The engine's four strokes are perfectly timed with the rest of the components involved in the power generation. To ensure perfect timing, a reliable timing belt is used. This belt is, in turn, maintained by a tensioner and idler pulleys including the accessory belt idler pulley. This component routes the timing of the serpentine belt from one accessory belt to another. It also ensures proper alignment of the belt and the angle of deflection of pulleys. Once its bearing becomes damaged, it will need replacement to restore its functions. Installation of the accessory belt idler pulley is one of the most basic engine works a vehicle owner like you have to deal with over time. To do so, you will need a belt tensioner tool to move the tensioner aside, slip the timing belt from the idler, and move the tensioner back in place. Remove the mounting bolt of the idler, lift the pulley, and put the new part in place. Move the tensioner once more to let the belt slip into the new idler pulley. There is a location map on the fan shroud to easily locate these accessories. To find the exact match accessory belt idler pulley for your make and model, go to Car Stuff! Our complete line includes quality components from only the top manufacturers around the world. Our catalog accepts online orders and we ship them directly to our customers' addresses so you don't need to move another muscle or consume even a drop of fuel!