Hello everyone,I recently purchased a 2007 x3 at a very low price wish some issues so the most important is a sound coming from the rear differential while running. It sounds just like a bad bearing however the weird part is that whenever I turn the car off I can hear fro this differential a sound just like an electric small motor still running (even car is off) this sound lasts for about 4-5 minutes then it stops. Can somebody help?. I was wondering if the problem is the full differential would there be a way to disable the 4x4 system? Doesn't matter if the car is just fwd as long as it drives an I don't have to break the bank with a repair. Help will be appreciated.
