Four Seasons 45904 Accessory Drive Belt Tensioner Pulley

Accessory Drive Belt Tensioner Pulley

Four Seasons 45904 is a metal accessory drive belt tensioner pulley built as an idler pulley for the back idler belt path. It features a smooth groove, black finish, 3.5625 in. outside diameter, and 1.25 in. pulley width for direct replacement service on select Mitsubishi, Chrysler, and Dodge applications.

Compatible With 1997-2012 Mitsubishi Eclipse, Endeavor, Galant, and Diamante, plus 2001-2005 Chrysler Sebring and Dodge Stratus applications. Four Seasons 45904 is an OE-style replacement pulley that meets or exceeds OEM requirements and is cross-referenced to Dayco 89138 for the same application.

Key Features

• Metal pulley construction for accessory drive belt service
• Smooth groove design for back idler belt routing
• 3.5625 in. outside diameter and 1.25 in. pulley width
• 0.40625 in. inside diameter and 0.399 in. bore diameter
• Single-mount-hole design
• Meets or exceeds OEM specifications
• Black finish

Detailed Description

This Four Seasons pulley is engineered as an accessory drive belt tensioner pulley and idler pulley for vehicles using a back idler belt configuration. The metal pulley body and smooth running surface support stable belt tracking in the accessory drive system, while the listed dimensions help match OE-style fitment requirements. Four Seasons 45904 is a direct replacement choice for service on Mitsubishi Eclipse, Endeavor, Galant, and Diamante models, as well as Chrysler Sebring and Dodge Stratus applications listed in the fitment data.

The Four Seasons Pulley line focuses on replacement components for belt drive service, and this part number 45904 follows that approach with OE-level dimensional accuracy and a single mounting point. This part cross-references Dayco 89138 for the same application.

What It Helps Address

• Noise from a worn or rough idler pulley
• Belt tracking issues in the accessory drive system
• Visible pulley wear, scoring, or surface damage
• Improper belt routing caused by pulley deterioration
• Service replacement for Mitsubishi Eclipse, Galant, Endeavor, and Diamante belt drive systems

Installation Notes and Tips

Verify pulley diameter, width, bore size, and mounting style against the original part before installation. Mounting hardware is not included. Inspect the accessory belt, tensioner assembly, and adjacent pulleys for wear at the same time to help ensure proper belt operation after replacement. Confirm the vehicle application by year, make, and model before ordering Four Seasons 45904.

Quality Assurance

Four Seasons 45904 meets or exceeds OEM requirements for the listed applications. The pulley is built for replacement use in accessory drive belt systems and is specified with OE-style dimensions for accurate service fitment.