Aftermarket Bosch Alternator Clutch Pulley 24-91254

• 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

Vehicle Application

Ford - Europe Car

Galaxy 1900, AFN 1996-1999

Seat - Europe Car

Alhambra 1900, AFN 1996-1999
ALHAMBRA (7V8, 7V9) Eng.AFN, AVG 1.9 TDI 81kw AFN, AVG 1996-2000
Cordoba 1900, AFN AHU 1997-2001
Cordoba AAZ, 1.9 Diesel Turbo 1993-1997
Cordoba AEY, 1.9SDI 1995-1998
Ibiza 1Z, 1.9TDI 1996
Ibiza AAZ, 1.9 Diesel Turbo 1993-1997
Ibiza AEY, 1.9SDI 1995-1998
Ibiza II 1900, 1Z 1996
Ibiza II 1900, AFN AHU 1996-1999
INCA (6K9) Eng.1Y 1.9 D 47kw 1Y 1999-2003
INCA (6K9) Eng.AEY, AYQ 1.9 SDI 47kw AEY, AYQ 1999-2003
Toledo I 1900, 1Z 1995-1996
Toledo I 1900, AFN AHU 1996-1999

Seat LCV - Europe Van

Inca 1900 1999-2003

Volkswagen - Europe Car

CADDY II Box (9K9A) Eng.1Z, AHU, ALH 1.9 TDI 66kw "1Z, AHU, ALH" 1996-2004
CADDY II Box (9K9A) Eng.1Z, AHU, ALH 1.9 TDI 66kw 1Z; AHU; ALH 1996-2004
CADDY II Box (9K9A) Eng.AEY, AYQ 1.9 SDI 47kw "AEY, AYQ" 1995-2004
CADDY II Box (9K9A) Eng.AHB 1.7 SDI 42kw AHB 1996-2000
CADDY II Estate (9K9B) Eng.AEY, AYQ 1.9 SDI 47kw AEY, AYQ 1995-2004
CADDY II Estate (9K9B) Eng.AHB 1.7 SDI 42kw AHB 1996-2000
CADDY II Estate (9K9B) Eng.AHU, ALE, ALH 1.9 TDI 66kw AHU, ALE, ALH 1996-2004
Golf III 1Y, 1.9 Diesel 1996-1997
Golf III AHU, 1.9TDI 1996-1997
Golf III ALE, 1.9TDI 1996-1997
Polo 1900, AFN AHU ALE 1998-1999
Polo Classic AEY, 1.9SDI 1995-1998
Polo Classic AHU, 1.9TDI 1996-1998
Polo Classic AKW, 1.7SDI 1997-1998
Polo Classic ALE, 1.9TDI 1996-1998
Sharan 1900, AFN 1996-1999
Sharan AFN, 1.9TDI 1996-1998

Volkswagen LCV - Europe Truck

Caddy 1900, 1Z AHU ALE 1996-2000
Caddy 1900, AEY 1996-2000

BMW - Europe Car

1 (E81) Eng.N43 B16 A, N45 B16 A 116 i 85kw "N43 B16 A, N45 B16 A" 2007-2011
1 (E81) Eng.N43 B20 A, N46 B20 B, N46 B20 C 120 i 115kw "N43 B20 A, N46 B20 B, N46 B20 C" 2006-2011
1 (E81) Eng.N43 B20 A, N46 B20 B, N46 B20 C 120 i 120kw "N43 B20 A, N46 B20 B, N46 B20 C" 2006-2011
1 (E81) Eng.N46 B20 B 118 i 100kw N46 B20 B 2006-2011
1 (E87) Eng.N43 B16 A, N45 B16 A 116 i 85kw "N43 B16 A, N45 B16 A" 2003-2011
1 (E87) Eng.N43 B20 A, N46 B20 A, N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD 120 i 115kw "N43 B20 A, N46 B20 A, N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD" 2003-2011
1 (E87) Eng.N43 B20 A, N46 B20 B 118 i 100kw "N43 B20 A, N46 B20 B" 2006-2011
1 (E87) Eng.N43 B20 A, N46 B20 B 118 i 105kw "N43 B20 A, N46 B20 B" 2006-2011
1 (E87) Eng.N43 B20 A, N46 B20 B 118 i 95kw "N43 B20 A, N46 B20 B" 2004-2007
1 (E87) Eng.N43 B20 A, N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD 120 i 120kw "N43 B20 A, N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD" 2006-2011
1 (E87) Eng.N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD 120 i 110kw "N46 B20 B, N46 B20 BD, N46 B20 C, N46 B20 CC, N46 B20 CD" 2003-2011
1 Convertible (E88) Eng.N46 B20 B 118 i 100kw N46 B20 B 2008-2013
1 Convertible (E88) Eng.N46 B20 B, N46 B20 C 120 i 115kw "N46 B20 B, N46 B20 C" 2008-2013
1 Coupe (E82) Eng.N46 B20 B 120 i 115kw N46 B20 B 2009-2013
3 (E46) Eng.N42 B20 A, N46 B20 A 318 i 105kw "N42 B20 A, N46 B20 A" 2001-2005
3 (E46) Eng.N45 B16, N45 B16 A 316 i 85kw "N45 B16, N45 B16 A" 2002-2005
3 (E46) Eng.N46 B18 A 316 i 85kw N46 B18 A 2002-2005
3 (E90) Eng.N43 B20 A, N46 B20 B 318 i 100kw "N43 B20 A, N46 B20 B" 2007-2011
3 (E90) Eng.N43 B20 A, N46 B20 B 320 i 115kw "N43 B20 A, N46 B20 B" 2006-2011
3 (E90) Eng.N45 B16, N45 B16 A, N45 B16 TU2 316 i 85kw "N45 B16, N45 B16 A, N45 B16 TU2" 2005-2011
3 (E90) Eng.N45 B20 A 320 si 127kw N45 B20 A 2005-2006
3 (E90) Eng.N46 B20 A, N46 B20 B, N46 B20 C 320 i 110kw "N46 B20 A, N46 B20 B, N46 B20 C" 2005-2007
3 (E90) Eng.N46 B20 B 318 i 95kw N46 B20 B 2004-2007
3 Compact (E46) Eng.316 ti 77kw 2002-2005
3 Compact (E46) Eng.N40 B16 A, N45 B16 A 316 ti 85kw "N40 B16 A, N45 B16 A" 2002-2005
3 Compact (E46) Eng.N42 B20 A, N46 B20 A 318 ti 105kw "N42 B20 A, N46 B20 A" 2001-2004
3 Compact (E46) Eng.N46 B18 A 316 ti 85kw N46 B18 A 2001-2005
3 Convertible (E46) Eng.N42 B20, N46 B20 A 318 Ci 105kw "N42 B20, N46 B20 A" 2001-2007
3 Convertible (E46) Eng.N46 B20 A, N46 B20 B 318 Ci 110kw "N46 B20 A, N46 B20 B" 2005-2007
3 Convertible (E93) Eng.320 i 110kw 2007-2013
3 Convertible (E93) Eng.N43 B20 A, N46 B20 B 320 i 115kw "N43 B20 A, N46 B20 B" 2007-2013
3 Coupe (E46) Eng.N42 B20 A, N46 B20 A 318 Ci 105kw "N42 B20 A, N46 B20 A" 2000-2006
3 Coupe (E46) Eng.N45 B16 A 316 Ci 85kw N45 B16 A 2002-2006
3 Coupe (E46) Eng.N46 B20 A 318 Ci 110kw N46 B20 A 2005-2006
3 Coupe (E92) Eng.N43 B20 A, N46 B20 B 320 i 115kw "N43 B20 A, N46 B20 B" 2007-2013
3 Coupe (E92) Eng.N46 B20 A 320 i 110kw N46 B20 A 2006-2007
3 Touring (E46) Eng.N42 B20 A, N46 B20 A 318 i 105kw "N42 B20 A, N46 B20 A" 2001-2005
3 Touring (E46) Eng.N45 B16, N45 B16 A 316 i 85kw "N45 B16, N45 B16 A" 2002-2005
3 Touring (E46) Eng.N46 B18 A 316 i 85kw N46 B18 A 2002-2005
3 Touring (E91) Eng.N46 B20 A, N46 B20 C 320 i 110kw "N46 B20 A, N46 B20 C" 2005-2012
3 Touring (E91) Eng.N46 B20 B 318 i 95kw N46 B20 B 2006-2007
5 (E60) Eng.N46 B20 B 520 i 115kw N46 B20 B 2006-2009
X1 (E84) Eng.N46 B20 B sDrive 18 i 100kw N46 B20 B 2009-2015
X1 (E84) Eng.N46 B20 B sDrive 18 i 110kw N46 B20 B 2010-2015
X3 (E83) Eng.N46 B20 B 2.0 i 110kw N46 B20 B 2005-2008
X3 (E83) Eng.N46 B20 B xDrive 20 i 110kw N46 B20 B 2008-2011
Z4 (E85) Eng.N46 B20 A, N46 B20 B 2.0 i 110kw "N46 B20 A, N46 B20 B" 2005-2009

Features & Benefits

• Precision aftermarket replacement part

• 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

• Manufactured for dependable long-term operation

• Ideal for alternator rebuilding and repair

• 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:

• 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. 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:

• Bearings

• Brushes

• Brush Holder

• Slip Rings

• Voltage Regulator

• Rectifier

• Rotor

• Stator

• Insulators

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.