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Specifications
- DIM 1:18mm Belt x 56mm Rib OD x 17mm Bore, M16 Threads
- DIM 2:5.5mm from hub to center of 1st groove
- DIM A (MM):17
- DIM B (MM):55.87
- DIM C (MM):35
- DIM D (MM):5
- FEATURE 1:100% New
- GROOVES:5
- SPECS FOR:Bosch IR/IF Alternators
- SPECS:5-Groove Clutch Pulley
- TYPE:OAP
USED ON
- Audi (1997-1999) ** Volkswagen (1998-2005)
Replaces
- Audi, Volkswagen 022 903 119 B, 022 903 119 D, 028 903 119 AC, 038 903 119 J, 038 903 119 M, Bosch F 00M 147 724, F 00M 991 045, F 00M 991 378, INA Bearing Co 535 0005 10, F-225653.06, F-225653.07, F-225653.10, F-225653.11, F-552699, F-552699.XX, Lucas LOPA0011, Valeo 588008
LESTER NUMBERS
- 11207, 11208, 11209, 11210, 11212, 23320, 23323
UNIT NUMBERS
- Audi, Volkswagen 028-903-018-K, 028-903-018K, 028-903-029-D, 028-903-029-E, 028-903-029-R, 028-903-029-RX, 028-903-029-T, 028-903-029-TX, 028-903-029A, 028-903-029B, 028-903-029D, 028-903-029E, 028-903-029N, 028-903-029NX, 028-903-029Q, 028-903-029QX, 028-903-029R, 028-903-029RX, 028-903-029S, 028-903-029SX, 028-903-029T, 028-903-029TX, 028-903-031, 028-903-031-A, 028-903-031-AX, 028-903-031A, 028-903-031AX, 06B-903-016-AD, 06B-903-016-E, 06B-903-016AD, 06B-903-016E, 06B-903-018-EX, 06B-903-018EX; Bosch 0 124 315 011, 0 124 325 018, 0 124 325 049, 0 124 515 026, 0 124 515 083, 0 124 515 197, 0 124 525 010, 0 124 525 089, 0 124 615 021; Ford 1757736, E6M2110346CA, RE6M2110346CA; Letrika (Iskra) Tech. AAN5329, AAN5329; Magneton 9-517-215; Marelli 063533250180, 063533250490; Valeo SG12B010, SG12B012, SG12B049, SG12B074, SG14B011, SG9B017, SG9B04
Features & Benefits
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Precision aftermarket replacement part
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Designed to match original fit, function, and performance
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Helps reduce belt vibration and accessory drive noise
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Supports smooth alternator operation during engine acceleration and deceleration
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Manufactured for dependable long-term operation
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Ideal for alternator rebuilding and repair
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Cross-referenced to OEM and aftermarket part numbers
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 is an important step in restoring proper belt system operation and extending the service life of the alternator.
Common Signs Replacement Is Needed
Replace the alternator clutch pulley if you notice:
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Chirping or squealing belt noise
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Excessive belt vibration
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Failing or bouncing belt tensioner
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Seized or locked pulley
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Free-spinning pulley in both directions
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Rough or noisy pulley bearing
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Premature serpentine belt wear
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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. Inspect the alternator shaft, threads, front bearing, belt tensioner, serpentine belt, and accessory drive components for signs of wear or damage before installation.
Verify the replacement pulley matches the original 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:
Why Buy From RC Auto Electric?
RC Auto Electric specializes in 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 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.
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