I have a 2006 X5. Last year i had the same problem over and over again. At one point my car would brake on it's own while I was driving. That was caused by a Bad Alternator. The dealer told me that if there is too much or not enough juice going into the system, the computer throws off all kinds of messages. I replaced the alternator and all light were gone. A year later I have the same problem again. However this time I have that clicking sound that everyone referred to when I turn off the car. I checked the alternator and it is working fine. I did the battery reset and that did not work. I checked the Steering Wheel Sensor and it did not work. I guess it is the Transfer Case Actuator Motor. I think I will take it to the dealer for a quick scan. Anybody know a place that sells actuators cheaper than STEALERS?
I feel like every major problem there is with this car happened to me.