Four Seasons 45917 Accessory Drive Belt Idler Pulley

Accessory Drive Belt Idler Pulley for Ram

Restore proper serpentine belt routing with the Four Seasons 45917 accessory drive belt idler pulley. This steel, black-finished pulley is built to OE dimensions and meets or exceeds OEM requirements for direct replacement service on select Ram and Dodge Ram applications.

Four Seasons Pulley line components are built for drivetrain and accessory drive service where correct belt tracking, pulley width, and groove profile matter. The 45917 idler pulley is sized for an 8-groove serpentine belt system and includes mounting hardware for installation.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Steel construction with black finish
• 8-groove pulley profile for proper belt engagement
• Outside diameter: 4.9375 in. (125.413 mm)
• Inside diameter: 0.671875 in. (16.993 mm)
• Pulley width: 1.25 in. (33 mm)
• Meets or exceeds OEM specifications
• Mounting hardware included

Detailed Description

Four Seasons 45917 is an idler pulley for the accessory drive belt system, engineered to maintain correct serpentine belt alignment and smooth belt travel. It uses a steel pulley body with an 8-groove design and a 1.1875 in. belt width specification, making it a direct-fit service part for vehicles that require this OE-style pulley configuration. This part cross-references Gates 36315 for the same application.

Compatible With 2011-2025 Ram 2500, N/A; 2011-2025 Ram 3500, N/A; 2011-2013 Ram 4000, N/A; 2003-2010 Dodge Ram 2500, N/A; and 2003-2010 Dodge Ram 3500, N/A. If you are replacing a worn pulley on a Ram 2500, Ram 3500, or Dodge Ram 2500/Ram 3500 accessory drive system, Four Seasons 45917 provides the correct pulley style and dimensions for the application.

Common Uses

• Corrects belt noise caused by a worn idler pulley
• Restores proper serpentine belt tracking
• Addresses pulley wobble or rough rotation
• Helps resolve belt misalignment in the accessory drive system
• Supports replacement of a damaged or seized pulley on Ram and Dodge Ram trucks

Installation Notes

Verify pulley diameter, groove count, and belt width before installation. Inspect the serpentine belt, tensioner, and adjacent accessory pulleys for wear while servicing the idler pulley. Confirm fitment by year, make, and model before ordering, especially on Ram 2500, Ram 3500, and Dodge Ram 2500/Ram 3500 applications.

Quality Assurance

Four Seasons lists this pulley as meeting or exceeding OEM requirements. The steel construction and OE-style dimensions support consistent fitment and dependable service in the accessory drive belt system.