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!

Alternator
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
Fits:
  • BMW:
    • 745i,
    • 745Li,
    • 760Li
MSRP $1,472.12
$976.46
MSRP $1,472.12
$976.46
Alternator
Part Number: 12-31-7-551-253
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: 3.0L, 140 amp. More Info
Fits:
  • BMW:
    • X5
MSRP $634.26
$455.59
MSRP $634.26
$455.59
Alternator
Part Number: 12-31-7-603-781
Other Names: Rp Remanufactured Alternator 123010 More Names
Description: X6. 740i. Reman. 230 Amp.. Xdrive35i. 3.0L turbo, to 3/12. More Info
Fits:
  • BMW:
    • 740i,
    • 740Li,
    • X6
MSRP $1,151.14
$867.96
MSRP $1,151.14
$867.96
Alternator
Part Number: 12-31-7-831-436
Other Names: Rp Remanufactured Compact Alternator 123019 More Names
Description: Z3. 3.2l. M3. 120 amp. 3.2L, remanufactured. More Info
Notes: 4. More Notes
Fits:
  • BMW:
    • M3,
    • Z3
MSRP $689.93
$520.21
MSRP $689.93
$520.21
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. Air cooled, 525i, 528i, 530i, 90 amp. More Info
Notes: 1. More Notes
Fits:
  • BMW:
    • 528i,
    • Z3
MSRP $511.05
$378.69
MSRP $511.05
$378.69
Alternator
Part Number: 12-31-1-466-086
Other Names: Exch Generator 123019 More Names
Description: M3. M5. M6, 90 amp. 318i & 318is, with 90amp. More Info
Fits:
  • BMW:
    • 318i,
    • M3,
    • M5,
    • M6
MSRP $323.00
$264.54
MSRP $323.00
$264.54
Alternator
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: 325. 90 amp. 325. 105 amp. 105 amp, auto trans, remanufactured. 90 amp manual trans, remanufactured. More Info
Fits:
  • BMW:
    • 318i,
    • 318is,
    • 325i,
    • 325is
MSRP $691.78
$602.54
MSRP $691.78
$602.54
Alternator
Part Number: 12-31-1-739-421
Other Names: Exch-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
Fits:
  • BMW:
    • 318i,
    • 318is
MSRP $596.75
$465.47
MSRP $596.75
$465.47
Alternator
Part Number: 12-31-7-616-119
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-616-121
Notes: 12. More Notes
Fits:
  • BMW:
    • 328i,
    • 328i xDrive,
    • 335i,
    • 335i GT xDrive,
    • 335i xDrive,
    • 435i,
    • 435i Gran Coupe,
    • 435i xDrive,
    • 435i xDrive Gran Coupe,
    • 530i,
    • 535i,
    • 535i GT,
    • 535i GT xDrive,
    • 535i xDrive,
    • 540i,
    • 640i,
    • 640i Gran Coupe,
    • 640i xDrive,
    • 640i xDrive Gran Coupe,
    • 740i,
    • 740Li,
    • 740Li xDrive,
    • ActiveHybrid 3,
    • M2,
    • M235i,
    • M235i xDrive,
    • M3,
    • X3,
    • X4,
    • X5,
    • X6
  • 26 more
MSRP $1,055.22
$795.64
MSRP $1,055.22
$795.64
Alternator
Part Number: 12-31-1-247-310
Other Names: Exch-Compact Alternator H12319 More Names
Description: 318ti. 318i, is, ic. 80 amp, 1.9L, remanufactured. More Info
Notes: 11. More Notes
Fits:
  • BMW:
    • 318i,
    • 318is,
    • 318ti,
    • 323i,
    • 323is,
    • 328i,
    • 328is,
    • M3
  • 3 more
MSRP $596.43
$465.21
MSRP $596.43
$465.21
Alternator
Part Number: 12-31-1-738-092
Other Names: Exch.-Alternator H12319 More Names
Replaces: 12-31-1-735-404
Description: 325. 140 amp. 140 amp, remanufactured. More Info
Fits:
  • BMW:
    • 318i,
    • 318is,
    • 325i,
    • 325is
MSRP $679.28
$591.66
MSRP $679.28
$591.66
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
Fits:
  • BMW:
    • 325Ci,
    • 325i,
    • 325xi,
    • 330Ci,
    • 330i,
    • 330xi,
    • 525i,
    • 530i,
    • M3,
    • X5,
    • Z3
  • 6 more
MSRP $462.07
$348.40
MSRP $462.07
$348.40
Alternator
Part Number: 12-31-7-543-083
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: Z4. 3.0l. 155 amp. More Info
Notes: 4. More Notes
Fits:
  • BMW:
    • 325i,
    • 325xi,
    • 330i,
    • 330xi,
    • Z4
MSRP $790.07
$567.49
MSRP $790.07
$567.49
Alternator
Part Number: 12-31-1-466-088
Other Names: Exch Generator 123019 More Names
Description: 735. 140 amp. 535i, 140 amp. More Info
Fits:
  • BMW:
    • 535i,
    • 735i,
    • 735iL
MSRP $445.25
$364.66
MSRP $445.25
$364.66
Alternator
Part Number: 12-31-1-741-138
Other Names: Exch-Compact Alternator H12319 More Names
Replaces: 12-31-1-702-096
Description: 740. All. 750iL. Main, 850Ci. More Info
Notes: 1. More Notes
Fits:
  • BMW:
    • 740i,
    • 740iL,
    • 750iL,
    • 850Ci
MSRP $817.93
$712.41
MSRP $817.93
$712.41
Alternator
Part Number: 12-31-2-241-262
Other Names: Rp Remanufactured Alternator H12319 More Names
Description: Series 5. 524td. 80 amp. More Info
Fits:
  • BMW:
    • 524td
MSRP $580.48
$452.78
MSRP $580.48
$452.78
Alternator
Part Number: 12-31-7-501-592
Other Names: Rp Compact Alternator 123010 More Names
Description: 90a. New, 90 amp. X5. 3.0l. 90 amp. Z3. 3.0l. 90 amp. Z3. 2.5l. 90 amp. 325 & 330i, ci, xi. 90 amp. Air cooled, 525i, 528i, 530i, 90 amp. More Info
Notes: 26. More Notes
Fits:
  • BMW:
    • 323i,
    • 325Ci,
    • 325i,
    • 325xi,
    • 328i,
    • 330Ci,
    • 330i,
    • 330xi,
    • 525i,
    • 530i,
    • M3,
    • X5,
    • Z3
  • 8 more
MSRP $602.47
$399.62
MSRP $602.47
$399.62
Alternator
Part Number: 12-31-7-558-220
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: 135i. 3 series. 535i, 535xi. With 335is. Without diesel. Sedan & wagon, 180 amp, with turbo. 2.5l & 3.0l, remanufactured, with turbo. More Info
Notes: 11. More Notes
Fits:
  • BMW:
    • 1 Series M,
    • 135i,
    • 328i,
    • 328i xDrive,
    • 328xi,
    • 335d,
    • 335i,
    • 335i xDrive,
    • 335is,
    • 335xi,
    • 528i,
    • 528i xDrive,
    • 528xi,
    • 535i,
    • 535i GT,
    • 535i xDrive,
    • 535xi,
    • M3
  • 13 more
MSRP $877.86
$630.57
MSRP $877.86
$630.57
Alternator
Part Number: 12-31-7-560-986
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: X5. 3.0l. Without diesel. 180 amp. With 4-zone/adaptive drive. More Info
Fits:
  • BMW:
    • X5
MSRP $877.86
$630.57
MSRP $877.86
$630.57
Alternator
Part Number: 12-31-7-605-478
Other Names: Rp Alternator 123010 More Names
Fits:
  • BMW:
    • 228i,
    • 228i xDrive,
    • 320i,
    • 320i xDrive,
    • 328i,
    • 328i GT xDrive,
    • 328i xDrive,
    • 428i,
    • 428i Gran Coupe,
    • 428i xDrive,
    • 428i xDrive Gran Coupe,
    • 528i,
    • 528i xDrive,
    • M2,
    • X3,
    • Z4
  • 11 more
MSRP $911.31
$687.13
MSRP $911.31
$687.13
Alternator
Part Number: 12-31-7-640-132
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-640-875
Description: X1. X2. New. Reman. 180 Amp.. Sdrive28i. Xdrive28i. More Info
Fits:
  • BMW:
    • X1,
    • X2
MSRP $1,090.44
$723.29
MSRP $1,090.44
$723.29
Alternator
Part Number: 12-31-7-852-129
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-053-535
Description: X5m. X5. 4.4l. 4.4L, with M8, new. 4.4L, new, with M5. 4.4L twin turbo, m, m competition. More Info
Fits:
  • BMW:
    • M5,
    • M8,
    • M8 Gran Coupe,
    • M850i xDrive,
    • X5,
    • X6
  • 1 more
MSRP $1,371.78
$1,034.32
MSRP $1,371.78
$1,034.32
Alternator
Part Number: 12-31-8-571-358
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-635-553
Fits:
  • BMW:
    • 530e,
    • 530e xDrive,
    • 530i,
    • 530i xDrive,
    • 540d xDrive,
    • 540i,
    • 540i xDrive,
    • 640i xDrive Gran Turismo,
    • 740i,
    • 740i xDrive,
    • X3,
    • X4
  • 7 more
MSRP $1,247.07
$940.29
MSRP $1,247.07
$940.29
Alternator
Part Number: 12-31-1-247-311
Other Names: Exch-Compact Alternator H12319 More Names
Description: New. 70 Amp.. Vendor:bosch. More Info
Fits:
  • BMW:
    • 318i,
    • 318is,
    • 318ti
MSRP $596.42
$465.21
MSRP $596.42
$465.21
Alternator
Part Number: 12-31-1-722-568
Other Names: Rp Remanufactured Alternator H12319 More Names
Description: Reman. 115 Amp.. More Info
Fits:
  • BMW:
    • 525i
MSRP $566.20
$441.64
MSRP $566.20
$441.64
Alternator
Part Number: 12-31-7-540-743
Positions: Left
Other Names: Alternator 123010 More Names
Replaces: 12-31-8-657-228
Description: Left. Reman. M760ix. More Info
Fits:
  • BMW:
    • M760i xDrive
MSRP $959.28
$723.29
MSRP $959.28
$723.29
Alternator
Part Number: 12-31-7-515-029
Other Names: Compact Alternator 123010 More Names
Description: Cooper, Cooper S. 110 amp. Without s. 105 Amp. More Info
Fits:
  • Mini:
    • Cooper
MSRP $530.00
$399.62
MSRP $530.00
$399.62
Alternator
Part Number: 12-31-7-550-319
Other Names: Rp Compact Alternator 123010 More Names
Replaces: 12-31-7-550-997
Description: 120 amp. 2002-06 hatchback, 2002-08 convertible, 110 amp. More Info
Fits:
  • Mini:
    • Cooper
MSRP $611.53
$461.10
MSRP $611.53
$461.10
Alternator
Part Number: 12-31-7-615-484
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-576-513, 12-31-7-576-514, 12-31-7-619-254
Description: Mini Cooper. 120 amp. More Info
Fits:
  • Mini:
    • Cooper
MSRP $719.45
$542.46
MSRP $719.45
$542.46
Alternator
Part Number: 12-31-1-405-918
Other Names: Exch-Compact Alternator H12319 More Names
Description: Z3. 3.2l. 3.2L, remanufactured. More Info
Fits:
  • BMW:
    • Z3
MSRP $663.60
$577.99
MSRP $663.60
$577.99
Alternator
Part Number: 12-31-1-407-440
Other Names: Compact Alternator H12310 More Names
Description: M5. New. 120 Amp.. More Info
Fits:
  • BMW:
    • M5,
    • Z8
MSRP $1,254.41
$913.21
MSRP $1,254.41
$913.21
Alternator
Part Number: 12-31-1-466-339
Other Names: Exch Generator 123019 More Names
Description: 525i, 115 amp. More Info
Fits:
  • BMW:
    • 525i
MSRP $449.25
$367.94
MSRP $449.25
$367.94
Alternator
Part Number: 12-31-1-731-103
Other Names: Additional Alternator H12319 More Names
Replaces: 12-31-1-466-340
Description: 850. Auxiliary, 750iL. Secondary, 32 amp. More Info
Fits:
  • BMW:
    • 750iL,
    • 840Ci,
    • 850Ci,
    • 850CSi,
    • 850i
MSRP $725.80
$566.12
MSRP $725.80
$566.12
Alternator
Part Number: 12-31-1-744-565
Other Names: Exch-Compact Alternator H12319 More Names
Replaces: 12-31-1-738-437, 12-31-1-744-564
Description: M3. 80 amp. Auto trans. 325. 80 amp. 525i, 80 amp. 328i, ci. 80 amp. 328is, ic. 80 amp. 80 amp, 3.0L, remanufactured. 80 amp, 2.8 &... More Info
Notes: 11. More Notes
Fits:
  • BMW:
    • 323i,
    • 323is,
    • 325i,
    • 325is,
    • 328i,
    • 328is,
    • 525i,
    • 525iT,
    • M3,
    • Z3
  • 5 more
MSRP $596.75
$465.47
MSRP $596.75
$465.47
Alternator
Part Number: 12-31-7-501-690
Other Names: Rp Remanufactured Compact Alternator 123019 More Names
Description: 528i. 120 amp. X5. 3.0l. 120 amp. Z3. 2.8l. 120 amp. Z3. 2.5l. 120 amp. Z3. 3.0l. 120 amp. 323i, ci, touring. 328i, ci. 120 amp. 525i,... More Info
Notes: 14. More Notes
Fits:
  • BMW:
    • 323Ci,
    • 323i,
    • 325Ci,
    • 325i,
    • 325xi,
    • 328Ci,
    • 328i,
    • 330Ci,
    • 330i,
    • 330xi,
    • 525i,
    • 528i,
    • 530i,
    • M3,
    • X5,
    • Z3
  • 11 more
MSRP $405.17
$305.50
MSRP $405.17
$305.50
Alternator
Part Number: 12-31-7-526-286
Other Names: Exch Alternator Water-Coole 123019 More Names
Description: 760i, 760Li. 745i, 745Li. 180 amp. More Info
Fits:
  • BMW:
    • 745i,
    • 745Li,
    • 760i,
    • 760Li
MSRP $1,272.91
$945.84
MSRP $1,272.91
$945.84
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
Fits:
  • BMW:
    • X5
MSRP $1,053.41
$756.65
MSRP $1,053.41
$756.65
Alternator
Part Number: 12-31-7-836-592
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: M6. M5. 5.0l, remanufactured. More Info
Fits:
  • BMW:
    • M5,
    • M6
MSRP $873.90
$658.92
MSRP $873.90
$658.92
Alternator
Part Number: 12-31-1-466-091
Other Names: Exch Generator 123019 More Names
Description: 735. 115 amp. 535i, 115 amp. More Info
Fits:
  • BMW:
    • 535i,
    • 735i,
    • 735iL
MSRP $444.00
$363.64
MSRP $444.00
$363.64
Alternator
Part Number: 12-31-7-561-004
Other Names: Rp Remanufactured Alternator 123010 More Names
Description: X5. 4.8l. 180 amp. More Info
Fits:
  • BMW:
    • X5
MSRP $959.28
$723.29
MSRP $959.28
$723.29
Alternator
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: 230 Amp. 4.4L, new. More Info
Notes: 30. More Notes
Fits:
  • BMW:
    • 550i GT,
    • 550i GT xDrive,
    • 650i,
    • 650i xDrive
MSRP $891.12
$683.49
MSRP $891.12
$683.49
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
Fits:
  • BMW:
    • X5
MSRP $746.17
$535.99
MSRP $746.17
$535.99
Alternator
Part Number: 12-31-7-837-981
Other Names: Rp Remanufactured Alternator 123019 More Names
Description: M series. More Info
Fits:
  • BMW:
    • M3
MSRP $919.90
$693.60
MSRP $919.90
$693.60
Alternator
Part Number: 12-31-1-247-488
Other Names: Exch-Compact Alternator H12319 More Names
Description: Z3. 1.9l. More Info
Fits:
  • BMW:
    • Z3
MSRP $588.52
$489.65
MSRP $588.52
$489.65
Alternator
Part Number: 12-31-1-704-082
Other Names: Exch-Compact Alternator H12319 More Names
Replaces: 12-31-1-468-623, 12-31-1-747-204
Description: 840Ci. 530, 540. 740i & 740iL. More Info
Fits:
  • BMW:
    • 530i,
    • 540i,
    • 740i,
    • 740iL,
    • 840Ci
MSRP $742.18
$578.89
MSRP $742.18
$578.89
Alternator
Part Number: 12-31-1-744-567
Other Names: Exch-Compact Alternator H12319 More Names
Replaces: 12-31-1-738-351, 12-31-1-738-352, 12-31-1-744-563
Description: New. Auto trans. M3. 140 amp. 325. 140 amp. 525i, 140 amp. 328i, ci. 140 amp. 328is, ic. 140 amp. 323is, ic. 140 amp. From 09/1991. 140... More Info
Notes: 13. More Notes
Fits:
  • BMW:
    • 318i,
    • 318is,
    • 323i,
    • 323is,
    • 325i,
    • 325is,
    • 328i,
    • 328is,
    • 525i,
    • 525iT,
    • M3,
    • Z3
  • 7 more
MSRP $693.78
$541.15
MSRP $693.78
$541.15
Alternator
Part Number: 12-31-7-540-993
Other Names: Rp Alternator 123010 More Names
Replaces: 12-31-7-537-959, 12-31-7-540-994
Description: New. More Info
Fits:
  • BMW:
    • X5
MSRP $616.41
$528.88
MSRP $616.41
$528.88
Alternator
Part Number: 12-31-7-541-694
Other Names: Rp Compact Alternator 123010 More Names
Replaces: 12-31-7-519-721, 12-31-7-519-723, 12-31-7-521-135, 12-31-7-521-136, 12-31-7-521-137, 12-31-7-541-696, 12-31-7-546-284, 12-31-7-546-285
Description: From 03/04. New. 155 Amp. More Info
Notes: 4. More Notes
Fits:
  • BMW:
    • 525i,
    • 530i
MSRP $733.88
$553.35
MSRP $733.88
$553.35
Alternator
Part Number: 12-31-7-603-783
Other Names: Rp Remanufactured Alternator 123010 More Names
Description: 760Li. More Info
Fits:
  • BMW:
    • 760Li
MSRP $1,151.14
$867.96
MSRP $1,151.14
$867.96

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