I have 2005 bmw x5 4.8 is.... the front passenger side is sagging.... an when you start it it doesn't pump it's self up ..... and when you try to raise or lower the suspension with the switch... the light just blinks and nothing happens.... im suspecting the front right air spring is to blame... is there another or explanation?

SOURCE: 2001 audi allroad air suspension wont lower

I had the same problem, I went to my mechanic and they said that the system has shut itself off due to a problem the computer has seen, in my case it was a selinoid in the pump which released air had failed and had to be replaced, unfortonatly you can not buy the selinoid seperately and would have to replace the entire pump, I was lucky though because he has a spare pump that he pulled off another car which was blown but the selinoid was still good. It took them about 4 hours to find the problem but that was my experiance. DO NOT TAKE IT TO THE DEALER they will charge you for 4 new air bags and a new pump they quoted me almost 5000 Dollers and i got mine fixed for $500