OEM BMW Alternators

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You already know that the battery, spark plugs, and starter team up to produce the ignition needed to start your BMW. The electricity for that comes courtesy of the battery. After that, though, the majority of the electricity that powers your many systems is produced by the factory alternator.

How Your Alternator Works

First, a crankshaft converts the engine pistons' up-and-down movement into rotary, or circular, motion. That turns a drive belt, which spins a pulley located on the rotor shaft. That pulley causes magnetic coils inside the rotor to begin to rotate, which produces electricity. That's the source of the power that your windows, electronics, and more rely upon to operate.

How To Spot An Alternator That's Going Bad

Unfortunately, your alternator won't announce that it's going bad. Instead, have yours checked if you notice any of these signs:

  • Your windows stop operating
  • Your entertainment system starts acting up
  • Your headlights start to dim or flicker
  • Your battery dies repeatedly
  • You hear a whining sound from your engine

If you suspect that your alternator is starting to fail, the first thing to do is to test your charging system. Measure your battery's voltage with the engine turned off. If it reads below 12.5 volts, give the battery a good charging. If it still reads low after that, your alternator is probably at fault. You don't want to risk having a complete electrical system shutdown on the open road. If your alternator does need to be replaced, make sure that you only use a genuine BMW alternator. They're the only ones guaranteed to work with your model. We have plenty in stock in our online auto parts department, along with any accessories you may need. Buy now and save!

Generator Water Cooled 123010
Part Number: 12-31-7-523-605
Other Names: Generator Water Cooled 123010 More Names
Replaces: 12-31-7-509-096, 12-31-7-509-109, 12-31-7-526-285
Description: 745i, 745Li. 150 amp. 4.4L 2002-03, 6.0L, 150 amp, new. More Info
Notes: Alternator Is Serviced Only As An Assy. More Notes
MSRP $1,347.28
$1,015.85
MSRP $1,347.28
$1,015.85
Alternator
Part Number: 12-31-7-551-253
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: 3.0L, 140 amp. More Info
MSRP $544.82
$424.96
MSRP $544.82
$424.96
Alternator
Part Number: 12-31-7-831-436
Other Names: Rp Remanufactured Compact Alternator 123019 More Names
Description: Z3. 3.2l. 120 Amp.. Reman. More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $622.08
$485.23
MSRP $622.08
$485.23
Alternator
Part Number: 12-31-1-432-984
Other Names: Rp Remanufactured Compact Alternator H12319 More Names
Description: Z3. 2.8l. 90 amp. Z3. 2.5l. 90 amp. 2.5 & 3.0L, 90 amp, remanufactured. 528i. 90 amp. More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $519.98
$405.59
MSRP $519.98
$405.59
Alternator
Part Number: 12-31-1-466-086
Other Names: Exch Generator 123019 More Names
Description: M3. M6, 90 amp. 318i & 318is, with 90amp. M5. More Info
Notes: Order by amp, year and description. More Notes
MSRP $323.00
$264.54
MSRP $323.00
$264.54
Alternator H12310
Part Number: 12-31-1-735-403
Other Names: Rp Remanufactured Alternator H12319 More Names
Replaces: 12-31-1-730-752, 12-31-1-730-753, 12-31-1-735-402, 12-31-1-735-695, 12-31-1-735-696, 12-31-1-735-698
Description: 105 amp, auto trans, remanufactured. 90 amp manual trans, remanufactured. 325. 105 amp. 325. 90 amp. More Info
Notes: Order by description. More Notes
MSRP $715.13
$622.88
MSRP $715.13
$622.88
Alternator H12310
Part Number: 12-31-1-739-421
Other Names: Compact Alternator H12319 More Names
Replaces: 12-31-1-721-692, 12-31-1-721-778, 12-31-1-721-921, 12-31-1-721-923, 12-31-1-727-576
Description: 318i, 80 amp. More Info
MSRP $605.67
$472.42
MSRP $605.67
$472.42
Alternator 123010
Part Number: 12-31-7-616-119
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-616-121
Notes: Alternator Is Serviced As An Assembly Only. More Notes
MSRP $1,097.78
$827.72
MSRP $1,097.78
$827.72
Alternator
Part Number: 12-31-1-247-310
Other Names: Compact Alternator H12319 More Names
Description: 80 amp, 1.9L, remanufactured. 318i, is, ic. 318ti. More Info
Notes: Serviced As An Assembly Only. More Notes
MSRP $605.35
$472.17
MSRP $605.35
$472.17
Exch Alternator H12319
Part Number: 12-31-1-738-092
Other Names: Alternator H12319 More Names
Replaces: 12-31-1-735-404
Description: 140 amp, remanufactured. 325. 140 amp. More Info
Notes: Order by description. More Notes
MSRP $715.79
$623.45
MSRP $715.79
$623.45
Alternator
Part Number: 12-31-7-501-687
Other Names: Rp Remanufactured Compact Alternator 123019 More Names
Description: 525i, 530i. 90 amp. 325 & 330i, ci, xi. 90 amp. 2.5 & 3.0L, 90 amp, remanufactured. More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $416.62
$324.96
MSRP $416.62
$324.96
Alternator
Part Number: 12-31-1-466-088
Other Names: Exch Generator 123019 More Names
Description: 735. 140 amp. 535. 140 amp. More Info
MSRP $445.25
$364.66
MSRP $445.25
$364.66
Compact Alternator 123010
Part Number: 12-31-1-741-138
Other Names: Compact Alternator H12319 More Names
Replaces: 12-31-1-702-096
Description: 740. 750. All. Main, 850Ci. More Info
Notes: Alternator Is Only Sold As An Assembly For 1996-97. More Notes
MSRP $830.15
$723.06
MSRP $830.15
$723.06
Alternator
Part Number: 12-31-7-501-592
Other Names: Rp Compact Alternator 123010 More Names
Description: 90a. Z3. 2.5l. 90 amp. New, 90 amp. More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $551.38
$415.74
MSRP $551.38
$415.74
Alternator
Part Number: 12-31-7-558-220
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: 535i, 535xi. 3 series. 2.5l & 3.0l, remanufactured, with turbo. 135i. Without diesel. With 335is. Sedan & wagon, 180 amp, with turbo. More Info
Notes: Part listed is remanufactured. More Notes
MSRP $754.05
$588.16
MSRP $754.05
$588.16
Alternator
Part Number: 12-31-7-605-478
Other Names: Rp Alternator 123010 More Names
Description: 4 series. 428i. 170amp. 528i, 528xi. Z4. Without m sport package. X3. 28i series. 170 amp. 3 series gt. 328xi. 170 amp. 2.0L turbo.... More Info
MSRP $944.67
$712.28
MSRP $944.67
$712.28
Alternator 123010
Part Number: 12-31-7-640-132
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-640-875
Description: X1. 180 Amp.. New. Reman. X2. Sdrive28i. Xdrive28i. More Info
MSRP $997.97
$752.47
MSRP $997.97
$752.47
Alternator 123010
Part Number: 12-31-7-852-129
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-053-535
Description: 4.4L, with M8, new. X5. 4.4l. X5m. M5. 4.4L twin turbo, m, m competition. More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $1,427.10
$1,076.04
MSRP $1,427.10
$1,076.04
Alternator 123010
Part Number: 12-31-8-571-358
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-8-635-553
Description: 5 series. Without gt models. 740i, 740ix. 250a. New. X4. 3.0l. M, m competition. 640i xDrive Gran Turismo. 250a. Remanufactured, 250... More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $1,297.38
$978.22
MSRP $1,297.38
$978.22
Alternator
Part Number: 12-31-1-247-311
Other Names: Compact Alternator H12319 More Names
Description: 70 Amp.. New. Vendor:bosch. More Info
MSRP $605.35
$472.17
MSRP $605.35
$472.17
Alternator
Part Number: 12-31-1-722-568
Other Names: Rp Remanufactured Alternator H12319 More Names
Description: 115 Amp.. Reman. More Info
MSRP $574.65
$448.23
MSRP $574.65
$448.23
Alternator 123010
Part Number: 12-31-7-540-743
Options: Left
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-657-228
Description: M760ix. Left. Reman. More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $997.97
$752.47
MSRP $997.97
$752.47
Alternator
Part Number: 12-31-1-405-918
Other Names: Compact Alternator H12319 More Names
Description: Z3. 3.2l. 3.2L, remanufactured. More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $673.49
$586.61
MSRP $673.49
$586.61
Alternator
Part Number: 12-31-1-407-440
Other Names: Compact Alternator H12310 More Names
Description: M5. 120 Amp.. New. More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $1,273.18
$926.87
MSRP $1,273.18
$926.87
Alternator
Part Number: 12-31-1-466-339
Other Names: Exch Generator 123019 More Names
Description: 525i, 115 amp. More Info
MSRP $449.25
$367.94
MSRP $449.25
$367.94
Additional Alternator 123010
Part Number: 12-31-1-731-103
Other Names: Additional Alternator H12319 More Names
Replaces: 12-31-1-466-340
Description: 850. Secondary. Auxiliary, 750iL. More Info
MSRP $736.65
$574.59
MSRP $736.65
$574.59
Exch Compact Alternator H12319
Part Number: 12-31-1-744-565
Other Names: Compact Alternator H12319 More Names
Replaces: 12-31-1-738-437, 12-31-1-744-564
Description: 328is, ic. 80 amp. Auto trans. M3. 80 amp. 328i, ci. 80 amp. 325. 80 amp. 525i, 80 amp. 80 amp, 3.0L, remanufactured. 80 amp, 2.8 &... More Info
Notes: Serviced As An Assembly Only. More Notes
MSRP $605.67
$472.42
MSRP $605.67
$472.42
Alternator
Part Number: 12-31-7-501-690
Other Names: Rp Remanufactured Compact Alternator 123019 More Names
Description: 325 & 330i, ci, xi. 120 amp. Remanufactured, 120 amp. X5. 3.0l. 120 amp. 525i, 530i. 120 amp. Z3. 2.8l. 120 amp. Z3. 2.5l. 120 amp. Z3.... More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $480.72
$374.96
MSRP $480.72
$374.96
Alternator
Part Number: 12-31-7-526-286
Other Names: Rp Remanufactured Alternator Water C 123019 More Names
Description: 760i, 760Li. 745i, 745Li. 180 amp. More Info
Notes: Alternator Is Serviced Only As An Assy. More Notes
MSRP $1,204.85
$939.78
MSRP $1,204.85
$939.78
Alternator
Part Number: 12-31-7-560-989
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: 3.0L gas non turbo, 220 amp. More Info
MSRP $904.85
$705.78
MSRP $904.85
$705.78
Alternator
Part Number: 12-31-7-836-592
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: M6. M5. 5.0l, remanufactured. More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $787.97
$614.61
MSRP $787.97
$614.61
Alternator
Part Number: 12-31-1-466-091
Other Names: Exch Generator 123019 More Names
Description: 735. 115 amp. 535i, 115 amp. More Info
MSRP $444.00
$363.64
MSRP $444.00
$363.64
Alternator
Part Number: 12-31-7-801-173
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: X5. 3.0l. With diesel. With 4 zone ctrl. More Info
Notes: Alternator Is Serviced As An Assembly Only. More Notes
MSRP $640.95
$499.94
MSRP $640.95
$499.94
Alternator
Part Number: 12-31-7-837-981
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: M series. More Info
Notes: Serviced As An Assembly Only. More Notes
MSRP $829.45
$646.97
MSRP $829.45
$646.97
Alternator
Part Number: 12-31-1-247-488
Other Names: Compact Alternator H12319 More Names
Description: Z3. 1.9l. More Info
Notes: Alternator Is Sold Only As An Assembly For 1996-01. More Notes
MSRP $597.33
$496.98
MSRP $597.33
$496.98
Exch Generator 123019
Part Number: 12-31-1-704-082
Other Names: Compact Alternator H12319 More Names
Replaces: 12-31-1-468-623, 12-31-1-747-204
Description: 530, 540. 740i & 740iL. 840Ci. More Info
Notes: Alternator Is Only Sold As An Assembly For 1996-97. More Notes
MSRP $753.27
$587.55
MSRP $753.27
$587.55
Compact Alternator H12310
Part Number: 12-31-1-744-567
Other Names: Compact Alternator H12319 More Names
Replaces: 12-31-1-738-351, 12-31-1-738-352, 12-31-1-744-563
Description: Reman. 328is, ic. 140 amp. Auto trans. M3. 140 amp. New. 328i, ci. 140 amp. 323is, ic. 140 amp. 525i, 140 amp. From 09/1991. 140 Amp.. More Info
Notes: Serviced As An Assembly Only. More Notes
MSRP $704.15
$549.24
MSRP $704.15
$549.24
Alternator
Part Number: 12-31-8-611-280
Other Names: Generator 123010 More Names
Replaces: 12-31-8-636-418
Description: 250 Amp.. 4.4L twin turbo, remanufactured, without m model. 4.4L, without M8, reman. 4.4L, reman, without M5. 4.4L twin turbo, m50i,... More Info
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $1,297.38
$978.22
MSRP $1,297.38
$978.22
Alternator 123010
Part Number: 12-31-8-614-276
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-614-278
MSRP $997.97
$752.47
MSRP $997.97
$752.47
Alternator 123010
Part Number: 12-31-8-571-357
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-8-635-552
Notes: Alternator Is Serviced Only As An Assembly. More Notes
MSRP $997.97
$752.47
MSRP $997.97
$752.47
Alternator 123010
Part Number: 12-31-8-645-329
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-645-326, 12-31-8-645-325, 12-31-8-648-046, 12-31-8-648-047
Description: 430i, 430ix. 190amp. 2.0L, 190 amp, reman. 330i, 330ix. 190amp. 230i, 230ix. 3 series gt. 330xi. 190 amp. 330i xDrive. 190amp. More Info
MSRP $1,197.59
$902.98
MSRP $1,197.59
$902.98
Compact Alternator 123010
Part Number: 12-31-1-433-266
Other Names: Rp Remanufactured Compact Alternator H12319 More Names
Replaces: 12-31-1-432-831, 12-31-1-432-832, 12-31-1-433-265
Description: 740i,740iL. 140 Amp.. Reman. 840Ci. More Info
Notes: Alternator Is Only Sold As An Assembly For 1996-97. More Notes
MSRP $970.84
$845.60
MSRP $970.84
$845.60
Alternator
Part Number: 12-31-1-466-079
Other Names: Exch Generator 123019 More Names
Description: Series 5. 528. 65 amp. 528e. Series 5. 524td. 65 amp. More Info
MSRP $244.25
$196.97
MSRP $244.25
$196.97
Alternator
Part Number: 12-31-7-591-532
Other Names: Rp Alternator 123010 More Names
Description: To 03/2012. 170 Amp. More Info
MSRP $911.31
$687.13
MSRP $911.31
$687.13
Alternator 123010
Part Number: 12-31-7-603-779
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-4-595-890, 12-31-7-575-344, 12-31-7-603-782
Description: 4.4L, new. 230 Amp. More Info
Notes: Alternator Is Serviced As An Assembly Only. More Notes
MSRP $1,197.59
$902.98
MSRP $1,197.59
$902.98
Alternator 123010
Part Number: 12-31-7-616-120
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-616-122, 12-31-7-626-155, 12-31-7-626-153
Description: 535i. From 7/12. 4 series. 435i. 3.0L turbo, without hybrid, manual trans. M2. 210 Amp.. Reman. More Info
Notes: Serviced As An Assembly Only. More Notes
MSRP $1,097.78
$827.72
MSRP $1,097.78
$827.72

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