Rigorously tested for a sustained, secure performance by a team of product and quality engineers, Dorman's Automatic Belt Tensioner Assembly is designed to provide proper tension to a vehicle's serpentine belt. It incorporates a damping design, torsion spring, and sealing system to ensure the proper functioning of many integral engine components. The Automatic Belt Tensioner Assembly is recommended for replacement when replacing the serpentine belt. Vehicle model years this part fits: Chevrolet Camaro: 1998, 1999, 2000, 2001, 2002 Pontiac Firebird: 1998, 1999, 2000, 2001, 2002