This toothed V-belt transmits power from the engine crankshaft to the drive-system accessories, such as the alternator, water pump, or fan. It sits in the pulley grooves on the front of the engine, where its teeth engage the pulley faces to prevent slippage under load. A worn or glazed belt produces a squealing noise and reduces accessory output, which can lead to battery undercharge or engine overheating. As an original-manufacturer component, the belt is molded to the same tooth profile and pitch as the original assembly, so it seats fully in the pulley grooves without requiring tensioner adjustment beyond the standard specification. On installation, verify the belt routing matches the engine layout and tension it to the manufacturer's specification.