HomeBelts and Cooling > Accessory Drive Belt System ComponentsFour Seasons 45919 Accessory Drive Belt Idler Pulley - Air Conditioning or Power Steering
Part #: 45919

Four Seasons 45919 Accessory Drive Belt Idler Pulley - Air Conditioning or Power Steering

Pulley, Air Conditioning and Power Steering
⚙️ 34 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Pulley, Air Conditioning and Power Steering
🚗Fitment: Cadillac, CTS, SRX, and STS
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Accessory Drive Belt Idler Pulley for Cadillac Vehicles

The Four Seasons Pulley 45919 is a precision-engineered accessory drive belt idler pulley designed specifically for Cadillac CTS, SRX, and STS models. Crafted from durable steel and finished in black, this pulley ensures consistent performance and longevity in your vehicle's serpentine belt system.

Key Features of Four Seasons Pulley 45919

  • Constructed from robust steel material for strength and durability
  • Black finish for corrosion resistance and aesthetic consistency
  • Smooth groove design compatible with serpentine belts
  • Inside diameter of 0.671875 inches (17 mm) and outside diameter of 2.75 inches (69.85 mm)
  • Width measures 1.18 inches (30 mm), suitable for 1.125 inch (28.575 mm) wide belts
  • Back idler pulley type designed for optimal belt tension and routing
  • Includes mounting hardware for straightforward installation
  • Meets or exceeds OEM specifications for reliable fit and function

Detailed Description of the Four Seasons Pulley 45919

This accessory drive belt idler pulley from Four Seasons is part of the Pulley product line, which focuses on delivering components that maintain proper belt tension and alignment in automotive accessory drive systems. The Pulley line emphasizes durability and precision fitment, making it a suitable replacement part for maintaining the performance of your vehicle’s serpentine belt system.

The 45919 pulley features a smooth groove design, ideal for serpentine belt applications found in Cadillac CTS, SRX, and STS models. Its steel construction provides the necessary strength to withstand the stresses of continuous operation, while the black finish helps resist corrosion. The pulley’s dimensions, including a 0.671875 inch inside diameter and 2.75 inch outside diameter, ensure compatibility with the specified belt widths and vehicle requirements.

Common Applications and Issues Addressed

  • Restores proper belt tension and alignment in the accessory drive system
  • Eliminates belt slippage caused by worn or damaged idler pulleys
  • Prevents premature belt wear and noise from misaligned pulleys
  • Replaces faulty or seized pulleys that can cause accessory drive failure
  • Supports smooth operation of engine accessories such as alternator and power steering pump

Installation Notes and Tips

When installing the Four Seasons Pulley 45919, ensure the serpentine belt is properly routed according to the vehicle’s service manual. Verify that the pulley spins freely without resistance or noise before final assembly. Use the included mounting hardware to secure the pulley firmly, and double-check belt tension after installation to prevent premature wear.

Quality Assurance and Warranty

The Four Seasons Pulley 45919 meets or exceeds OEM standards, providing reliable performance for Cadillac CTS, SRX, and STS vehicles. This part is manufactured with quality materials and precision engineering to ensure durability and fitment accuracy. Please refer to Four Seasons’ warranty policy for specific coverage details.

BrandFour Seasons
Part Number45919
PositionPulley, Air Conditioning and Power Steering
MaterialSteel
ColorBlack
Inside Diameter0.671875
Groove QuantitySmooth
Width30
Outside Diameter2.750
Belt TypeSerpentine
Belt Width IN1.125
Belt Width MM28.575
Bore Dia. IN.67
DescriptionIdler / tensioner pulley
I.D. MM17
Meets / Exceeds OEM?Yes
Mount Hole Qty1
Mounting Hardware?Included
O.D. MM69.850
Pulley TypeBack idler
Pulley Width IN1.18
Pulley Width MM28.7
StyleIdler / tensioner pulley
TypePulley

This part fits 34 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011CadillacSTSAir ConditioningPulley
2011CadillacSTSPower SteeringPulley
2010CadillacSTS3.6LV6Air ConditioningPulley
2010CadillacSTS3.6LV6Power SteeringPulley
2009CadillacCTS3.6LV6Air ConditioningPulley
2009CadillacCTS3.6LV6Power SteeringPulley
2009CadillacSRX3.6LV6Air ConditioningPulley
2009CadillacSRX3.6LV6Power SteeringPulley
2009CadillacSTS3.6LV6Air ConditioningPulley
2009CadillacSTS3.6LV6Power SteeringPulley
2008CadillacCTSAir ConditioningPulley
2008CadillacCTSPower SteeringPulley
2008CadillacSTS3.6LV6Air ConditioningPulley
2008CadillacSTS3.6LV6Power SteeringPulley
2007CadillacCTS2.8LV6Air ConditioningPulley
2007CadillacCTS2.8LV6Power SteeringPulley
2007CadillacCTS3.6LV6Air ConditioningPulley
2007CadillacCTS3.6LV6Power SteeringPulley
2007CadillacSTS3.6LV6Air ConditioningPulley
2007CadillacSTS3.6LV6Power SteeringPulley
2006CadillacCTS2.8LV6Air ConditioningPulley
2006CadillacCTS2.8LV6Power SteeringPulley
2006CadillacCTS3.6LV6Air ConditioningPulley
2006CadillacCTS3.6LV6Power SteeringPulley
2006CadillacSTS3.6LV6Air ConditioningPulley
2006CadillacSTS3.6LV6Power SteeringPulley
2005CadillacCTS2.8LV6Air ConditioningPulley
2005CadillacCTS2.8LV6Power SteeringPulley
2005CadillacCTS3.6LV6Air ConditioningPulley
2005CadillacCTS3.6LV6Power SteeringPulley
2005CadillacSTS3.6LV6Air ConditioningPulley
2005CadillacSTS3.6LV6Power SteeringPulley
2004CadillacCTS3.6LV6Air ConditioningPulley
2004CadillacCTS3.6LV6Power SteeringPulley

* 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:

1256689336275451584591950027591983591989132

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