This multi-ribbed belt drives the air conditioning compressor from the engine crankshaft. It transmits power through multiple V-shaped ribs that contact the pulley grooves, providing grip without the need for high tension. A slipping or worn belt reduces compressor speed, leading to poor cabin cooling and potential belt squeal. The belt is manufactured by Dayco, whose tooling matches the original pulley profile so the ribs seat fully in the grooves without riding high. On installation, verify the belt tracks centrally on all pulleys and that the tensioner operates within its travel range.