Dorman 419-422 Accessory Drive Belt Tensioner Assembly

Dorman 419-422 Accessory Drive Belt Tensioner

The Dorman 419-422 accessory drive belt tensioner assembly is built to match the fit of the original equipment unit on specified vehicles. It restores proper serpentine belt tension on Chevrolet Cruze, Chevrolet Sonic, Chevrolet Trax, Chevrolet Cruze Limited, and Saturn Astra applications when the belt is slipping, worn, or broken from fatigue.

• Direct-fit accessory drive belt tensioner assembly for specified GM vehicles
• OEM-grade aluminum housing for strength and corrosion resistance
• Single pulley design with stainless steel pulley material
• Serpentine belt application
• Hex / hexagonal bolt head type
• Flanged pulley design
• Clockwise and counter-clockwise configurations listed in fitment data

Fitment Details

• Fits 2013-2020 Chevrolet Trax
• Fits 2012-2018 Chevrolet Sonic
• Fits 2010-2016 Chevrolet Cruze
• Fits 2016 Chevrolet Cruze Limited
• Fits 2008-2009 Saturn Astra

Product Overview

This Dorman accessory drive belt tensioner assembly, part number 419-422, is designed for vehicles using a serpentine belt system and an OE-style mounting layout. The aluminum housing, stainless steel pulley, and flanged pulley construction support consistent belt tracking and proper tension control in the accessory drive system. For shoppers searching for a Dorman 419-422 belt tensioner for Chevrolet Cruze, Sonic, or Trax, this assembly provides a direct replacement option for the listed applications.

This part cross-references Dayco 89645 for the same application.

What It Helps Address

• Belt slipping under load
• Noise caused by a worn tensioner assembly
• Loss of belt tension from fatigue
• Broken or weakened original tensioner components
• Serpentine belt drive instability

Installation Notes and Tips

Verify belt routing, pulley alignment, and tensioner rotation direction before installation. Confirm the vehicle’s year, make, model, and belt system match the listed fitment for Dorman 419-422. Inspect the serpentine belt, idler pulleys, and related accessory drive components at the same time to avoid repeat service.

Quality Assurance

Dorman designs this assembly to match original equipment fit and function on the specified vehicles. The OEM-grade construction and application-specific design support reliable replacement service for the listed Chevrolet and Saturn models.