Because of the complexity of the clutch mechanisms and hydraulic control systems, and the need for specialized tools to overhaul an AT, this work is not usually performed in a home garage. Therefore, this Chapter includes only general descriptions of procedures for troubleshooting, routine maintenance, adjustment, and removal and installation of the transmission.
If the vehicle needs a general repair, it should be left to the specialists of the BMW dealership or transmission repair shop. To save money, you can remove and install the transmission yourself, but keep in mind that most troubleshooting tests require the transmission to be in the vehicle.
If you decide to replace the transmission with a new or remanufactured one, first make sure that it is suitable for your car. The transmission identification plate is located on the left side of the casing, just behind the selector lever.