The air suspension system has failed on my luxury 2004 lincoln navigator (124,000 miles). this appears to be a common failure for this vehicle based upon my online research. there are companies that sell kits to replace the entire system as it is apparent that not failing is not an option. please see the strutmasters website (http://www.strutmasters.com/). this is an expensive repair/replacement and appears to be related to defective and unsafe parts. however there is no record of any recalls or change in the manufacturing process. help!!! *tr