Suspension
Air spring
Supports vehicle load using pressurized air.
At suspension corners using air suspension.
Air volume and pressure support weight while valves and sensors regulate level.
A strong air cushion whose height can be managed.
Sagging after parking or frequent compressor operation can indicate leaks or level-control faults.
Wear is condition-based and strongly affected by roads, loads, impacts and seals. There is no universal replacement mileage.
Links and bushings are smaller repairs than complete adaptive struts or air-spring systems; alignment may be needed after work.
BMW air suspension can be rear-only or on both axles depending on the model and options.
BMW passenger cars and SAVs; spring, damper and axle design depend on chassis and options.
Same system