2004 Saab 9-3 Owner's Manual - Page 229

Car care 229 Automatic tire pressure monitoring (option, certain variants only) WARNING The system is intended to aid the driver. The driver is always ultimately responsible for ensuring that the tire pressure is correct. The pressure monitoring system consists of a sensor in each wheel, a detector in three wheel housings and a receiver. The sensors are located inside the wheels directly adjacent to the air valves. Tire pressure information is sent wirelessly to the receiver. The system checks the tire pressure when the car is travelling over 18 mph (30 km/h). The system is "self-learning", which means that the position of the wheels can be changed without requiring adjustments to the monitoring system. The spare wheel does not have a sensor. The sensor batteries have an average life of 10 years. The batteries cannot be changed but require the sensor units to be replaced. The system does not warn if a tire is overinflated. Valve with sensor If the tire pressure drops If the tire pressure drops 0.3 bar (4 psi) below the recommended pressure, the SID will issue a warning as to which tire is affected. Tire pressure low, front left. Check tires. Adjust the tire pressure as soon as possible. NOTICE Great care must be taken when changing tires so as not to damage the sensors that are integrated in the valves.