Belt and Buckle Assembly - Pretensioner
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The belt and buckle assembly pretensioner is a pyrotechnic device that removes excess webbing from the safety belt system. The belt and buckle assembly pretensioner uses the same crash sensor system as the air bag supplemental restraint system (SRS). When the belt and buckle assembly pretensioner deploys, the buckle moves downward, pulling excess webbing from the lap and shoulder safety belts.