Toyota 2008 Camry Owner's Manual page 362

4-3. Do-it-yourself maintenance
When to replace your vehicle's tires
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Tires should be replaced if:
You have tire damage such as cuts, splits, cracks deep enough to
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expose the fabric or bulges indicating internal damage
A tire goes flat repeatedly or cannot be properly repaired due to the
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size or location of a cut or other damage
If you are not sure, consult with your Toyota dealer.
Replacing tires and wheels
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If the ID code of the tire pressure warning valve and transmitter is not
registered, the tire 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
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Any tire over 6 years old must be checked by a qualified technician even
if it has seldom or never been used or damage is not obvious.
If the tread wears down 0.16 in. (4 mm) or more on snow tires
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The effectiveness of snow tires is lost.
If you press the tire pressure warning reset switch accidentally
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If initialization is performed, adjust the tire inflation pressure to the speci-
fied level and initialize the tire pressure warning system again.
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