Dayco 5071000 Serpentine Belt - Main Drive
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Dayco

Dayco 5071000 Serpentine Belt - Main Drive

Brand Dayco 5071000
Position Main Drive
Color Black
Cross Section K-Section
Effective Length 100.00
Effective Length 2540.00
Material EPDM, Aramid Reinforced
Maximum Operating Temperature 100
Maximum Operating Temperature 212
Minimum Operating Temperature -45
Minimum Operating Temperature -42.7
Outside Circumference 100.66
Outside Circumference 2556.77
Rib Depth Standard
Rib Profile Straight Rib
Rib Quantity 7
Standards SAE J1459, SAE J2432
Top Width .96
Fits Audi and Volkswagen · 6 vehicles

Aramid reinforced. EPDM construction adds strength and durability for dependable belt performance.

Straight rib profile. Helps maintain smooth, efficient power transfer in the accessory drive system.

SAE J1459, SAE J2432. Built to meet recognized industry standards for belt quality and consistency.

Cross-references Audi 077.903.137AE, Driveworks 1000K7 and Duralast 1000K7 for the same application. See all 3.

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Dayco 5071000 Serpentine Belt for Audi and Volkswagen

The Dayco 5071000 serpentine belt is built for accessory drive applications that demand stable grip, consistent routing, and dependable operation across a wide temperature range. It is a fitment-specific replacement for select Audi A8 Quattro and Volkswagen Phaeton main drive applications.

Key Features

  • EPDM construction with aramid reinforcement for strength and wear resistance
  • 7-rib K-section profile for accessory drive belt system applications
  • Top width: 0.96 in. for proper pulley engagement
  • Effective length: 100.00 in. / 2540.00 mm
  • Outside circumference: 100.66 in. / 2556.77 mm
  • Black finish with straight rib profile
  • Built to SAE J1459 and SAE J2432 standards
  • Operating temperature range: -45°F to 212°F

Detailed Description

Dayco 5071000 is a serpentine belt for the accessory drive belt system, engineered with EPDM and aramid reinforcement to handle heat, flexing, and continuous belt loading. The 7-rib K-section design supports secure pulley contact, while the straight rib profile helps maintain smooth operation in the main drive system. This part number is used in select 2004-2006 Audi A8 Quattro and 2004-2006 Volkswagen Phaeton main drive applications. This part cross-references Audi 077.903.137AE for the same application.

For buyers searching for a 2004-2006 Audi A8 Quattro serpentine belt or a 2004-2006 Volkswagen Phaeton main drive belt, Dayco 5071000 provides a direct replacement option with the listed dimensions and rib count. The part number 5071000 is also commonly referenced in aftermarket catalogs for these vehicle applications.

What This Belt Helps Address

  • Squealing or chirping from a worn accessory drive belt
  • Cracking, glazing, or rib wear on the existing serpentine belt
  • Loss of belt tension or inconsistent pulley tracking
  • Accessory drive noise during engine operation
  • Replacement needs for Audi A8 Quattro and Volkswagen Phaeton main drive service

Installation Notes and Tips

Verify belt length, rib count, and pulley routing against the vehicle application before installation. Inspect idlers, tensioners, and accessory pulleys for wear or misalignment, since those conditions can shorten belt life. Confirm the belt seats fully in each pulley groove and follows the factory routing path for the 2004-2006 Audi A8 Quattro or 2004-2006 Volkswagen Phaeton.

Quality Assurance

Dayco manufactures this belt to SAE J1459 and SAE J2432 standards, with EPDM and aramid reinforcement specified for durability in accessory drive service. The part number 5071000 is built for the listed fitment and dimensions.

Related reading

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2006AudiA8 Quattro4.2LV8Main Drive—
2006VolkswagenPhaeton4.2LV8Main Drive—
2005AudiA8 Quattro4.2LV8Main Drive—
2005VolkswagenPhaeton4.2LV8Main Drive—
2004AudiA8 Quattro——Main Drive—
2004VolkswagenPhaeton4.2LV8Main Drive—
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Audi — 077.903.137AEDriveworks — 1000K7Duralast — 1000K7