Seat Belt Tensioner: Service and Repair

72 11 041 - Removing and installing or replacing front left or right lower belt fitting (seat belt pretensioner)





Necessary preliminary tasks:
- Remove front seat Removing and Installing Left or Right Front Seat (Normal / Manual)





Warning!
Read and comply with safety regulations [1][2]Safety Precautions and General Information for handling airbag modules and pyrotechnical belt pretensioners.
Improper handling can lead to triggering of the pyrotechnical seat belt pretensioner or side airbag, resulting in injuries.

Switch off ignition!





Installation:
- Microencapsulated screws (Loctite) must be replaced and may not be reused
- Screw connection must be completed within 20 minutes (start of curing)
- Microencapsulated screws must not be retightened
- Clean thread of nut beforehand in event of repeated use





Unfasten plug connection (1) and disconnect.
Unlock plug connection (3) and pull all plugs out of plug housing (2).
Disconnect all cable ties.
Removing wiring harness.

Installation:
- Replace cable tie.
- Wires must not be under tension
- Plugs are coded and must be reinstalled in the correct sequence in the plug housing





Release screw (1).
Tightening torque 72 11 06AZ Specifications.
Remove belt pretensioner (3).

Installation:
Replace screw (1).
Belt tensioner (3) is secured through recess (2) to retaining bracket.