When I left a Tesla Service center a couple of months ago after a complete tire swap-out for my MX 90D, I noticed an "Air Suspension Needs Service" warning. But after I made a stop on the way home, the warning disappeared. Then I saw it again several times, and it rarely stayed on for more than one drive. I looked at it as an irritant more than anything, until recently it displayed continuously and wouldn't reset. Then I noticed that the car was unusually springy when going over uneven road surfaces. A call to Tesla Service suggested there was no real urgency -- that I could bring it in a few weeks later at the next available service appointment at the local SC. My visit to the Service Center brought me very bad news: All four air suspension modules had leaks (how do all four fail at the same time?! -- I drive only relatively smooth roads) The main suspension air pump failed because it was overworked compensating for the leaks. My car, with 52,000 miles on the odometer, is JUST BARELY out of warranty. The repair damage: $5,100, give or take. I feel like I have no choice but to fix it, given the ride of the car is horrible in its current condition. My only hope is that the first error indications show up in the car's logs (Tesla says they'll look through the logs), since they occurred BEFORE the warranty mileage had passed. Let this serve as fair warning, though. Take the "Air Suspension Needs Service" warning seriously -- especially if you are nearing the end of your warranty. This is a very expensive repair.