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.Google+
Car Problem Reports
Audi Allroad Quattro Rainwater May Accumulate in Plenum Tray Due to Clogged Drains
Audi Allroad Quattro Problem
Average Mileage: 103,010 mi (50,000 mi - 169,000 mi)
Visitor, 2003 Audi Allroad Quattro, 95,000 mi
rainwater leaks into interior, passenger side
Visitor, 2004 Audi Allroad Quattro, 70,000 mi
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.
Visitor, 2004 Audi Allroad Quattro, 103,000 mi
soaked wiring underneath floorboards causing havoc to the electrical system.
Visitor, 2001 Audi Allroad Quattro, 115,000 mi
water accumulation, mostly on right side. had to install small drain holes.
I tried removing the battery to find the clogged drain under, but dammit, could not get the battery out, either I replaced with a battery too big, or the Germans are unconcerned about guys like me wanting to move a battery. Oil change guys unclogged from below. Water comes inside through the cabin fresh air filter, so I replaced that ($35) as I assume it becomes moldy after sitting in a pool of water. Thought about sealing that opening with plastic and a tight band, but decided water would circumvent my jury rig. I try to keep the crap off the windshield now, but still wish I could get to the drain.
Visitor, 2003 Audi Allroad Quattro, 148,204 mi
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
Visitor, 2004 Audi Allroad Quattro, 50,000 mi
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.
Visitor, 2003 Audi Allroad Quattro, 169,000 mi
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