An impact absorbing airbag module is disclosed. The module includes a chassis that holds an inflator, and is connected to a mounting system. The chassis includes a forward side wall, a first lateral side wall, a second lateral side wall, and a rear side wall. One of the side walls includes a deforming zone that includes a first angled portion and a second angled portion. In some cases, the deforming zone extends around the periphery of the chassis.