Now I'm confused - it's well documented that the tensioner is the part that fails (or more specifically, any original fitment tensioner which is pre-latest spec). I think Volvo's 108k interval for the tensioner must be on the assumption that you have had the latest spec tensioner fitted already? I haven't a schedule to hand, but I would guess the instruction is to replace the original tensioner at or before 54k miles with the latest spec part, then let it go to 108k and replace with the belt (because you could have had the tensioner replaced initially at a low mileage as I think some were done under recall regardless of mileage?) and then 108k intervals thereafter. It wouldn't make sense for Volvo to let an original go to 108k given the known issues, but I stand to be corrected
