1994 BMW Carpet Leak in Rain

BMW
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WINBLUE
  • MEMBER
  • 2 POSTS
My 94 BMW with a sunroof been leaking under seats/carpet for a few years especially during heavy downpour & from melting snow. 2 Mechanics have spent many hours & a lot of money trying to find the source, even changed seals around sunroof & windows. Very reliable & low mileage, intends to keep for life, please help me locate the leak/s especially when all the electrical wires are where the water sits.
Jan 26, 2006 at 6:41 AM
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PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
No actual experience with your car or sunroof. The sunroof on my auto has drain tubing that can become clogged or pinched. Hopefully it is that simple and was just overlooked.
Good luck. Let us know what you find.
Feb 16, 2006 at 12:30 AM
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LOVESCARS
  • ✓Experienced Mechanic
  • 359 POSTS
with all the checking you've done around the sunroof maybe that's not the source of your leak. suggest you find some tape that can be easily removed and has excellent adhereing properties.
Tape around the sunroof only when you know it's going to rain heavily if the water still comes through you know it's not the sunroff and can move on to another source like possibly the doors or back glass.
Feb 16, 2006 at 12:43 PM
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WINBLUE
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Thanks so much for helping out. Will look for tapes to locate the leak. A mechanic did unclog tubes around sunroof with a coat-hanger etc. All interior carpets were pulled off by another while they shower the car with water over a 4 hours period (very expensive way to give the car a shower!). Will report back soon.
Feb 17, 2006 at 12:26 AM
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Suggested Repair

Verify the sunroof drain tubes are not clogged or pinched. Tape off the sunroof before a heavy rain; if water still enters, the sunroof is not the source and the doors or rear glass should be checked next.

Conversation Summary

A 1994 BMW owner reported years of water leaking under the seats and carpet during heavy rain and melting snow, despite seal replacements and costly inspections, and was concerned about wiring in the wet area. One expert suggested clogged or pinched sunroof drain tubes. Another suggested taping off the sunroof during heavy rain to rule it out, then checking the doors or rear glass. The owner said the drains had already been cleared and a long water test had been done, and planned to try the tape test.

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