HomeBelts and Cooling > Accessory Drive Belt System ComponentsFour Seasons 45906 Accessory Drive Belt Idler Pulley
Part #: 45906

Four Seasons 45906 Accessory Drive Belt Idler Pulley

Pulley
⚙️ 31 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Pulley
🚗Fitment: Mitsubishi, Eclipse, Galant, Lancer, Montero, and Outlander
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Reliable Accessory Drive Belt Idler Pulley for Mitsubishi Vehicles

The Four Seasons Pulley 45906 is a precision-engineered accessory drive belt idler pulley designed for select Mitsubishi models including Eclipse, Galant, Lancer, Montero, and Outlander. Crafted from durable steel with a smooth groove design, this pulley ensures consistent serpentine belt tension and alignment for optimal engine performance.

  • Constructed from high-strength steel for durability
  • Black finish with a smooth groove for serpentine belts
  • Outside diameter: 3.5625 inches (90.488 mm)
  • Inside diameter: 0.40625 inches (10.160 mm)
  • Width: 1.18 inches (30 mm)
  • Compatible with serpentine belt width of 1.1875 inches (28.575 mm)
  • Back idler pulley type with single mount hole (mounting hardware not included)
  • Meets or exceeds OEM specifications for reliable fit and function

Four Seasons Pulley Product Line Overview

The Four Seasons Pulley line focuses on delivering durable and precise accessory drive components that meet or exceed original equipment manufacturer standards. This product line emphasizes quality materials and exact fitment to maintain proper belt tension and reduce wear on belt-driven accessories. The 45906 idler pulley is part of this line, engineered specifically for Mitsubishi vehicles to ensure consistent performance and longevity.

Detailed Product Description

This accessory drive belt idler pulley features a steel construction with a black finish, providing strength and corrosion resistance. The smooth groove design is optimized for serpentine belts, helping to maintain proper belt tracking and tension. With an outside diameter of 3.5625 inches and a width of 1.18 inches, it fits serpentine belts with a width of approximately 1.1875 inches. The pulley’s inside diameter measures 0.40625 inches, and it includes a single mounting hole for secure installation. This back idler pulley is designed to meet or exceed OEM specifications, ensuring compatibility and reliable operation in Mitsubishi Eclipse, Galant, Lancer, Montero, and Outlander models.

Common Applications and Issues Addressed

  • Restores proper serpentine belt tension and alignment
  • Eliminates belt slippage and squealing noises
  • Prevents premature belt wear and damage
  • Reduces risk of accessory drive system failure
  • Replaces worn or damaged idler pulleys in Mitsubishi vehicles

Installation Notes and Tips

Installation requires removal of the serpentine belt and securing the pulley using the single mount hole. Note that mounting hardware is not included and should be reused or replaced as necessary. Ensure the belt width matches the pulley specifications (approximately 1.1875 inches) for proper fit. Verify alignment with other accessory drive components during installation to prevent belt misalignment or premature wear.

Quality Assurance and Warranty

The Four Seasons Pulley 45906 is manufactured to meet or exceed OEM standards, providing reliable performance and durability. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty against defects in materials and workmanship. This ensures confidence in the product’s quality and fitment for Mitsubishi Eclipse, Galant, Lancer, Montero, and Outlander vehicles.

BrandFour Seasons
Part Number45906
PositionPulley
Belt TypeSerpentine
Belt Width IN1.1875
Belt Width MM28.575
Bore Dia. IN.399
ColorBlack
DescriptionIdler Pulley
Groove QuantitySmooth
I.D. MM10.160
Inside Diameter0.40625
MaterialSteel
Meets / Exceeds OEM?Yes
Mount Hole Qty1
Mounting Hardware?Not Included
O.D. MM90.488
Outside Diameter3.5625
Pulley TypeBack Idler
Pulley Width IN1.18
Pulley Width MM30
StyleIdler Pulley
TypePulley
Width30

This part fits 31 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2012MitsubishiEclipse2.4LL4N/APulley
2012MitsubishiGalantN/APulley
2011MitsubishiEclipse2.4LL4N/APulley
2011MitsubishiGalantN/APulley
2010MitsubishiEclipse2.4LL4N/APulley
2010MitsubishiGalantN/APulley
2009MitsubishiEclipse2.4LL4N/APulley
2009MitsubishiGalant2.4LL4N/APulley
2008MitsubishiEclipse2.4LL4N/APulley
2008MitsubishiGalant2.4LL4N/APulley
2007MitsubishiEclipse2.4LL4N/APulley
2007MitsubishiGalant2.4LL4N/APulley
2006MitsubishiEclipse2.4LL4N/APulley
2006MitsubishiGalant2.4LL4N/APulley
2006MitsubishiLancerN/APulley
2006MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2006MitsubishiOutlanderN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2005MitsubishiGalant2.4LL4N/APulley
2005MitsubishiLancerN/APulley
2005MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2005MitsubishiOutlanderN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2004MitsubishiGalant2.4LL4N/APulley
2004MitsubishiLancerN/APulley
2004MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2004MitsubishiOutlanderN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2003MitsubishiLancerN/APulley
2003MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2003MitsubishiOutlanderN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2002MitsubishiLancerN/APulley
2002MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley
2001MitsubishiMonteroN/ASmooth pulley for accessory drive belt tensioner.; Pulley

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

3641545906590683590689177A79779MD327654

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.