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X3 E83 (2004 - 2010)
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Old 09-18-2016, 10:33 AM
Sanders Sanders is offline
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Location: Atlanta, GA
Join Date: Aug 2016
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Mein Auto: 2006 BMW X3 3.0i
Quick vapor barrier question (PIC)

I'm installing some new speakers in my X3 right now. Long story short, the door panel fell off while I was undoing the clips, and the airbag/window switch wiring harnesses ripped the vapor barrier in two places.

Will I experience water leaks in the cabin from these tears? I did a little research and it seems like water only enters the cabin if the seal around the edges of the barrier are torn, not if there is a tear in the center of the barrier. This makes sense since there were already holes in the center of the barrier for cables to pass through.
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Last edited by Sanders; 09-18-2016 at 12:08 PM.
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Old 09-18-2016, 01:52 PM
swampX3 swampX3 is offline
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Location: New Orleans
Join Date: May 2013
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Mein Auto: bmw++many
it may leak

depends on your luck ....it is very very possible for tears to leak and not just the outer perimeter.....you can also leak thru poor or non existent clips that push in the door and seal the holes .....on many older models the plastic holders just come loose from the door card and fall off from where they were glued

just seal you tears etc with a good flexible exterior caulk from H depot or some place
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Old 09-18-2016, 05:12 PM
joylove joylove is offline
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Mein Auto: 08 e83 LCI
It will be fine. You can see holes in the barrier already to allow wires and fixing to pass through. If you have duct tape you can use a piece to prevent the rip spreading.
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