I could write a book about the rear door leaks in my GSW
Here's the short take:
- Leaks from speakers, access panel and door panel clips. The gaskets on the speakers were intact.
- The VW part number is wrong for the rear door speakers for Mk7.5 GSW S (6-speaker non-premium stereo)
- Hopefully zip ties, plastic caps and hot glue will save me from opening up the doors for a 4th time
And the details:
The rear door speaker is PN 16D035710 (full range 7Ω)
not 5G0035453J (4Ω woofer, works in front door only) as listed in the parts catalog. They are the same size, but pinned differently and with different impedances. Fortunately the correct part was $12/each at the dealer. I didn't want to glue those cheap housings back together when the replacements were so cheap. I used 4mm rivnuts (thanks
@MrE812) instead of rivets, which almost certainly contributed to the problem in the first place.
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I had leaks from multiple places in addition to the speakers. Unlike some other posters, the gaskets on the speakers were fine. I still can't quite get over how badly engineered this is for a company that has such high standards in general.
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Both doors had evidence of leaks in the door panel clip hole just above the speaker. The plastic access panel is loose and was a leak source on the left side. I used foil tape to hold it firmly downward. Hopefully that's adequate.
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I took a guess and added a zip tie over the boot for the door check to act as a drip leg. This seemed to work on the left side, which was dry after the last ~1" rain, but not on the right, where I think I routed
more water toward the door panel clip hole below the speaker. (Since adjusted.)
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I added a cap from a bike chain lube dropper bottle behind the door panel clip hole with hot glue. If the problem recurs I might repeat with all of the holes on the lower part of the doors.
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