2002 BMW 745LiFACTORY OEM SERVICE PROCEDURE

Vehicle Center Satellite (SFZ): Notes

The SFZ is located on the transmission tunnel, under the front center console. The SFZ contains a transverse and longitudinal acceleration sensor.

Fig 1: Identifying Vehicle Center Satellite (SFZ)
G03391537Courtesy of BMW OF NORTH AMERICA, INC.

The vehicle center satellite, center is not responsible for deploying any airbags or pyrotechnic devices.

The SFZ is connected to the SIM via the byteflight.Β  The power supply of the satellite is also from the SIM and it is buffered by the memory backup capacitor. In sleep mode of the bytelightΒ  , the power supply of the SFZ is deactivated by the SIM. The watchdog function is run via the SIM.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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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