HomeBelts and Cooling > Accessory Drive Belt System ComponentsDayco 5050565 Serpentine Belt - Air Conditioning and Idler or Main Drive
Part #: 5050565

Dayco 5050565 Serpentine Belt - Air Conditioning and Idler or Main Drive

Air Conditioning and Idler and Main Drive
⚙️ 10 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford, Mercury, and Volkswagen, Cougar, Passat, and Thunderbird
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Durable Serpentine Belt for Ford, Mercury, and Volkswagen Vehicles

The Dayco 5050565 serpentine belt is engineered to provide reliable performance for select Ford, Mercury, and Volkswagen models, including the Cougar, Passat, and Thunderbird. Constructed with EPDM and aramid reinforcement, this belt offers enhanced durability and resistance to wear under various operating conditions.

  • Material: EPDM with aramid fiber reinforcement for strength and longevity
  • Top Width: 0.68 inches ensuring proper fit and tension
  • Effective Length: Approximately 56.5 inches (1435.10 mm) for precise compatibility
  • Outside Circumference: 57.16 inches (1451.87 mm) for accurate routing
  • Rib Quantity: 5 ribs with a straight rib profile for efficient power transmission
  • Cross Section: K-section design optimized for accessory drive systems
  • Operating Temperature Range: -45°C to 212°F (-42.7°C to 100°C) suitable for diverse climates
  • Meets SAE J1459 and SAE J2432 standards for quality and performance

Technical Overview of Dayco 5050565 Serpentine Belt

This serpentine belt features a K-section cross section with five straight ribs, designed to deliver consistent power transfer to accessory components such as the alternator, power steering pump, and air conditioning compressor. The EPDM material combined with aramid reinforcement enhances resistance to heat, ozone, and mechanical stress, extending belt life. The belt’s dimensions, including a top width of 0.68 inches and an outside circumference of 57.16 inches, ensure a precise fit for the accessory drive systems in Ford Cougar, Mercury Cougar, Volkswagen Passat, and Ford Thunderbird models.

Compatible Vehicles and Applications

  • Ford Cougar accessory drive belt replacement
  • Mercury Cougar serpentine belt for accessory systems
  • Volkswagen Passat serpentine belt for engine accessory drive
  • Ford Thunderbird accessory drive belt maintenance

Installation Notes and Tips

When installing the Dayco 5050565 serpentine belt, ensure the belt routing matches the vehicle’s accessory drive diagram. Check the belt tensioner for proper operation and adjust tension as needed to prevent slippage or premature wear. Inspect pulleys and accessory components for alignment and damage before installation to maximize belt life.

Quality Assurance and Standards Compliance

The Dayco 5050565 serpentine belt complies with SAE J1459 and SAE J2432 standards, confirming its suitability for automotive accessory drive applications. Manufactured with EPDM and aramid reinforcement, this belt is designed to withstand operating temperatures from -45°C to 212°F, providing reliable performance in a range of environmental conditions.

BrandDayco
Part Number5050565
MaterialEpdm, aramid reinforced
Top Width.68
ColorBlack
Effective Length1435.10
Effective Length56.50
Outside Circumference1451.87
Outside Circumference57.16
Rib Quantity5
Cross SectionK-section
Maximum Operating Temperature100
Maximum Operating Temperature212
Minimum Operating Temperature-42.7
Minimum Operating Temperature-45
Rib DepthStandard
Rib ProfileStraight rib
StandardsSae j1459, sae j2432

This part fits 10 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2005VolkswagenPassat2.0LL4Main Drive
2004VolkswagenPassat2.0LL4Main Drive
1981FordThunderbird5.0LV8Air Conditioning and Idlerw/FIOD Trans., Two Idlers Used
1981FordThunderbird4.2LV8Air Conditioning and Idlerw/FIOD Trans., Two Idlers Used
1981MercuryCougar5.0LV8Air Conditioning and Idlerw/Automatic Overdrive Trans., Two Idlers
1981MercuryCougar4.2LV8Air Conditioning and Idlerw/Automatic Overdrive Trans., Two Idlers
1980FordThunderbird5.0LV8Air Conditioning and Idlerw/FIOD Trans.
1980FordThunderbird4.2LV8Air Conditioning and Idlerw/FIOD Trans.
1980MercuryCougar5.0LV8Air Conditioning and Idlerw/FIOD Trans.
1980MercuryCougar4.2LV8Air Conditioning and Idlerw/FIOD Trans.

* 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:

5K565

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