Hayden 5906 Accessory Drive Belt Idler Pulley

Accessory Drive Belt Idler Pulley for Mitsubishi

The Hayden 5906 is an accessory drive belt idler pulley built for serpentine belt systems that use a smooth back idler design. It is a steel pulley with a black finish and OEM-level dimensions for direct replacement service on select Mitsubishi Eclipse, Galant, Lancer, Montero, and Outlander applications.

Hayden Pulley 5906 is made to meet or exceed OEM requirements and is sized for proper belt tracking in the accessory drive belt system. For buyers searching for a Mitsubishi Eclipse idler pulley or a Mitsubishi Galant serpentine belt idler pulley, this part number provides a direct-fit service option.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Steel construction with black finish
• Smooth groove design for back idler applications
• Outside diameter: 3.5625 in. (90.488 mm)
• Pulley width: 1.18 in. (30 mm)
• Inside diameter: 0.40625 in. / bore diameter: 0.399 in. (10.160 mm)
• Meets or exceeds OEM requirements
• Mount hole quantity: 1
• Mounting hardware not included

Product Details

The Hayden 5906 idler pulley is designed for accessory drive belt routing where a smooth pulley surface is required. Its steel body and OE-style dimensions support consistent belt contact and proper alignment in the serpentine drive system. This part cross-references Dayco 89177 and Gates 36415 for the same application. Hayden 5906 is also listed among interchange references including Dorman - HELP 45906 and other OE-style replacement numbers.

Compatible With Mitsubishi Eclipse, Mitsubishi Galant, Mitsubishi Lancer, Mitsubishi Montero, and Mitsubishi Outlander applications that call for a smooth accessory drive belt idler pulley. Fits 2006-2012 Mitsubishi Eclipse, N/A; Fits 2004-2012 Mitsubishi Galant, N/A; Fits 2002-2006 Mitsubishi Lancer, N/A; Fits 2001-2006 Mitsubishi Montero, N/A; Fits 2003-2006 Mitsubishi Outlander, N/A.

Common Problems This Part Can Address

• Noise from a worn or rough idler pulley bearing
• Belt tracking issues in the serpentine drive system
• Visible pulley wear, wobble, or surface damage
• Accessory drive belt routing concerns on smooth-pulley applications
• Replacement needs during belt system service on Mitsubishi models

Installation Notes and Tips

Verify pulley diameter, width, bore size, and smooth-surface design before installation. This pulley uses one mounting hole and does not include mounting hardware, so reuse or source the correct fastener as needed. Confirm the vehicle requires a smooth back idler pulley for the accessory drive belt system before ordering.

Quality Assurance

Hayden lists this pulley as meeting or exceeding OEM requirements, making it a direct replacement choice for service work on the specified Mitsubishi applications.