Quote:
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Originally Posted by RWRice
I hear a sound in my Jetta that I was thinking may be a seatbeat pre-tensioner winding up.
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Seatbelt pre-tensioners are usually small explosive charges that only fire when the safety system tells them to do so! When they fire - they pull the seat belt tighter to stop you moving as far!
Most seatbelts also have a fold sewn into the webbing which unfolds when a certain amount of force is applied to the seatbelt! This helps prevent your body from decelerating too quickly in an accident!
Sorry for being a bit
but kinda interesting and important!