i believe that this unit only has 2 belts. a main drivebelt and an accessory belt. however, like everyone else said, check under the hood to be sure. belts should be checked as routinely as when you change the oil. If the belts are cracked, ripped, torn, making noise then it is time to change the belt. Also, any time you replace a tensioner or pulley, you might as well replace the belt. It's a simple job that can save frustration down the road.