Dorman 419-628 Accessory Drive Belt Idler Pulley

Durable Steel Accessory Drive Belt Idler Pulley for Select Vehicles

The Dorman 419-628 accessory drive belt idler pulley is engineered to provide reliable tension and smooth operation for serpentine belt systems. Designed specifically for various Acura, Audi, BMW, Buick, Chevrolet, Chrysler, Ford, GMC, Honda, Lincoln, Mercury, Oldsmobile, Pontiac, and Saturn models, this pulley ensures proper belt alignment and performance.

• Constructed from durable steel with a black finish for corrosion resistance
• Inside diameter of 45 mm and outside diameter of 76 mm for precise fitment
• Width dimensions of 28 mm and 32.2 mm accommodate specific belt routing
• Single mounting hole for secure installation
• Designed for serpentine belt systems with one bearing of 14 mm width
• Material thickness of 2.3 mm for strength and longevity
• Package includes one idler pulley, part number 419-628

Product Details and Specifications

The Dorman 419-628 idler pulley is a specific fit component tailored for accessory drive belt systems on select vehicle models such as the Acura Accord, Audi A4 Quattro, BMW 525i, Chevrolet Impala, and Honda Pilot. Its steel construction provides durability under continuous belt tension and heat exposure. The pulley features a single groove-free design compatible with serpentine belts, ensuring smooth belt tracking and reduced wear. The 45 mm inside diameter and 76 mm outside diameter dimensions align with factory specifications, while the 2.3 mm material thickness adds structural integrity. This pulley includes one bearing with a 14 mm width to support rotational movement and reduce friction.

Common Applications and Problem Resolution

• Replaces worn or damaged idler pulleys causing belt misalignment or noise
• Addresses belt slippage or squealing due to pulley bearing failure
• Restores proper tension in serpentine belt systems on compatible Acura, Audi, BMW, Chevrolet, and Honda models
• Prevents premature belt wear by maintaining correct belt routing
• Eliminates vibration and pulley wobble from degraded components

Installation Notes and Tips

Installation of the Dorman 419-628 idler pulley requires removal of the serpentine belt and old pulley. Ensure the mounting surface is clean and free of debris before securing the new pulley with the factory mounting bolt. Verify belt alignment and tension after installation to prevent premature wear. This pulley is designed for specific vehicle applications; consult your vehicle’s service manual for torque specifications and belt routing diagrams.

Quality Assurance and Warranty

Dorman manufactures the 419-628 idler pulley to meet or exceed OEM standards for fit, form, and function. The steel construction and precision bearing contribute to long service life under normal operating conditions. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in material and workmanship. For exact warranty terms, refer to Dorman’s official documentation or contact the manufacturer directly.