Quote:
Originally Posted by CrazyOneToo
... This issue with... the key not unlocking or locking the doors has only happened twice so far.
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If the remote unlocking/locking of the doors is isolated from the rest of the issues you're having...then it could be a GM III thing or components associated with remote locking (FBZV) which takes a slightly different route than using the physical key in the door lock cylinder.
The remote fob sends a 315 MHz signal to an antenna embedded in the left rear cargo window (on sedans its the rear windshield...but on Tourings/SAVs it's in the rear left cargo window)...then it goes on to a receiver (I believe in the tailgate spoiler area)...which then ends up at the GM III where a command is sent to lock/unlock the doors and arm/disarm the anti-theft alarm siren system (DWA).
Again, if the locking/unlocking issue can be isolated from the electrical issues...take a look at the connections to the FZV antenna in that rear window to make sure it hasn't become loose...and also take a look at the FZV receiver to make sure there's no corrosion or water infiltration.
In the images below...you can see the location of the FZV antenna (embedded in the rear left cargo window) on BMW's Tourings/SAVs/SUVs...and in the 2nd pic you can see the location of the FZV receiver amp (slightly different location than the Tourings). But check the connections at both the antenna (look behind the insulation) & the receiver: