Seat Belt PRETENSIONERS
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
The front seat belt pretensioner is integrated with seat belt retractor assembly. Pretensioner contains a pyrotechnic device, that when signaled by the air bag diagnostic monitor, deploys to remove excess webbing from seat belt system, tightening webbing around occupant.