GMB 480-3457 Engine Timing Belt Tensioner Hydraulic Assembly

Engine Timing Belt Tensioner for Audi and Volkswagen

The GMB 480-3457 engine timing belt tensioner hydraulic assembly is built for precise belt control in select Audi and Volkswagen applications. Manufactured to meet or exceed OEM specifications, it supports stable timing belt tension and consistent engine operation in demanding valve train systems.

Compatible with 1999-2005 Volkswagen Passat, 1999-2004 Audi A6 Quattro, 2002 Audi RS4, 2000-2002 Audi S4, 1999-2001 Audi A4, 1999-2001 Audi A4 Quattro, 1999-2001 Audi A6, and 2001-2005 Audi Allroad Quattro.

• GMB Part Number: 480-3457
• Engine timing belt tensioner hydraulic assembly for valve train service
• Built to OEM specification targets for fit and function
• Metal pulley construction
• 1-groove pulley design
• Serpentine and V-belt pulley type

Detailed Product Overview

This GMB timing belt tensioner hydraulic assembly is engineered for vehicles that rely on accurate belt tension to maintain proper engine timing. The metal pulley and single-groove design support controlled belt tracking, while the hydraulic assembly helps maintain consistent tension under operating conditions. The GMB 480-3457 is a direct-fit service part for select Audi A4, Audi A6, Audi S4, Audi RS4, Audi Allroad Quattro, and Volkswagen Passat applications.

This part cross-references Dayco 85018 and Gates T43026 for the same application.

Common Repair Uses

• Restores proper timing belt tension after wear or hydraulic loss
• Addresses belt noise caused by a weakened tensioner assembly
• Helps correct timing belt tracking issues related to pulley wear
• Supports service replacement during timing belt maintenance
• Replaces a damaged or out-of-spec tensioner on Audi and Volkswagen engines

Installation Notes and Tips

Verify engine code and vehicle application before installation. Because this is a timing belt tensioner hydraulic assembly, it should be installed during a complete timing belt service when the belt system is already disassembled. Inspect related components such as idlers, pulleys, and the timing belt for wear before reassembly.

Quality Assurance

GMB manufactures this part to meet or exceed OEM specifications, supporting consistent fitment and dependable service performance for the listed Audi and Volkswagen applications.