So, every once in a while my Cayenne seems to lose height on the right front corner.

No error codes, no sign of a leak(pump doesn't run, etc)

Thoughts?

 

I know you said it was inconsistent, however, I would still check out these items:

1) The first thing I would do is to remove that specific front wheel and do a visual inspection to any bent or damaged components. I would pay close attention to the "link arm" that tells the shock tower in that corner its relation to the rest of the chassis.

2) If all looks well, then I would consider having the air suspension recalibrated. You can have this done at a dealer or with a Durametric. The air level suspension recognizes that it can be "off" when making adjustments, so it has a good amount of adjustibilty per corner using the methods above.

Not sure if this will solve your issue, however, it is a start.

 

I have noticed this once on mine. I was parked on a pretty good inclined driveway with the front facing towards the street. My right rear side was higher. Haven't really noticed anything weird since then though. All my stock links were fine when I took them out. No suspension damage from what I can tell. Very odd.