Question about 1999 Volkswagen Passat

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I have water getting into the rear passenger well tried clearing under battery housing but it still seems to get in

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  • agc0ckram Mar 10, 2009

    i will have a look at that and see what comes about



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Probably it comes from your sealing-wax, where are two small pipes that go down and you have to clean them with any long petty thing. I had the same problem and i solved it like that.

Posted on Mar 09, 2009


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2001 Yukon XL carpet in rear section on passenger side is continually wet, despite dry weather. I suspect is is somehow getting A/C condensation? Any suggestions?

{: ) You should check and clean first the rear a/c drain hose. It may be clogged with accumulated dust. You can use a narrow non-metallic tool to clean through the hose. If the drain hose is all clear, check again operation and observe if water had drained through the hose. Otherwise the water may be draining elsewhere on the housing. There could be leak on the housing although rarely happens, and especially if the rear a/c housing has been serviced recently. If this is the case, you will have to remove the rear quartertrim panel to get a closer look on the rear HVAC housing.

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all sunroofs have drain pipes, usualy 4, one on each corner, they usualy run down the A pillars at the front and poke out near the kick panals by the footwell. the rears often run down the C pillar to the vicinity of the boot.
open the sunroof up and carefully pour lots of water around the drain gulley of the sunroof, you should see it pissing out onto the floor at the front and rear on each side. make sure water goes down all 4 corners of the sunroof and check. Pipes can come of at the roof. also the drain grommets block up.

common problem on passats also is the pollen filter housing letting in water (under the scuttle panel beneath the bonnet. on left hand drives though, this fills the passenger side only (left). not sure on RHD which side pollen filter housing is on , but when they leak the water fills up inside the car on one side only, which can flow front or rear depending on car being parked up or down hill.
the seal between the pollen filter housing and the bulkhead often leak, if you press down on the plastic housing you may hear the seal squelching water. there was a recall on this, so it may have been done.
If the comparment under the panel (where the battery is) is filling with water, there is a drain grommet under the batter that also blocks up sometimes, causing it to fill up and flow in where it shouldnt.

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The evaporator box drain is stopped up.Under hood,under the firewall,right below the ac lines,you will find the drain.Take a small wire,like balin wire and move it in and out of the drain hole to relieve the water,it will pour out pretty good.If this doesn`t work,try compressed air pressure.I hope this helps.

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My 2001 passat did the same thing. my leak was coming from the door panel. Open your door and use a water hose to simulate rain water running against your window. Water should run into door and drain out of several drain holes at the very bottom of your door. Check for water leaking from the bottom of your plastic door panel. The water runs down into the door and leaks through your inner door panel seal causing water to leak inside from the bottom of your door panel and run into the floorboard instead of draining out the water hole in the bottom of your door.

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Have you cleaned out the drain tubes? There is a 'rain rail' underneath the rear lip, which diverts water off the top and down to tubes on each side. The tubes get clogged up with leaves and whatnot. You can use a coathanger to CAREFULLY clear the debris. Check out for more Miata information than you could imagine.

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