Dayco 5050437 Poly Rib Serpentine Belt - 5PK1110

The Dayco 5050437 Poly Rib serpentine belt is engineered to deliver exceptional performance and longevity for passenger cars and light-duty trucks. This high-quality accessory drive belt features Dayco's innovative W Profile rib design, representing the most significant advancement in multi-ribbed belt technology in over 35 years.

Key Specifications:

• Industry Number: 5PK1110
• Effective Length: 43.71 inches
• Outside Circumference: 44.36 inches
• Top Width: 0.68 inches
• Number of Ribs: 5
• Belt Material: EPDM (Ethylene Propylene Diene Monomer)
• Reinforcement: Aramid fiber cord
• Thickness: 5/32 inch

Advanced W Profile Technology:

• Unique rib profile engineered to conform to high mileage, worn, or misaligned drives
• W-shaped profile cut into each rib tip provides increased flexibility
• Eliminates belt chirp and noisy belt conditions
• Transverse groove design helps belt run cooler and reduces rib cracking
• Provides flexural stress relief for improved performance in both normal and backside bending

Premium Construction:

• Aramid-reinforced EPDM compounds for superior strength and durability
• Excellent resistance to heat, oil, ozone, and under-hood contaminants
• High modulus, low-stretch polyester tensile member provides superior fatigue resistance
• Specially formulated fiber-reinforced undercord stock improves belt stability

Quality Standards:

• Meets or exceeds SAE J1459 and SAE J2432 specifications
• Manufactured to OEM specifications
• Developed through extensive laboratory and road mileage testing

OEM Cross References: Replaces Nissan 11720-00Q1L, NAPA 25-050438, Duralast 437K5, ACDelco 5K438, Bando 5PK1110, Renault 8200841132, Toyota 90916-02256, Toyota 99365-81110, Gates K050438, CARQUEST K050438, and other OEM part numbers.

Backed by Dayco's century-long reputation for automotive excellence, this serpentine belt is designed to power multiple engine accessories including the alternator, air conditioning compressor, power steering pump, and water pump with reliable, quiet performance mile after mile.