There is confusion on the belt service interval. Volvo caused it due to the same exact parts on different emissions versions of the same engine family using differing schedules. The belt is often OK but the idler or tensioner rollers may be reaching its end before 150K. There are only two one way cl...

A few links that may help to understand what needs to be done Note: the pictures at the end of this first link are for an XC90 https://www.freel2.com/forum/topic33363.html A post that shows what the overdrive pulleys look like https://www.freel2.com/forum/topic33867.html A nice video https://www.you...