Features: Part number: Drive belt tensioner: 05184617AD, 5184617AD, 39282, 49484, 89632; Idler pulley: 89056015, 38082; Serpentine belt: 6PK2195, MCA0692, 865K6, 3522263, 53013864AA, 1L5E8620CB, 12569376, 25-060864, 4060865, 5060865, 5301 3905AA, 6K864, 80922 1160, 865K6, K060863, K060864, XL2Z 8620-BA. Function: the serpentine belt can transmit power to the engine accessories, and the tensioner can provide the necessary belt tension for the system, control vibration, reduce noise and prong the belt service life. The idler pulley can help enhance drivetrain stability. High performance: the belt tensioner assembly kit is manufactured from quality materials for durability and long life, providing just the right amount of fastening force and tension control for.