Dorman 419-404 Accessory Drive Belt Tensioner Assembly

Durable Accessory Drive Belt Tensioner Assembly for Dodge, Jeep, and Mercedes-Benz

The Dorman 419-404 accessory drive belt tensioner assembly is engineered to provide reliable belt tension and smooth operation for select Dodge, Jeep, and Mercedes-Benz vehicles. Constructed with high-quality aluminum and steel components, this tensioner assembly ensures long-lasting performance and precise fitment.

• Material: Aluminum body with a steel pulley for enhanced durability
• Bolt Head Type: Round-head for secure mounting
• Pulley: Flanged design to maintain belt alignment
• Dimensions: 6.75 inches length, 30 mm width, 65 mm outside diameter
• Includes bushing for smooth rotation and reduced wear
• Compatible with clockwise (CW) rotation belt systems
• Color: Silver and black finish for corrosion resistance

Detailed Description of Dorman 419-404 Tensioner Assembly

This accessory drive belt tensioner assembly features an aluminum housing that offers a lightweight yet sturdy structure, paired with a steel pulley designed to withstand the stresses of continuous belt tension. The round-head bolt type facilitates proper installation and secure attachment. The flanged pulley helps keep the belt properly aligned, reducing the risk of slippage or premature wear. With an inside diameter of 5 mm and a bearing bore inside diameter of 0.42 inches, this tensioner is engineered for precise fitment and smooth operation. The assembly is designed for clockwise rotation systems, making it suitable for specific engine configurations found in Dodge Grand Cherokee, Jeep Grand Cherokee, and various Mercedes-Benz models including E320, ML350, and Sprinter 2500.

Compatible Vehicles and Applications

• Dodge Grand Cherokee (various years)
• Jeep Grand Cherokee
• Mercedes-Benz E320, E350, GL320, GL350, GLE350d
• Mercedes-Benz ML320, ML350
• Mercedes-Benz R320, R350, S350
• Mercedes-Benz Sprinter 2500 and 3500

Common Issues Addressed by This Tensioner Assembly

• Eliminates belt slippage caused by worn or weak tensioners
• Prevents premature belt wear due to misalignment
• Reduces noise from loose or failing tensioner pulleys
• Restores proper belt tension for optimal accessory performance
• Helps avoid engine overheating by maintaining accessory drive function

Installation Notes and Tips

Ensure the engine is cool before beginning installation. Verify the belt routing and tensioner orientation match the clockwise rotation specification. Use the round-head bolt for secure mounting and torque to manufacturer specifications. Inspect the accessory drive belt for wear and replace if necessary to ensure optimal performance. Proper alignment of the flanged pulley is critical to prevent belt damage.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 419-404 tensioner assembly undergoes rigorous quality control to ensure fit and function. Please refer to Dorman's warranty policy for specific coverage details.