2015 Lexus GS350 tires

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4-5. Using the driving support systems
CAUTION
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect the
driving assist systems, and may cause a system to malfunction.

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4-6. Driving tips
Winter driving tips
●Use fluids that are appropriate to the prevailing outside temperatures. • Engine oil
• Engine coolant
• Washer fluid
●Have a service technician inspec t the condition of the battery.
●Have the vehicle fitted with four sno w tires or purchase a set of tire
chains for the rear tires.
*
Ensure that all tires are the specified size and brand, and that chains match the
size of the tires.
*: Tire chains cannot be mounted on vehicles with front and rear tires of differing
sizes and vehicles with LDH and 19-inch tires.
Carry out the necessary preparati ons and inspections before driving
the vehicle in winter. Always drive the vehicle in a manner appropriate
to the prevailing weather conditions.
Preparation for winter

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2854-6. Driving tips
4
Driving
Perform the following according to the driving conditions:
●Do not try to forcibly open a window or move a wiper that is frozen.
Pour warm water over the frozen area to melt the ice. Wipe away the
water immediately to prevent it from freezing.
●To ensure proper operation of the climate control system fan, remove
any snow that has accumulated on the air inlet vents in front of the wind-
shield.
●Check for and remove any excess ice or snow that may have accumu-
lated on the exterior lights, vehicle’s roof, chassis, around the tires or on
the brakes.
●Remove any snow or mud from the bo ttom of your shoes before getting
in the vehicle.
Accelerate the vehicle slowly, keep a safe distance between you and the
vehicle ahead, and drive at a reduced speed suitable to road conditions.
Park the vehicle and move the shift lever to P without setting the parking
brake. The parking brake may freeze up, preventing it from being
released. If necessary, block the wheels to prevent inadvertent sliding or
creeping.
Before driving the vehicle
When driving the vehicle
When parking the vehicle

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4-6. Driving tips
Vehicles with front and rear tires of the same size except for the vehi-
cles 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 differing 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 loca l regulations before installing chains.
Selecting tire chains
1
2
Regulations on the use of tire chains

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2874-6. Driving tips
4
Driving
If heavy snow or icy condition is expected, shift the rest position manually.
Grip the hook section of the wiper arm firmly when shifting the wiper
position.
■To rest position
Raise the wiper in line with the
windshield.
You can stand the wipers up for the
rest position.
★ : More than 3.9 in. (10 cm)
■To retract position
Lower the wipers by pressing on
the upper part of the hook sec-
tion.
■Tire chain installation
Observe the following precautions when installing and removing chains:
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires. Do not install tire chains on the front tires.
●Install tire chains on rear tires as tightly as possible. Retighten chains after driving
1/4  1 /2 mile (0.5  1.0 km).
●Install tire chains following the instructions provided with the tire chains.
Shifting the windsh ield wiper position

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4-6. Driving tips
CAUTION
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle 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.
●Do not use LKA (Lane-Keeping Assist) system.
■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 tire 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 opera-
tions that cause sudden engine braking.
●Slow down sufficiently before entering a curve to ensure that vehicle control is
maintained.
●Do not use LKA (Lane-Keeping Assist) system.

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2894-6. Driving tips
4
Driving
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow tires from Lexus dealers or legitimate tire
retailers.
This is because the removal and attachment of snow tires affects the operation of
the tire pressure warning valves and transmitters.
■Fitting tire chains (vehicles with front an d rear tires of the same size except for
the vehicles with LDH and 19 inch tires)
The tire pressure warning valves 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. 2 8 7 )
Failure to do so may result in dama ge to the wipers and/or the hood.

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Maintenance and care6
6-1. Maintenance and care Cleaning and protecting the vehicle exterior.................. 376
Cleaning and protecting the vehicle interior ................. 380
6-2. Maintenance Maintenance requ irements ...383
General maintena nce ..............386
Emission inspection and maintenance (I/M)
programs ....................................390
6-3. Do-it-yourself maintenance Do-it-yourself service precautions ................................. 391
Hood ............................................... 394
Positioning a floor jack ............. 395
Engine compartment ............... 397
Tires ................................................... 410
Tire inflation pressure ............... 420
Wheels ........................................... 423
Air conditioning filter ............... 425
Electronic key battery ...............427
Checking and replacing fuses .............................................. 429
Headlight aim .............................. 442
Light bulbs..................................... 444