Two days ago the cambelt went on my S3, at 73k. The car hasn't been re-mapped and I've had no modifications done to any part of the engine. I'm being quoted nearly £1,700 to fix this (replace bent valves in Cyl 3 and replace belt etc) which I am understandably annoyed about because the part should not have failed in the first place. The service book says the belt should be replaced at 120,000 and I've not had any advice from Audi to the contrary!!! I'm waiting to hear back from Audi UK about their contribution but wanted to hear if anyone has any experience of something similar and what Audi did for them, also any guidance on reducing this cost would be appreciated.