When your air suspension starts to fail. The first thing that you notice is the compressor starts to come on more frequently, or you notice the vehicle lower than when you parked it the night before. The simple reason is that rubber dry rots from ozone and other atmospheric and road conditions. If you replace the sir shocks or air springs quickly. The compressor is usually saved. If this is not the case the repair can cost 2 - 10 thousand dollars to replace. A suspension conversion becomes an extremely economical repair. Typically less than $1,000 for the entire repair. Many air suspension sytems are accompanied by an electroni shock absorber. They fail beacuase the seals inside of the cylinder wear, and eventually leak out the gas or oil that gives them the ability to absorb the impact of normal driving. They typically cost around %500-$1,500 for each strut. Replacing the electronic shock with a passive non-electronic shock. Not only saves money, but is extremely reliable. www.suncoreindustries.com has been an excellent source for these types of products for Lincoln, Cadillac, Chrysler, Ford, Dodge, Land Rover, GMC, Chevrolet, Nissan, Lexus, Buick, Mercury, Oldsmobile, Pontiac air suspension parts. Air Bags, ( airbags ), Air springs, air shocks, struts, compressors, and conversion kits.