Is anyone able to help. My 840ci wont start unless I jump start it i need to do this every time has anyone had this problem before?
Always change both batteries even if one appears good. Signs of general module trouble can be battery drain, clicking relays in the boot, even windows not working or in some cases working on their own even if the car is not in use. I would say change the other battery for a brand new one of the same brand as the one you already replaced.I only changed one the other was fine and working been advised it could be the general module