Dayco 5070640 Serpentine Belt

Serpentine Belt

Fits: 96-00 BMW 740iL, 96-97 BMW 840Ci, 97-98 BMW 540i, 97-00 BMW 740i, 00-03 BMW M5, 02-03 BMW X5, 10-15 BMW 760Li, 10-16 Rolls-Royce Ghost, 18-20 BMW M5, 14-16 Rolls-Royce Wraith, 20 BMW M8, 20 BMW M8 Gran Coupe

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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 Length64.00
Effective Length1625.60
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-42.7
Minimum Operating Temperature-45
Outside Circumference64.66
Outside Circumference1642.37
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width.96



  • Gates: K070640HD
  • NAPA: 25-070640
  • Bando: 7PK1625
  • CARQUEST: K070640
  • BMW: 11 28 1 742 475
  • General Motors: 15681040
  • BMW:
  • Freshstart: 640K7
  • Gates: K070640
  • CARQUEST: K070640HD
  • Goodyear: 4070640
  • Driveworks: 640K7
  • ACDelco: 7K640
  • BMW: 11 28 7 519 955
  • NAPA: 25-070640HD
  • ContiTech: PK070640
  • Duralast: 640K7
  • Dynacraft: D1102-7353


  • 2010-2015 BMW 760Li - Position: Main Drive
  • 1997-2000 BMW 740i - Position: Main Drive
  • 1997-1998 BMW 540i - Position: Main Drive
  • 1996-1997 BMW 840Ci - Position: Main Drive
  • 2002-2003 BMW X5 - Position: Main Drive
  • 2010-2016 Rolls-Royce Ghost - Position: Main Drive
  • 2000-2003 BMW M5 - Position: Main Drive
  • 2019-2019 BMW M5 - Position: Main Drive
  • 2014-2016 Rolls-Royce Wraith - Position: Main Drive
  • 1996-2000 BMW 740iL - Position: Main Drive
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