Accessory Drive Belt Idler Pulley

The Dayco 89038 is an accessory drive belt idler pulley engineered to maintain proper tension and routing of serpentine belts. Constructed from durable steel, this pulley ensures resistance to wear and deformation under demanding engine conditions. It is designed with four grooves, accommodating serpentine belts up to 4 ribs wide, and features a single bearing with a 12mm inner diameter and 12mm width for stable, consistent rotation. This idler pulley is a direct OE replacement, meaning it offers a bolt-on fit with no modifications required for installation. By maintaining correct belt routing and tension, it supports the smooth operation of critical accessories like the alternator, power steering pump, and A/C compressor. The Dayco 89038 is compatible with a wide range of vehicles, including many models from Toyota (such as 4Runner, Celica, Corolla, Supra, Tacoma, Tercel, Tundra), Acura (Legend), Chevrolet and Geo (Metro, Prizm), Mazda (929), Mercury (Capri), Mitsubishi (Eclipse), and Plymouth (Sundance). Installation notes suggest ensuring proper belt routing, checking bearing smoothness, using correct torque specifications, and inspecting the belt for wear.