How can the fault be diagnosed between the voltage regulator and alternator on BMW 2002?

If the ignition warning lamp remains illuminated when the engine is running and it is confirmed that the drivebelt is intact and correctly tensioned, stop the engine and disconnect the multi-pin plug from the bottom of the regulator unit. Using a piece of wire, bridge the blue and black cable pins of the plug, then start the engine and run it at approximately 1000 rpm. If the ignition warning lamp goes off immediately, the voltage regulator is defective; if the lamp remains on or glows dimly, the alternator is at fault. A faulty regulator should be replaced, while the alternator may only be overhauled to the extent of installing new brushes; otherwise, it should be repaired by a BMW agent or replaced with a new or reconditioned unit, as special tools and equipment are required, along with the delicate nature of the diodes in the alternator.

Genuine BMW Voltage Regulator

Adjustable Voltage Regulator

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33 Voltage Regulators found

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BMW Voltage Regulator
Part Number: 12317603777
$151.97 MSRP: $208.08
You Save: $56.11 (27%)
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Product Specifications
- Other Name: Regulator
Fits the following BMW Models:
- 550i | 2010-2013 | Sedan(F10)
- 550i GT | 2010-2012 | F07
- 550i GT xDrive | 2010-2012 | F07
- 550i xDrive | 2011-2013 | Sedan(F10)
- 750i | 2009-2012 | Base(F01), Sedan(F01)
- 750i xDrive | 2010-2012 | Sedan(F01)
- 750Li | 2009-2012 | Base(F02), Sedan(F02)
- 750Li xDrive | 2010-2012 | Sedan(F02)
- 760Li | 2010-2015 | Sedan(F02)
- Alpina B7 | 2011-2012 | Sedan(F01)
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BMW Voltage Regulator
Part Number: 12311735742
$152.13 MSRP: $201.78
You Save: $49.65 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-1-731-908
Fits the following BMW Models:
- 535i | 1989-1993 | Sedan(E34)
- 735i | 1987-1992 | Sedan(E32)
- 735iL | 1988-1992 | Sedan(E32)
- 750iL | 1988-1994 | Sedan(E32)
- 850Ci | 1993-1994 | Coupe(E31)
- 850CSi | 1994-1995 | Coupe(E31)
- 850i | 1991-1992 | Coupe(E31)
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BMW Voltage Regulator
Part Number: 12317561939
$159.71 MSRP: $218.68
You Save: $58.97 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-7-552-817
Fits the following BMW Models:
- 1 Series M | 2011 | Coupe(E82)
- 128i | 2008-2013 | Convertible N52 Engine(E88), Coupe N52 Engine(E82)
- 135i | 2008-2010 | Convertible N54 Engine(E88), Convertible(E88), Coupe N54 Engine(E82), Coupe(E82)
- 323i | 2007-2011 | Sedan(E90)
- 328i | 2007-2013 | Convertible N51 Engine(E93), Convertible N52 Engine(E93), Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
- 328i xDrive | 2009-2013 | Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
- 328xi | 2007-2008 | Coupe N52 Engine(E92), Sedan N52 Engine(E90), Wagon(E91)
- 335i | 2007-2010 | Convertible(E93), Coupe(E92), Sedan(E90)
- 335i xDrive | 2009-2010 | Coupe(E92), Sedan(E90)
- 335is | 2011-2013 | Convertible(E93), Coupe(E92)
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BMW Voltage Regulator
Part Number: 12318510092
$173.04 MSRP: $236.92
You Save: $63.88 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-7-836-490, 12-31-7-804-137
Fits the following BMW Models:
- 335d | 2009-2011 | Sedan(E90)
- M5 | 2006-2010 | Sedan(E60)
- M6 | 2006-2010 | Convertible(E64), Coupe(E63)
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BMW Voltage Regulator
Part Number: 12317551153
$125.12 MSRP: $196.69
You Save: $71.57 (37%)
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Product Specifications
- Replaces: 12-31-7-501-749
Fits the following BMW Models:
- 320i | 2001-2005 | Sedan(E46)
- 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe(E46)
- 325i | 2001-2005 | Sedan M54 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon(E46)
- 325xi | 2001-2005 | Sedan(E46), Wagon(E46)
- 330Ci | 2001-2006 | Convertible(E46), Coupe(E46)
- 330i | 2001-2005 | Sedan(E46)
- 330xi | 2001-2005 | Sedan(E46)
- 525i | 2001-2003 | Sedan(E39), Wagon(E39)
- 530i | 2001-2003 | Sedan(E39)
- M3 | 2001-2006 | Convertible(E46), Coupe(E46)
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BMW Voltage Regulator
Part Number: 12318510090
$159.71 MSRP: $218.68
You Save: $58.97 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-7-547-082, 12-31-7-567-618, 12-31-7-542-936, 12-31-7-560-559
Fits the following BMW Models:
- 128i | 2008-2013 | Convertible N51 Engine(E88), Coupe N51 Engine(E82)
- 325i | 2006 | Sedan(E90)
- 325xi | 2006 | Sedan(E90), Wagon(E91)
- 328i | 2007-2010 | Coupe N51 Engine(E92), Sedan N51 Engine(E90)
- 328i xDrive | 2009-2010 | Coupe N51 Engine(E92)
- 328xi | 2007-2008 | Coupe N51 Engine(E92), Sedan N51 Engine(E90)
- 330i | 2006 | Sedan(E90)
- 330xi | 2006 | Sedan(E90)
- 525i | 2006-2007 | Sedan(E60)
- 525xi | 2006-2007 | Sedan(E60)
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BMW Voltage Regulator
Part Number: 12317603775
$165.78 MSRP: $226.98
You Save: $61.20 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-7-560-987, 12-31-7-563-833, 12-31-7-567-617
Fits the following BMW Models:
- X5 | 2007-2013 | 4.8i(E70), xDrive35d(E70), xDrive48i(E70)
- X6 | 2008-2010 | xDrive35i(E71)
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BMW Voltage Regulator
Part Number: 12311739193
$154.78 MSRP: $208.56
You Save: $53.78 (26%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 318i | 1992-1995 | Sedan(E36)
- 318is | 1992-1995 | Coupe(E36)
- 325e | 1984-1987 | Coupe(E30), Sedan(E30)
- 325i | 1987-1992 | Convertible(E30), Coupe(E30), Sedan(E30)
- 325is | 1987-1990 | Coupe(E30)
- 325ix | 1988-1991 | Coupe(E30), Sedan(E30)
- 528e | 1982-1988 | Sedan(E28)
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BMW Voltage Regulator
Part Number: 12317515319
$179.94 MSRP: $238.67
You Save: $58.73 (25%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 525i | 2004-2005 | Sedan(E60)
- 530i | 2004-2005 | Sedan(E60)
- Z4 | 2003-2005 | 2.5i(E85), 3.0i(E85)
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BMW Voltage Regulator
Part Number: 12317847517
$159.71 MSRP: $218.68
You Save: $58.97 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-7-837-980
Fits the following BMW Models:
- M3 | 2008-2013 | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW CARBON BRUSH SET
Part Number: 12315A284D3
$93.01 MSRP: $117.64
You Save: $24.63 (21%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Repair Kit, Voltage Regulator
Fits the following BMW Models:
- 430i Gran Coupe | 2022-2024 | 4 Cyl 2.0 L GAS
- 430i xDrive Gran Coupe | 2023-2024 | 4 Cyl 2.0 L GAS
- 530i | 2021-2023 | 4 Cyl 2.0 L GAS
- 530i xDrive | 2021-2023 | 4 Cyl 2.0 L GAS
- X4 | 2022-2024 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- X4 M | 2022-2024 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- X5 | 2021-2023 | 6 Cyl 3.0 L GAS, 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- X5 M | 2021-2023 | 6 Cyl 3.0 L GAS, 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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BMW Voltage Regulator
Part Number: 12311432965
$142.88 MSRP: $216.59
You Save: $73.71 (35%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 12-31-1-702-929
Fits the following BMW Models:
- Z3 | 1996-1998 | 1.9L Engine(E36), Roadster 1.9L(E36), Roadster(E36)
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BMW Voltage Regulator
Part Number: 12317561924
$127.75 MSRP: $174.92
You Save: $47.17 (27%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 128i | 2008-2013 | Convertible N52 Engine(E88), Coupe N52 Engine(E82)
- 323i | 2007-2008 | Sedan(E90)
- 328i | 2007-2013 | Convertible N52 Engine(E93), Coupe N52 Engine(E92), Sedan N52 Engine(E90), Wagon(E91)
- 328i xDrive | 2009-2013 | Coupe N52 Engine(E92), Sedan N52 Engine(E90), Wagon(E91)
- 328xi | 2007-2008 | Coupe N52 Engine(E92), Sedan N52 Engine(E90), Wagon(E91)
- 528i | 2008-2009 | Sedan(E60)
- 528i xDrive | 2009-2010 | Sedan(E60)
- 528xi | 2008 | Sedan(E60)
- X3 | 2007-2010 | 3.0si(E83)
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BMW Controller, Alternator
Part Number: 12318636419
$159.71 MSRP: $218.68
You Save: $58.97 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Controller, Regulator, Voltage Regulator
Fits the following BMW Models:
- 750i | 2016-2019 | Sedan(G12)
- 750i xDrive | 2016-2022 | 8 Cyl 4.4 L GAS, Sedan(G12)
- Alpina B7 | 2017-2019 | Sedan(G12)
- M5 | 2018-2023 | 8 Cyl 4.4 L GAS, Sedan(F90)
- M550i xDrive | 2018-2023 | 8 Cyl 4.4 L GAS, Sedan(G30)
- M8 | 2020-2025 | 8 Cyl 4.4 L GAS, Convertible(F91), Coupe(F92), Gran Coupe(F93)
- M850i xDrive | 2019-2025 | 8 Cyl 4.4 L GAS, Convertible(G14), Coupe(G15)
- M850i xDrive Gran Coupe | 2020-2025 | 8 Cyl 4.4 L GAS, G16
- X5 | 2019-2023 | 8 Cyl 4.4 L GAS, M50i(G05), xDrive50i(G05)
- X5 M | 2021-2023 | 8 Cyl 4.4 L GAS
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BMW Voltage Regulator
Part Number: 12318515518
$159.71 MSRP: $218.68
You Save: $58.97 (27%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 328d | 2014-2015 | Sedan(F30)
- 328d xDrive | 2014-2015 | Sedan(F30), Wagon(F31)
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BMW Voltage Regulator
Part Number: 12317515811
$170.04 MSRP: $232.82
You Save: $62.78 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Regulator
Fits the following BMW Models:
- 525i | 2004-2005 | Sedan(E60)
- 530i | 2004-2005 | Sedan(E60)
- X3 | 2004-2006 | 2.5i(E83), 3.0i(E83)
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BMW Controller, Alternator
Part Number: 12318635481
$179.52 MSRP: $245.79
You Save: $66.27 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Voltage Regulator
Fits the following BMW Models:
- 530i | 2017-2019 | Sedan(G30)
- 530i xDrive | 2017-2019 | Sedan(G30)
- 540d xDrive | 2018 | Sedan(G30)
- 540i | 2017-2019 | Sedan(G30)
- 540i xDrive | 2017-2019 | Sedan(G30)
- 640i xDrive Gran Turismo | 2018-2019 | G32
- 740i | 2016-2019 | Sedan(G12)
- 740i xDrive | 2017-2019 | Sedan(G12)
- M3 | 2021-2024 | 6 Cyl 3.0 L GAS
- M4 | 2021-2024 | 6 Cyl 3.0 L GAS
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BMW Controller, Alternator
Part Number: 12318635480
$179.52 MSRP: $245.79
You Save: $66.27 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Voltage Regulator
Fits the following BMW Models:
- 530i | 2017-2019 | Sedan(G30)
- 530i xDrive | 2017-2019 | Sedan(G30)
- 540d xDrive | 2018 | Sedan(G30)
- 540i | 2017-2019 | Sedan(G30)
- 540i xDrive | 2017-2019 | Sedan(G30)
- 640i xDrive Gran Turismo | 2018-2019 | G32
- 740i | 2016-2019 | Sedan(G12)
- 740i xDrive | 2017-2019 | Sedan(G12)
- X3 | 2021, 2018-2019 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS, M40i(G01), sDrive30i(G01), xDrive30i(G01)
- X3 M | 2021 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS
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BMW Voltage Regulator
Part Number: 12311713491
$476.82 MSRP: $643.38
You Save: $166.56 (26%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 323Ci | 2000 | Convertible(E46), Coupe(E46)
- 323i | 1999-2000 | Sedan(E46), Wagon(E46)
- 328Ci | 2000 | Coupe(E46)
- 328i | 1999-2000 | Sedan(E46)
- 528i | 1997-2000 | Sedan(E39), Wagon(E39)
- 540i | 1997-2003 | Sedan(E39), Wagon(E39)
- 740i | 1997-2001, 1995 | Sedan(E38)
- 740iL | 1995-2001 | Sedan(E38)
- 750iL | 1995-2001 | Sedan(E38)
- 840Ci | 1996-1997 | Coupe(E31)
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BMW Voltage Regulator
Part Number: 12321739435
$160.00 MSRP: $199.74
You Save: $39.74 (20%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pulley
- Replaces: 12-31-1-735-788, 12-31-2-244-626
Fits the following BMW Models:
- 318i | 1992-1998 | Convertible(E36), Sedan(E36)
- 318is | 1992-1999 | Coupe(E36)
- 318ti | 1995-1999 | Hatchback(E36)
- 320i | 1993-1995 | Sedan(E36)
- 323i | 1998-1999 | Convertible(E36)
- 323is | 1998-1999 | Coupe(E36)
- 325i | 1992-1995 | Convertible(E36), Sedan(E36)
- 325is | 1991-1995 | Coupe(E36)
- 328i | 1996-1999 | Convertible(E36), Sedan(E36)
- 328is | 1996-1999 | Coupe(E36)
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1-20 of 33 Results

BMW Voltage Regulator

Keeping the smooth operation of a BMW vehicle relies on the condition of the Voltage Regulator. A broken BMW Voltage Regulator can lead to big performance issues and even a complete vehicle breakdown. To prevent such problems, you could regularly maintain your car and replace your parts. At BMWPartsDeal, we offer high-quality BMW Voltage Regulator, all designed to keep your vehicle running at its best. Choose BMWPartsDeal for your auto parts needs, you will get your vehicle back to great performance, and save a lot by avoiding costly future repair jobs.

BMW Voltage Regulator Parts Questions & Experts Answers

Voltage Regulator
12321350052
Q: How can the fault be diagnosed between the voltage regulator and alternator on BMW 2002?
A:
If the ignition warning lamp remains illuminated when the engine is running and it is confirmed that the drivebelt is intact and correctly tensioned, stop the engine and disconnect the multi-pin plug from the bottom of the regulator unit. Using a piece of wire, bridge the blue and black cable pins of the plug, then start the engine and run it at approximately 1000 rpm. If the ignition warning lamp goes off immediately, the voltage regulator is defective; if the lamp remains on or glows dimly, the alternator is at fault. A faulty regulator should be replaced, while the alternator may only be overhauled to the extent of installing new brushes; otherwise, it should be repaired by a BMW agent or replaced with a new or reconditioned unit, as special tools and equipment are required, along with the delicate nature of the diodes in the alternator.

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