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A Rear Auto Leveling Air Suspension Air Spring Bag is a critical component of a vehicle's advanced suspension system. Unlike a traditional coil spring that provides a fixed level of support, an air spring bag uses compressed air to support the vehicle's weight. This allows the system to automatically adjust the ride height to compensate for heavy loads or when towing, ensuring a consistent level ride and maintaining proper alignment. A failing air bag can lead to a noticeable sag in the rear of the vehicle, a bouncy or unstable ride, and a continuous compressor running. Common failure points are leaks in the air bag itself or a dry-rotted rubber. This product is a direct-fit replacement engineered to restore your vehicle's original suspension capabilities, providing a superior and comfortable ride while ensuring safe handling.