Seat Belt Pre-Tensioner

Ever wonder what a seat belt Pre-tensioner does in the event of a crash? Well, your about to find out.

[@raynic1173]

FYI, the are several other types of seatbelt "pre-tensioners". This here is a pyrotechnics buckle type.

[@roycerannard4251]

Nice vid. Looking to buy a new car with this as a feature and had no idea. Cheers mate.

[@jrm163]

Did you happen to cut the black part (the cylinder) open? I suspect it’s just a strong spring inside, which is compressed by default.

[@markcarr5142]

The black part is actually a pyrotechnic charge. When activated, it ignites a charge that explodes, but held within the black cylinder.

[@andreiandy679]

Thanks for this video.Now i know how a seatbealt works.5 *****.

[@stoneyswolf]

Cut the cable an you got a one shoot gun.

[@TravisHeinze]

So it's designed to tighten the seatbelt?

[@sureshb7846]

awesome. Did you use 12V to deploy?

[@levithan9]

Sure did.

[@alancarrington4888]

Suresh B

[@mehatestaxes]

LOL. Boys will be boys.