9 months ago I had a new timing belt fitted on my 2009 Audi A6, 108,000 miles (the second belt I've had fitted). The bolt securing the timing belt tensioner failed and snapped off as confirmed by an Audi dealer. I have contacted the garage who fitted the belt and the car will taken to them for "evaluation". I know it's likely that the engine has been severely damaged as a result. Given that they fitted a timing belt kit where does liability lie in this situation? Is there any standard warranty on car parts? How should I best handle the situation with the garage? I simply cannot afford a new car or engine. What is my legal position here so I can negotiate with them?