Alternator Overunner Pulley Bmw E87,E46 ,E90,E61 N42B20,N46B20,N52B30 (MAP-100797)

Alternator Freewheel Clutch for BMW / MINI – MAP-100797

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

MAP-100797

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

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 (MAP-100797) 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.