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      03-04-2019, 11:18 AM   #12
paloalotpeter
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Drives: 2009 335d
Join Date: May 2010
Location: Palo Alto, CA

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Just to let any other people who might be dealing with this - the problem was finally traced to the passenger side drain under the hood. I thought I had unclogged it but the shop I took it to blasted it with a high pressure air hose and that fully unblocked it. It seems the water was coming in, snaking down the front passenger door then running into the rear passenger footwell.

Thanks to everyone for the help and suggestions.
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