Safety & assistance
Seat-belt pretensioner
Removes belt slack during defined safety events.
In a buckle, retractor or belt anchorage according to design.
A triggered mechanism tightens the restraint path under controller command.
A fast emergency take-up mechanism for the belt.
A restraint fault or crash history needs the prescribed inspection and replacement procedure.
Inspect and service using model-specific guidance, especially after a collision; warning lights require diagnosis.
Calibration, matched modules and post-collision work may dominate cost. An illuminated warning does not identify a replaceable part.
A deployed BMW pretensioner is not repaired by clearing a fault code.
BMW safety systems according to market, model year and option package.
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