Directional Tires; The Tire Pressure Warning System - Lexus IS250 2009 Service Manual

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4-3. Do-it-yourself maintenance
2WD models with 18-inch or directional 17-inch tires
Tires cannot be rotated.

The tire pressure warning system

n
Your Lexus is equipped with a tire pressure warning system that uses
tire pressure warning valves and transmitters to detect low tire infla-
tion pressure before serious problems arise. ( P. 385, 393)

Directional tires

326
Tire direction marks
The tire sidewalls are marked with
arrows indicating the rolling direc-
tion of the tire. If mounted on the
wrong side of the vehicle, direc-
tional tires will perform poorly.

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