Various Probelms Caused by Clogged Plenum Tray Drain on Audi Allroad Quattro

Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.

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Average mileage: 105,464 (50,000–169,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
17 people reported this problem
9 people shared problem details
I became aware of the problem when I heard water sloshing around in the right rear floor area. Next, brake warning lights, then trouble shifting. Audi dealer estimated damage to "control modules" over 8,000.00 Insurance evaluated as total loss due to design flaw. Not the first design flaw in this car.
rainwater leaks into interior, passenger side
water accumulation, mostly on right side. had to install small drain holes.
First my abs, ESP and suspension light came on. Then my check engine. Soon after that I noticed the tranny slipping and shifting hard. Then the almighty brake light came on and kept flashing. I researched it and I did see notes about water getting in, burning didn't think that was the case. Until later that afternoon when I stopped suddenly and I heard the sloshing. I had about 3 inches of rain water. It was the drain over by the battery. Filled with leaves and various debris. We unclogged it drained the water. But low and behold the car filled back up on the passenger side. As we speak I am stuck in a parking lot as my tranny will only allow me to go about 40 mph
soaked wiring underneath floorboards causing havoc to the electrical system.
The interior of my car filled with several feet of water during heavy rains. I found out that water accumulated in the plenum tray due to clogged drains from leaf debris that had accumulated. It took a month and $6k for the dealer to repair. They refused to cover it with warranty. Audi later lost a class action lawsuit due to the matter. I am done with Audi.
anyone found the drain holes? can I get to them if I jack the car up, or drive up on ramps?
I discovered water in my cabin area (left hand side) front and rear after there had been a large hail storm. There was approx 20cm of water sloshing around and I could not work out how ir had got there as all the windows and sunroof were shut. After some web searched I found that this was due to the drain blocked due hail which caused the heavy rain to flood into the cabin area.
frequent leaking and consequential moldy carpets and padding throughout passenger side of car
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