2008 Lexus GX470 maintenance

347
4-3. Do-it-yourself maintenance
4
Maintenance and care
Wheels
■When replacing wheels
The wheels of your Lexus are equipped with tire pressure warning valves and trans-
mitters that allow the tire pressure warning system to provide advanced warning in
the event of a loss in tire inflation pressure. Whenever wheels are replaced, the tire
pressure warning valves and transmitters must be installed. (→P. 337)
If a wheel is bent, cracked or heavily corroded, it should be replaced.
Otherwise, the tire may separate from the wheel or cause loss of handling
control.
■ Wheel selection
When replacing wheels, care should be taken to ensure that they
are equivalent to those removed in load capacity, diameter, rim
width, and offset.
Replacement wheels are available at your Lexus dealer.
Lexus does not recommend using:
• Wheels of different sizes or types
• Used wheels
• Bent wheels that have been straightened
• Lexus wheels with after market chrome plating
■ Aluminum wheel precautions
● 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 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.

348
4-3. Do-it-yourself maintenance
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 loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer or other qualified service
shop.
●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.

349
4-3. Do-it-yourself maintenance
4
Maintenance and care
Air conditioning filter
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Turn the engine switch to the “LOCK” position.
Open the glove box and
unhook the clip.
Push in each side of the glove
box to disconnect the claws.
Remove the filter case.STEP1
STEP2
STEP3
STEP4

350
4-3. Do-it-yourself maintenance
■Changing interval
Inspect and replace the air conditioning filter according to the maintenance sched-
ule. In dusty areas or areas with heavy traffic flow, early replacement may be
required. (For scheduled maintenance information, refer to the “Warranty and Ser-
vices Guide/Owner’s Manual Supplement/Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.
Remove the air conditioning fil-
ter from the filter case and
replace it with a new one.
The “↑UP” marks shown on the
filter and the filter case should
be pointing up.
STEP5

351
4-3. Do-it-yourself maintenance
4
Maintenance and care
Wireless remote control battery
Replace the battery with a new one if it is discharged.
■You will need th e following items:
● Small Phillips-head screwdriver
● Lithium battery (CR1616)
■ Replacing the battery
Remove the screw and cover.
Push the cover in the arrow
direction.
Remove the module.
Remove the 2 screws to take
out the lid.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

352
4-3. Do-it-yourself maintenance
■If the battery is discharged
The following symptoms may occur.
●The wireless remote control will not function properly.
●The operational range is reduced.
■Use a CR1616 lithium battery
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by a Lexus dealer.
●Dispose of used batteries according to the local laws.
CAUTION
■Removed battery and other parts
Keep away from children.
These parts are small and if swallowed by a child they can cause choking.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other components inside the electronic key.
●Do not bend the battery terminals.

353
4-3. Do-it-yourself maintenance
4
Maintenance and care
Rear seat entertainment system controller
■If the batteries are discharged
The following symptoms may occur.
●The rear seat entertainment system control will not function properly.
●The operational range is reduced.
■Use 3 AA batteries
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by a Lexus dealer.
●Dispose of used batteries according to the local laws.
Replace the batteries if they are discharged.
■Necessary items
3 AA batteries
■ Replacing the battery
Remove the cover.
Remove the depleted batteries
and install the new batteries.
STEP1
STEP2

354
4-3. Do-it-yourself maintenance
CAUTION
■Removed battery and other parts
Keep away from children.
These parts are small and if swallowed by a child they can cause choking.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other components inside the remote control.
●Do not bend the battery terminals.