Dorman 419-474 Accessory Drive Belt Idler Pulley - Left or Right

Dorman 419-474 Accessory Drive Belt Idler Pulley

Dorman 419-474 is a direct replacement accessory drive belt idler pulley engineered to match the function and performance of the original pulley on select Ford Super Duty applications. It is built for specific left- and right-side fitments on Ford F-250 Super Duty, F-350 Super Duty, and E-350 Super Duty models.

For buyers searching for a Ford F-250 Super Duty idler pulley or a Ford F-350 Super Duty accessory drive belt pulley replacement, this OE-style part number 419-474 provides a specific-fit solution for restoring belt routing and drive system operation.

Key Features

• Direct replacement accessory drive belt idler pulley
• Specific fit for select Ford Super Duty applications
• Plastic pulley construction with black finish
• V-belt pulley design with smooth backside surface
• Flanged pulley design on pulley 1
• OEM-grade replacement for original equipment-style service
• Part number 419-474 for easy identification

Detailed Description

This Dorman accessory drive belt idler pulley is engineered to restore proper belt guidance and support in the accessory drive system. It is listed for select 2016-2021 Ford F-250 Super Duty, 2016-2021 Ford F-350 Super Duty, and 2017-2018 Ford E-350 Super Duty applications, with left- or right-side fitment depending on the vehicle and model year. The pulley uses a smooth backside V-belt design and is built as a specific-fit replacement rather than a universal part.

This part cross-references Dynomax 36491 for the same application. If you are replacing a worn Ford Super Duty idler pulley, Dorman 419-474 is a practical OE-style option for maintaining correct belt path alignment and accessory drive operation.

What It Helps Address

• Belt noise caused by a worn idler pulley surface
• Improper belt tracking in the accessory drive system
• Visible pulley wear or cracking on the original part
• Accessory drive belt vibration from a damaged pulley
• Loss of smooth belt routing on select Ford Super Duty models

Installation Notes and Tips

• Verify side-specific fitment before ordering: applications are listed for left and right positions depending on year and model.
• Confirm the vehicle build date on 2016 Ford F-250 Super Duty and F-350 Super Duty applications noted as from 5/25/15.
• Inspect the belt, tensioner, and adjacent pulleys during service to avoid repeat noise or alignment issues.
• Match the pulley style and dimensions to the original component before installation.

Quality Assurance

Dorman designs this replacement pulley to match the function and performance of the original equipment part on the listed Ford applications. Part number 419-474 is built as an OEM-grade replacement for specific vehicle fitment and accessory drive service.