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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F34 3-Series GT (Gran Turismo) Forum > Part# Vapor Barrier
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      11-20-2021, 09:00 AM   #1
BNTLY
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Part# Vapor Barrier

Anyone replace their vapor barriers (SOUND INSULATING DOOR)? Iím looking for the part# for the rear right. I appreciate any input plz and thanks.
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      11-20-2021, 10:57 AM   #2
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https://www.realoem.com/bmw/enUS/sho...53#51487343922

Don't replace it, cover it with this:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I've lined all my doors and trim with this vinyl mastic, including the underside of my parcel shelves.
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      11-20-2021, 12:03 PM   #3
BNTLY
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Quote:
Originally Posted by Billfitz View Post
https://www.realoem.com/bmw/enUS/sho...53#51487343922

Don't replace it, cover it with this:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I've lined all my doors and trim with this vinyl mastic, including the underside of my parcel shelves.
Nice, you provided both ó much appreciated.
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      01-10-2022, 07:51 PM   #4
BNTLY
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Took the door panel off, inspected the vapor barrier and it was still sealed really well. Dynomatted the vapor barrier and went for a car wash. Still leaking ahhh!
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      01-10-2022, 10:44 PM   #5
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Leaking where? Doors aren't watertight. Water will make its way past the window gaskets, it drains out of weep holes at the bottom of the doors. That's why the sills get wet.
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      01-11-2022, 01:12 PM   #6
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Quote:
Originally Posted by Billfitz View Post
https://www.realoem.com/bmw/enUS/sho...53#51487343922

Don't replace it, cover it with this:

https://www.amazon.com/gp/product/B0...UTF8&psc=1

I've lined all my doors and trim with this vinyl mastic, including the underside of my parcel shelves.
The underside of the parcel shelf ? No problems getting it to stick to it ?
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      01-11-2022, 01:49 PM   #7
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I first coated the underside of the parcel shelves with spray on adhesive to give the adhesive on the mastic something to bond to. It works a treat.
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      01-11-2022, 11:37 PM   #8
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Quote:
Originally Posted by Billfitz View Post
Leaking where? Doors aren't watertight. Water will make its way past the window gaskets, it drains out of weep holes at the bottom of the doors. That's why the sills get wet.
Leaking from under the RR door either gasket or drain holes into the RR floor. Cleaned out the drain holes before sealing too.
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      01-12-2022, 08:22 AM   #9
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The only way to be sure if that's related to the door is to pull the door card and then put enough water on the car for the leak to show up. I've seen reports of water on the floor coming from multiple sources, most of them not the door. Don't discount the moon roof seals.
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