Our 03 Nav is due for a little air ride TLC. I have a ride height sensor that sticks and when the arm pops off it will want to sit on the ground more or less. It is a rare thing and hasn't been a priority except it's now cold and did it the ither day. Easy temp fix but it's coooold on the ground. The compressor is also a little noisy but after 19 years I'm not surprised. Arnott makes great replacements, know a few that have used them with none having yet to fail. O rings and solenoids go bad on everything that has them at some point. Air ride requires a but of extra work but my wife really likes it as the kneel height it drops to makes it much easier for her and the kids to get in/out. It rides much smoother than our 03 expy as well.
I'd vote to keep it unless you don't really care about the "finer things" it offers, only having it in the rear is mostly for self leveling, not so much with regards to ride comfort, it probably helps the people more in the back if anything. If its just for trailering then a spring conversion may be the cheaper option, depending on what exactly you go with. There is a decent 3rd party market for the air springs and the like now. No more forced to spending $700 per wheel
