Had my belt changed today at 24K miles. The van is was registered Jan 2016, so the belt is proably 6 years old now. I had a look at the belt which was fine with no cracking or obvious signs of wear. However one of the pulleys had a lot of play in it and the fitter said I was lucky I had changed it when I did. Happy with the price as well maanged to find a gargae to fit it for £379 with a 5 year warranty.