Hayden 5940 Accessory Drive Belt Idler Pulley - Air Conditioning, Air Conditioning Bracket or Alternator and Power Steering

Accessory Drive Belt Idler Pulley for Serpentine Systems

The Hayden 5940 is an accessory drive belt idler pulley built for serpentine belt routing in select Ford, Mazda, Mercury, and Nissan applications. It uses a steel construction with a black finish and a 4-groove design to match the belt path and pulley profile required by the vehicle.

Fits 1993-2002 Mercury Villager, Air Conditioning; Fits 1993-2002 Nissan Quest, Air Conditioning Bracket; Fits 1998-2001 Nissan Altima, Air Conditioning; Fits 1998-2001 Nissan Altima, Alternator and Power Steering; Fits 1994-1997 Ford Aspire, Factory Air; Fits 1988-1989 Mazda 323.

Key Features

• Hayden Pulley line accessory drive belt idler pulley
• Steel construction with black finish
• 4-groove pulley for serpentine belt systems
• 3.125 in. outside diameter and 17.5 mm pulley width
• 17 mm bore diameter with single mounting hole
• Meets or exceeds OEM requirements
• Direct replacement style for idler / tensioner pulley applications

Detailed Description

The Hayden 5940 idler pulley is specified for accessory drive belt systems where the pulley must maintain belt routing and alignment under engine load. Its steel body and 79.375 mm outside diameter support consistent belt tracking in serpentine setups, while the 17.463 mm belt width and 4-groove profile match the listed applications. This part cross-references Gates 38044 and Dayco 89049 for the same application. Common search terms for this part include Nissan Altima air conditioning idler pulley, Mercury Villager accessory drive belt pulley, and Ford Aspire factory air pulley replacement. The Hayden 5940 is also a relevant search match for Nissan Quest air conditioning bracket pulley and Mazda 323 serpentine belt idler pulley applications.

What It Helps Address

• Belt noise caused by a worn or rough idler pulley bearing surface
• Serpentine belt misalignment from pulley wear or damage
• Accessory drive belt tracking issues in A/C, alternator, or power steering routing
• Visible pulley wobble, scoring, or surface wear
• Loss of proper belt tension path in the accessory drive system

Installation Notes and Tips

Verify pulley diameter, groove count, bore size, and belt width against the original part before installation. Mounting hardware is not included, so reuse or source the correct fastener as needed for the vehicle. Inspect the serpentine belt, tensioner, and adjacent pulleys at the same time to confirm the full drive system is in serviceable condition. For Nissan Altima, Mercury Villager, and other listed applications, confirm the pulley position and bracket style match the original setup.

Quality Assurance

The Hayden 5940 is listed as meeting or exceeding OEM requirements and is part of Hayden’s Pulley line for accessory drive belt system components. It is built for direct-fit replacement use in the confirmed applications shown above.