Dorman 419-209 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for Ford and Mazda Trucks

The Dorman 419-209 accessory drive belt tensioner assembly is designed to maintain proper tension on serpentine belts in select Ford and Mazda trucks. Engineered for durability and precise fitment, this tensioner supports smooth operation of your vehicle's accessory drive system.

• Compatible with Ford B2300, B2500, and Ranger models
• Includes belt tensioner, 1 bolt, and 1 washer for complete installation
• Features a steel AISI 1008 pulley with a 40 mm bearing diameter
• Counterclockwise rotation tensioner for accurate belt alignment
• Single pulley design with one pulley bearing for reliable performance
• Serpentine belt type with 17 mm inside diameter and 76 mm outside diameter
• Multiple width measurements: 20 mm and 31 mm for precise fit

Detailed Product Description and Specifications

The Dorman 419-209 accessory drive belt tensioner assembly is engineered to meet the specific requirements of Ford B2300, B2500, and Ranger trucks, as well as compatible Mazda models. This tensioner features a robust steel AISI 1008 pulley, which ensures long-lasting durability under demanding engine conditions. The pulley has a 40 mm bearing diameter and is supported by a single pulley bearing, providing smooth rotation and reducing wear on the serpentine belt.

Designed for serpentine belt systems, this tensioner has an inside diameter of 17 mm and an outside diameter of 76 mm, with widths of 20 mm and 31 mm to accommodate the belt profile accurately. The tensioner rotates counterclockwise, aligning with the original equipment specifications to maintain proper belt tension and prevent slippage or noise.

Common Applications and Problem Solving

• Restores proper tension to serpentine belts in Ford B2300, B2500, and Ranger trucks
• Eliminates belt squealing caused by loose or worn tensioners
• Prevents premature belt wear and extends accessory component life
• Addresses pulley bearing noise or failure in accessory drive systems
• Corrects misalignment issues that can lead to belt damage

Installation Notes and Tips

• Includes all necessary hardware: 1 bolt and 1 washer for secure mounting
• Ensure the tensioner rotates counterclockwise to match factory setup
• Inspect serpentine belt condition and replace if worn during installation
• Use proper torque specifications for bolt installation to avoid damage
• Verify belt alignment after installation to prevent premature wear

Quality Assurance and Warranty Information

Dorman manufactures the 419-209 accessory drive belt tensioner assembly to meet or exceed OEM standards for fit, form, and function. The steel pulley and quality bearing components are designed for durability and reliable performance. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship under normal use.