First nice day of the year so I hit the pull-a-part. Found what has to be the last unmolested E53 left-rear door vapor barrier on the planet and jeez, what a mess getting that butyl adhesive to let go. WD40 dissolves it (even more of a mess) but I still managed to tear it a little. I'll install it when I'm back next weekend.

Hoping this solves the water intrusion into the rear seat floor... I've never had that door card off so I have no idea if the original barrier is intact (or even present).

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