HomeBelts and Cooling > Accessory Drive Belt System ComponentsGates K100840HD Serpentine Belt - Air Conditioning
Part #: K100840HD

Gates K100840HD Serpentine Belt - Air Conditioning

FleetRunner Heavy Duty Micro-V Belt, Air Conditioning
⚙️ 6 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦FleetRunner Heavy Duty Micro-V Belt, Air Conditioning
🚗Fitment: Ford, Mustang
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Serpentine Belt for Ford Mustang Vehicles

The Gates FleetRunner Heavy Duty Micro-V Belt K100840HD is engineered to provide durable and consistent performance for Ford Mustang models. Designed with heavy-duty applications in mind, this serpentine belt ensures efficient power transmission and long service life.

  • Constructed from EPDM material for enhanced heat and wear resistance
  • Top width of 1.367 inches (35 mm) for optimal fit and grip
  • Polyester cord material for strength and flexibility
  • Cross section designation K with 10 ribs for smooth operation
  • Effective length of 84.06 inches (2135 mm) to match specific accessory drive requirements
  • Outside circumference of 84.79 inches (2154 mm) for precise fitment
  • OE improved grade type for reliable performance in demanding conditions

About the FleetRunner Heavy Duty Micro-V Belt Line

The FleetRunner Heavy Duty Micro-V Belt line by Gates is designed specifically for commercial and heavy-duty automotive applications. This product line focuses on durability and resistance to wear, heat, and environmental factors, making it suitable for vehicles like the Ford Mustang that require dependable accessory drive components under rigorous conditions.

Product Details and Specifications

The Gates K100840HD serpentine belt features a robust EPDM rubber compound that offers superior resistance to cracking and heat degradation compared to traditional materials. Its polyester cord construction provides tensile strength and flexibility, ensuring consistent power transfer to engine accessories. The belt’s 10-rib design with a K cross section allows for smooth engagement with pulleys, reducing slippage and noise. With an effective length of 2135 mm and an outside circumference of 2154 mm, this belt is tailored to fit Ford Mustang accessory drive systems accurately.

Common Applications and Problem Solving

  • Replacement for worn or cracked serpentine belts in Ford Mustang vehicles
  • Addresses belt slippage and squealing issues caused by stretched or damaged belts
  • Improves accessory drive efficiency in heavy-duty or high-mileage Mustangs
  • Prevents premature belt failure due to heat and wear in demanding driving conditions
  • Supports reliable operation of alternator, power steering, and air conditioning systems

Installation Notes and Tips

Ensure the belt routing matches the vehicle’s accessory drive diagram before installation. Inspect pulleys and tensioners for wear or damage to avoid premature belt failure. Proper tensioning is critical; use a belt tension gauge or follow manufacturer specifications to achieve optimal belt tension. Regularly check the belt for signs of wear or damage during routine maintenance.

Quality Assurance and Warranty

The Gates FleetRunner Heavy Duty Micro-V Belt K100840HD is manufactured to meet or exceed OEM standards for durability and performance. Gates provides quality assurance through rigorous testing and material selection. Warranty coverage details should be confirmed with the product documentation or authorized distributors.

BrandGates
Part NumberK100840HD
PositionFleetRunner Heavy Duty Micro-V Belt, Air Conditioning
MaterialEpdm
Top Width1.367
Top Width35
Cord MaterialPolyester
Cross Section DesignationK
Effective Length2135
Effective Length84.06
Outside Circumference2154
Outside Circumference84.79
TypeAutomotive v-ribbed belt (heavy duty)
Grade TypeOe improved
Rib Quantity10

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2012FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt
2011FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt
2010FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt
2009FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt
2008FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt
2007FordMustang5.4LV8GASAir ConditioningFleetRunner Heavy Duty Micro-V Belt

* 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:

10PK213425-100840HD7R3Z 8620 AK100840HD

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