Seat Track Position Sensor
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The seat track position sensor indicates to the RCM the position of the driver seat, forward or rearward. The RCM uses this information in determining the deployment of the dual-stage driver air bag module.