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Water From Clogged Sun Roof Drains May Damage Control Modules on Audi A6 Quattro

Problem Description and Possible Solution

Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.

Problem Data
RepairPal Verified
Average mileage: 103,031 (60,000–134,000)
11 model years affected: 1995, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2005, 2006, 2007
19 people reported this problem
Viewing 1 - 6 of 6 comments
2000 Audi A6 Quattro - After a heavy rain storm, I found about 1/2 inch of water in the rear passenger side foot well. After researching the issue and reading numerous reports of the same problem....it makes me wonder why Audi has not addressed this design flaw. This is my first Audi and its probably my last.
The drain under the hood was clogged with leaves. Reached into the pit of water, removed leaves, water drained. NOw to fix the water damage inside the car - mechanic removed entire interior and dried the carpet in heated garage for 10 days. The whole carpet has a 2 inch foam underside that acts like a sponge. Must be removed and dried or you will get never ending mildew and mold. He also removed the computers and detailed those with metal cleaner. Eventually made it run at 100%, without replacing anything. You need to get the water out before it damages the computers under the carpet!!!!!!!!!
Flooded passenger side. Dead MMI... not fixed yet...
The car doesn't run correctly like it should.the transmission don't shift like it supposed to do.and the only way to fix it is to replace the damaged ecu and tcm.then it would be fixed to where the car will run like it should.
Took my audi A4 conv. in for a check engine light and found that it is collecting water under the carpet. Ijust put a new roof on it and had the leather seats repaired. Now they have to lift out the carpeting and dry the computers before they even address the engine light which they think may be a CV joint problem. I am totally disgusted with my summer "fun" car --- a money pit!
Entire Floor is flooding when it rains