2006 Lexus IS 350 Owners Manual - Page 296

4-3. Do-it-yourself maintenance n 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 Tire direction marks The tires listed below are directional. 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 perform poorly. Tire size Front Rear 225/45R17 90W 245/45R17 95W 225/40R18 88Y 255/40R18 95Y 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: l Sensors can be removed from the old wheels and installed on the new wheels. 280