Mr. Detail--If you give Volvo parts your engine/VIN number, you should get the right belt, along with a diagram for the new routing. There are dozens and dozens of belt lengths, depending on whether your engine is a turbo, has A/C or not, etc. Volvo changed the routing of the belt on some models, and the new routing takes a belt that is a fraction of an inch longer. Long enough, that if you install it using the old routing and then release the tensioner pulley, it won't be tight. What will make changing the belt much easier, is to loop it around all the pulleys with the tensioner pulley on the inside being last. The reason is because all the pulleys except the tensioner pulley have a little shoulder on them. Not much, but enough to make you swear like a trooper trying to get the belt over the last one. Dick