Lexus IS250 2006 Owner's Manual page 298

4-3. Do-it-yourself maintenance
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The tire pressure warning system
Your Lexus is equipped with a tire pressure warning system that uses
tire pressure sensors to detect low tire pressure before serious
problems arise. (P. 335, 339)
Before removing the tire from the wheel, remove the system' s tire
inflation pressure sensor. Be careful not to damage the sensor when
removing and installing the tires.
Turning directional tires
Installing tire inflation pressure sensors
When replacing tires or wheels, tire pressure sensors must also be
installed. Tire pressure sensors can be installed in any of the following
three ways:
● Sensors can be removed from the old wheels and installed on the new
wheels.
280
Tire direction marks
The tires listed below are direc-
tional. The tire sidewalls are
marked with arrows indicating the
rolling direction of the tire. If
mounted on the wrong side of the
vehicle, directional tires will per-
form poorly.
Tire size
Front
225/45R17 90W 245/45R17 95W
225/40R18 88Y 255/40R18 95Y
Rear