Water in back o/s passenger footwell. Cannot find any leaks anywhere. Any suggestions to help please. On vw Passat 2004.

air con evaporator drain pipe blocked or missing. condensation forms on evaporator and and must be ablr to drain out under vehicle. if drain blocked water will build up and leak into foot well. if missing water will drain directly into foot well.

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.

Hi

Common fault with VW's firstly check the door seal at the bottom and make sure it is not wet inside.

Next place is under the bonnet, just under the windscreen below the wipers you will see a long tray the "skuttle panel" leafs and muck build up in here where the drain plugs are once they get blocked the water starts coming in the car from behind the dash board. You should be able to see the problem visibly and it should be easy to clean.

I had this on a golf about 2mths ago, and a polo a while ago and also on a few passats.

Regards

Dan

Hi, passats of your cars year suffer from water leaking into the car from the heater inlet ducting mounted forward of the windscreen on the N/S. This contaminates a number of multiplug wiring connections mounted inside the car to the left of the passenger side footwell (behind the plastic kickpanel). Remove the panel and inspect each of the multiplugs by pulling them apart. Any connections affected buy water ingress and corrosion should be cleaned with contact cleaner and treated with water repellant spray (WD40 etc). To affect a permanent repair the heater ducting/inlet box will need to be removed and sealed - probably a garage job.
Hope that helps Matt...

the water can travel along surfaces or beams in the car so you cannot tell where it is actually leaking. in my ford windstar water leaked in right over the fuse box. it ran along a cross beam from the passenger side. if it has those plastic strips they use to go in between small gaps in the metal... like along the roof where the roof is and the metal of the sides joins it is likely they are leaking. best to take a garden hose and have someone inside the car with a flashlight on the floor looking for leaks

sounds like your window regulator is going out

the water in the footwell can make the wiring rotten check under the tape for any corrosion,i have changed a couple of units that have blown due to the water but it is a common fault

check the fuse 3rd along 3rd down.its a 10amp minifuse.if thats ok chances are you have a water leak in to passenger footwell that has corroded the splice that feeds the convenience control unit .if fuse is ok let me know and i can give you more info.

check the passenger footwell for signs of water entry.the convenience control unit is located in there and can get full of water and cause current draw.also have you got a non gen radio fitted.it is common for them not to be wired up correctlly.worth a look

if its got a sun roof check the drain pipe from that it may have come off