Ive had power loss problems with my 2001 S3 over the last 3 months, the turbos have been cutting out whilst driving/accelerating, especially at higher speeds, there have been times when they havent even kicked in. The computer didnt register a fault but the Audi technician said that the turbos were over boosting? providing too much pressure? They took it on a road test a couple of times before they experienced the fault. I dont have a clue about these things. But they ordered me a new turbo. Has anyone else had these problems?