The famous Audi leak: wet footwell, damp headlining, a module gone quiet
Q5 · SQ5 · Q7 · Q3 · A4 · A6 · TouaregHow it shows up
Water on the front passenger floor after rain, a wet patch at the front of the headlining, the sunroof switch area damp, and on the Q5 and Q7 a dead or misbehaving module under the carpet or in the footwell. Owners search the fault and find a forum full of the same complaint.
Why it gets misread
The seal gets replaced and silicone goes around the glass, which does nothing, because the roof is designed to let water past the seal into a tray and out through four drains. On the Q5, the Q7 and the Touareg the drain tubes kink or block where they pass the pillars and the tray overflows into the car. The dealer answer is a roof cassette; the cause is a tube.
What we do
Every drain flow-tested and cleared to its exit, kinked tubes rerouted, hoses refitted, the tray cleaned, then a controlled water test with the trim open so you see the water leave where it should. If a module has already been sitting in water, we tell you what we found. The method is on the leak page.