Hi Mark,
You are not alone.
I’m dealing with exactly the same water ingress issue on my Audi A6 Avant. I bought the extended All-in Warranty when the car was serviced back in October. Then in late January, my driver’s seat suddenly stopped moving. When I looked into it, I found the rear passenger footwell behind the driver’s seat completely soaked.
Audi Birmingham inspected the car and came back with a quote of nearly £6,000. That includes drying the carpets, repairing the wiring loom, and fixing the OSF wheel arch liner. Oddly enough, the wheel arch liner “rectification” wasn’t even priced on the report.
When I asked what caused it, I was told the water had been getting in through failed sealing bungs underneath the car and had built up over time. If that’s the case, I don’t understand how nothing was picked up during the October service. The answer I got was basically that a routine service isn’t a strip-down inspection, and they can’t predict issues if there’s nothing obvious at the time.
I also brought up the well-known TSB as this seems to be a recognised issue. I was told that a TSB is just a repair guide for technicians and not an admission of a manufacturing defect.
I tried appealing through the warranty, but after going through the policy wording with them, it turns out wiring looms and bodywork/parts are specifically excluded. So from their point of view, they’re relying on that exclusion to decline the claim.
The service manager then offered a “goodwill” repair at £3,600, which I declined. I raised a formal complaint with Audi UK, and today I received their final response — no additional goodwill support.
It’s incredibly frustrating to be facing a bill like this for something that feels like a known issue and completely outside of the owner’s control. I’m really disappointed with how this has been handled and am considering taking it further.
But one thing’s certain - after this experience, no Audi again for me.