BMW E61 rear window won't open or opens by itself
Why does the BMW E61 rear window not open or open by itself?
Usually the fault is in the rear window microswitch, which is a known typical fault. Moisture breaks the switch, so the window can open while driving. Another common cause is broken wires in the tailgate hinge channel.
Why does the battery drain when the rear window is faulty?
A damp microswitch keeps the car awake, so it does not enter power-saving mode. The battery drains overnight. Replacing the switch has fixed both the window opening and the current drain. The switch's part number is 61 31 9 218 995.
How is the E61 rear window opened without power?
1. Remove the tailgate inner trim and pull it slightly open. 2. Push a long screwdriver or steel rod into the mechanical release hole of the window lock. 3. Press, and the lock releases and the window opens. This works even when the release switch or the wiring is broken.
Why can replacing the microswitch be awkward?
The aluminium sleeve on the wiper shaft can be stuck around the switch and the shaft, and it will not fit through the hole in the glass. The new switch's centre hole is smaller, so the sleeve is not needed and can be carefully cut off.