An alternator is the source of electrical power generation in your BMW X1. Failure of such a crucial component due to a worn-out belt, bad wiring, blown fuse, and defective computer could disrupt the power supply which might bring your vehicle to a halt in the middle of nowhere. So, early warning signs of a defective alternator in your BMW X1 should not be overlooked. This slide might be useful for you to know more about the factors responsible for alternator failure.