I just got the car back this morning. Indication was that it was a bad fuel pressure sensor and/or feed line (didnt have time to read it all). 20 miles later, the light is back on again and my frustration grows. I picked up the car last week and haven't had it for over a day without a check engine light. If I wanted an X3 loaner, I would have bought an X3. Who knows what it is this time, but I think its ridiculous that I can't return this vehichle given that the service department will soon put more miles on it than me. Took it in with 170 miles and it had 217 on it this morning...