I have a 2003 A8 that has done 28000 miles and my main dealer has replaced the discs (on the approval of the Mrs) and said that they recommend replacing them after 30,000 miles ...because it is a heavy car.. I ran an XJR for 60,000 miles from new and did not replace the discs. I had a 911 turbo that I ran for 30,000 miles and did not replace the discs. Does anyone know how long a set of discs is supposed to last. Seems funny they needed replacement on the first service after it came out of warranty.