Dorman 420-171 Engine Timing Belt Tensioner

Dorman 420-171 Timing Belt Tensioner

This Dorman engine timing belt tensioner is a standard replacement for select Audi and Volkswagen applications. Built with an aluminum alloy body and die cast aluminum contact surface, it matches the fit and function of the original tensioner for reliable timing belt control.

Key Features

• Automatic hydraulic tensioner style for consistent belt tension
• Aluminum alloy construction for strength and durability
• Die cast aluminum contact surface for stable belt contact
• Standard replacement design for OE-style fit and function
• Direct replacement for select Audi A4, Audi A6, Audi S4, Audi A6 Quattro, Audi Allroad Quattro, and Volkswagen Passat applications
• Part number 420-171 for easy identification and ordering

Detailed Description

Dorman 420-171 is engineered as a direct-fit engine timing belt tensioner for vehicles that use an automatic hydraulic tensioner design. It is built to match the original component’s fit and function, helping maintain proper timing belt tension in select 1998-2005 Audi A6 and A6 Quattro models, 1999-2001 Audi A4, 2000-2002 Audi S4, 2001-2005 Audi Allroad Quattro, and 1998-2005 Volkswagen Passat applications. This part cross-references Gates T43026 for the same application.

The aluminum alloy construction and die cast aluminum contact surface support dependable operation in the engine timing system. If you are replacing a worn timing belt tensioner on an Audi A4, Audi A6 Quattro, or Volkswagen Passat, Dorman 420-171 provides a direct replacement option built for the specified fitment.

What It Helps Fix

• Timing belt slack caused by a worn hydraulic tensioner
• Noise from a failing timing belt tensioner assembly
• Inconsistent belt tension in the engine timing system
• Premature timing belt wear from poor tension control
• Service issues during timing belt maintenance on select Audi and Volkswagen engines

Installation Notes

Verify engine code and vehicle fitment before installation. This tensioner uses an automatic hydraulic style and does not include a pulley or bracket. Follow the manufacturer service procedure for timing belt alignment, tensioner setup, and final inspection. For best results, inspect related timing components during service on compatible Audi and Volkswagen models.

Quality Assurance

Dorman designs this replacement tensioner to match original fit and function on the listed applications. It is manufactured from quality materials for reliable performance and durability in the engine timing system.