V-Belt Tensioner (Automatic Transmission) | Mazda3 Sedan & Hatchback (2004-2013)

Your Mazda3's Belt tensioner is a pulley that is used to keep tension on the engine belts, so that it allows for the various engine accessories attached to it to function properly. A malfunctioning belt tensioner can affect the performance and functionality of the vehicle. Symptoms of a failing belt tensioner includes: grinding/squeaking noise form the belts or tensioners, unusual belt wear and failing of the accessories that are connected to the belt.