Our Oldsmobile Bravada Heavy Duty Air Spring Bag will replace the original Rear Air Spring. Suspension Air Spring Bag failure is usually caused by dry rot, due to old age, or gases in the atmosphere degrade the rubber from the outside. If Air Spring Bags are not replaced on time it will cause Air Suspension Compressor Failure. The Heavy Duty Air Spring Bags have an upgraded design. We use a tapered bladder & crimp rings instead of the loose-fitting snap of the original Air Spring Bag design, making them more durable and dependable.