Warning lights Error? Please help!
We have a 2008 X3 that has had four batteries BMW-installed by the dealer fail after 3 to 4 months in turn. The security system 'goes to sleep' as it should at the dealership. Although BMW replaced the later batteries under warranty, we are out $500 in shop charges with no idea of the cause.
Our local mechanic (whom I trust) just did PA inspection. After a tune-up the car did great on emmissions tests. For two days. Now, with 93 octane, it is running OK, but with each drive one or more warning lights appear on the dash for long parts of the drive, without apparent problems in the car. The lights coming on randomly??? include ENGINE, BRAKES, COOLANT LEVEL, ALTERNATOR, and SERVICE ENGINE SOON.
My mechanic thinks the onboard computer may be bad and recommends I try to get one from a wreck.
Any insight or tips would be much appreciated.