Hayden 5974 Accessory Drive Belt Idler Pulley - Alternator

Accessory Drive Belt Idler Pulley

Hayden 5974 is an accessory drive belt idler pulley built for serpentine belt systems. It uses a smooth plastic pulley design with a black finish, a 1.00 in. belt width, and a 2.99 in. outside diameter for OE-style belt routing and support.

This Hayden Pulley line component is made for direct replacement service in accessory drive belt systems where a back idler or tensioner-style pulley is required. It meets or exceeds OEM requirements and is listed for applications including Audi A3, Audi A8 Quattro, Ford Ranger, and Chevrolet Corvette.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Hayden part number 5974
• Plastic pulley construction with black finish
• Smooth groove design for back idler use
• 1.00 in. belt width / 25.4 mm pulley width
• 2.99 in. outside diameter / 76.0 mm O.D.
• 1.02 in. inside diameter and 17 mm I.D.
• Single mounting hole design
• Meets or exceeds OEM specifications

Fitment Details

• Fits 2006-2007 Audi A3, N/A
• Fits 2006-2007 Audi A3 Quattro, N/A
• Fits 1997-2004 Audi A8 Quattro, N/A
• Fits 2004 Audi Allroad Quattro, N/A
• Fits 2003-2004 Audi RS6, N/A
• Fits 2003 Audi S6, N/A
• Fits 2003 Audi S8, N/A
• Fits 1994-1998 Audi Cabriolet, N/A
• Fits 1990-1994 Audi V8 Quattro, N/A
• Fits 1989-1992 Ford Probe, N/A
• Fits 1989-1990 Chevrolet Corvette, N/A
• Fits 1986-1989 Ford Aerostar, Alternator
• Fits 1985-1989 Ford Ranger, N/A
• Fits 1979-1981 Mercury Capri, N/A
• Fits 1979 Ford Mustang, N/A

What It Helps Address

• Worn or noisy idler pulley bearings
• Belt tracking issues in serpentine drive systems
• Accessory belt squeal caused by pulley wear
• Uneven belt routing from a damaged pulley surface
• Replacement needs on Audi A3, Audi A8 Quattro, Ford Ranger, and Chevrolet Corvette applications

Installation Notes

Verify pulley diameter, belt width, and mounting style before installation. Mounting hardware is not included, so reuse or source the correct hardware for the vehicle. Confirm the pulley position and belt path against the original component, especially on applications marked N/A or Alternator in the fitment data.

For best results, inspect the serpentine belt, tensioner, and adjacent pulleys at the same time. Hayden 5974 is a direct-fit style replacement for listed applications and is suitable for service on vehicles such as the Audi A3 and Ford Ranger when the original pulley matches the published dimensions.

Quality Assurance

Hayden lists this pulley as meeting or exceeding OEM requirements for the specified applications. The part cross-references Monroe Shocks & Struts (e.g., 5688) for the same application.