• DIM 1:21mm Belt x 50mm Rib OD x 17mm Bore, M16 Threads
• DIM 2:15mm from hub to center of 1st groove
• DIM A (MM):17
• DIM B (MM):49.3
• DIM C (MM):40.1
• DIM D (MM):14.5
• FEATURE 1:100% New
• GROOVES:6 
• SPECS FOR:Bosch IR/IF Alternators
• SPECS:6-Groove Clutch Pulley
• TYPE:OAP

• Audi, Volkswagen 028-903-119AA, 028-903-119AQ, 028-903-119P, 028-903-165B, Bosch 1 126 601 565, 1 127 011 846, 1126601565, 1127011846, F 00M 991 389, F00M991389, Ford 6M21-10344-AA, 95VW-10344-CA, 95VW-10344-FA, INA Bearing Co 535 0001 10, F-225355, F-225355.03, F-225355.04, F-225355.05, F-225355.06, F-225355.07, F-225355.10, F-225355.11, F-225355.3, F-225355.4, F-225355.5, F-225355.6, F-225355.7, Seat 028903119AA, 028903119P, Valeo 588014, 593537

• BMW - Europe (2000-2007) ** Ford - Europe (1996-1999) ** Seat - Europe (1993-2003) ** Seat LCV - Europe (1999-2003) ** Volkswagen - Europe (1995-2004) ** Volkswagen LCV - Europe (1996-2000)

• 21392, 23249, 23770, 23771

• Audi, Volkswagen 028-903-026G, 028-903-028J, 6K0-903-028, 6K0-903-028X; BMW 12-31-7-516-107, 12-31-7-516-108; Bosch 0 123 310 049, 0 123 320 038, 0 123 515 017; Letrika (Iskra) Tech. AAK5349, AAK5349; Magneton 9-517-182, 9-517-482; Marelli 063535150200; Valeo SG9B050

Features & Benefits

• Genuine OEM replacement part

• Manufactured to original factory specifications

• Designed to match original fit, function, and performance

• Helps reduce belt vibration and accessory drive noise

• Supports smooth alternator operation during engine acceleration and deceleration

• Engineered for dependable long-term reliability

• Ideal for alternator rebuilding and repair

What Does an Alternator Clutch Pulley Do?

An alternator clutch pulley, also known as an overrunning alternator pulley (OAP) or overrunning alternator decoupler (OAD), allows the alternator rotor to continue spinning independently during engine deceleration. This helps reduce belt vibration, minimizes stress on the serpentine belt drive system, and improves overall accessory drive performance.

A properly functioning clutch pulley helps reduce belt noise, improves belt tensioner stability, and protects the alternator and related drive components from excessive shock loads. Replacing a worn or seized clutch pulley with a genuine OEM component helps restore the original operating characteristics intended by the manufacturer and promotes long-term charging system reliability.

Common Signs Replacement Is Needed

Replace the alternator clutch pulley if you notice:

• Chirping or squealing belt noise

• Excessive belt vibration

• Failing or bouncing belt tensioner

• Seized or locked pulley

• Free-spinning pulley in both directions

• Rough or noisy pulley bearing

• Premature serpentine belt wear

• Clutch pulley failure discovered during alternator rebuilding

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Always use the correct clutch pulley removal and installation tools designed for your alternator application. Before installation, inspect the alternator shaft, threads, front bearing, belt tensioner, serpentine belt, and accessory drive components for signs of wear or damage.

Verify that the replacement pulley matches the original OEM pulley design, rotation, thread specifications, and overall dimensions. After installation, ensure the pulley operates smoothly and verify proper belt alignment and tension before returning the alternator to service.

While You're Rebuilding

Inspect other common wear components to help maximize charging system reliability:

• Bearings

• Brushes

• Brush Holder

• Slip Rings

• Rectifier

• Diodes

• Rotor

• Clutch Pulley

• Insulators

Why Buy From RC Auto Electric?

RC Auto Electric specializes in genuine OEM and premium aftermarket alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.

Disclaimer

Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original OEM part, pulley style, thread specifications, dimensions, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.