How do you replace serpentine belt on 1998 Volvo model S70?

To replace the serpentine belt on a 1998 Volvo S70, first, ensure the engine is off and cool. Locate the serpentine belt tensioner and use a wrench to relieve tension on the belt, allowing you to slide it off the pulleys. Then, remove the old belt and route the new belt according to the diagram usually found on a sticker in the engine bay. Finally, reapply tension using the tensioner and double-check the belt's alignment before starting the engine.