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The alternator pulley is a critical component of your vehicle's charging system, responsible for transferring rotational energy from the engine to the alternator. A worn or improperly sized pulley can lead to undercharging, overcharging, or premature failure of the alternator and other belt-driven accessories. Selecting the correct replacement ensures optimal performance and longevity of your vehicle's electrical system.
[Vehicle Fitment-1]: Compatible with Audi A3 2006-2008 L4 2.0L, A3 2010-2013 L4 2.0L, TT 2000-2006 L4 1.8L, TT 2008-2009 L4 2.0L, A3 Quattro 2006-2008 V6 3.2L, TT Quattro 2000-2006 L4 1.8L, TT Quattro 2011-2014 L4 2.0L, TT Quattro 2004-2006 V6 3.2L...
[Vehicle Fitment-2]: Compatible with Volkswagen Beetle 2000-2005 L4 1.8L, Beetle 1998-2006 L4 1.9L, Beetle 1998-2005 L4 2.0L, Beetle 2013-2015 L4 2.0L, Beetle 2008-2010 L5 2.5L, fit for Jetta 2005 L4 1.8L, fit for Jetta 1999-2006 L4 1.9L, fit for Jetta...
[Specifications]: ① Pulley Groove Quantity: 6; ② Rotation: Clockwise; ③ Belt Pulley Diameter: 55.8 mm; ④ Belt Pulley Width: 41.15 mm; ⑤ Thread Size: M16x1.5; ⑥ Bore Diameter: 17 mm
[Quality Construction]: The A-Premium alternator freewheel clutch adopts 45# steel and precision manufacturing processes for maximum performance, reducing wear and tear while minimizing noise and vibration
[Attention]: To prevent incorrect purchases, please confirm whether you require only the alternator pulley or the complete alternator, and installation must be performed using professional tools
Condition: New; Rotation: BI; Pulley Class: V2; Pulley Belt Width: 13mm; Pulley OD: 76mm; Shaft OD: 22.23mm; Mounting Hardware Included: No; Number of Pieces: 1; Country of Origin: CN; Notes: Machined pulley cut from cold rolled steel
Machined Pulley Cut From Cold Rolled Steel - Engineered to Meet or Exceed OEM Specifications - All Items Tested for Reliability, Durability and Performance
See Product Description for Additional Specifications
[Specifications]: ① Pulley Groove Quantity: 6; ② Rotation: Clockwise; ③ Belt Pulley Diameter: 65.5 mm; ④ Belt Pulley Width: 53.2 mm; ⑤ Thread Size: 10.4; ⑥ Bore Diameter: 17 mm
[Quality Construction]: The A-Premium alternator freewheel clutch adopts 45# steel and precision manufacturing processes for maximum performance, reducing wear and tear while minimizing noise and vibration
[Attention]: To prevent incorrect purchases, please confirm whether you require only the alternator pulley or the complete alternator, and installation must be performed using professional tools
Fitment: for Lexus Car ES350 V6 3.5L 3456cc 2007-2018,for Lexus Car GS300 V6 3.0L 2994cc 2006,for Lexus Car GS350 V6 3.5L 3456cc 2007-2015,for Lexus Car IS250 V6 2.5L 2499cc 2006-2015,for Lexus Car IS300 V6 3.5L 3456cc 2016-2018,for Lexus Car IS350 V...
OE Number:274150W131
They are made of metal materials to provide good performance and reliability. The Accessory Drive Belt Idler Pulley is durable and has high wear resistance
It can change the bending direction of the belt, prevent the belt from shaking, making the belt better contact with another pulley and not fall off. Please confirm your car model of the part before purchasing to avoid buying the wrong one
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Alternator Pulleys
Comparison Tips
Material: Steel offers durability, while aluminum is lighter.
Pulley Type: Match the type (serpentine, V-belt, clutch) to your vehicle's system.
Rib Count and Spacing: Essential for serpentine belts to ensure proper grip.
Shaft Diameter: Must precisely match the alternator shaft.
Clutch Mechanism: Consider if your vehicle benefits from a decoupler.
Frequently Asked Questions
What does an alternator pulley do?
The alternator pulley is connected to the engine's crankshaft via a belt. It spins the alternator's rotor, which in turn generates electricity to charge the battery and power the vehicle's electrical systems.
How do I know if my alternator pulley needs replacing?
Common signs include a persistent squealing noise from the belt area, a charging system warning light on your dashboard, or visible damage to the pulley itself, such as cracks or excessively worn ribs.
Can I use a pulley from a different vehicle model?
Generally, no. Alternator pulleys are designed with specific diameters, rib configurations, and shaft sizes to match particular alternator models and vehicle applications. Using an incompatible pulley can cause damage.
What is the difference between a standard pulley and a clutch pulley?
A standard pulley spins at the same speed as the engine's crankshaft. A clutch pulley (or decoupler) allows the pulley to briefly spin faster or slower than the engine, reducing stress on the belt and alternator, especially during engine deceleration.
Does replacing the pulley require special tools?
Yes, replacing an alternator pulley typically requires specialized tools such as a pulley puller and installer kit to safely remove the old pulley and install the new one without damaging the alternator shaft.
Should I replace the belt when replacing the pulley?
It is highly recommended to replace the serpentine belt whenever you replace the alternator pulley. The old belt may have conformed to the worn pulley, and a new pulley can cause the old belt to slip or wear out prematurely.
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