Water in footwells???

[BimmerWill]

Okay pulled the a pillar trim off the passenger side and looked to see if the leak was coming from a disconnected hose as had heard from multiple places that this is common. No luck however so I'm back to square one. I'm going to try and look up how to check the windshield and sunroof drains and see if that's it. If not then I'm at a complete loss as to the source. This is really bugging me that's for sure.

[NorCalZman]

Did you check the door vapor barriers?


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[BimmerWill]

Not yet. Was hoping to avoid taking them off if I could help.

[NorCalZman]

Taking off the door cards to check them are not hard. If I can do it anyone can. Just some screws and pull it off the clips and watch for the electrical/airbag connections


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[ELCID86]

I need to do that to Colin's car when he's home. I noticed a bit of a musty smell when I was driving his car in SC the other week. Passenger's floor felt a bit damp. I need to adjust the window regulator on that side anyway.


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[BimmerWill]

I just don't understand how if the car has been stationary when it rained how would water get in through the door if the car wasn't moved.

[E_Rak]

Sometimes the gunk that seals the vapor barrier just comes loose over time and lets water get to the inside of the door.

[ELCID86]

Sometimes the gunk that seals the vapor barrier just comes loose over time and lets water get to the inside of the door.

It still amazes me that it would then drain into the car and not out of the bottom of the door!


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[BimmerWill]

It still amazes me that it would then drain into the car and not out of the bottom of the door!


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I completely agree!

[E_Rak]

It's a fundamental issue with the way the vapor barriers are used. They attach to the inside part of the door, so if the bottom of the barrier detaches, water can flow down the material of barrier itself and have a clear path right to the inner part of your door behind the door card rather than to the drains in the bottom of the door and the door sill.

This is not limited to our cars; if the barrier was attached to the other side of the door cutout so as to prevent leakage even if it detaches, it would be next to impossible to remove and replace it to get at the window motor and regulators.