A couple years ago the 2007-2012 Q7 and 2009-2012 Q5 were recalled to fix leaking fuel pump flanges.
At the time, there weren't enough replacement flanges to go around. In a let's-see-if-this-works move Audi slapped some butyl tape around the existing flanges to prevent future leaks. It didn't.
Turns out if the flange has already been exposed to outside contaminates, covering it in tape will only prolong the inevitable leak. About 6,000 vehicles are being recalled again, hopefully this time for a more permanent repair.…keep reading article "Previous Q5 and Q7 Fuel Pump Repair Being Recalled"