Lexus UX 300e (2023 year). Manual in english

445

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises



Shift the shift position to P.



Stop the EV system.



Turn on the emergency flashers.



Check the degree of the tire dam-
age.

A tire should only be repaired with the
emergency tire puncture repair kit if the
damage is caused by a nail or screw pass-
ing through the tire tread.
• Do not remove the nail or screw from

the tire. Removing the object may widen
the opening and make emergency
repair with the repair kit impossible.

• To avoid sealant leakage, move the vehi-

cle until the area of the puncture, if
known, is positioned at the top of the tire.

A flat tire that cannot be repaired with

the emergency tire puncture repair kit

In the following cases, the tire cannot be

repaired with the emergency tire puncture

repair kit. Contact any authorized Lexus

retailer or Lexus authorized repairer, or any

reliable repairer.

When the tire is damaged due to driving

without sufficient air pressure

When there are any cracks or damage at

any location on the tire, such as on the

side wall, except the tread

When the tire is visibly separated from

the wheel

When the cut or damage to the tread is 4

mm (0.16 in.) long or more

When the wheel is damaged

When two or more tires have been punc-

tured

When more than one sharp objects such

as nails or screws have passed through

the tread on a single tire

447

8-2. Steps to take in an emergency

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en

troubl
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ises

Compressor

Air pressure gauge

Compressor switch

Power plug

Hose

Air release cap

Emergency tire puncture repair kit

The sealant stored in the emergency tire

puncture repair kit can be used only once

to temporarily repair a single tire. If the

sealant in the bottle and other parts of the

kit have been used and need to be

replaced, contact any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

The compressor can be used repeatedly.

The sealant can be used when the outside

temperature is from -30°C (-22°F) to

60°C (140°F).

The kit is exclusively designed for size

and type of tires originally installed on

your vehicle. Do not use it for tires that a

different size than the original ones, or for

any other purposes.

If the sealant gets on your clothes, it may

stain.

If the sealant adheres to a wheel or the

surface of the vehicle body, the stain may

not be removable if it is not cleaned at

once. Immediately wipe away the sealant

with a wet cloth.

During operation of the repair kit, a loud

operation noise is produced. This does

not indicate a malfunction.

Do not use to check or to adjust the tire

pressure.

Note for checking the emergency tire

puncture repair kit

Check the sealant expiry date occasion-

ally. The expiry date is shown on the bot-

tle.

Do not use sealant whose expiry date has

already passed. Otherwise, repairs con-

ducted using the emergency tire punc-

ture repair kit may not be performed

properly.

The sealant has a limited life span. The

expiry date is marked on the bottle. The

sealant should be replaced before the

expiry date. Contact any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer for

replacement.

A
B
C
D

WARNING

If you have a flat tire

Driving even a short distance with a flat

tire can damage the tire and the wheel

beyond repair.
Driving with a flat tire may cause a cir-

cumferential groove on the side wall. In

such a case, the tire may explode when

using a repair kit.

Caution while driving

Store the repair kit in the luggage

compartment. Injuries may result in the

event of an accident or sudden brak-

ing.

448

8-2. Steps to take in an emergency

Pull the lever upwards and open
the deck board.

Unhook the string on the backside
of the deck board.

Attach the string to the hook on the
back door.

Take out the emergency tire punc-
ture repair kit.

Take out the repair kit from the
plastic bag.

Attach the sticker enclosed with the bottle

on the specified locations. (See step

WARNING

The repair kit is exclusively only for

your vehicle. Do not use repair kit on

other vehicles, which could lead to an

accident causing death or serious

injury.

Do not use repair kit for tires that are

different size than the original ones, or

for any other purpose. If the tires have

not been completely repaired, it could

lead to an accident causing death or

serious injury.

Precautions for use of the sealant

Ingesting the sealant is hazardous to

your health. If you ingest sealant, con-

sume as much water as possible, then

immediately consult a doctor.

If sealant gets in eyes or adheres to

skin, immediately wash it off with

water. If discomfort persists, consult a

doctor.

Taking out the emergency tire
puncture repair kit

Emergency repair procedure

450

8-2. Steps to take in an emergency

Extend the hose. Remove the air
release cap from the hose.

You will use the air release cap again.

Therefore keep it in a safe place.

Connect the hose to the valve.

Screw the end of the hose clockwise as far

as possible.

Make sure that the compressor
switch is off.

Connect the power plug to the
power outlet socket. (



P.372)

Attach the sticker provided with
the tire puncture repair kit to a

position easily seen from the
driver’s seat.

Check the specified tire inflation
pressure.

Tire inflation pressure is specified on the

label as shown. (



P.474)



Left-hand drive vehicles



Right-hand drive vehicles

Start the EV system. (



P.224)

451

8-2. Steps to take in an emergency

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ises

To inject the sealant and inflate the
tire, turn the compressor switch on.

Inflate the tire until the recom-
mended pressure is reached.

The sealant will be injected and the
pressure will spike to between 300
kPa (3.0 kgf/cm

or bar, 44 psi)

and 400 kPa (4.0 kgf/cm

or bar,

58 psi), then gradually decrease.

The air pressure gauge will display
the actual tire inflation pressure
about 1 to 5 minutes after the

switch is turned on.

• Turn the compressor switch off and then

check the tire inflation pressure. Being
careful not to over inflate, check and
repeat the inflation procedure until the
specified tire inflation pressure is
reached.

• The tire can be inflated for about 5 to 20

minutes (depending on the outside tem-
perature). If the tire inflation pressure is
still lower than the specified point after
inflation for 25 minutes, the tire is too
damaged to be repaired. Turn the com-
pressor switch off and contact any
authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.

• If the tire inflation pressure exceeds the

specified air pressure, let out some air to
adjust the tire inflation pressure.
(



P.453)

With the compressor switch off,
pull out the power plug from the
power outlet socket and then dis-
connect the hose from the valve on
the tire.

Some sealant may leak when the hose is

removed.

Install the valve cap onto the valve
of the emergency repaired tire.

452

8-2. Steps to take in an emergency

Attach the air release cap to the
end of the hose.

If the air release cap is not attached, the

sealant may leak and the vehicle may get

dirty.

Temporarily store the bottle in the
luggage compartment while it is
connected to the compressor.

To spread the liquid sealant evenly
within the tire, immediately drive
safely for about 5 km (3 miles)
below 80 km/h (50 mph).

After driving, stop your vehicle in a
safe place on a hard, flat surface
and reconnect the repair kit.

Remove the air release cap from the hose

before reconnecting the hose.

Turn the compressor switch on and
wait for several seconds, then turn

it off. Check the tire inflation pres-
sure.

If the tire inflation pressure is under
130 kPa (1.3 kgf/cm

or bar, 19

psi): The puncture cannot be
repaired. Contact any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

If the tire inflation pressure is 130
kPa (1.3 kgf/cm

or bar, 19 psi) or

higher, but less than the specified
air pressure: Proceed to step

If the tire inflation pressure is the
specified air pressure (



P.474):

Proceed to step

Turn the compressor switch on to
inflate the tire until the specified air
pressure is reached. Drive for
about 5 km (3 miles) and then per-
form step

Attach the air release cap to the
end of the hose.

If the air release cap is not attached, the

sealant may leak and the vehicle may get

453

8-2. Steps to take in an emergency

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dirty.

Store the bottle in the luggage
compartment while it is connected
to the compressor.

Taking precautions to avoid sud-
den braking, sudden acceleration
and sharp turns, drive carefully at
under 80 km/h (50 mph) to the
nearest authorized Lexus retailer
or Lexus authorized repairer, or
any reliable repairer that is less than
100 km (62 miles) away for tire
repair or replacement.

For repair and replacement of a tire or dis-

posal of the tire puncture repair kit, contact

any authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.
When having the tire repaired or replaced,

make sure to tell any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer that the sealant is

injected.

If the tire is inflated to more than the

specified air pressure

Disconnect the hose from the valve.

Install the air release cap to the end of

the hose and push the protrusion on the

air release cap into the valve to let some

air out.

Disconnect the hose from the valve,

remove the air release cap from the

hose and then reconnect the hose.

Turn the compressor switch on and wait

for several seconds, then turn it off.

Check that the air pressure indicator

shows the specified air pressure is

reached. (



P.474)

If the air pressure is under the desig-

nated pressure, turn the compressor

switch on again and repeat the inflation

procedure until the specified air pres-

sure is reached.

After a tire is repaired with the emer-

gency tire puncture repair kit

The tire pressure warning valve and

transmitter should be replaced.

Even if the tire inflation pressure is at the

recommended level, the tire pressure

warning light may come on/flash.

WARNING

When fixing the flat tire

Stop your vehicle in a safe and flat

area.

Do not touch the wheels or the area

around the brakes immediately after

the vehicle has been driven. After the

vehicle has been driven, the wheels

and the area around the brakes may

be extremely hot. Touching these

areas with hands, feet or other body

parts may result in burns.

454

8-2. Steps to take in an emergency

WARNING

Connect the valve and hose securely

with the tire installed on the vehicle.

If the hose is not properly connected to
the valve, air leakage may occur as seal-
ant may be sprayed out.

If the hose comes off the valve while

inflating the tire, there is a risk that the

hose will move abruptly due to air

pressure.

After inflation of the tire has com-

pleted, the sealant may splatter when

the hose is disconnected or some air is

let out of the tire.

Follow the operation procedure to

repair the tire. If the procedure is not

followed, the sealant may spray out.

Keep back from the tire while it is

being repaired, as there is a chance of

it bursting while the repair operation is

being performed. If you notice any

cracks or deformation of the tire, turn

off the compressor switch and stop the

repair operation immediately.

The repair kit may overheat if oper-

ated for a long period of time. Do not

operate the compressor continuously

for more than 40 minutes.

Parts of the repair kit become hot

during operation. Be careful handling

the repair kit during and after opera-

tion. Do not touch the metal part con-

necting the bottle and the compressor.

It will be extremely hot.

Do not attach the vehicle speed warn-

ing sticker to an area other than the

one indicated. If the sticker is attached

to an area where an SRS airbag is

located, such as the pad of the steering

wheel, it may prevent the SRS air bag

from operating properly.

Driving to spread the liquid sealant

evenly

Observe the following precautions to

reduce the risk of accidents.
Failing to do so may result in a loss of

vehicle control and cause death or seri-

ous injury.

Drive the vehicle carefully at a low

speed. Be especially careful when

turning and cornering.

If the vehicle does not drive straight or

you feel a pull through the steering

wheel, stop the vehicle and check the

following:

• Tire condition. The tire may have sepa-

rated from the wheel.

• Tire inflation pressure. If the tire infla-

tion pressure is 130 kPa (1.3 kgf/cm

or bar, 19 psi) or less, the tire may be

severely damaged.

NOTICE

When performing an emergency

repair

Perform the emergency repair without

removing the nail or screw that has

punctured the tread of the tire. If the

object that has punctured the tire is

removed, repair by the emergency tire

puncture repair kit may not be possi-

ble.

The repair kit is not waterproof. Make

sure that the repair kit is not exposed

to water, such as when it is being used

in the rain.

Do not put the repair kit directly onto

dusty ground such as sand at the side

of the road. If the repair kit vacuums up

dust, etc., a malfunction may occur.

Make sure the sealant bottle of the

repair kit is in a vertical position. The

repair kit does not operate properly

when it is laid.

455

8-2. Steps to take in an emergency

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ises

One of the following may be the cause
of the problem:



The charging cable may be con-
nected to the vehicle. (



P.114)



The electronic key may not be func-
tioning properly.

(



P.458)



The traction battery may be com-
pletely discharged. Charge the
traction battery. (



P.109)



There may be a malfunction in the
immobilizer system.

(



P.71)



There may be a malfunction in the
shift control system.

(



P.226,

443)



There may be a malfunction in the
steering lock system.



The EV system may be malfunction-
ing due to an electrical problem

NOTICE

Precautions for the emergency tire

puncture repair kit

The repair kit power source should be

12 V DC suitable for vehicle use. Do

not connect the repair kit to any other

source.

Place the repair kit in a storage to pre-

vent it from being exposed to dirt or

water.

Store the repair kit in the luggage

compartment out of reach of children.

Do not disassemble or modify the

repair kit. Do not subject parts such as

the air pressure indicator to impacts.

This may cause a malfunction.

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 any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer or other

qualified service shop as soon as possi-

ble. After use of liquid sealant, make sure

to replace the tire pressure warning

valve and transmitter when repairing or

replacing the tire. (



P.400)

If the EV system will not start

Reasons for the EV system not
starting vary depending on the situ-
ation. Check the following and per-
form the appropriate procedure:

Contact any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer if
the problem cannot be repaired, or
if repair procedures are unknown.

The EV system will not start even
though the correct starting pro-
cedure is being followed.
(



P.224)

456

8-2. Steps to take in an emergency

such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the EV system. (



P.456)



There is a possibility that the tem-
perature of the traction battery is
extremely low (approximately
below -30°C [-22°F]). (



P.82,

225)

: It may not be possible to shift the shift

position from P.

One of the following may be the cause
of the problem:



The 12-volt battery may be dis-
charged. (



P.461)



The 12-volt battery terminal con-
nections may be loose or corroded.
(



P.394)

One of the following may be the cause
of the problem:



One or both of the 12-volt battery
terminals may be disconnected.
(



P.394)



The 12-volt battery may be dis-
charged. (



P.461)

Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable
repairer if the problem cannot be repaired,
or if repair procedures are unknown.

When the EV system does not start,
the following steps can be used as an
interim measure to start the EV system
if the power switch is functioning nor-
mally.
Do not use this starting procedure
except in cases of emergency.

Set the parking brake.

Turn the power switch to ACC.

Press and hold the power switch for
about 15 seconds while depressing
the brake pedal firmly.

Even if the EV system can be started
using the above steps, the system may
be malfunctioning. Have the vehicle
inspected by any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer.

The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.

The interior lights and head-
lights do not turn on, or the horn
does not sound.

Emergency start function

457

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

AC charging port lid

Remove the cover inside the lug-
gage compartment by inserting a
flathead screwdriver.

When removing the cover, to prevent

damage, cover the tip of the screwdriver

with a rag.

Pull the lever (white).

If you lose your keys

New genuine mechanical keys can
be made by any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer
using another mechanical key and
the key number stamped on your
key number plate. Keep the plate in
a safe place such as your wallet, not
in the vehicle.

NOTICE

When an electronic key is lost

If the electronic key remains lost, the risk

of vehicle theft increases significantly.

Visit any authorized Lexus retailer or

Lexus authorized repairer, or any reli-

able repairer immediately with all

remaining electronic keys and the card

key (if equipped) that were provided with

your vehicle.

If the charging port lids can-
not be opened

If the charging port lids cannot be
opened when using the normal pro-
cedure, the following procedure
can be used to open the charging
port lids.

Opening the charging port lids

458

8-2. Steps to take in an emergency

DC charging port lid

Remove the cover inside the lug-
gage compartment by inserting a
flathead screwdriver.

When removing the cover, to prevent

damage, cover the tip of the screwdriver

with a rag.

Pull the lever (black).

When the electronic key does not work

properly

Make sure that the smart entry & start

system has not been deactivated using

the Remote Touch or at any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer. If it is

off, turn the function on.

Check if battery-saving mode is set. If it is

set, cancel the function. (



P.197)

Unlocking the driver’s door

Use the mechanical key to perform the
following operations. (



P.176)

If the electronic key does not
operate properly

If communication between the
electronic key and vehicle is inter-
rupted (



P.197) or the electronic

key cannot be used because the
battery is depleted, the smart entry
& start system and wireless remote
control cannot be used. In such
cases, the doors can be opened and
the EV system can be started by fol-
lowing the procedure below.

NOTICE

In case of a smart entry & start system

malfunction or other key-related

problems

Take your vehicle with all the electronic

keys provided with your vehicle, includ-

ing the card key, to any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

Locking and unlocking the
driver’s door

459

8-2. Steps to take in an emergency

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en

troubl
e ar
ises

Insert the mechanical key while
pulling on the driver’s door handle.

Unlock the door.

Remove the key, return the handle,
and then pull the handle again.

Locking the driver’s door

With the door open, push down the
inside lock button.

Close the door while pulling the
door handle.

Key linked functions

The opening and closing of the power win-

dows and moon roof (if equipped) can be

linked to key operation by a customized

setting.

Closes the windows and moon roof
(turn and hold)

Opens the windows and moon roof
(turn and hold)

WARNING

When using the mechanical key and

operating the power windows or

moon roof (if equipped)

Operate the power window or moon

roof after checking to make sure that

there is no possibility of any passenger

having any of their body parts caught in

the window or moon roof.

Also, do not allow children to operate the

wireless remote control or mechanical

key. It is possible for children and other

passengers to get caught in the power

window or moon roof.

460

8-2. Steps to take in an emergency

Depress the brake pedal.

Touch the Lexus emblem side of
the electronic key to the power
switch.

When the electronic key is detected, a

buzzer sounds and the power switch will

turn to ON.

When the smart entry & start system is

deactivated in customization setting, the

power switch will turn to ACC.

Firmly depress the brake pedal and
check that

is shown on the

multi-information display.

Press the power switch.

In the event that the EV system still cannot

be started, contact any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

Stopping the EV system

Set the parking brake, shift the shift position

to P and press the power switch as you nor-

mally do when stopping the EV system.

Electronic key battery

As the above procedure is a temporary

measure, it is recommended that the elec-

tronic key battery be replaced immediately

when the battery is depleted. (



P.414)

Alarm (if equipped)

Using the mechanical key to lock the doors

will not set the alarm system.

If a door is unlocked using the mechanical

key when the alarm system is set, the alarm

may be triggered. (



P.73)

Changing power switch modes

Release the brake pedal and press the

power switch in step

above.

The EV system does not start and modes

will be changed each time the switch is

pressed. (



P.227)

Starting the EV system

461

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

If you have a set of jumper (or booster)
cables and a second vehicle with a 12-
volt battery, you can jump start your
vehicle by following the steps below.

Confirm that the electronic key is
being carried.

When connecting the jumper (or booster)

cables, depending on the situation, the

alarm may activate and the doors may

lock. (



P.74)

Open the hood (



P.389).

Open the positive (+) battery ter-
minal cover while pushing the side

of the cover as shown in the illustra-
tion.

If the 12-volt battery is dis-
charged

The following procedures may be
used to start the EV system if the
vehicle’s 12-volt battery is dis-
charged.
You can also call any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

Restarting the EV system

462

8-2. Steps to take in an emergency

Connect a positive jumper cable clamp to

on your vehicle and connect the

clamp on the other end of the positive cable to

on the second vehicle. Then,

connect a negative cable clamp to

on the second vehicle and connect the

clamp at the other end of the negative cable to

Positive (+) battery terminal (your vehicle)

Positive (+) battery terminal (second vehicle)

Negative (-) battery terminal (second vehicle)

Solid, stationary, unpainted metallic point away from the battery and any mov-
ing parts as shown in the illustration

Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery of your
vehicle.

Open and close any of the doors of
your vehicle with the power switch
OFF.

Maintain the engine speed of the
second vehicle and start the EV
system of your vehicle by turning
the power switch to ON.

Make sure the “READY” indicator
comes on. If the indicator light does
not come on, contact any autho-
rized Lexus retailer or Lexus autho-
rized repairer, or any reliable
repairer.

Once the EV system has started,
remove the jumper cables in the
exact reverse order from which
they were connected.

Once the EV system starts, have the
vehicle inspected at any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer as

A
B
C
D

463

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

soon as possible.

Starting the EV system when the 12-volt

battery is discharged

The EV system cannot be started by push-

starting.

To prevent 12-volt battery discharge

Turn off the headlights, the air condition-

ing system, the audio system, etc. while

the EV system is off.

Turn off any unnecessary electrical com-

ponents when the vehicle is running at a

low speed for an extended period, such

as in heavy traffic.

Charging the 12-volt battery

The electricity stored in the 12-volt battery

will discharge gradually even when the

vehicle is not in use, due to natural dis-

charge and the draining effects of certain

electrical appliances. If the vehicle is left for

a long time, the 12-volt battery may dis-

charge, and the EV system may be unable

to start. (The 12-volt battery recharges

automatically while the EV system is oper-

ating.)

When the 12-volt battery is removed or

discharged

Information stored in the ECU is cleared.

When the 12-volt battery is depleted,

have the vehicle inspected at any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

In some cases, it may not be possible to

unlock the doors using the smart entry &

start system when the 12-volt battery is

discharged. Use the wireless remote

control or the mechanical key to lock or

unlock the doors.

The EV system may not start on the first

attempt after the 12-volt battery has

recharged but will start normally after the

second attempt. This is not a malfunction.

The power switch mode is memorized by

the vehicle. When the 12-volt battery is

reconnected, the system will return to the

mode it was in before the 12-volt battery

was discharged. Before disconnecting

the 12-volt battery, turn the power switch

off.

If you are unsure what mode the power

switch was in before the 12-volt battery

discharged, be especially careful when

reconnecting the 12-volt battery.

If the 12-volt battery discharges, it may

not be possible to shift the shift position to

other positions. In this case, the vehicle

cannot be towed without lifting both front

wheels because the front wheels will be

locked. (



P.428)

The power back door (if equipped) must

be initialized. (



P.190)

When replacing the 12-volt battery

Use a 12-volt battery that conforms to

European regulations.

Use a 12-volt battery that the case size is

same as the previous one (LN0), 20

hour rate capacity (20HR) is equivalent

(35Ah) or greater, and performance rat-

ing (CCA) is equivalent (240A) or

greater.

• If the sizes differ, the 12-volt battery can-

not be properly secured.

• If an improper 12-volt battery is used, bat-

tery performance may decrease and the

EV system may not be able to restart.

• If the 20 hour rate capacity is low, even if

the time period where the vehicle is not

used is a short time, the 12-volt battery

may discharge and EV system may not

be able to start.

For details, consult with at any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer as soon as possible.

WARNING

When removing the 12-volt battery

terminals

Always remove the negative (-) terminal

first. If the positive (+) terminal contacts

any metal in the surrounding area when

the positive (+) terminal is removed, a

spark may occur, leading to a fire in addi-

tion to electrical shocks and death or

serious injury.

464

8-2. Steps to take in an emergency

WARNING

Avoiding 12-volt battery fires or

explosions

Observe the following precautions to

prevent accidentally igniting the flamma-

ble gas that may be emitted from the 12-

volt battery:

Make sure each jumper cable is con-

nected to the correct terminal and that

it is not unintentionally in contact with

any other than the intended terminal.

Do not allow the other end of the

jumper cable connected to the “+” ter-

minal to come into contact with any

other parts or metal surfaces in the

area, such as brackets or unpainted

metal.

Do not allow the + and - clamps of the

jumper cables to come into contact

with each other.

Do not smoke, use matches, cigarette

lighters or allow open flame near the

12-volt battery.

12-volt battery precautions

The 12-volt battery contains poisonous

and corrosive acidic electrolyte, while

related parts contain lead and lead com-

pounds. Observe the following precau-

tions when handling the 12-volt battery:

When working with the 12-volt battery,

always wear safety glasses and take

care not to allow any battery fluids

(acid) to come into contact with skin,

clothing or the vehicle body.

Do not lean over the 12-volt battery.

In the event that battery fluid (acid)

comes into contact with the skin or

eyes, immediately wash the affected

area with water and seek medical

attention.

Place a wet sponge or cloth over the

affected area until medical attention

can be received.

Always wash your hands after han-

dling the 12-volt battery and other bat-

tery-related parts.

Do not allow children near the 12-volt

battery.

When replacing the 12-volt battery

When the vent plug is close to the hold

down clamp, the battery fluid (acid)

may leak.

For information regarding battery

replacement, contact any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

NOTICE

When handling jumper cables

When connecting the jumper cables,

ensure that they do not become entan-

gled in the cooling fans.

465

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Stop the vehicle in a safe place and
turn off the air conditioning system.

Leave the EV system operating and
carefully lift the hood.

Check if the cooling fans are oper-
ating.
If the fans are operating:
Wait until the “EV System over-
heated Output power reduced”
message disappears and then stop
the EV system. If the message does
not disappear, call any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
If the fans are not operating:
Stop the EV system immediately
and call any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.

After the EV system has cooled
down, inspect the hoses and radia-
tor core (radiator) for any leaks.

Radiator

Cooling fans

If a large amount of coolant leaks, immedi-
ately contact any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.

The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.

Reservoir

“F” line

“L” line

If your vehicle overheats

When “EV System overheated
Output power reduced” is shown
on the multi-information display,
your vehicle may be overheating.

Correction procedures

A
B

A
B
C

466

8-2. Steps to take in an emergency

Add coolant if necessary.

Water can be used in an emergency if

coolant is unavailable.

Have the vehicle inspected at the near-
est authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer as soon as possible.

WARNING

To prevent an accident or injury when

inspecting under the hood of your

vehicle

Observe the following precautions.
Failure to do so may result in serious

injury such as burns.

If steam is seen coming from under the

hood, do not open the hood until the

steam has subsided. The motor com-

partment may be very hot.

Keep hands and clothing (especially a

tie, a scarf or a muffler) away from the

fans. Failure to do so may cause the

hands or clothing to be caught, result-

ing in serious injury.

Do not loosen the coolant reservoir

cap while the EV system and radiator

are hot. High temperature steam or

coolant could spray out.

NOTICE

When adding power control unit

coolant

Add coolant slowly after the EV system

has cooled down sufficiently. Adding

cool coolant to a hot EV system too

quickly can cause damage to the EV sys-

tem.

To prevent damage to the cooling

system

Observe the following precautions:

Avoid contaminating the coolant with

foreign matter (such as sand or dust,

etc.).

Do not use any coolant additive.

467

8-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Stop the EV system. Set the park-
ing brake and shift the shift position
to P.

Remove the mud, snow or sand
from around the front wheels.

Place wood, stones or some other
material under the front wheels to
help provide traction.

Restart the EV system.

Shift the shift position to D or R and
release the parking brake. Then,
while exercising caution, depress
the accelerator pedal.

When it is difficult to free the vehicle

Press the

switch to turn off TRC.

(



P.329)

If the vehicle becomes stuck

Carry out the following procedures
if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:

Recovering procedure

WARNING

When attempting to free a stuck vehi-

cle

If you choose to push the vehicle back

and forth to free it, make sure the sur-

rounding area is clear to avoid striking

other vehicles, objects or people. The

vehicle may also lunge forward or lunge

back suddenly as it becomes free. Use

extreme caution.

When shifting the shift position

Be careful not to shift the shift position

with the accelerator pedal depressed.

This may lead to unexpected rapid accel-

eration of the vehicle that may cause an

accident resulting in death or serious

injury.

NOTICE

To avoid damage to the transmission

and other components

Avoid spinning the tires and depress-

ing the accelerator pedal more than

necessary.

If the vehicle remains stuck even after

these procedures are performed, the

vehicle may require towing to be

freed.

470

9-1. Specifications

9-1.Specifications

: Overall width not including parts

Outside rear view mirrors

: Unladen vehicle

: Vehicles with 215/60R17 tires

: Vehicles with 225/50R18 tires

Vehicle identification number

The vehicle identification number
(VIN) is the legal identifier for your
vehicle.
This is the primary identification num-
ber for your Lexus. It is used in regis-
tering the ownership of your vehicle.
This number is on the top left of the
instrument panel.

This number is also on the manufac-
turer’s label.

Maintenance data

Dimensions and weights

Overall length

4495 mm (177.0 in.)

Overall width

1840 mm (72.4 in.)

Overall height

1545 mm (60.8 in.)

Wheelbase

2640 mm (103.9 in.)

Tread

Front

1558 mm (61.3 in.)

1548 mm (60.9 in.)

Rear

1560 mm (61.4 in.)

1550 mm (61.0 in.)

Gross vehicle mass

2245 kg (4949 lb.)

Maximum permissi-
ble axle capacity

Front

1270 kg (2800 lb.)

Rear

1270 kg (2800 lb.)

Vehicle identification

471

9-1. Specifications

Vehic

le spe

cif

ion
s

This number is also stamped under the
right-hand front seat.

Motor model type and motor num-
ber

The motor model type and the motor
number are stamped on the motor as
shown.

Electric motor (traction motor)

Model

4KM

Type

Permanent magnet synchronous motor

Maximum output

150 kW

Maximum torque

300 N•m (30.6 kgf•m, 221.3 ft•lbf)

Traction battery

Type

Lithium-ion battery

Voltage

3.7 V/cell

Capacity

153 Ah

Quantity

288 cells

Nominal voltage

355.2 V

472

9-1. Specifications

Power control unit

: The coolant capacity is the quantity of reference.

If replacement is necessary, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

12-volt battery

Cooling system

Capacity

2.5 L (2.6 qt., 2.3 Imp.qt.)

Coolant type

Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-

silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology

Do not use plain water alone.

Heater system

Capacity

1.4 L (1.5 qt., 1.2 Imp.qt.)

Coolant type

Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-

silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology

Do not use plain water alone.

Electrical system

Specific gravity reading at 20°C
(68°F):

1.250 or higher
If the specific gravity is lower than the standard value,
charge the 12-volt battery.

Charging rates:

Quick charge
Slow charge

15 A max.
5 A max.

473

9-1. Specifications

Vehic

le spe

cif

ion
s

: The fluid capacity is a reference quantity.

If replacement is necessary, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

: Minimum pedal clearance when depressed with a force of 300 N (31 kgf, 66 lbf) while

the EV system is operating.

: Make sure to confirm that the brake system warning light (yellow) does not illuminate. (If

the brake system warning light illuminates, refer to P.433)

Transmission

Fluid capacity

4.3 L (4.5 qt., 3.8 Imp.qt.)

Fluid type

Toyota Genuine ATF WS

NOTICE

Transmission fluid type

Using transmission fluid other than the above type may cause abnormal noise or vibra-

tion, or ultimately damage the transmission of your vehicle.

Brakes

Pedal clearance

109 mm (4.29 in.) Min.

Pedal free play

1.0 - 6.0 mm (0.04 - 0.24 in.)

Parking brake indicator

When pushing the parking brake switch for 1 to 4
seconds: comes on
When pulling the parking brake switch for 1 to 4
seconds: turns off

Fluid type

SAE J1703 or FMVSS No. 116 DOT 3,
SAE J1704 or FMVSS No. 116 DOT 4

Steering

Free play

Less than 30 mm (1.2 in.)

474

9-1. Specifications



17-inch tires



18-inch tires

A: Wedge base bulbs (amber)
B: Wedge base bulbs (clear)

Tires and wheels

Tire size

215/60R17 96H

Tire inflation pressure
(Recommended cold tire inflation
pressure)

Front: 250 kPa (2.5 kgf/cm

or bar, 36 psi)

Rear: 250 kPa (2.5 kgf/cm

or bar, 36 psi)

Wheel size



6 1/2 J

Wheel nut torque

103 N•m (10.5 kgf•m, 76 ft•lbf)

Tire size

225/50R18 95V

Tire inflation pressure
(Recommended cold tire inflation
pressure)

Front: 230 kPa (2.3 kgf/cm

or bar, 33 psi)

Rear: 230 kPa (2.3 kgf/cm

or bar, 33 psi)

Wheel size



7 J

Wheel nut torque

103 N•m (10.5 kgf•m, 76 ft•lbf)

Light bulbs

Type

Exterior

Front turn signal lights (vehicles with sin-
gle-beam headlights)

Interior

Vanity lights

475

9-2. Customization

Vehic

le spe

cif

ion
s

9-2.Customization

Changing using the meter control
switches

Press

of the meter con-

trol switches, select

Press

of the meter con-

trol switches, select the item, and
press “OK”.

Press

of the meter con-

trol switches, select the desired set-
ting, and press “OK”.

To go back to the previous screen or

exit the customize mode, press

Changing using the Remote Touch

Press the “MENU” button on the
Remote Touch.

Select “Setup” on the menu screen
and select “Vehicle”.

Select “Vehicle customisation”.

Various setting can be changed. Refer to

the list of settings that can be changed for

details.

For details on the Remote Touch, refer
to the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S MAN-
UAL”.

When customizing using the Remote

Touch

Stop the vehicle in a safe place, apply the

parking brake, and shift the shift position to

P. Also, to prevent 12-volt battery dis-

charge, leave the EV system operating

while customizing the features.

Some function settings are changed simultaneously with other functions being cus-
tomized. Contact any authorized Lexus retailer or Lexus authorized repairer, or
any reliable repairer for further details.

Settings that can be changed using the Remote Touch

Settings that can be changed using the meter control switches

Settings that can be changed by any authorized Lexus retailer or Lexus autho-

rized repairer, or any reliable repairer

Customizable features

Your vehicle includes a variety of
electronic features that can be per-
sonalized to your preferences. The
settings of these features can be
changed by using the meter control
switches, the Remote Touch or at
any authorized Lexus retailer or
Lexus authorized repairer, or any
reliable repairer.

Customizing vehicle features

NOTICE

During customization

To prevent 12-volt battery discharge,

ensure that the EV system is operating

while customizing features.

Customizable features

476

9-2. Customization

Definition of symbols: O = Available,



= Not available

EV system (



P.111, 120)

Gauges, meters and multi-information display (



P.161, 164)

Function

Default setting Customized setting

Charging current

MAX

16A



Charging limit

Full

90%



Battery cooler

Off



Function

Default setting

Customized set-

ting

Language

English

French



German

Italian

Dutch

Spanish

Russian

Turkish

Arabic

Units

(kWh/100km)

km (km/kWh)



miles

(miles/kWh)

Speedometer display

Digital

Analog



Drive information 1

Current electric-

ity consumption



Average electric-

ity consumption

(after reset)

Lexus UX 300e (2023 year). Manual in english - page 14