Dorman 419-377 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for Nissan Vehicles

The Dorman 419-377 accessory drive belt tensioner assembly is engineered to maintain optimal serpentine belt tension for Nissan Maxima, Murano, and Quest models. Constructed with durable aluminum and steel components, this tensioner ensures consistent performance and longevity in your vehicle's accessory drive system.

• Material: Aluminum tensioner body with steel pulley
• Compatible with serpentine belt systems
• Length: 115 mm; Outside diameter: 70 mm
• Mounting hole quantity: 3 with 8.2 mm diameter
• Single pulley with one bearing (40 mm diameter)
• Maximum adjustment range of 55 mm for precise belt tension
• Clockwise (CW) tensioner rotation
• Color: Black and silver finish for corrosion resistance

Technical Details and Specifications

The Dorman 419-377 tensioner assembly features a robust aluminum construction that balances strength and weight, paired with a steel pulley designed for durability under continuous operation. The tensioner measures 115 mm in length and includes three mounting holes sized at 8.2 mm diameter, ensuring secure installation. Its single pulley incorporates a 40 mm bearing to facilitate smooth rotation and reduce wear. Designed specifically for serpentine belt systems, this tensioner provides a maximum adjustment range of 55 mm, allowing for precise belt tensioning to prevent slippage and premature belt wear. The clockwise rotation aligns with the accessory drive configuration of Nissan Maxima, Murano, and Quest models.

Compatible Nissan Models and Applications

This accessory drive belt tensioner assembly is compatible with the following Nissan vehicles:

• Nissan Maxima
• Nissan Murano
• Nissan Quest

It is designed to replace worn or faulty tensioners in these models, restoring proper belt tension and ensuring reliable operation of engine accessories such as the alternator, power steering pump, and air conditioning compressor.

Common Issues Addressed by This Tensioner

• Excessive belt noise due to improper tension
• Serpentine belt slippage or premature wear
• Loss of accessory function caused by belt misalignment
• Vibration or pulley bearing failure
• Difficulty maintaining correct belt tension after repairs

Installation Notes and Tips

When installing the Dorman 419-377 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s service manual. Use the three mounting holes with 8.2 mm diameter bolts to secure the tensioner firmly. Verify the tensioner rotates clockwise and that the belt maintains correct tension throughout the adjustment range. Inspect the pulley bearing for smooth operation before installation. It is recommended to replace the serpentine belt simultaneously to maximize system reliability.

Quality Assurance and Warranty

Dorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM specifications for fit, form, and function. The aluminum and steel materials provide corrosion resistance and durability under normal operating conditions. This part is backed by Dorman’s standard warranty coverage, ensuring confidence in its performance and longevity when installed on compatible Nissan Maxima, Murano, and Quest vehicles.