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.
Various Probelms Caused by Clogged Plenum Tray Drain on Volkswagen Passat
Average mileage: 104,522 (35,000–190,888)
32 people reported this problem
14 people shared problem details
Everyone wanted me to repair the heating system because of a wet carpet. These forums really help. It was clogged leaves. This car is killing me! Someone buy it off me!
2003 Volkswagen Passat103,650Visitor
Water enetering the interior- water on the floor, during the winter I have to scrape the interior as well as the exterior of ice/frost-- My dealer checked it out, $300.00 an found drains OK but indiated further diagnostic's would still be on my dime. A 2003 model and VW has lost the SIMPLE knowledge of how to keep the interior of the vehice dry when it rains! I have heard this is quite a common problem in numerous VW products during thew early 2000's I guess its cheaper for them to ignore the problem rather than a recall, there's always anther sucker down the road. A so called class action suite tuned out to be awaste of time when up against a big corp. such as VW A VW no more for me, or my friends
2004 Volkswagen Passat90,000Visitor
Large amounts of water on drivers side floor. Cleaned out drain in driver door hinge, no longer seems to be a problem.
2002 Volkswagen Passat120,000Visitor
Same problem, only my mechanic didnt find it and water got into engine - completely ruined engine. 3800$ repair bill minimum.
2004 Volkswagen Passat110,300Visitor
Just bought a 2004 VW Passat Wagon, to my dismay I found the inside soaked after rain. The car started having problems when I shift. I got it to shift one more time to park position then it wouldn't shift at all. The mechanic scanned it, the code said transmission computer, he pulled it up the whole box that "protects" the TCM was full of water the tcm was full of water. I just sat there & cried this is ridiculous!! I bought this vehicle cause my Chevy Blazer was totaled in a collection, I really miss my Blazer I had none of these problems! Now I don't even know how or where the water came from & I don't have a lot if money to fix it. Any suggestions would be appreciated. Heartbroken in Brooklyn.
I bought my Passat Wagon used from Hilltop Motors in July 2010. I noticed occasional water on the passenger side but didn't know where it was coming from, it was intermittent and didn't seem serious. Since there were so many ongoing issues with the car I didn't get this addressed. Recently it became much worse and before I got it into the shop it flooded during heavy rains on the passenger side doing damage to my electrical or computer system. My car has been in the shop all week while they try to dry it out and see if they can repair it. Its not looking good.
1999 Volkswagen Passat35,000Visitor
I clean the plenum tray and surrounding area monthly with my leaf blower.
2001 Volkswagen Passat55,000Visitor
water leaked into the passenger part of the front seat. this was due to the gaskets around the smog filter behind the glove box. I complained to the factory and they fixed it under warranty even though the warranty had expired. There is a trnasmission control module under the passenger seat. The water seeped into it causing the car to lock into second gear. estimated cost of repair was 1000 dollars. The factory fixed it it for which I was thankful.
1999 Volkswagen Passat118,000Visitor
Had water pool in the driver side corner and leak into the floor, shorted out the starter relay and ignition.
2001 Volkswagen Passat81,000Visitor
dash lights up immoblie activatived
2001 Volkswagen Passat190,888Visitor
front nearside brake unit overheating, had new pads, disc, pipes and callipers, water under carpet on passenger side, is a.b.s. unit damaged ? had plenum tray cleared by A.A. 2 years ago, was told water got into electrics after emergency stop, when brakes all locked on.still not sorted.
1998 Volkswagen PassatVisitor
My car was serviced and the protective shield was removed and never replaced. The car has had electrical problems ever since then. I live in the pacific nw with rain being an issue for the unprotected car
Sudden lost of brakes. The service tech stated the cause was a power boost failure in the braking system. No debris visible,
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