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  1. A4 Driver footwell water leak 
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    Hi there.

    Recently I have been experiencing an awefull smell in my Audi. At first I had no idea where it was coming from and it would sometimes come and go. One day by chance I was driving bare foot and noticed that my footwell is completely wet. I searched the internet for simular problems but found nothing that exactly described my problem.

    I took the car to an audi dealer and told him about the problem. The entire service of the car cost like 10% of its complete value and I was told that audi informed them about the problem and it is fixed now. Alas, it was not fixed.

    I read up again and found all kinds of explenations ranging from battery tub drain pipes being clogged and letting water spill into the ventilation system of the car etc etc. I then proceded to simulate the problem. This is what I found out.

    If I poured water down the driver side front windscreen the leak would occur. The pictures describe the leak best...







    Anyone have any ideas how I can fix this?

    Thanks

    W
     
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  2. Re: A4 Driver footwell water leak 
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    if audi said they fixed it go back to them and get some wellys
     
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  3. Re: A4 Driver footwell water leak 
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    I suspect it probably doesnt matter where you pouring the water in, it's all about how it's getting to where it's coming out. My A4 Avant used to get wet footwells occasionally. On investigating it I found that the water collected underneath the battery area by the front bulkhead and it was from there it would find a way into the footwells. The commonly blocked drain hole is actually under the brake servo but if you cant get to it there then remove the battery. If you discover a puddle of water under the battery then this is the answer and it needs unblocking. Hope that helps. Mark.
     
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  4. Re: A4 Driver footwell water leak 
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    Quote Originally Posted by mrobson View Post
    I suspect it probably doesnt matter where you pouring the water in, it's all about how it's getting to where it's coming out. My A4 Avant used to get wet footwells occasionally. On investigating it I found that the water collected underneath the battery area by the front bulkhead and it was from there it would find a way into the footwells. The commonly blocked drain hole is actually under the brake servo but if you cant get to it there then remove the battery. If you discover a puddle of water under the battery then this is the answer and it needs unblocking. Hope that helps. Mark.
    Thanks for the reply.

    The problem is that I know about the battery problem and I spesifically poured the water so that it does not go anywhere near the battery. Unless it somehow finds a way to run from the one side of the car to the other side, because that is where the battery is at.

    The other problem I am having is that it is so difficult so see anything as there are so many panels and stuff covering the leak. I have no idea how one would get to the problem, even if it was know what it was. It looks to me like I would have to dismantle the entire front end of the car to find the leak. This is highly annoying. I can barely afford the car as it is...
     
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  5. Re: A4 Driver footwell water leak 
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    take the plastic cover off you will get a better view as mrobson said it doesnt realy matter where you pour the water it will fint a way in but i would defo remove batt to see if you have a build up of water or stick your hand down side off batt i could feel it when i checked mine
     
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  6. Re: A4 Driver footwell water leak 
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    What car is it? mine had the blocked drainage problem and it actually got doen for free at Audi as there is a recall on the problem. I first noticed water dripping out of where yours is (not inside but outside near the front wheels, the plenum chamber i think it is)
    AUDI A4 1.8T QUATTRO SPORTS : 2001 B6
     
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  7. Re: A4 Driver footwell water leak 
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    The black cover that goes across the back of the engine bay which includes the removable battery panel, conceals everything you need to look at to see if you've a blocked drainhole under the brake servo. It actually comes off quite easily in one piece. It's clipped into place so just use something to pull or push the clips up and off, pliers, screwdriver etc. Taking the battery out is a pain so if you do find a pool of water is present then see if you can get your hand or something pokey and flexible under the servo and poke about to unblock the hole. It can easily get blocked up with leaves and muck and the water sloshes around the whole area when being driven. You'll know when it's unblocked because all the retained water will gush out underneath the car and the puddle disappears. Mark.
     
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  8. Re: A4 Driver footwell water leak 
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    Quote Originally Posted by mrobson View Post
    The black cover that goes across the back of the engine bay which includes the removable battery panel, conceals everything you need to look at to see if you've a blocked drainhole under the brake servo. It actually comes off quite easily in one piece. It's clipped into place so just use something to pull or push the clips up and off, pliers, screwdriver etc. Taking the battery out is a pain so if you do find a pool of water is present then see if you can get your hand or something pokey and flexible under the servo and poke about to unblock the hole. It can easily get blocked up with leaves and muck and the water sloshes around the whole area when being driven. You'll know when it's unblocked because all the retained water will gush out underneath the car and the puddle disappears. Mark.

    Thanks!!!

    I will try this and report back.

    Regards.
     
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  9. Re: A4 Driver footwell water leak 
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    Hi - I am not sure if you resolved this but I thought it maybe useful to someone if I added my experience.

    The nearside bottom of the windscreen was found to have a leak, calling for a repair by Autoglass. Footwell still wet so I took out the battery and clreared out the drain hole. No leak for a couple of weeks until it rained.

    There was a strong smell of windscreen washer in the car and it used loads so I traced the washer pipes and the junction located under the passenger's bulkhead was leaking - replaced junction. All was well then the rear windscreen washer packed up. The newly found pressure in the sytem blew off the rear junction which is located and reachable from the offside first aid/jack compartment.

    All very exaperating but now all is well.
     
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  10. Re: A4 Driver footwell water leak 
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    Check the cover to the ECU.

    I had water in my footwell which I put down to me. Later on I started to get all sorts of error messages with the ABS and ESP. After switching off and restarting, all was well.

    One rainy day the car went into limp mode. I also noticed that cooling fan was on and that the ECU was not powering up. After having the car recovered to Audi, they said the ECU would need replacement.

    I wasn't convinced so pulled parts off the car in their workshop to find that there was a chunk missing at the very back of the ECU cover. This was allowing water to fill up the ECU housing and also to run into the footwell through a cable entry point. Water was also dripping all over the connectors for the braking system.

    A repair was carried out with a tube of silicone sealant. Not very pretty, but it's not readily visible!

    No more leaks and no more electrical faults - after 8 months.

    Hope this helps
     
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