Repair a broken safety belt that does not retract when you unbuckle it by replacing the retractor. Belts that do not retract are a sign of a safety issue, and the belt might not provide adequate protection in the event of an accident.
Locate the access door for the belt by following it down the doorpost from the attachment for the shoulder harness. Near the bottom of the post is an access door. Pop the screw covers and turn the screws counterclockwise to loosen them, then pull the door out and set it aside.
Use adjustable pliers to remove the retractor mounting bolt, adjuster bolt and lower seatbelt mounting bolts. Pull the retractor down and off the seatbelt. Thread the belt into the new retractor, and slide the new unit toward the mounting post. Replace all the bolts you removed earlier.
Align the retractor with its mounting bracket. Insert the bolt and tighten it with the pliers. Slide the door cover back into the opening, insert the retaining screws, and turn them clockwise to tighten the door.
The retractor has a sprocket and horizontal bar. When it is working correctly, it provides some slack in the belt for the passenger. When the driver suddenly applies the brakes or the car stops abruptly due to an accident, the bar slides into the sprocket to stop movement of the belt and prevent injuries to passengers.