HDi 165 – Change timing belts after 6 years?

Hello to the round, I received a letter yesterday from my dealer, where after 6 years a timing belt change for the HDi-165 is strongly recommended. As reason stands “experience in our house” to avoid engine damage. I looked extra immediately. In the service book stands as a change interval for the timing belt 10 years or 240000 km. The writing first seems to have a certain taste for me. Therefore here the question in the round.QuAGE: – Are the Za hn strap of 163hp diesel so vulnerable that it is recommended to change prematurely? – Are premature timing belt cracks known in the engine? Greeting Peugeotpik