BMW 51353448251 Rear Left Window Regulator

Disconnect the regulator and the motor together as a single system to be released and, if necessary, split on the bench. Remove the front panel and furthermore remove the negative terminal wire from the battery. Pull off the vapor barrier on the door without ripping it, if the barrier is ripped it should be replaced in a bid to avoid water seeping in. Pull the window out of the door and open up the window motor to disconnect the electrical harness. Once all the fasteners have been undone, turn the regulator and feed it right out of the door cavity. For installation reverse the removal process; be sure to position wiring harnesses out of moving window paths, new wire ties if necessary. Ensure that the vapor barrier is well closed so that there is no water leakage and switch on the window after replacing the battery.

Remove the window regulator and motor as one unit, separating them on the bench if necessary.