2004 with a flat rear suspension. 200k but runs very well. No check engine light or other symptoms. Read about height/leveling sensor and replaced. Rode like new for 2 months and started all over again. Checked relays, replaced compressor after tapping in side and compressor started. Figured brushes were bad or corroded. While checking out noticed very small leak in right side air bag (ordered 2 new bags today). Problem is intermittent so am wondering if it is the height control selinoids (reservoir assembly) or computer issue. New Compressor does kick on periodically but ride is still horrible. Would change to springs but the vehicle me zero so felt it is worth the money....but starting to get concerned over the aggravation!!! Any and all help would be greatly appreciated.

 

There have been cases where the leak in the bag was hidden by the compressed folds of the rubber, so the leak was intermittent.
Change the bags and see what happens.

Chip H.