Shock absorbers and coil springs help absorb and direct road force, maintaining wheel oscillation, jounce and rebound. The air springs are simply tough rubber and plastic bags inflated to a certain pressure and height to mimic the coil springs.
Air Suspension Repair
Air Suspension Repair As mentioned previously, one option is to repair the system by replacing the damaged air Suspension units with new units. The benefits of this option are that it restores the vehicles air suspension to its original condition and functionality. Cost is considered one of the downfalls of replacing the air Suspension units with new parts. It is highly recommended that you replace the compressor and the dryer assembly while doing the job to ensure that the replacement air Suspension unit will last. Primary Components of Original Air Suspension Systems:

Front Air Suspension Shock AbsorbersFront Air Suspension Air BagFront Air Suspension Mounts and O-RingsRear Hydropneumatics Air Suspension Shocks Air-Over-HydraulicRear Air Suspension Air BagRear Air Suspension Mounts and O-RingsAir Suspension Air CompressorAir Suspension Air Pressure Accumulator TankAir Suspension Air LinesAir Suspension Level SensorsAir Suspension Control Module Controls Warning Light System
Controls Air Pump Compressor Functions Reads Information from Suspension Level Sensors to Properly Distribute Air
What does air suspension do?
Air suspension is a type of vehicle suspension powered by an electric or engine driven air pump or compressor. This compressor pumps the air into a flexible bellows, usually made from textile reinforced rubber. The air pressure inflates the bellows and raises the chassis from the axle