Safety Belt Buckle Pretensioners
WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
As part of the SRS, the safety belt buckles are equipped with pretensioners. The safety belt buckle pretensioners removes excess slack from the safety belt webbing. The pretensioners are activated by the RCM when the module detects a crash event force exceeding a programmed limit.