This V-belt transmits power from the engine crankshaft pulley to the drive-system accessory pulleys. It sits in the front-end accessory drive, routing around the alternator, water pump, and any idler pulleys in the circuit. A worn belt slips under load, causing undercharging or overheating as the driven components lose speed. The belt is constructed with a cogged inner profile that allows it to bend around smaller-diameter pulleys without generating excessive heat. On installation, ensure the belt is seated fully in each pulley groove and that the tensioner is adjusted to the manufacturer's specification.