Dorman 419-040 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for Chrysler and Dodge Vehicles

The Dorman 419-040 accessory drive belt tensioner assembly is engineered to maintain optimal serpentine belt tension for a range of Chrysler, Dodge, Jeep, and Ram models. Designed with durable steel construction and a plastic pulley, this tensioner ensures consistent performance and longevity in demanding engine environments.

• Constructed from robust steel for strength and durability
• Black finish with a length of 147 mm and width of 25 mm
• Features a single serpentine belt groove and one pulley with a 21.8 mm bearing diameter
• Includes one mounting hole with a diameter of 10.3 mm for secure installation
• Counterclockwise tensioner rotation with a maximum adjustment range of 32 mm

Detailed Product Description and Specifications

The Dorman 419-040 accessory drive belt tensioner assembly is designed to provide precise tension control for serpentine belts in vehicles such as the Chrysler 200, 300, Dodge Charger, Challenger, Jeep Grand Cherokee, and Ram 1500 Classic. The tensioner’s steel body offers structural integrity, while the plastic pulley reduces weight and friction. With an inside diameter of 10 mm and an outside diameter of 70 mm, the pulley is engineered to accommodate the belt smoothly. The single groove design supports serpentine belt systems, and the tensioner’s counterclockwise rotation ensures proper belt alignment and tensioning. This assembly includes one automatic belt tensioner, simplifying replacement and maintenance.

Compatible Vehicles and Common Applications

• Chrysler 200, 300, Town & Country, Grand Caravan
• Dodge Avenger, Charger, Challenger, Durango
• Jeep Grand Cherokee, Journey
• Ram 1500, 1500 Classic, ProMaster 1500, 2500, 3500
• Compatible with serpentine belt accessory drive systems

Common Issues Addressed by This Tensioner

• Eliminates belt slippage and squealing noises
• Prevents premature belt wear and damage
• Maintains proper belt tension for accessory components
• Reduces risk of engine overheating due to belt failure
• Improves overall engine accessory drive reliability

Installation Notes and Tips

When installing the Dorman 419-040 tensioner, ensure the mounting hole aligns precisely with the engine bracket using the 10.3 mm diameter hole. Verify the tensioner rotates counterclockwise to match factory specifications. Inspect the serpentine belt for wear and replace if necessary during installation. Proper torque specifications should be followed to secure the tensioner without over-tightening. This assembly is designed for direct replacement on compatible Chrysler, Dodge, Jeep, and Ram models.

Quality Assurance and Warranty Information

Dorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM standards for fit, form, and function. The steel construction and quality bearing materials contribute to long service life. This product is backed by Dorman’s limited warranty, providing coverage against defects in materials and workmanship under normal use conditions.