Question about 1999 Volkswagen Passat

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Water continously leaks from the horse that house the sensor of my Volkswagen VR5 Passat model 1999

Water leakage from the sensor area

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I had same prob but it wasnt hose it was themostat housing. i just change thermostat housing assembly on my 96 passat. It was cracked where i couldnt see till i got it off. cost about 70 bucks at vw dealer(new bolts, seals and housing.). Not a hard job if last owner didnt strip allen heads, grrrrrrr!!!!! I put new back in about 45 min. hope it helps. drove me crazy!!!!!

Posted on May 28, 2009

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2001 Volkswagen passat 1.8l turbo the o ring on sensor was broke so water kept leaking out got that fixed but now the car will not keep no water in the coolant resovoir tank

Is your car overheating ? Might not be related at all. Run your Passat until it reaches operating temperature and check to see if the fans behind your radiator turn on. The temperature sensor might be bad, when you replaced the O ring, did you also replace the sensor ?

Oct 18, 2015 | Volkswagen Cars & Trucks

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My 2004 Passat has a water leak behind the engine. Does the upper radiator hose go over the engine and then down behind the engine.? I can't see back there. Does anyone know what it could be?

In back of the head theres is a plastic housing which holds the coolant temperature sensor and a few hoses. this platic housing is know for leaking. hope this helps good luck.

Sep 29, 2012 | 2004 Volkswagen Passat 1.8

1 Answer

I drive a vw passat 1.6l 1999 model. How can i remove the air lock in the water system? please help.

There is a bleeder valve usually located near the thermostat housing or somewhere on top of the engine. open valve until you get a flow of water. I advise not to do this when the car is at running temp or higher do this with engine cool.

Nov 18, 2010 | 1999 Volkswagen Passat

1 Answer

2004 passat alarm keeps going off where is the fuse to turn it off.

This could be serious, you need to lift up the carpet in the passenger footwell or drivers which ever continent you are on, and check for water leakage, water tends to break through the seals on the pollen filter housing and come down the a pillar over all your wiring and into the footwell, the seat willneed to be removed and check the the convenience controll unit has not been soaked, if you are lucky it might have survived and you willonly need a wiring repair and a dry out, toprevent this happening again you must either ask a dealer to do it or purchase the sealing putty from a dealer and place it around the pollen filter housing. VW are well aware of this problem and they willknow exactly what you are talking about. Hope this helps.

Apr 04, 2010 | 2003 Volkswagen Passat

4 Answers

Hi, rear footwell is filling up with water behind drivers seat. seems to be happening after heavy rain. Not sure if door seal problem or bung thing being clogged up under battery as some sites seem to...

It's probably coming from the sunroof drains being clogged.

Open the front door, look closely, you will see a rubber tube sticking out 1 inch. Cut off the tips so the tube is wide open.

Nov 16, 2009 | 2003 Volkswagen Passat

4 Answers

Water keeps filling up under passenger seat in rear of car

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.

Aug 26, 2009 | 1999 Volkswagen Passat

1 Answer

Coolant leak

check them plastic housings for distortion ,or just change them ,they are only cheap anyway and very prone to leaks when hot and under load

Jun 20, 2009 | 1999 Volkswagen Passat

1 Answer

2003 passat sedan. water on floor and in heater fan

I don't think it has anything to do with the sunroof. I think you have a leak either around the windshield or under the cowl where the wipers are attached. If it's in the cowl area probably over the blower motor housing on the right and the water is following the vent system to the drivers side. Please let me know how you made out.

Thank you

Jun 04, 2009 | 2001 Volkswagen Passat

1 Answer

2001 VW Passat leakin water

I would highly suggest a pressure test to really pin point this leak. I can tell from diagram that the coolant expansion tank line goes right thru that area. I would also caution you to the obvious with this vehicle- everything is a tight fit and coolant leaking from the t-stat housing and or water pump could look similiar. I strongly suggest a pressure test to keep from throwing good money away.

Nov 04, 2008 | 2001 Volkswagen Passat

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