Dayco 5040450 Serpentine Belt

Part Number
Serpentine Belt

Fits: 85-86 Buick Century, 85 Buick Skylark, 85-86 Chevrolet Celebrity, 85 Chevrolet Citation II, 85-86 Pontiac 6000, 86 Oldsmobile Cutlass Ciera, 88-90 Toyota Pickup, 95-97 Honda Accord

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Designed for high mileage multiple-accessory drivesthe Dayco® “W” profile belt (patent pending) is the most innovative advancement in multi-rib belt design in over 25 years. Developed through extensive laboratory and actual road mileage testing, this unique rib profile has been specifically Dayco® engineered to conform to high mileage, worn or misaligned drives without a sacrifice in quiet, long-lasting performance. The "W" profile cut into the tip of each rib makes the tip more flexible and eliminates belt chirp when the belt enters a worn or misalligned pulley. Constructed with Aramid reinforced EPDM compounds, the Dayco® “W” profile belt delivers more than OE required delivers the solution to troublesome drive problems. Dayco® Poly-Rib® Belts meet or exceed SAE J1459 and SAE J2432 specifications.

BRAND: Dayco




Cross SectionK-Section
Effective Length1145.04
Effective Length45.08
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-42.7
Minimum Operating Temperature-45
Outside Circumference45.74
Outside Circumference1161.80
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width.54



  • NAPA: 25-71146
  • Honda: 56992-P0G-A01
  • Gates: K040450
  • V&W: 450K4
  • Bando: 4PK1145
  • Atlas: 4K0450
  • Goodyear: 4040450
  • Toyota: 91840-11400
  • Freshstart: 450K4
  • NAPA: 25-040450
  • ACDelco: 4K450
  • Honda: 56992-P0G-A02
  • Driveworks: 450K4
  • Duralast: 450K4
  • Atlas: 4450
  • CARQUEST: K040450
  • AutoZone: K4504
  • Toyota: 99364-51140
  • ContiTech: PK040450
  • General Motors: 14091802


  • 1985-1985 Buick Skylark - Position: Alternator and Water Pump
  • 1995-1997 Honda Accord - Position: Power Steering
  • 1985-1986 Buick Century - Position: Alternator and Water Pump
  • 1985-1986 Pontiac 6000 - Position: Alternator and Water Pump
  • 1988-1990 Toyota Pickup - Position: Air Conditioning and Air Pump
  • 1986-1986 Oldsmobile Cutlass Ciera - Position: Alternator and Water Pump
  • 1985-1986 Chevrolet Celebrity - Position: Alternator and Water Pump
  • 1985-1985 Chevrolet Citation II - Position: Alternator and Water Pump
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