Dorman 419-154 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner

This Dorman accessory drive belt tensioner assembly is built to match the fit of the original equipment unit on specified applications. It helps maintain proper serpentine belt tension when the belt is slipping, worn, or has failed from fatigue.

Key Features

• OE-style fit for direct replacement on supported applications.
• Aluminum and plastic construction for a balanced, service-ready design.
• Counterclockwise rotation with a flanged pulley for the correct belt path.
• Serpentine belt application with a standard replacement grade.
• Hex bolt head design for straightforward service access.

Detailed Description

Part number 419-154 is an accessory drive belt tensioner assembly for vehicles that use a serpentine belt system. It is engineered to restore proper belt tension and support stable accessory drive operation when the original tensioner is no longer maintaining consistent load. This part number 419-154 is listed for Chrysler Aspen, Dodge Durango, and Dodge Ram applications, including Ram 1500, Ram 2500, Ram 3500, and Ram 4000 coverage across the specified model years.

The assembly uses an aluminum housing with a plastic pulley, a flanged pulley design, and a counterclockwise rotation specification. With a 7-groove pulley and standard replacement construction, it is suited for buyers looking for a direct-fit tensioner assembly for Chrysler Aspen and Dodge Ram belt service. Cross-reference part numbers include Continental 49374 and Dayco 89352 for the same application.

What It Is Used For

• Restoring belt tension when the serpentine belt slips.
• Replacing a worn tensioner assembly with fatigue-related loss of load.
• Addressing belt noise caused by inconsistent tension.
• Supporting accessory drive operation when the original assembly is no longer functioning correctly.
• Servicing belt drive components on Chrysler Aspen and Dodge Ram platforms.

Installation Notes and Tips

Verify belt routing, rotation direction, and pulley alignment before installation. Confirm the application uses a counterclockwise tensioner and a 7-groove serpentine belt setup. Inspect the belt for wear, glazing, or cracking before reassembly, since a damaged belt can shorten the service life of the new tensioner.

Quality Assurance

Dorman designs this assembly as a standard replacement part that matches the fit of the original equipment unit on listed vehicles. It is intended for direct-fit service on the specified applications.