Aux belt changes time interval

[Bleu]

What is the official time interval between aux belt changes on a 1*2, 3 or 5 years?

 

[Krarl]

3 years

 

[Brigsy]

Book is 3 years from memory.

One of my mates who worked for ren claimed they recommended yearly changes on the ac aux setup if doing a few miles as it give so many issues, with tensioner seizing etc.