Supplemental Restraint Systems

Occupancy Detection System Inside the seat, you will find a pressure sensor, a silicone-filled "bladder", and an electronic control unit (ECU). When someone sits on the seat, the pressure sensor signals the occupant's weight to the ECU. The ECU then sends that data to the airbag, which has its own control unit.

Based on that information, the vehicle's computer turns the passenger airbag on or off.