2001/2002 E46 Compact
I used to have a problem where, after a power wash, my key fob wouldn't work for a while, no lock/unlock, no trunk release (presumably until water evaporated from somewhere), only the manual key hole would work or the central locking button inside, and when this happened in winter, I had this problem persist for weeks, in summer it'd only last for a few hours.
Now after one wash it seems to have had enough, and something has broken permanently, since it didn't work after the wash, and still doesn't 2 months later (tried both keys).
I took out the general module from behind the glovebox suspecting it to be bad or flooded- but there's no sign of water damage anywhere, it all looks in order and there's no residue or otherwise off-looking things on the PCB or it's cover, it looks brand new. The entire compartment behind the glovebox has no signs of water intrusion.
So I know that my problem is related to water getting in somewhere where it shouldn't, and that causes my key fob to stop working, and the relay inside the general module isn't the problem.
What else could be getting flooded and corroded to cause this to happen? Is there some sort of antenna/receiver that could've stopped working, maybe one of the lock actuators? My biggest fear is that it's exposed wiring corroding somewhere, as that'd take forever to find.