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.Google+
Car Problem Reports
Volkswagen Passat Water From Clogged Sun Roof Drains May Damage Control Modules
Volkswagen Passat Problem
Average Mileage: 104,327 mi (21,000 mi - 209,600 mi)
Visitor, 1999 Volkswagen Passat, 40,000 mi
Leaked to the passenger side module and car ran like crap. I got that fixed, sort of. The transmission still shifts rough. The driver's side module got wet about 6 mos. later and I lost interior lights, central locking sys., etc. which I have not fixed because to cost is prohibitive. The car is only worth 4k. I can not believe this car was designed by German engineers. My dog could have done better....
Visitor, 1999 Volkswagen Passat, 100,000 mi
My module malfunctions. Drain under car battery clogged and flooded module located on the driver's side floor. One by one things have stopped working...windows, power sunroof, gas door latch, remote start, heated/power mirrors, vw key malfunctions etc. I think VW should recall and fix the problem. POOR DESIGN...WHAT WERE THEY THINKING !!!!! I found where I can get a new one online...cost about $300.00.
also had the inside of my passat flooded...found drivers side rear drain hose for sunroof kinked between some metal section in the fender opened that but still getting small amounts of water when it rains real hard.... replaced trans. control module under drivers side carpetand got the car to start and run but still need to find the comfort module and replace it so i can get my windows to work....if anyone can help me with that...i would appreciate any info anyone can give me...
Visitor, 2002 Volkswagen Passat
Had this occur 5 yrs back. Entire computer ($5K repair bill)system "flooded". Shocked to learn as have car regularly cleaned; luckily covered under insurance policy. Furious that VW tried to blame me. Filed complaint on-line with NHTSA.
Visitor, 2005 Volkswagen Passat, 125,000 mi
TCI transmission controll module destroyed by massive water leaks, Water leaking in the passenger side soaking the contents of the glove box collecting in the rear floor pan. It will be the sunroof drains clogged or a drain under the battery or both. The tci is $1400 farfagnugen you !!!!
Visitor, 2006 Volkswagen Passat, 89,000 mi
Water under carpet drivers side.
Visitor, 2000 Volkswagen Passat, 119,000 mi
The car will not start -after heavy rain - clogged drains in sunroof cause leakage to inside of car to control module,
Visitor, 2000 Volkswagen Passat, 165,000 mi
haven't fixed it yet. at a loss to know what to do. car is dead in the water, so to speak. car was flooded front and rear seats, body control module is shorted. vacummed the water out and shoved the car in the garage. I don't have $$$ to fix. Shouldn't VW recall these cars and fix these drains and components?
Visitor, 2006 Volkswagen Passat, 90,000 mi
the interior of the car STINKS!!! We have ripped up the carpet and found mold. Cleaned the interior again and again but it still stinks. I think this must be the problem!!
Visitor, 2000 Volkswagen Passat, 100,000 mi
my 2000 passat also has leak problem from the sun roof, and now my instrument cluster and my brake lights do not work.