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Auto Rubber BMW Air Suspension Parts , BMW E70 Rear Air Spring Steel Rings 37126790078 Air Suspension Air Suspension is a type of automotive suspension that uses air springs instead of conventional steel springs. Computer-operated vents on the air springs, suspension sensors, and an onboard air compressor allow the system to maintain ride height and vary the suspension's ride characteristics. Product Description Suitable For: BMW X5 E70 Position: Rear Can be installed in the