I've noticed that my car likely has a slow leak. Parked for 24 hours, the driver front corner sits about 2 inches lower than the day before, and the pax front corner sits 1 inch lower. I've replaced the struts and the valve unit. However, the problem seems to be getting worse. Before if I left it a week, the car would still be no lower than 1-2 inches, now the driver front corner wheel is tucked into the fender. If I unlock and relock the car (without starting it, the pump is capable or raising it back up within a few seconds). If I start the car up (after it's gone low from sitting), it will take 10 seconds to raise up but still gets back up to the right height.

I keep leaving the car at the garage for weeks on end and they can't seem to find the problem but they have a lot of experience with Bentleys and other exotics. I'm going to take it in for a 4th time but wondering if any of you would have any other suggestions? Seems I've already replaced the usual suspects.

 

Hi, had similar issue with my X5. Replaced pillows, situation got worse. Turn out it was faulty new pillows. Ordered original from BMW fitted, no sagging if left 3 weeks +.

 

You said your replaced your air structs and still have leaks? It is possible your new unit is fault because I had the same issue.

 

My BMW X5 had faulty air springs. To save time i bought them on ebay, replaced and situation was worse then before.