in the air condi-

tioning system operating during the

procedure, possibly resulting in injury.

●

Check that the charging connector is

not connected

●

Do not use the Remote Air Condition-

ing System

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 dam-

age to the system.

●

The filter is replaceable. When clean-

ing the filter, do not clean with water or

an air gun.

■

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.

Replacing the air conditioning
filter

444

8-5. Tire maintenance

8-5.Tire 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.

Tire maintenance

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

NOTICE

Take particular care when driving on

uneven rough roads with cracks and pot-

holes.

These conditions may cause loss of tire

inflation pressure, reducing the cushion-

ing ability of the tires. Driving on rough

roads may also cause damage to the tires

themselves, as well as the vehicle’s

wheels and body.

Tire inspection items

WARNING

■

When inspecting or replacing the

tires

Observe the following precautions.

Failure to do so may lead to damage to

the drivetrain or unstable handling.

●

Do not mix tires of different makes,

models or tread patterns. Also, do not

mix tires of remarkably different tread-

wear.

●

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 anything if a tire that has

been repaired using the emergency

tire puncture repair kit is installed. The

load on the tire may cause unexpected

damage to the tire.

NOTICE

If tire inflation pressure becomes low

while driving, do not continue driving.

Otherwise the tire or wheel may be dam-

aged.

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8-5. Tire maintenance

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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.571)

■

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.

A
B
C

446

8-5. Tire maintenance

●

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.183)

■

If the tread on snow tires wears down

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is

lost.

The tire pressure warning system of
this vehicle adopts a 2-type warning
system. (



P.477)



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



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

Operation of the tire pres-
sure warning system

Your vehicle is equipped with a tire
pressure warning system that uses
tire pressure warning valves and
transmitters to detect low tire infla-
tion pressure before serious prob-
lems arise.

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8-5. Tire maintenance

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

Center display



When “Adjust Pressure” is dis-
played (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 (Emergency
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
detect sudden tire ruptures (bursting, etc.).



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



P.255)

■

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 pres-
sure 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 conditions,
the display may be corrected by changing
the location of the vehicle as the radio
wave conditions may change.

448

8-5. Tire maintenance

●

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.451)

■

When replacing the 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 min-

utes, the tire pressure warning light blinks

for 1 minute and stays on to indicate a sys-

tem malfunction.

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.

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

Start the EV 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”.

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, 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.

■

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.

Registration of the position of
each wheel

It is necessary to register the posi-
tion of each wheel after performing
a tire rotation.

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8-5. Tire maintenance

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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-

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 approxi-
mately 15 minutes and then drive the vehi-
cle again.

●

If the vehicle is reversed during wheel

position registration, all data collected

until then will be cleared. Perform driving

again.

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.455)

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-

Setting the tire pressure

450

8-5. Tire maintenance

forming tire pressure setting. The tire
pressure warning system operates
based on this tire inflation pressure.

Start the EV 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. (



P.455)

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

multi-information display.

■

If the tire inflation pressure cannot be

set easily

●

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

the above procedure, contact your Lexus

dealer.

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 EV 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

Setting by selecting a specified
tire inflation pressure

Setting using the current tire
inflation pressure

WARNING

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.

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message indicating that setting has been

completed will be displayed on the

multi-information display.

■

Warning performance of the tire pres-

sure warning system

●

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

●

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, the tire inflation pressure set-

ting procedure can be completed in 2 or

3 minutes.

●

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

the above procedure, contact your Lexus

dealer.

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.



ID codes can be registered by your-
self, but depending on the driving
conditions and driving environ-
ment, registration may take some
time to complete.



When using a wheel set which all of
the ID codes have already been reg-
istered, the wheel set can be
changed in a short amount of time.
(



P.453)

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 EV 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.

Registering ID codes

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8-5. Tire maintenance

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.

If the tire pressure warning light does not

blink 3 times when starting ID code regis-

tration procedure, the procedure may not

have started. Perform the procedure again

from the beginning.

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.

■

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.

■

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

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driving for 1 hour or more, perform the ID

code registration procedure again from

the beginning.

●

If the ID codes cannot be registered even

when performing the above procedure,

contact your Lexus dealer.

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.449)

If the specified tire inflation pressure is the

same, it will not be necessary to perform

the tire inflation pressure setting proce-

dure.

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



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.451)



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. (



P.453)

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

Canceling ID code registration

Selecting wheel set

Your vehicle is equipped with a tire
pressure warning system with a
function to register two sets of ID
codes. This allows for registration of
a second wheel set, for example a
winter set.

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8-5. Tire maintenance

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.449)

If the specified tire inflation pressure is the

same, it will not be necessary to perform

the tire inflation pressure setting proce-

dure.



P.448)

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



Reduced electricity consumption

Checking tire inflation pres-
sure

You should check tire inflation pres-
sure 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 dam-

age

●

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 infla-

tion pressure, make sure to install the tire

valve caps.

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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efficiency



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 accu-
rate cold tire inflation pressure reading.

●

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.

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



P.564)

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.

Checking the specified tire infla-
tion pressure

Tire inflation pressure inspec-
tion and adjustment procedure

A
B

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8-5. Tire 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.448)

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

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 acci-

dent, 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 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.

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8-5. Tire maintenance

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Observe the following precautions
when handling the aluminum wheels.



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



When 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 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.

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 EV system.

■

Jack and tools

As your vehicle is equipped with an emer-

gency tire puncture repair kit, 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

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

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, special-
ized 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

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8-5. Tire maintenance

Tool bag (if equipped)

• Jack (if equipped)
• Jack handle (if equipped)
• Wheel bolt wrench (if equipped)

Towing eyelet
Guide pin (if equipped)
Wheel bolt socket (if equipped)

Remove the deck board.

Storage position of the tools and jack

WARNING

Improper use of the tire jack may cause the vehicle to fall. Therefore, observe the follow-

ing 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.

Taking out the jack

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Take out the jack from the tool bag.

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 (approxi-
mately one turn).

Turn the tire jack portion by
hand and place the top of the jack
in the position shown in the illustra-
tion.

Removing a tire

WARNING

■

Precautions for replacing a tire

●

Do not try to remove the wheel orna-

ment 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 (vehicles with

power back door)

When replacing a tire, make sure to dis-

able the power back door. If not disabled,

the power back door may operate unin-

tentionally, and hands or fingers may be

caught and injured. (



P.585)

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8-5. Tire maintenance



Front



Rear

Install the wheel bolt socket to the
jack handle.

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

WARNING

Make sure the jack is positioned properly

in the jack point.

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 EV system or drive the

vehicle while the vehicle is supported

by the jack.

●

Do not raise the vehicle while some-

one 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.

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

Turn the guide pin clockwise to tighten it

until it stops.

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.

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 tire
with the guide pin, and set the tire
on the guide pin.

Align the center hole of the wheel with the

center of the hub and securely set the tire

so that the wheel and hub contact surfaces

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.

Installing the tire

464

8-5. Tire maintenance

are touching.

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

Do not use the wheel bolt socket for any-

thing other than loosely tightening the

wheel bolts by hand.

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.

WARNING

Observe the following precautions. Fail-

ure 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 special-

ized 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 fac-

tory-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 dam-
age to the wheel bolts, the threaded por-
tion the wheel bolts install to

, or the

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

●

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.

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

Lower the vehicle.

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)

Stow the jack and all tools.

WARNING

●

Do not install the wheel ornament if it is

damaged, as it may fly off the wheel

while the vehicle is being driven.

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.

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.

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 tight-

ening 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.

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8-5. Tire maintenance

Adjustment bolt A
Adjustment bolt B

Before checking the headlight aim,
confirm the following.



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 sev-
eral times after being parked.

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

Remember the turning direction
and the number of turns.

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

Checking the headlight aim

Adjusting the headlight aim

A
B

Lexus RZ450E (2023 year). Manual in english - page 14