Alternator Overunner Pulley Bmw E87,E46 ,E90,E61 N42B20,N46B20,N52B30 (EG10025)

Alternator Freewheel Clutch for BMW / MINI – EG10025

This alternator freewheel clutch is a direct replacement part for the vehicle applications listed below. 6 grooves, width 38,3 mm, diameter 49,0/17,0 mm. This part requires special tools for mounting — observe service information. Confirm compatibility by matching OEM reference numbers, engine/chassis details, and model year. VIN check is recommended where variants exist.

Key Details

SKU

EG10025

Component

Alternator freewheel clutch

OEM References

• 12 31 7 516 105 (BMW)
• 12 31 7 516 723 (BMW)
• 12 31 7 516 724 (BMW)
• 12 31 7 521 178 (BMW)
• 12 31 7 521 382 (BMW)
• 12 31 7 521 385 (BMW)
• 12 31 7 521 491 (BMW)
• 12 31 7 525 376 (BMW)
• 12 31 7 532 271 (BMW)
• 12 31 7 532 965 (BMW)
• 12 31 7 532 967 (BMW)
• 12 31 7 532 968 (BMW)
• 12 31 7 516 105 (MINI)
• 12 31 7 516 723 (MINI)
• 12 31 7 516 724 (MINI)
• 12 31 7 521 178 (MINI)
• 12 31 7 521 382 (MINI)
• 12 31 7 521 385 (MINI)
• 12 31 7 521 491 (MINI)
• 12 31 7 525 376 (MINI)
• 12 31 7 532 271 (MINI)
• 12 31 7 532 965 (MINI)
• 12 31 7 532 967 (MINI)
• 12 31 7 532 968 (MINI)

Primary Fitment

BMW 118i [E87] N46B20 (2005–2007)

Included

Alternator freewheel clutch

Specs

6 grooves; distance to first groove 11,6 mm; width 38,3 mm; diameter 49,0/17,0 mm; requires special tools for mounting

Key Benefits

• OEM reference numbers listed for cross-checking before ordering
• 6-groove pulley specification provided to match the alternator drive setup
• Dimensions supplied to help confirm compatibility where variations exist
• Service note: requires special tools for mounting (observe service information)

OEM Reference Numbers

• BMW: 12 31 7 516 105; 12 31 7 516 723; 12 31 7 516 724; 12 31 7 521 178; 12 31 7 521 382; 12 31 7 521 385; 12 31 7 521 491; 12 31 7 525 376; 12 31 7 532 271; 12 31 7 532 965; 12 31 7 532 967; 12 31 7 532 968
• MINI: 12 31 7 516 105; 12 31 7 516 723; 12 31 7 516 724; 12 31 7 521 178; 12 31 7 521 382; 12 31 7 521 385; 12 31 7 521 491; 12 31 7 525 376; 12 31 7 532 271; 12 31 7 532 965; 12 31 7 532 967; 12 31 7 532 968

Product Specifications

Specification	Value
Number of grooves	6
Distance to first groove [mm]	11,6
Width [mm]	38,3 mm
Diameter 1 / 2 [mm]	49,0/17,0 mm
For manufacturer number	F-238005.XX; F-230329.XX
Supplementary info	Requires special tools for mounting; Observe service information

Vehicle Fitment

• BMW – 118i [E87] N46B20 (2005–2007)
• BMW – 120i [E87] N46B20 (2005–2007)
• BMW – 120i [E87] N46B20B,C (2007–2011)
• BMW – 130i [E87] N52B30 (2006–2011)
• BMW – 318i [E46] N42B20 (2001–2005)
• BMW – 318Ti [E46] N42B20 (2001–2005)
• BMW – 320D [E46] M47D20 (2000–2005)
• BMW – 320D [E90] M47D20 (2005–2007)
• BMW – 320i [E90/E91] N46B20 (2005–2012)
• BMW – 323i [E90] N52B25 (2005–2007)
• BMW – 325i [E90] N52B25 (2005–2013)
• BMW – 330i [E90] N52B30 (2005–2007)
• BMW – 330i [E90/E91] N53B30A (2007–2013)
• BMW – 523i [E60] N52B25 (2005–2010)
• BMW – 523i [E60] N52B25A (2007–2010)
• BMW – 525I [E60] N52B25 (2004–2010)
• BMW – 530i [E60] N52B30 (2005–2007)
• BMW – 530i [E60] N53B30 (2007–2010)
• BMW – X1 sDRIVE 18i [E84] N46B20B (2010–2014)
• BMW – X3 2.0i [E83] N46B20 (2005–2010)
• BMW – Z4 2.0i [E85] N46B20 (2006–2008)

Fitment Notes

• Always match by OEM reference number(s) and vehicle details before ordering.
• Confirm exact fitment using your VIN, engine code, or chassis/platform details if multiple variants exist.
• Trust signal: OEM references and fitment details are provided to support accurate cross-checking.
• Service note: this part requires special tools for mounting — observe service information.
• South Africa nationwide delivery available – contact us for fitment assistance.

Common Questions

Does this alternator freewheel clutch fit my BMW?
This part (EG10025) is listed for the fitments shown on this page. Confirm by matching OEM reference numbers and verifying VIN/engine/chassis where variants exist.

What OEM part numbers does this replace?
Cross-references include 12 31 7 516 105, 12 31 7 516 723, 12 31 7 516 724, 12 31 7 521 178, 12 31 7 525 376, and others listed above (BMW/MINI). Match at least one OEM reference to your original part before ordering.

Do I need special tools to install this?
Yes. The supplied service information notes that this part requires special tools for mounting. Installation should follow the manufacturer service procedure.