Maybe I will add, because I had adventures with a multi-ribbed belt, as well as my friends, that more often the cause of such a failure is seizure or large slack on the tensioner roller than the belt itself.
Added after 3 [hours] 13 [minutes]:
Now I see, no one is commenting anymore. My previous post was meant to comment sofi666 why was he thinking of replacing the belt?
I will write this - when you try to replace it, it is better to check the condition of the tensioner, because it may soon turn out that the belt is replaced, but the tensioner will make the new belt "live" for a short time.