HomeBelts and Cooling > Accessory Drive Belt System ComponentsHayden 5919 Accessory Drive Belt Idler Pulley - Air Conditioning or Power Steering
Part #: 5919

Hayden 5919 Accessory Drive Belt Idler Pulley - Air Conditioning or Power Steering

Pulley, Air Conditioning
34 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$25.80Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Pulley, Air Conditioning
Fitment: Cadillac, STS, CTS, and SRX
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Hayden Pulley Accessory Drive Belt Idler Pulley

The Hayden Pulley 5919 is a steel accessory drive belt idler pulley designed for select Cadillac models including CTS, SRX, and STS. Engineered to meet or exceed OEM specifications, this pulley ensures reliable serpentine belt tension and smooth operation in your vehicle's accessory drive system.

  • Constructed from durable steel with a black finish
  • Compatible with serpentine belt systems, belt width 1.125 inches (28.575 mm)
  • Outside diameter of 2.75 inches (69.85 mm) and inside diameter of 0.671875 inches (17 mm)
  • Smooth groove design for optimal belt contact
  • Includes mounting hardware for straightforward installation
  • Designed as a back idler pulley with a single mounting hole

Detailed Product Description

The Hayden Pulley 5919 is part of the Pulley product line, which focuses on precision-engineered components for accessory drive belt systems. This idler pulley is crafted from steel to provide strength and durability under continuous engine operation. Its smooth groove design supports serpentine belts with a width of 1.125 inches, ensuring consistent belt tracking and tension. The pulley’s dimensions, including a 2.75-inch outside diameter and a 0.671875-inch inside diameter, are tailored to fit specific Cadillac models such as the CTS, SRX, and STS. The black finish adds corrosion resistance, extending the component’s service life.

Applications and Problem Resolution

  • Maintains proper tension on serpentine belts to prevent slippage
  • Reduces belt noise caused by misalignment or wear
  • Prevents premature belt wear by ensuring smooth rotation
  • Replaces worn or damaged idler pulleys in Cadillac CTS, SRX, and STS models
  • Supports accessory components like alternators and power steering pumps by stabilizing belt routing

Installation Notes and Tips

  • Includes mounting hardware for ease of installation
  • Verify belt width compatibility (1.125 inches) before installation
  • Ensure proper alignment with existing belt routing to avoid premature wear
  • Inspect serpentine belt condition during installation and replace if necessary
  • Torque mounting bolt to manufacturer specifications to secure pulley

Quality Assurance and Warranty

The Hayden Pulley 5919 meets or exceeds OEM standards for fit, form, and function, providing reliable performance in Cadillac CTS, SRX, and STS vehicles. Manufactured with high-quality steel and precision engineering, this idler pulley is backed by Hayden’s commitment to quality. Please refer to the product packaging or manufacturer documentation for specific warranty details.

BrandHayden
Part Number5919
PositionPulley, Air Conditioning
Belt TypeSerpentine
Belt Width IN1.125
Belt Width MM28.575
Bore Dia. IN.67
ColorBlack
DescriptionIdler / Tensioner Pulley
Groove QuantitySmooth
I.D. MM17
Inside Diameter0.671875
MaterialSteel
Meets / Exceeds OEM?Yes
Mount Hole Qty1
Mounting Hardware?Included
O.D. MM69.850
Outside Diameter2.750
Pulley TypeBack Idler
Pulley Width IN1.18
Pulley Width MM28.7
StyleIdler / Tensioner Pulley
TypePulley
Width30

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.