Mine failed at 72k. Heard a slight exhaust leaking sound that got worse over a few days. The day it was due to be looked at it just went, sounded like it had no exhaust!
Took it into ats, they said sorry, cant touch it, the manifold has gone..VW job I'm afraid... I thought fu*k..
Took it to the stealers and it turned out the be the downpipe, the pre-cat can had a great big split in it.
This could be down to me as I do give it a lot of stick very often so it does get lots of hot/cold fatigue. Then again could just be a normal failure..