Air Suspension Repair in Vantaa

When air suspension needs servicing

Air suspension has become common on premium vehicles and gives the driver the ability to adjust ride height and damping. Mercedes-Benz, BMW, Audi, Land Rover and Volvo all use it, particularly on their SUVs, and on some cars it's also fitted to saloons. The system is complex: a compressor generates compressed air, a valve block directs the air to the right location, and each wheel has its own air spring replacing the conventional coil spring. The most common fault is an air spring splitting. A long-serving air spring gradually "loses" pressure overnight – in the morning the car has sagged on one side and the compressor has to run for a long time when you start the vehicle. Ageing of the rubber sleeve is behind this; the rubber becomes brittle under UV and frost and develops porosity. The second frequent failure is the compressor itself. It contains an electric motor that, under normal use, lasts 8–10 years, but if the system has leaks the compressor has to cycle far more often and wears out much sooner. In the worst cases the compressor's fuse blows or the motor burns out internally, the system stops working entirely – the car sinks onto its bump-stops and won't rise.