Active Suspension System Air Compressor Replacement Cost Estimate

If the air suspension is not receiving sufficient pressurized air, the air compressor will be tested for failure. First, the technician will test the air compressor electronically. They must understand if the compressor is receiving switched power, has ground, and whether the compressor motor is functional. If these are all found to be true, the compressor will need to be tested to find how much pressure it is creating. It is entirely possible for a compressor to run normally without creating air pressure. If the compressor does not function electronically or pneumatically when power, signal, and ground are present, it will be replaced.

Active suspension air compressors are connected to the vehicle both electrically and pneumatically. This means they must be disconnected from battery power, switched power, and air lines. Installation is the reverse of removal, and instruction should be followed to determine how to seal the air lines and if oil should be added to the compressor. It is important to note that some compressors are driven by the serpentine belt from the engine, but this is rare for most passenger vehicles. Also, in many cases, the compressor may be tucked away underneath the seat, trunk lining, or somewhere in the engine compartment, so referring to the service guide is necessary to locating the compressor for testing.

Any time the air suspension system is opened, it should be purged of air before reclosing the system. This will help rid the system of moisture caused by humidity and condensation. Also, this will allow the technician to monitor for debris, and take action if needed.