The air bag module consists of the air bag and its inflators.
In a moderate to severe crash, the inflators fill the air bag with harmless gas to create a cushion-like restraint that helps protect an occupant from striking the vehicle's interior.
The driver frontal air bag is located in the hub of the steering wheel.
The passenger frontal air bag is located in the instrument panel, more commonly known as the dashboard.
Side-impact air bags can be located in the seat back, the door or the overhead roof rail.