Suspension air compressor
Supplies compressed air for a self-leveling suspension.
In a protected body or underbody mounting location.
A compressor, air treatment and valve system supply the suspension reservoirs or springs.
A small pump refilling adjustable air cushions.
Long run time, slow leveling or a warning may originate from leaks rather than the compressor.
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.
A BMW air-suspension compressor and the air-conditioning compressor perform unrelated jobs.
BMW passenger cars and SAVs; spring, damper and axle design depend on chassis and options.