Dayco 892009 | Alternator Decoupler Pulley

Part Number
Alternator Decoupler Pulley

Fits: 02-08 Audi A4, 02-08 Audi A4 Quattro, 06-13 Audi A3, 09-13 Audi A3 Quattro, 09 Audi TT, 09-13 Audi TT Quattro, 09-13 Volkswagen CC, 09-16 Volkswagen Eos, 09-13 Volkswagen Tiguan, 10 Audi A6, 10 Volkswagen Jetta, 11-13 Volkswagen GTI, 12-13 Volkswagen Beetle

Special Price $123.49 Regular Price $137.21
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Estimated Ship Date: 1 Business Day or Less
Dayco® OAPs (Overrunning Alternator Pulleys) allow the alternator to ‘freewheel' when the belt speed drops and they are engineered with one-way clutches that allows the rotational inertia of the alternator to “overrun” during any belt deceleration event. Dayco® OAPs, which are designed for long service life, decrease drive belt vibration and reduce belt slippage during rapid acceleration or deceleration, resulting in reduced stress on the drive belt and other accessories as well as increased alternator and drive belt life. Dayco® OAPs are application-specific replacement parts. If a vehicle requires an OAP, the same type of pulley must be installed. Proper tools must be used to remove and install OAPs.

BRAND: Dayco





  • Audi: 06B903119B
  • CARQUEST: 37044P
  • SKF: VKM03116
  • Bosch: F 00M 991 108
  • Bosch: F 00M 147 732
  • NAPA: 37044P
  • Gates: 37103P
  • Bosch: F 00M 991 266
  • INA: 535004110
  • CARQUEST: 37103P
  • NAPA: 37103P
  • Ruville: 55721
  • INA: F 231142
  • Gates: 37044P
  • Audi: 06B903119D
Customer Questions
Will the alternator drain my battery?
No, the alternator is not designed to drain the battery. Instead, it charges the battery while the engine is running. If your battery is being drained, it could be due to a variety of factors, and it's recommended to have your vehicle inspected by a mechanic.
Which alternator system is controlled by the PCM?
The variable voltage alternator system is commonly controlled by the PCM in modern vehicles.
How do alternators work?
Alternators convert mechanical energy from the engine into electrical energy to power the vehicle's electrical system and charge the battery. They consist of a rotor, stator, and voltage regulator, which work together to produce electrical energy that is used to power the vehicle's electrical components and charge the battery.
Which alternator do I need?
To determine which alternator you need, consider your vehicle's make and model, engine size, and electrical system requirements.
Learn About Alternator Repair Cost
Replacing your car's alternator yourself can be an option to save on repair costs. offers a variety of new and remanufactured alternators to fit your needs. However, keep in mind that DIY alternator repair is for those who are comfortable working on cars and have the necessary tools.
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