Dorman - Techoice 419-597 Idler Pulley Strong plastic construction for long-lasting durability against heat, shock and corrosion Replacement stops squeak, squeal or groaning noise associated with a worn idler pulley Direct replacement and direct fit idler pulleys for a trouble-free replacement Vehicle try-on testing and rigorous materials testing to ensure high-quality performance Original Equipment (OE) Number: 4891797AB