Passenger Seat Occupancy Sensor - 2011 528i

The passenger seat occupancy sensor in your 2011 BMW 528i (F10 chassis) integrates into the seat cushion to detect occupant presence for airbag deployment logic. Common BMW part numbers include 65 77 9 237 416 and superseded 65 77 9 204 590, though specific configurations vary between standard and sport seating profiles. Interchange spans 2010-2016 F10 sedans and F11 Touring wagons regardless of N52, N20, or N55 engine variants. When junkyard hunting, verify the TE Connectivity casting marks (typically 5WK4-series) on the control module and inspect the foam pad for tears or moisture damage. Installation requires complete seat removal and careful transfer to avoid creasing the sensitive pressure mat embedded in the cushion foam. Never fold the mat sharply. Post-installation coding via BMW ISTA or equivalent scan tool is mandatory to clear airbag faults and recalibrate sensor thresholds for proper occupant weight classification, typically indicated by persistent airbag warning lamps.