HomeBelts and Cooling > Accessory Drive Belt System ComponentsHayden 5051 Accessory Drive Belt Idler Pulley
Part #: 5051

Hayden 5051 Accessory Drive Belt Idler Pulley

Pulley
⚙️ 19 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Pulley
🚗Fitment: Mercedes-Benz, CL600, S600, SL600, S600L, 600SEC, 600SEL, and 600SL
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Overview of Hayden Pulley Accessory Drive Belt Idler Pulley

The Hayden Pulley 5051 is a steel accessory drive belt idler pulley designed for select Mercedes-Benz models. Engineered to meet or exceed OEM specifications, this pulley ensures reliable serpentine belt tension and alignment for vehicles like the Mercedes-Benz 600SEC, 600SEL, and SL600.

  • Constructed from durable steel with a black finish
  • Compatible with serpentine belt systems featuring 8 grooves
  • Outside diameter of 2.5 inches (63.5 mm) and inside diameter of 1.40 inches
  • Width measures 33.5 mm (1.062 inches) for precise belt fitment
  • Designed specifically for Mercedes-Benz 600 series models and CL600
  • Meets or exceeds OEM quality standards
  • Mount hole quantity: 1; mounting hardware not included

Detailed Product Description

The Hayden Pulley 5051 is part of the Pulley brand line, which focuses on high-quality pulley components for accessory drive belt systems. This idler pulley is crafted from steel to provide strength and durability under continuous engine operation. Its black color finish offers corrosion resistance and a professional appearance. The pulley features 8 grooves to accommodate serpentine belts with a width of 1.125 inches (31.75 mm), ensuring proper belt tracking and tension. With an outside diameter of 2.5 inches (63.5 mm) and an inside diameter of 1.40 inches, it fits precisely within the accessory drive system of Mercedes-Benz 600SEC, 600SEL, 600SL, CL600, S600, S600L, and SL600 models.

Common Applications and Issues Addressed

  • Restores proper tension and alignment in serpentine belt systems
  • Eliminates belt slippage and noise caused by worn or damaged pulleys
  • Prevents premature belt wear and potential engine accessory failure
  • Replaces OEM idler pulleys that have become seized or noisy
  • Supports smooth operation of alternator, power steering, and AC compressor belts

Installation Notes and Tips

  • Verify compatibility with your specific Mercedes-Benz model before installation
  • Mounting hardware is not included; reuse existing hardware or source appropriate fasteners
  • Inspect serpentine belt condition during installation and replace if necessary
  • Ensure proper torque specifications are followed to avoid pulley misalignment
  • Check belt tension after installation to confirm correct operation

Quality Assurance and Warranty

The Hayden Pulley 5051 meets or exceeds OEM standards for fit, form, and function, providing reliable performance in demanding automotive environments. Manufactured with precision steel materials, this idler pulley is built to withstand the stresses of accessory drive systems. While specific warranty details are not provided, Hayden products typically adhere to industry quality controls to ensure durability and customer satisfaction.

BrandHayden
Part Number5051
PositionPulley
Belt TypeSerpentine
Belt Width IN1.125
Belt Width MM31.750
Bore Dia. IN0.668
ColorBlack
DescriptionIdler / Tensioner Pulley
Groove Quantity8
I.D. MM7.9375
Inside Diameter1.40
MaterialSteel
Meets / Exceeds OEM?Yes
Mount Hole Qty1
Mounting Hardware?Not Included
O.D. MM63.500
Outside Diameter2.500
Pulley TypeIdler Pulley
Pulley Width IN1.062
Pulley Width MM26.9
StyleIdler / Tensioner Pulley
TypePulley
Width33.5

This part fits 19 vehicles. Search below:

YearMakeModelPositionNotes
1999Mercedes-BenzCL600N/APulley
1999Mercedes-BenzS600N/APulley
1999Mercedes-BenzSL600N/APulley
1998Mercedes-BenzCL600N/APulley
1998Mercedes-BenzS600N/APulley
1998Mercedes-BenzSL600N/APulley
1997Mercedes-BenzS600N/APulley
1997Mercedes-BenzSL600N/APulley
1996Mercedes-BenzS600N/APulley
1996Mercedes-BenzSL600N/APulley
1995Mercedes-BenzS600N/APulley
1995Mercedes-BenzS600LN/APulley
1995Mercedes-BenzSL600N/APulley
1994Mercedes-BenzS600N/APulley
1994Mercedes-BenzSL600N/APulley
1993Mercedes-Benz600SECN/APulley
1993Mercedes-Benz600SELN/APulley
1993Mercedes-Benz600SLN/APulley
1992Mercedes-Benz600SELN/APulley

* 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:

120200470380914505149081505183521089080A89340CWK835210

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