Dorman 419-623 Drive Belt Idler Pulley Replacement stops squeak, squeal or groaning noise associated with a worn idler pulley Constructed for long-lasting durability against heat, shock and corrosion Dorman Idler Pulleys feature a high-quality double-sealed bearing to resist damage from contaminants Direct replacement and direct fit for a trouble-free replacement Vehicle try-on testing and rigorous materials testing to ensure high-quality performance