In an impact of sufficient severity, the airbag sensing system detects that the vehicle is in a crash. In the case of a roof-mounted rollover airbag, the sensing system detects that the vehicle is about to roll over or has been in a severe frontal impact or a moderate to severe side impact. The sensing system triggers a release of gas from the inflator, which inflates the airbag.

The inflator, airbag, and related hardware are all part of the airbag modules inside the steering wheel and in the instrument panel in front of the right front passenger. For vehicles with roof-mounted rollover airbags, the airbag modules are located in the ceiling of the vehicle, near the side windows.