One More Note
On this subject, I too have had air suspension issues while I owned my '07 Expy--after some extensive reading I learned a few maintenance tips for those who have the self-leveling suspension. Personally, I had my last air-shock problem that cost an estimated $1200 to fix, but also had an engine decide to fail (at least start tapping/knocking noises--$8K to fix) at the same time so I decided to just give up and buy a new Expy (without self-leveling). Anyway, here's what can be done to possibly extend the life of the air suspension (while it's working):
- Keep self-leveling suspension turned off unless towing
- Check for signs of an air leak--such as the level going down
- Turn on the self-leveling every month or so--if the compressor stays on for a while, you may have a leak. If the car raises with the compressor on, you may have a leak. In either case, you may want to get your air-shocks checked and replaced, or see how long you can go with this routine. Changing shocks is cheaper than changing the compressor. If a leak persists, you can burn out a good compressor (been there, done that--twice).
I was just looking into converting to struts when my engine started to go--I suppose that was good timing.