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1999 Audi A4, european car. When air conditioning has been on for a while and you turn off the engine, water comes into the footwell on the passenger side of the car. There is never water under the car when you turn off the engine. Is there a drain-off blocked?

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Yes there is. The drain should come down from the heater core area (behind the glovebox) and down under the car. Yours is either clogged, or for some reason has been pulled off the core, so that water just flows from the heater core drain nipple directly into the car.

Posted on Aug 12, 2008

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Every time it rains water comes into the passenger side footwell.My Audi is a 2.6 convertible 1998 model. any ideas how to solve this problem ?


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Hi I HOPE SOMEONE CAN HELP I HAVE AN AUDI A4 1.9TDI AVANT ON A 2000 X PLATE IN THE PASSENGER FOOTWELL UNDER THE DASH IT IS DRIPPING WATER INTO THE FOOTWELL ANY IDEAS? REGArds..


If your car has a sunroof, one if the sunroof drains runs down through windshield post down through to bottom of the car. If it gets plugged it will back up into car. If it's coolant you're finding (sticky and smelling like coolant) your heater core is leaking

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My 96 audi a4 has a leak some where, it seems to be coming from the dash in the passenger footwell and is forming a lake in the front and back of the passenger side.I also found some pinkish rubber hose...


sounds like the heater core has gone bad.it is under the dash on the passenger side. this could be the problem.have your mechanic check it out.good luck,hope this helps.

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I have an audi a4 2002 2.5 tdi sport estate. Last night it was raining cats and dogs all night. I started her up and drove to a right hand bend, as i turned i could hear water rushing from driver side to...


This is a common problem with your shape A4, pre 2001 A4s and old shape A6s. Rain water builds up in the area under the bonnet where your battery is. This can be accessed by removing the long black trim under the windscreen covering the battery. This area has two drain holes with small rubber tubes on it, these tubes get blocked over time by leaves, dirt etc. They need to be unblocked, and the tubes can be completely removed (and left off). This is much easier to do underneath the car but at least one can be done from the top. Its under the battery though. Be aware when you disconnect the battery, you will lose your radio coding.
It needs to be done though as if the water is coming in the car then it must be high. The water has most likely damaged your convenience control unit (electronic control unit) under the carpet of the footwell, this controls the failed electrical items you described. The water can cause further problems, electrical as it submerges the battery! And brakes as the brake servo can **** the water in causing many problems! Well worth getting it out sooner rather than later. Hope this helps and hasnt scared you too much. Good luck

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Here you can see how to change the cabin filter on the 1999 A4.
The text is in Portuguese but the pictures can give you an idea.

http://blog.a4.blog.br/2009/07/trocando-o-filtro-de-ar-da-cabine-do-a4.html

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SEE IF THE AIR COND. VENTILATOR IS WORKING WHEN YOU START IT (IT´S IN THE FRONT OF THE CAR BEHIND THE RADIATOR).

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