tire type Lexus GS450h 2018 Owner's Manual / LEXUS 2018 GS450H OWNER'S MANUAL (OM30G62U)

15Pictorial index
GS450h_OM_OM30G62U_(U)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 207
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 276
To prevent freezing (windshield wiper de-icer)
*. . . . . . . . . . . . . . . . . . . . . . . P. 293
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 472
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 365
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 477
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 27 6
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . P. 365
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P . 441
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 351
Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 351
Engine compartment cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 354
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 473
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 46 1
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 4 12
Headlights/front side marker lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Front turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Side turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Tail lights/rear side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Rear turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 195
Stop lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 168
Back-up light
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
4
5
6
7
Light bulbs of the exte rior lights for driving
(Replacing method: P. 391, Watts: P. 480)
*: If equipped
8
9
10
11
12

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GS450h_OM_OM30G62U_(U)
4-5. Using the driving support systems
●The headlight lenses are dirty and emit a faint amount of light at night, or the beam axis
has deviated.
●The vehicle is struck by a crosswind.
●The vehicle has just changed lanes or crossed an intersection.
●Snow tires, etc. are equipped.
■Warning message
Warning messages are used to indicate a syst em malfunction or to inform the driver of
the need for caution while driving. ( →P. 410)
■Customization
The following settings can be changed.
For how to change settings, refer to P. 494
FunctionSetting details
Lane departure alert functionAdjust alert sensitivity
Adjust alert type
Steering assist functionTurn steering wheel assistance on and off
Vehicle sway warning functionTurn function on and off
Adjust alert sensitivity
Lane centering functionTurn function on and off

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GS450h_OM_OM30G62U_(U)
4-6. Driving tips
Vehicles with front and rear tires of the same size except for the vehicles with
LDH and 19 inch tires
Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.
Side chain
(0.12 in. [3 mm] in diameter)
Cross chain
(0.16 in. [4 mm] in diameter)
Vehicles with front and rear tires of di ffering sizes and vehicles with LDH and
19 inch tires
Tire chains cannot be mounted.
Snow tires should be used instead.
Regulations regarding the use of tire chains vary depending on location and type
of road. Always check local regu lations before installing chains.
Selecting tire chains
1
2
Regulations on the use of tire chains

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GS450h_OM_OM30G62U_(U)
4-6. Driving tips
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehi cle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive in excess of 75 mph (120 km/h ), regardless of the type of snow tires
being used.
●Use snow tires on all, not just some wheels.
■Driving with tire chains (vehicles with front and rear tires of the same size except for
the vehicles with LDH and 19 inch tires)
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the ti re chains being used, or 30
mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
●Slow down sufficiently before entering a cu rve to ensure that vehicle control is main-
tained.
●Do not use LKA (Lane-Keeping Assist) system. (if equipped)
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow ti res from Lexus dealers or legitimate tire
retailers.
This is because the removal an d attachment of snow tires affects the operation of the
tire pressure warning va lves and transmitters.
■Fitting tire chains (vehicles with front and rear tires of the same size except for the
vehicles with LDH and 19 inch tires)
The tire pressure warning valv es and transmitters may not function correctly when tire
chains are fitted.
■When standing the windshield wipers up
Raise the wipers in line with the windshield. ( →P. 279)
Failure to do so may result in dama ge to the wipers and/or the hood.

GS450h_OM_OM30G62U_(U)
3696-3. Do-it-yourself maintenance
6
Maintenance and care
■Maximum load of tire
Check that the maximum load of the replacement 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.
■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 road s, the use of snow tires is recommended.
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, how-
ever, do not have adequate traction perfor mance compared with snow tires in heavy
or loose snow. Also, all season tires fall short in acceleration and handling perfor-
mance compared with summer tires in highway driving.
●Snow tires
For driving on snow-covered roads or icy roads, we recommend using snow tires. If
you need snow tires, select ti res of the same size, construction and load capacity as the
originally installed tires. Since your vehicle has radial tires as original equipment, make
sure your snow tires also have radial cons truction. Do not install studded tires without
first checking local regulations for possible restrictions. Snow tires should be installed
on all wheels. ( →P. 276)
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tire s as snow tires is lost.
For the GAWR, see the Ce
rtification Label. For
the maximum load of the tire, see the load limit
at maximum cold tire inflation pressure men-
tioned on the sidewall of the tire. ( →P. 484)

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GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
Wheels
When replacing wheels, care should be taken to ensure that they are equivalent
to those removed in load capacity, diameter, rim width and inset
*.
Replacement wheels are available at your Lexus dealer.
*: 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 straightened
●Steel wheels (F SPORT models only)
●Use only Lexus wheel nuts and wrenches designed for use with your alumi-
num wheels.
●When rotating, repairing or changing your tires, check that the wheel nuts are
still tight after driving 1000 miles (1600 km).
●Be careful not to damage the aluminum wheels when using tire chains.
●Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels.
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and transmit-
ters that allow the tire pressure warning system to provide advance warning in the event
of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning
valves and transmitters must be installed. (→P. 366)
If a wheel is bent, cracked or heavily corroded, it should be replaced. Other-
wise, the tire may separate from the wheel or cause a loss of handling control.
Wheel selection
Aluminum wheel precautions

GS450h_OM_OM30G62U_(U)
4778-1. Specifications
8
Vehicle specifications
*: Minimum pedal clearance when depressed with a force of 112.4 lbf (500 N, 51.0 kgf)
while the hybrid system is operating.
When performing the brake pedal inspection , also be sure to check that the brake
system warning light is not illuminated when the hybrid system is operating (If the
brake system warning light is illuminated, refer to P. 404).
Type A
Brakes
Pedal clearance*4.5 in. (115 mm) Min.
Pedal free play0.04 — 0.24 in. (1.0 — 6.0 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size225/50R17 94W
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 118 mph
(190 km/h)45 (310, 3.1)45 (310, 3.1)
118 mph (190 km/h)
or less35 (240, 2.4)35 (240, 2.4)
Wheel size17 × 7 1/2J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

478
GS450h_OM_OM30G62U_(U)
8-1. Specifications
Type B
Type C
Type D
Tire size235/45R18 94Y
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)45 (310, 3.1)45 (310, 3.1)
137 mph (220 km/h)
or less35 (240, 2.4)35 (240, 2.4)
Wheel size18 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire sizeP235/45R18 94V
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speedFront tire
psi (kPa, kgf/cm2
or bar)Rear tire
psi (kPa, kgf/cm2
or bar)
More than 99 mph
(160 km/h)45 (310, 3.1)45 (310, 3.1)
99 mph (160 km/h)
or less35 (240, 2.4)35 (240, 2.4)
Wheel size18 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size235/40R19 96Y XL (front), 265/35R19 94Y (rear)
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)45 (310, 3.1)45 (310, 3.1)
137 mph (220 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J (235/40R19), 19 × 9J (265/35R19)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

GS450h_OM_OM30G62U_(U)
4798-1. Specifications
8
Vehicle specifications
Type E
Type F
Compact spare tire
Tire size235/40R19 96Y XL
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)45 (310, 3.1)45 (310, 3.1)
137 mph (220 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size235/40R19 96V XL
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speedFront tire
psi (kPa, kgf/cm2
or bar)Rear tire
psi (kPa, kgf/cm2
or bar)
More than 99 mph
(160 km/h)45 (310, 3.1)45 (310, 3.1)
99 mph (160 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire sizeT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold tire
inflation pressure)
60 psi (420kPa, 4.2kgf/cm2 or bar)
Wheel size17 × 4T (T155/70D17), 18 × 4T (T145/70D18)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

GS450h_OM_OM30G62U_(U)
4858-1. Specifications
8
Vehicle specifications
Tire size (→ P. 486)
DOT and Tire Identification Number (TIN) (→ P. 486)
Location of trea dwear indicators (→ P. 365)
Tire ply composition and materials
Plies are layers of rubber-c oated 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. 489)
Maximum cold tire inflation pressure (→ P. 489)
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires (→ P. 369)
An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE ONLY” molded
on its sidewall. This tire is designed for temporary emergency use only.
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