tire size Lexus GS250 2012 User Guide

693
6 6-3. Do-it-yourself maintenance
Maintenance and care
GS350/250_EE (OM30C36E)
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 any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
*: Conventionally referred to as “off-
set”.
Lexus does not recommend using the following:
Wheels of different sizes or types
Used wheels
Bent wheels that have been straightened
Use only Lexus wheel nuts and wrenches designed for use with
your aluminum wheels.
When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1600 km (1000 miles).
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.
If a wheel is bent, cracked or heavily corroded, it should be
replaced. Otherwise, the tire may separate from the wheel or cause
a loss of handling control.
Wheel selection
Aluminum wheel precautions

6946-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
When replacing wheels (vehicles with the tire pressure warning system)
The wheels of your vehicle are equipped with tire pressure warning valves
and transmitters 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. 674)
CAUTION
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 tube-
less tire. Doing so may result in an accident, causing death or serious
injury.
NOTICE
Replacing tire pressure warning valves and transmitters (vehicles with the
tire pressure warning system)
Because tire repair or replacement may affect the tire pressure warning
valves and transmitters, make sure to have tires serviced by any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional or other qualified service shop. In addition, make sure to
purchase your tire pressure warning valves and transmitters at any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional.
Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with
non-genuine wheels.

7537-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
*1: Open door warning buzzer:
P. 7 6 3
*2: Driver’s and front passenger’s seat belt buzzer:
The driver’s and front passenger’s seat belt buzzer sounds to alert the
driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 30 seconds after the vehicle reaches a
speed of 20 km/h (12 mph). Then, if the seat belt is still unfastened, the
buzzer will sound in a different tone for 90 more seconds.
Tire pressure warning light
When the light comes on:
Low tire inflation pressure
such as
• Natural causes (P.
754)
• Flat tire (P. 783, 798)
Adjust the tire inflation pres-
sure (including the full-size
spare tire) to the specified
level.
The light will turn off after
a few minutes. In case the
light does not turn off even
if the tire inflation pressure
is adjusted, have the sys-
tem checked by any autho-
rized Lexus dealer or
repairer, or another duly
qualified and equipped
professional.
When the light comes on
after blinking for 1 minute:
Malfunction in the tire pres-
sure warning systemHave the system checked by
any authorized Lexus dealer
or repairer, or another duly
qualified and equipped pro-
fessional.
Wa r n i n g
lightWarning light/DetailsCorrection procedure

7557-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
When a tire is replaced with a spare tire
Vehicles with a compact spare tire: The compact spare tire is not equipped
with a tire pressure warning valve and transmitter. If a tire goes flat, the tire
pressure warning light will not turn off even though the flat tire has been
replaced with the spare tire.
Vehicles with a full-size spare tire: The spare tire is also equipped with a tire
pressure warning valve and transmitter. The tire pressure warning light will
turn on if the tire inflation pressure of the spare tire is low. If a tire goes flat,
the tire pressure warning light will not turn off even though the flat tire has
been replaced with the spare tire.
Conditions that the tire pressure warning system may not function properly
P. 6 7 8
If the tire pressure warning light frequently comes on after blinking for 1 min-
ute
If the tire pressure warning light frequently comes on after blinking for 1
minute when the engine switch is turned to IGNITION ON mode, have it
checked by any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an
audio sound.

7857-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
Vehicles with a full-size spare tire
Jack handle
Parking brake release tool
Screwdriver
Towing eyeletWheel nut wrench
Jack
Spare tire1
2
3
4
5
6
7

7877-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)Remove the center luggage mat. (P. 622)
Remove the spacer and take out the jack handle from the reverse
side of the center luggage mat.
Take out the jack.
Taking out the jack and jack handle
1
2
Vehicles with a compact
spare tireVehicles with a full-size
spare tire
3
For tightening
For loosening
Vehicles with a compact
spare tireVehicles with a full-size
spare tire
1
2

7887-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Vehicles with a compact spare tire
Remove the center luggage mat. (P. 622)
Loosen the center fastener that
secures the spare tire.
Vehicles with a full-size spare tire
Remove the center luggage mat. (P. 622)
Remove the spacers.
Loosen the center fastener that
secures the spare tire.
Taking out the spare tire
1
2
1
2
3

7907-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)Turn the tire jack portion “A”
by hand until the notch of the
jack is in contact with the jack
point.
The jack point guides are located
under the rocker panel. They indi-
cate the jack point positions.
Raise the vehicle until the tire
is slightly raised off the
ground.
Remove all the wheel nuts 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.
Vehicles with a full-size spare
tire: Remove the wheel orna-
ment by pushing from the
reverse side.
3
4
5
6

7937-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)Firmly tighten each wheel nut
two or three times in the order
shown in the illustration.
Tightening torque:
103 N•m (10.5 kgf•m, 76 ft•lbf)
Vehicles with a full-size spare
tire: Reinstall the wheel orna-
ment.
Stow the flat tire, tire jack and all tools.
4
5
6

7947-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
The compact spare tire
The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
Make sure to check the tire inflation pressure of the compact spare tire.
(P. 850)
When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning valve
and transmitter, low inflation pressure of the spare tire will not be indicated
by the tire pressure warning system. Also, if you replace the compact spare
tire after the tire pressure warning light comes on, the light remains on.
When the compact spare tire is equipped
The vehicle becomes lower when driving with the compact spare tire com-
pared to when driving with standard tires.
If you have a flat rear tire on a road covered with snow or ice (vehicles with
front and rear tires of the same size and compact spare tire only)
Install the compact spare tire on one of the front wheels of the vehicle. Per-
form the following steps and fit tire chains to the rear tires:
Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehicle.
Fit tire chains to the rear tires.
1
2
3