It is an 2001 A6 2.8, but all Audi's with cam sensors will have the same part. it is actually the Cam positioning sensor trigger plate. It is the part that is attached to the cam that the sensor reads to determine its position of the cam. I marked it with with a marker and removed it as it needs to be removed to replace the rear cam seal that precedes it. I did not need to mark it as there is a little tough that fits in a grove in the cam that lines it up. The question I have not is what its the torq spec to the bolt that holds it on the cam?
