Strange window operation

[michaelhinrichsen]

Sounds like there may be a problem with the switches in the drivers door latch/lock. If the switches are getting funky it might act like the key was in the switch held to the unlock position, opening her all up. This lifespan of switches is why BMW went away from regular microswitches in door latches to hall effect on the newer models.

I have an E53 that occassionally does this. Weasel, please elaborate on how to nail this one down. Mine also opens the rear hatch, then the light runs the battery down. Sometime the windows are all open completely and sometimes they are just cracked open a bit.

[Weasel]

Originally Posted by michaelhinrichsen

I have an E53 that occassionally does this. Weasel, please elaborate on how to nail this one down. Mine also opens the rear hatch, then the light runs the battery down. Sometime the windows are all open completely and sometimes they are just cracked open a bit.

Does it only happen under certain conditions, or just randomly... And unfortunately with some intermittent problems it is all but impossible to nail down the cause, as it can't easily be replicated and there wouldn't usually be any faults stored in anything relating to it. It takes looking at the circuit/system and figuring out the possibilities on what can cause it, then making an educated guess based on the knowledge of that system. I can say that for this not common problem it usually does end up being the drivers door latch, but there is no way to know without changing it unfortunately.