This multi-ribbed V-belt transmits power from the engine crankshaft to the cooling fan and the drive-system components that depend on it. It runs on the pulley set at the front of the engine, where its ribs engage the corresponding grooves to prevent slip under load. A belt that has stretched or developed cracks will cause the fan to turn below its design speed, reducing airflow across the radiator and raising coolant temperature. As an original-manufacturer part, the belt is molded to the same rib profile and pitch length as the assembly it replaces, so it seats fully in the pulley grooves without requiring a tensioner adjustment beyond the standard range. On installation, verify that the belt tracks centered on all pulleys before applying the specified tension.