This multi-ribbed belt transmits power from the engine crankshaft to the accessory drive components, including the alternator, water pump, and fan. It sits in the front engine drive system, routing around multiple pulleys to synchronize rotation. A worn belt slips under load, causing reduced alternator output and elevated coolant temperature. The belt's rib profile matches the pulley grooves of the original assembly, maintaining proper tension and preventing misalignment. On replacement, inspect the tensioner and idler pulleys for wear and ensure the belt is routed correctly per the drive diagram.