Originally Posted by MikeTangas

A broken from flex disc can cause the bag to deploy. When it suffers a catastrphic failure the driveshaft will hit the tunnel and the crash sensor is mounted to the top of the tunnel (up behind and under the stereo). Have also heard that a disintegrating flex disc can shed pieces with enough force to activate the crash sensor when chunkc hit the tunnel just right.

Since the bag and ETR's deployed I am fairly certain your sensor took some sort of hit.