Driver Air Bag Module

NOTE: Variation in the driver air bag module deployment is determined by the timing of the first and second stage ignition signals. This facilitates adaptation of the stiffness and timing of the air bag module to optimize occupant protection.


The driver air bag module is controlled by the RCM which chooses between first or second stage deployment, depending on the occupant position and the crash severity. To reduce the risk of an air bag module induced injury to a driver that is positioned close to the steering wheel, the air bag module deploys radially. It has a non-azide propellant that reduces particulates and effluents. It consists of a twin stage inflator (as opposed to a single stage inflator) with separate chambers for the two inflation stages, each being independently activated by the RCM. It has two air bag electrical connectors that have foolproof mechanical keying and are color coded to the respective connector on the inflator.