Seat Belt Buzzer

[Ultrasport12]

On my 2008 both the belt retractors and the seat belt buckles connect to the air bag system.
I am not sure exactly when they buckle pyrotechnics started but I think it was about 2002 or so.

[86Scotty]

Originally Posted by BIGVANS

Just don’t forget these are “Active Restraints” so don’t interfere with the buckle side in case the charge goes off and pulls the belt in about 3 to 5 inches.

I have a couple of these. I wonder if they're worth anything? They aren't blown, just removed.

[carringb]

Originally Posted by Viejo

I thought the seat belt retracter was just a mechanical inertial lock; the same device that grabs the belt when you jerk it out fast or try to put it on while driving on a bumpy road.

When did they start putting this active pre-tensioning system in vehicles?

1997 I believe. You are correct about the "retractor". The explosive device is called the "pre-tensioner". They are very effective, without really any consequence. Until recently, only luxury cars got them.