Hayden 5002 Accessory Drive Belt Idler Pulley - Air Conditioning Bracket

Hayden 5002 Idler Pulley Overview

The Hayden 5002 accessory drive belt idler pulley is a steel serpentine pulley built for accessory drive belt system service. It is a direct-fit style replacement for applications using a 5-groove, 0.750-inch belt width profile and a 3.125-inch outside diameter.

Compatible With 1989-1998 Nissan 240SX, Air Conditioning Bracket; 1991-1993 Nissan NX, Air Conditioning Bracket; 1996-2000 Nissan Pathfinder, Air Conditioning Bracket; and 1997-1999 INFINITI QX4, Air Conditioning Bracket. The Hayden 5002 is also a cross-reference for Dayco 89511 and Gates 36113 for the same application.

Key Features

• Steel pulley construction with a black finish
• Idler / tensioner pulley style for serpentine belt systems
• 5-groove design for proper belt tracking
• 3.125-inch outside diameter and 0.94-inch pulley width
• 0.46875-inch inside diameter / 11.906 mm bore diameter
• Meets or exceeds OEM requirements
• Single mount hole design
• Mounting hardware not included

Detailed Description

The Hayden Pulley line focuses on replacement accessory drive components for belt-driven engine accessories. Part number 5002 is an idler / tensioner pulley used in serpentine belt routing where stable belt alignment and smooth rotation are required. Its steel construction and OE-style dimensions support consistent fitment in Nissan and INFINITI air conditioning bracket applications, including the Nissan 240SX, Nissan NX, Nissan Pathfinder, and INFINITI QX4.

With a 5-groove profile, 79.375 mm outside diameter, and 23.8 mm pulley width, this pulley matches the dimensional requirements of the original belt path. It is a practical replacement when servicing worn, noisy, or damaged accessory drive belt system components. Hayden 5002 is also listed as an interchange for Four Seasons 45002.

Common Problems This Part Can Address

• Squealing or chirping from a worn idler pulley
• Belt tracking issues caused by pulley wear
• Rough pulley rotation or bearing noise
• Accessory drive belt vibration in serpentine systems
• Loss of proper belt tension path at the air conditioning bracket

Installation Notes and Tips

Verify pulley diameter, groove count, bore size, and mounting location before installation. This part is used at the air conditioning bracket on the listed Nissan and INFINITI applications, so confirm belt routing and bracket alignment during service. Inspect the serpentine belt, tensioner, and adjacent pulleys at the same time to avoid repeat repairs. Mounting hardware is not included.

Quality Assurance

The Hayden 5002 is specified as meeting or exceeding OEM requirements for the listed applications. Its steel construction and OE-style dimensions support dependable replacement service in accessory drive belt system repairs.