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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-21-2012, 11:34 AM
jclanin jclanin is offline
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Mein Auto: 2003 540i 6 Speed
Water in drivers side floorboard - 2nd row

Hi all,

We've had a ton of rain in Atlanta the past 24 hours. My car has been parked outside and now has very saturated rear floorboard (drivers side). I assume I have a clogged rain gutter -- or something of the sort. Any ideas?

thanks!

JC
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  #2  
Old 01-21-2012, 11:51 AM
pleiades pleiades is offline
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One possible cause is a loose/broken seal (butyl sealant) holding the insulative foam vapor barrier that's under/behind the interior panel of your rear passenger door. If it's that, it's very easy to fix. You'll need some butyl cord/tape or similar butyl based sealant to reattach the foam barrier. Check around here for threads on vapor barrier or vapor seal repair and how to pop off the interior door panel (one philips screw, 10 or so plastic clips).
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Old 01-21-2012, 12:11 PM
bobdmac bobdmac is offline
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Although I've been fortunate not to have experienced this problem myself, I've read enough posts on this board to recognize it as a classic sign of failure of the vapor barrier seal, as Pleiades described above. There are numerous DIY links, with photos, in the "very best links" thread at the top of the main page of this E39 board.
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Old 12-15-2012, 09:09 AM
Rwelkins Rwelkins is offline
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I had the same problem, and agree that you should reseal the vapor barriers on the rear doors. I highly recommend doing both sides......the other one will fail too.
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  #5  
Old 12-15-2012, 11:23 AM
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Dking078 Dking078 is offline
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Like others have said, chances are it's the vapor barrier. It's an easy fix if you're handy. If it then still leaks, you may have a broken or detached hose on the sun roof drain...which is a pain to fix.
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Old 12-15-2012, 11:25 AM
Tommylaw9 Tommylaw9 is offline
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I just did the vapor barrier this week. holler at me and i can give you a little better insight that a guide might be able to. (while its still fresh in my head)
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Old 12-15-2012, 12:11 PM
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bluebee bluebee is offline
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Type /vapor barrier F3 in the bestlinks and this comes up, among others:
- Vapor barriers: Sealant for door panel vapor barriers (1) & sizes for the adhesive (1)
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See also: E39 Bestlinks & How to easily find what you need
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