Vibe FWD L4-1.8L VIN 8 (2004)
Seat Belt Tensioner: Description and Operation
SEAT BELT PRETENSIONERS
The seat belt pretensioner assembly consists of the following components:
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An end release buckle A buckle sleeve
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A routing cable with piston
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A piston tube
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A mounting bracket
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A gas generator
When the vehicle is in a frontal crash of sufficient force, the SDM causes current to flow through the frontal air bag deployment loops and the
pretensioner deployment loops. Current passing through the initiator ignites the material in the pretensioner gas generator. The gas produced from this
reaction rapidly shortens the seat belt buckle height. The seat belt pretensioners will deploy immediately before the frontal air bags deploy in the event of
a mild-to-severe frontal collision.