Shop 1999 Buick Century Spring. Bumper. (Rear). 2WD, rear axle. 4WD, rear axle. Suspension Coil Spring Springs, Failure, Prone - OEM Buick Part # 15712438

A component (mounted in the center of the Spring) which cushions the Spring as it is compressed. Rubber pad or block that contacts the leaf Spring when the suspension is over compressed. Axle. seat. Auxiliary. Coil Damper. Leaf. Stopper. Vibration Damper. Included with: Frame assembly.

Leaf Spring BumperCoil Spring Damper

2WD, rear axle. 4WD, rear axle.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local service department to have your suspension system evaluated.