Lexus UX250h (2023 year). Manual in english

412

8-1. Specifications

■

Spark plug

■

12-volt battery

: The fluid capacity is a reference quantity.

If replacement is necessary, contact your Lexus dealer.

Ignition system

Make

DENSO FC16HR-Q8

Gap

0.031 in. (0.8 mm)

NOTICE

■

Iridium-tipped spark plugs

Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

Electrical system

Open voltage at 68°F (20°C):

12.0 V or higher
If the voltage is lower than the standard value,
charge the battery.
(After charging the battery, turn on the high beam
headlights for 30 seconds with the power switch
OFF, and turn the headlights off.)

Charging rates:
Quick charge
Slow charge

15 A max.
5 A max.

Hybrid transmission

Fluid capacity

4.0 qt. (3.8 L, 3.3 Imp.qt.)

Fluid type

Toyota Genuine ATF WS

NOTICE

■

Hybrid 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.

413

8-1. Specifications

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: The fluid capacity is a reference quantity.

If replacement is necessary, contact your Lexus dealer.

: Minimum pedal clearance when depressed with a force of 67.4 lbf (300N, 30.6 kgf)

while the hybrid 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.379.)

Rear differential (rear electric motor) (AWD models)

Fluid capacity

1.3 qt. (1.2 L, 1.1 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

4.29 in. (109 mm) Min.

Brake pad wear limit

0.04 in. (1.0 mm)

Pedal free play

0.04



0.24 in. (1.0



6.0 mm)

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 1.2 in. (30 mm)

414

8-1. Specifications

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

Tires and wheels

Tire size

225/50RF18 95V

Tire inflation pressure
(Recommended cold tire inflation
pressure)

Front: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Rear: 33 psi (230 kPa, 2.3 kgf/cm

or bar)

Wheel size



7 J

Wheel nut torque

76 ft•lbf (103 N•m, 10.5 kgf•m)

Light bulbs

Bulb No.

Type

Exterior

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

WY21W

Interior

Vanity lights



415

8-1. Specifications

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Gasoline quality

In very few cases, driveability problems may

be caused by the brand of gasoline you are

using. If driveability problems persist, try

changing the brand of gasoline. If this does

not correct the problem, consult your Lexus

dealer.

■

Recommendation of the use of gasoline

containing detergent additives

●

Lexus recommends the use of gasoline

that contains detergent additives to avoid

the build-up of engine deposits.

●

All gasoline sold in the U.S.A. contains

minimum detergent additives to clean

and/or keep clean intake systems, per

EPA’s lowest additives concentration

program.

●

Lexus strongly recommends the use of

Top Tier Detergent Gasoline. For more

information on Top Tier Detergent Gas-

oline and a list of marketers, please go to

the official website www.toptiergas.com.

■

Recommendation of the use of low

emissions gasoline

Gasolines containing oxygenates such as

ethers and ethanol, as well as reformulated

gasolines, are available in some cities.

These fuels are typically acceptable for use,

providing they meet other fuel require-

ments.

Lexus recommends these fuels, since the

formulations allow for reduced vehicle

emissions.

■

Non-recommendation of the use of

blended gasoline

●

Use only gasoline containing up to 15%
ethanol.
DO NOT use any flex-fuel or gasoline
that could contain more than 15% etha-
nol, including from any pump labeled
E30 (30% ethanol

), E50 (50% eth-

anol

), E85 (85% ethanol

)

(which are only some examples of fuel
containing more than 15% ethanol).

●

If you use gasohol in your vehicle, be sure

that it has an octane rating no lower than

87.

●

Lexus does not recommend the use of

gasoline containing methanol.

■

Non-recommendation of the use of gas-

oline containing MMT

Some gasoline contains an octane enhanc-

ing additive called MMT (Methylcyclo-

pentadienyl Manganese Tricarbonyl).
Lexus does not recommend the use of gas-

oline that contains MMT. If fuel containing

MMT is used, your emission control system

may be adversely affected.
The malfunction indicator lamp on the

instrument cluster may come on. If this hap-

pens, contact your Lexus dealer for service.

■

If your engine knocks

●

Consult your Lexus dealer.

●

You may occasionally notice light knock-

ing for a short time while accelerating or

driving uphill. This is normal and there is

no need for concern.

Fuel information

You must only use unleaded gaso-
line.
Select octane rating 87 (Research
Octane Number 91) or higher. Use
of unleaded gasoline with an octane
rating lower than 87 may result in
engine knocking. Persistent knock-
ing can lead to engine damage.

At minimum, the gasoline you use
should meet the specifications of
ASTM D4814 in the U.S.A.

416

8-1. Specifications

NOTICE

■

Notice on fuel quality

●

Do not use improper fuels. If improper

fuels are used, the engine will be dam-

aged.

●

Do not use leaded gasoline.

Leaded gasoline can cause damage to

your vehicle’s three-way catalytic con-

verters causing the emission control sys-

tem to malfunction.

●

Do not use gasohol other than the type

previously stated.

Other gasohol may cause fuel system

damage or vehicle performance prob-

lems.

●

Using unleaded gasoline with an

octane number or rating lower than

the level previously stated will cause

persistent heavy knocking.

At worst, this will lead to engine damage

and will void the vehicle warranty.

■

Fuel-related poor driveability

If poor driveability (poor hot starting,

vaporization, engine knocking, etc.) is

encountered after using a different type

of fuel, discontinue the use of that type of

fuel.

■

When refueling with gasohol

Take care not to spill gasohol. It can

damage your vehicle’s paint.

417

8-1. Specifications

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Tire size (



P.418)

Run-flat tire (RFT) or standard tire (



P.392)

This vehicle can be equipped with either run-flat tires (RFT) or standard tires. A

mark is molded on the sidewall of the run-flat tire.

DOT and Tire Identification Number (TIN) (



P.418)

Location of treadwear indicators (



P.339)

Tire ply composition and materials

Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.

Radial tires or bias-ply tires

A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply tire.

TUBELESS or TUBE TYPE

A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a
tube inside the tire and the tube maintains the air pressure.

Load limit at maximum cold tire inflation pressure (



P.421)

Maximum cold tire inflation pressure (



P.421)

This means the pressure to which a tire may be inflated.

Uniform tire quality grading

For details, see “Uniform Tire Quality Grading” that follows.

Tire information

Typical tire symbols

A
B

C
D

418

8-1. Specifications

Summer tires or all season tires (



P.339)

An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a summer tire.



Type A

DOT symbol

Tire Identification Number (TIN)

Tire manufacturer’s identification
mark

Tire size code

Manufacturer’s optional tire type
code (3 or 4 letters)

Manufacturing week

Manufacturing year

: The DOT symbol certifies that the tire

conforms to applicable Federal Motor
Vehicle Safety Standards.



Type B

DOT symbol

Tire Identification Number (TIN)

Tire manufacturer’s identification
mark

Manufacturer’s code

Manufacturing week

Manufacturing year

: The DOT symbol certifies that the tire

conforms to applicable Federal Motor
Vehicle Safety Standards.

■

Typical tire size information

The illustration indicates typical tire
size.

Typical DOT and Tire Identifica-
tion Number (TIN)

A
B
C

Tire size

A
B
C

E
F

419

8-1. Specifications

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Tire use
(P = Passenger car,
T = Temporary use)

Section width (millimeters)

Aspect ratio
(tire height to section width)

Tire construction code
(R = Radial, D = Diagonal)

Run-flat tire code

Wheel diameter (inches)

Load index (2 digits or 3 digits)

Speed symbol (alphabet with one
letter)

■

Tire dimensions

Section width

Tire height

Wheel diameter

Bead

Sidewall

Shoulder

Tread

Belt

Inner liner

Reinforcing rubber

Carcass

Rim lines

Bead wires

Chafer

This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.

Your Lexus dealer will help answer any
questions you may have as you read this

B
C

E
F

A
B
C

Tire section names

Uniform Tire Quality Grading

A
B
C
D

E
F

420

8-1. Specifications

information.

■

DOT quality grades

All passenger vehicle tires must con-
form to Federal Safety Requirements
in addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.

For example: Treadwear 200 Traction AA
Temperature A

■

Treadwear

The treadwear grade is a comparative
rating based on the wear rate of the
tire when tested under controlled con-
ditions on a specified government test
course.

For example, a tire graded 150 would
wear one and a half (1 - 1/2) times as well
on the government course as a tire graded
100.
The relative performance of tires depends
upon the actual conditions of their use.
Performance may differ significantly from
the norm due to variations in driving habits,
service practices and differences in road
characteristics and climate.

■

Traction AA, A, B, C

The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.

A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include

cornering (turning) traction.

■

Temperature A, B, C

The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.

Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure.
Grade C corresponds to a level of perfor-
mance which all passenger car tires must
meet under the Federal Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, underinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.

421

8-1. Specifications

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Glossary of tire terminology

Tire related term

Meaning

Cold tire inflation pressure

Tire pressure when the vehicle has been parked for three
hours or more, or has not been driven more than 1 mile or
1.5 km under that condition

Maximum inflation pressure

The maximum cold inflated pressure to which a tire may be
inflated, shown on the sidewall of the tire

Recommended inflation
pressure

Cold tire inflation pressure recommended by a manufac-
turer

Accessory weight

The combined weight (in excess of those standard items
which may be replaced) of hybrid transmission, power
steering, power brakes, power windows, power seats, radio
and heater, to the extent that these items are available as
factory-installed equipment (whether installed or not)

Curb weight

The weight of a motor vehicle with standard equipment,
including the maximum capacity of fuel, oil and coolant, and
if so equipped, air conditioning and additional weight
optional engine

Maximum loaded vehicle
weight

The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight

Normal occupant weight

150 lb. (68 kg) times the number of occupants specified in
the second column of Table 1

that follows

Occupant distribution

Distribution of occupants in a vehicle as specified in the third
column of Table 1

below

Production options weight

The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the stan-
dard items which they replace, not previously considered in
curb weight or accessory weight, including heavy duty
brakes, ride levelers, roof rack, heavy duty 12-volt battery,
and special trim

Rim

A metal support for a tire or a tire and tube assembly upon
which the tire beads are seated

Rim diameter
(Wheel diameter)

Nominal diameter of the bead seat

422

8-1. Specifications

Rim size designation

Rim diameter and width

Rim type designation

The industry manufacturer’s designation for a rim by style or
code

Rim width

Nominal distance between rim flanges

Vehicle capacity weight
(Total load capacity)

The rated cargo and luggage load plus 150 lb. (68 kg) times
the vehicle’s designated seating capacity

Vehicle maximum load on
the tire

The load on an individual tire that is determined by distribut-
ing to each axle its share of the maximum loaded vehicle
weight, and dividing by two

Vehicle normal load on the
tire

The load on an individual tire that is determined by distribut-
ing to each axle its share of curb weight, accessory weight,
and normal occupant weight (distributed in accordance
with Table 1

below), and dividing by two

Weather side

The surface area of the rim not covered by the inflated tire

Bead

The part of the tire that is made of steel wires, wrapped or
reinforced by ply cords and that is shaped to fit the rim

Bead separation

A breakdown of the bond between components in the bead

Bias ply tire

A pneumatic tire in which the ply cords that extend to the
beads are laid at alternate angles substantially less than 90
degrees to the centerline of the tread

Carcass

The tire structure, except tread and sidewall rubber which,
when inflated, bears the load

Chunking

The breaking away of pieces of the tread or sidewall

Cord

The strands forming the plies in the tire

Cord separation

The parting of cords from adjacent rubber compounds

Cracking

Any parting within the tread, sidewall, or innerliner of the tire
extending to cord material

A pneumatic tire with an inverted flange tire and rim system
in which the rim is designed with rim flanges pointed radially
inward and the tire is designed to fit on the underside of the
rim in a manner that encloses the rim flanges inside the air
cavity of the tire

Extra load tire

A tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire

Tire related term

Meaning

423

8-1. Specifications

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Groove

The space between two adjacent tread ribs

Innerliner

The layer(s) forming the inside surface of a tubeless tire that
contains the inflating medium within the tire

Innerliner separation

The parting of the innerliner from cord material in the car-
cass

Intended outboard sidewall

(a) The sidewall that contains a whitewall, bears white letter-
ing, or bears manufacturer, brand, and/or model name
molding that is higher or deeper than the same molding on
the other sidewall of the tire, or
(b) The outward facing sidewall of an asymmetrical tire that
has a particular side that must always face outward when
mounted on a vehicle

Light truck (LT) tire

A tire designated by its manufacturer as primarily intended
for use on lightweight trucks or multipurpose passenger
vehicles

Load rating

The maximum load that a tire is rated to carry for a given
inflation pressure

Maximum load rating

The load rating for a tire at the maximum permissible infla-
tion pressure for that tire

Maximum permissible infla-
tion pressure

The maximum cold inflation pressure to which a tire may be
inflated

Measuring rim

The rim on which a tire is fitted for physical dimension
requirements

Open splice

Any parting at any junction of tread, sidewall, or innerliner
that extends to cord material

Outer diameter

The overall diameter of an inflated new tire

Overall width

The linear distance between the exteriors of the sidewalls of
an inflated tire, including elevations due to labeling, decora-
tions, or protective bands or ribs

Passenger car tire

A tire intended for use on passenger cars, multipurpose
passenger vehicles, and trucks, that have a gross vehicle
weight rating (GVWR) of 10,000 lb. or less.

Ply

A layer of rubber-coated parallel cords

Ply separation

A parting of rubber compound between adjacent plies

Tire related term

Meaning

424

8-1. Specifications

: Table 1



Occupant loading and distribution for vehicle normal load for various desig-

nated seating capacities

Pneumatic tire

A mechanical device made of rubber, chemicals, fabric and
steel or other materials, that, when mounted on an automo-
tive wheel, provides the traction and contains the gas or fluid
that sustains the load

Radial ply tire

A pneumatic tire in which the ply cords that extend to the
beads are laid at substantially 90 degrees to the centerline
of the tread

Reinforced tire

A tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire

Section width

The linear distance between the exteriors of the sidewalls of
an inflated tire, excluding elevations due to labeling, decora-
tion, or protective bands

Sidewall

That portion of a tire between the tread and bead

Sidewall separation

The parting of the rubber compound from the cord material
in the sidewall

Snow tire

A tire that attains a traction index equal to or greater than
110, compared to the ASTM E-1136 Standard Reference
Test Tire, when using the snow traction test as described in
ASTM F-1805-00, Standard Test Method for Single Wheel
Driving Traction in a Straight Line on Snow-and Ice-Cove-
red Surfaces, and which is marked with an Alpine Symbol
(

) on at least one sidewall

Test rim

The rim on which a tire is fitted for testing, and may be any
rim listed as appropriate for use with that tire

Tread

That portion of a tire that comes into contact with the road

Tread rib

A tread section running circumferentially around a tire

Tread separation

Pulling away of the tread from the tire carcass

Treadwear indicators (TWI)

The projections within the principal grooves designed to
give a visual indication of the degrees of wear of the tread

Wheel-holding fixture

The fixture used to hold the wheel and tire assembly
securely during testing

Tire related term

Meaning

425

8-1. Specifications

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Designated seating capac-

ity, Number of occupants

Vehicle normal load, Num-

ber of occupants

Occupant distribution in a

normally loaded vehicle

2 through 4

2 in front

5 through 10

2 in front, 1 in second seat

11 through 15

2 in front, 1 in second seat, 1 in

third seat, 1 in fourth seat

16 through 20

2 in front, 2 in second seat, 2

in third seat, 1 in fourth seat

426

8-2. Customization

8-2.Customization

■

Changing using the meter control
switches

Press

of the meter con-

trol switches, and 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 Center Dis-
play

Select

on the main menu.

Select “Vehicle customize” on the
sub menu.

Various setting can be changed. Refer to

the list of settings that can be changed for

details.

■

When customizing using the Center

Display

Stop the vehicle in a safe place, apply the

parking brake, and shift the shift lever to P.

Also, to prevent 12-volt battery discharge,

leave the hybrid system operating while

customizing the features.

Some function settings are changed simultaneously with other functions being cus-
tomized. Contact your Lexus dealer for further details.

Settings that can be changed using the Center Display
Settings that can be changed using the meter control switches
Settings that can be changed by your Lexus dealer

Definition of symbols: O = Available,



= Not available

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 Center Display or at
your Lexus dealer.

Customizing vehicle features

WARNING

■

Cautions during customization

As the hybrid system needs to be operat-

ing during customization, ensure that the

vehicle is parked in a place with ade-

quate ventilation. In a closed area such as

a garage, exhaust gases including harm-

ful carbon monoxide (CO) may collect

and enter the vehicle. This may lead to

death or a serious health hazard.

NOTICE

■

During customization

To prevent 12-volt battery discharge,

ensure that the hybrid system is operat-

ing while customizing features.

Customizable features

A
B
C

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8-2. Customization

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■

Gauges, meters and multi-information display (



P.79, 83, 89)

Function

Default setting

Customized set-

ting

Language

English

French



Spanish

Units

miles (MPG)

km (km/L)



km (L/100 km)

miles (MPG Impe-

rial)

Speedometer display

Digital

Analog



Drive information 1

Current fuel con-

sumption



Average fuel econ-

omy (after reset)

Drive information 2

Distance (driving

range)



Average vehicle

speed (after reset)

Pop-up display

Off



Accent color

Color 1

Color 2



Tachometer setting

Change according

to driving mode

Always tachome-

ter



Always Hybrid

System Indicator

Rev indicator

Off



Rev indicator red zone set-
ting

4000 rpm

2000 - 6200 rpm



Rev peak

Off



EV indicator

Off



Suggestion function

On (when the vehi-

cle is stopped)



Off

Rear seat reminder function

Off



Lexus UX250h (2023 year). Manual in english - page 25