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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Leaking vapor barriers, fixed!

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      08-31-2014, 08:34 PM   #1
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Leaking vapor barriers, fixed!

Recently I bought an E90 328xi as a restoration project that I could use a daily driver/winter car ..as the E92 M3 is amazing but the fuel economy is not friendly to my wallet nor does it enjoy a Chicago winter. The car had been sitting for a long time and had clogged sunroof drains, cracked grommets in the firewall, and bad vapor barriers in the front doors.

Using some thick plastic and a roll of 3M window ribbon seal, I made my own vapor barriers to replace the foam ones which were no longer sealing and falling apart.

Water used to drip down from behind the door panel, onto the door sills and down into the carpet. Now its fixed!

Thought I'd share

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      Yesterday, 02:41 AM   #2
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Just curious why you didn't go with a replacement, aren't those barriers cheap?

Also interested in your cracked firewall grommet pics.
Gotta pay to play.
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      Today, 10:51 AM   #3
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What about noise in the cabin ? This plastic material seems bound to flap in the door, and provide a lot less sonic insulation than the foam that was there.
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