2004 BMW 745LiFACTORY OEM SERVICE PROCEDURE

B-Pillar Satellite, Left (SBSL): Notes

The SBSL is located in the left B-pillar above the seatbelt inertia reel. The SBSL contains a sensor for transverse acceleration only.

The left B-pillar satellite is responsible for deploying the drivers seatbelt tension limiter.

Fig 1: Identifying Location Of SBSL
G03391524Courtesy of BMW OF NORTH AMERICA, INC.
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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.

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