2012 BMW 335xi Automatic TransFACTORY OEM SERVICE PROCEDURE

Seat-Position Sensor: Notes

The installation of the seat-position sensor is dependent on the national-market version.

In the US version, according to the regulations of the FMVSS (Federal Motor Vehicle Safety Standard), a 5th percentile woman must be distinguished from a 50th percentile man on the driver's seat. The seating position sensor detects the airbag range designed for a person with regard to the seat adjustment in longitudinal direction.

The signal of the seat position influences the time-delayed activation of the second stage of the gas generator (driver's airbag).

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.