HomeBelts and Cooling > Accessory Drive Belt System ComponentsDayco 4PK945EE Serpentine Belt - Air Conditioning
Part #: 4PK945EE

Dayco 4PK945EE Serpentine Belt - Air Conditioning

Supersedes E040363, Air Conditioning
⚙️ 4 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Supersedes E040363, Air Conditioning
🚗Fitment: Ford, Mustang
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Overview of Dayco 4PK945EE Serpentine Belt for Ford Mustang

The Dayco 4PK945EE serpentine belt is engineered for reliable performance in Ford Mustang vehicles. Designed with durable EPDM4 material and a 4-rib K-section profile, this belt ensures consistent accessory drive operation under a wide range of temperatures.

  • Constructed from EPDM4 material for enhanced durability
  • Top width of 0.54 inches with 4 straight ribs
  • Effective length of 945.01 mm (37.205 inches)
  • Cross section: K-section with standard rib depth
  • Operates efficiently between -45°C and 212°F (100°C max)
  • Meets SAE J1459 standards for quality and performance

Detailed Product Description and Brand Line Information

The Dayco 4PK945EE serpentine belt is part of the Supersedes E040363 product line, which focuses on providing direct replacement components that meet or exceed original equipment specifications. This belt’s K-section cross section and four-rib design deliver reliable power transmission to accessory components such as the alternator, power steering pump, and air conditioning compressor. The EPDM4 material offers resistance to heat, ozone, and wear, making it suitable for the demanding conditions under the hood of a Ford Mustang. The belt’s effective length of 945.01 mm ensures proper fit and tension, contributing to smooth engine operation.

Compatible Applications and Common Issues Addressed

  • Compatible with Ford Mustang models requiring a 4-rib serpentine belt
  • Replaces worn or cracked belts causing accessory slippage or noise
  • Resolves issues related to belt stretching or fraying
  • Prevents overheating caused by belt failure in cooling systems
  • Eliminates power loss to engine accessories due to belt degradation

Installation Notes and Tips

When installing the Dayco 4PK945EE serpentine belt, ensure the belt routing matches the vehicle’s accessory drive diagram. Inspect pulleys and tensioners for wear or damage before installation. Proper tension adjustment is critical to prevent premature belt wear or slippage. Use a belt tension gauge if available to verify correct tension. Avoid twisting or forcing the belt during installation to maintain rib alignment and integrity.

Quality Assurance and Warranty

Dayco serpentine belts are manufactured to meet SAE J1459 standards, ensuring consistent quality and durability. The 4PK945EE belt undergoes rigorous testing for heat resistance, flexibility, and tensile strength. While specific warranty details may vary, Dayco products typically come with a limited warranty against defects in material and workmanship, providing confidence in long-term performance for your Ford Mustang.

BrandDayco
Part Number4PK945EE
PositionSupersedes E040363, Air Conditioning
ColorBlack
Cross SectionK-Section
Effective Length37.205
Effective Length945.01
Free Length36.3
Free Length922.020
MaterialEPDM4
Maximum Operating Temperature100
Maximum Operating Temperature212
Minimum Operating Temperature-45
Minimum Operating Temperature-42.7
Outside Circumference0
Rib DepthStandard
Rib ProfileStraight Rib
Rib Quantity4
StandardsSAE J1459
Top Width.54

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2014FordMustang3.7LV6Air ConditioningSelf-tensioning serpentine belt; zip tie needed for installation, refer to package instructions.; Supersedes E040363
2013FordMustang3.7LV6Air ConditioningSelf-tensioning serpentine belt; zip tie needed for installation, refer to package instructions.; Supersedes E040363
2012FordMustang3.7LV6Air ConditioningSelf-tensioning serpentine belt; zip tie needed for installation, refer to package instructions.; Supersedes E040363
2011FordMustang3.7LV6Air ConditioningSelf-tensioning serpentine belt; zip tie needed for installation, refer to package instructions.; Supersedes E040363

* 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:

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