2007 gti, not tuned/ modified. 1st cambelt change in 2011 at 23000 miles, next change 2015 at about 42000 miles. I would prefer to pay for a new belt as opposed to a new engine. Belts wear as well as deteriorate with age. As my garage said- we will only do a belt change if we do the water pump as well. As much as we'd like to just do the belt and then a few weeks later do the belt again and replace the water pump as it has started to leak, and charge you loads of money more, but our service manager unfortunately has morals.........