What are the seat belt pretensioners?
Your seat belts are much more advanced than what you might expect. They’re more than just webbed belts that hold you in place statically. They’re dynamic components of your safety system. One of the most important parts of your seat belt system is the pretensioner. There’s one on the driver front seat belt and the passenger front seat belt.
The pretensioners are responsible for tightening the seat belt after the retractor lets the belt out a little bit during an impact. This holds you more tightly in the seat and provides better safety during severe impacts.
The seat belt pretensioners should be inspected after all accidents, and replaced if necessary (they’re designed only for one-time use).
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