The Supplemental Inflatable Restraint (SIR) system (also called the air bag system) helps supplement the protection offered by the driver and front passenger seat belts by deploying an air bag from the center of the steering wheel and from the top of the right side of the instrument panel.
The air bag deploys when the vehicle is involved in a frontal crash of sufficient force up to 30 degrees off the centerline of the vehicle. To further absorb the crash energy there is a knee bolster located beneath the instrument panel for both the driver and the passenger, and the steering column is collapsible.
Beginning in 2000, side impact air bags were introduced on selected models. The side impact air bag system consists of the following additional components that interface with the inflatable restraint Sensing and Diagnostic Module (SDM):