Description & Operation

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Accidental air bag deployment is possible. Personal injury may result. Read and follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS before working on air bag system or related components.

Supplemental Restraint (SIR) system is designed to supplement protection provided by driver-side and passenger-side seat belts. A frontal collisions of sufficient force will deploy driver-side and passenger-side air bags. Steering column and knee bolsters also absorb collision energy.

Vehicle is also equipped with a driver side impact air bag module which will deploy when a side impact of sufficient force occurs on driver-side of vehicle.

SIR system consists of Sensing and Diagnostic Module (SDM), driver-side and passenger-side air bag modules, driver side impact air bag module, driver Side Impact Sensor (SIS), SIR coil assembly and AIR BAG warning light. SDM maintains a 36 Volt Loop Reserve (VLR) energy supply to provide deployment energy for up to one minute after loss of battery voltage.