Lexus GS430 User Manual page 577

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The effectiveness of snow tires is lost if the tread

wears down below 4 mm (0.16 in.).

If you have tire damage such as cuts, splits, cracks

deep enough to expose the fabric, or bulges

indicating internal damage, the tire should be

If a tire often goes flat or cannot be properly repaired due

to the size or location of a cut or other damage, it should

be replaced. If you are not sure, consult with your Lexus

If air loss occurs while driving, do not continue driving.

Driving even a short distance can damage a tire beyond

Any tires which are over 6 years old must be

checked by a qualified technician even if damage is

not obvious.

Tires deteriorate with age even if they have never or

seldom been used.

This applies also to the spare tire and tires stored for

D When you purchase new tires, consult your

Lexus dealer. If you change from run−flat tires

to standard tires, a spare tire should also be

D When the tires must be repaired or replaced,

have them repaired or replaced by Lexus dealer

or authorized dealer. The tire pressure sensors

will be affected by the installation or removal of

D When the tires must be replaced, replace the

grommets for tire pressure sensors as well.