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4-3. Do-it-yourself maintenance
■ When to replace your vehicle’s tires
Tires should be replaced if:
● You have tire damage such as cuts, splits, cracks deep enough to expose the
fabric or bulges indicating internal damage
● A tire goes flat repeatedly or cannot be properly repaired due to the size or
location of a cut or other damage
If you are not sure, consult with your Lexus dealer.
■ Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered,
the tir
e pressure warning system will not work properly. After about 20 minutes, the
tire pressure warning light comes on after blinking for 1 minute to indicate a system
malfunction.
■ Tire life
Any tire over 6 years old must be checked by a qualified technician even if they
h
ave seldom or never been used or damage is not obvious.
■ If the tread wears down below 0.16 in. (4 mm) on snow tires
The effectiveness of snow tires is lost.
■ Low profile tires (245/40R18, P245/40R18 and 245/40ZR18 tires)
Generally, low profile tires will wear more rapidly and tire grip performance will be
r
educed on snowy and/or icy roads when compared to standard tires. Be sure to
use snow tires or snow chains on snowy and/or icy roads and drive carefully at a
speed appropriate for road and weather conditions.
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