I was just about to start taking apart my 02 745i to fix my dead windows. For no apparent reason, my drivers side controls for mirrors, windows, and shades all stopped working yesterday. Looking through the forums, they all talked about replacing motors and window regulators which could be as much as 2k. One last ditch effort, let’s reboot the car.
I disconnected the battery for 1 min to cycle the computers and whatever other magic is involved in the windows, and voilà everything works again. Just thought I would put this out there in case someone else is about to take their BMW to the stealer and be charged way too much.