Just been reading on the M buyers guide thread about the vanos and getting the bolts changed etc. Can this be done under warranty still and is it worth getting a stealer to do it under warranty? Mine has hit 67,000 miles and not had them replaced afaik unless done on a service and didn't know about it. Just wondering what everyone has done and would advise to do. I'm a bit scared of letting a main dealer near the car after recent experiences but if it's a warranty item i feel they should stump up the money to do it unless it's not going to be the better solution.