The AC belt in your air conditioner system drives the compressor and/or other components such as the water pump, alternator, and power steering pump. In order for it to perform efficiently and accomplish a positive output of harnessing power to these components, it must be kept tensioned and tight with the help of the 4 Seasons idler pulley. In a belt-driven system, this pulley allows adjustment for the belt, allowing it to constantly be well tensioned and prevent slacking. It can be found underneath the engine, specifically at the passenger's side. In order for the engine power to be transferred to various components, the AC belt will ensure that power is harnessed efficiently and this can be successfully accomplished with the help of the 4 Seasons AC idler pulley. But in time, this pulley can wear out due to normal aging, over tightening, or incorrect installation. If your vehicle has an automatic transmission, see to it that the AC idler pulley is mounted before the bracket which holds the transmission cooler lines into the engine. If this bracket is mounted first, the AC idler pulley can be bent and a positive contact with the belt will fail and may only serve for a limited lifespan. Never use inferior quality idler pulley, acquire only durable and custom fit 4 Seasons AC idler pulley for your vehicle. Choose from its huge array of selections on our most updated online catalog. Great deals and auto parts at affordable prices await you so do not think twice, access now our online catalog and get the best idler pulley that matches your vehicle's specifications.