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BMW Motorcycle Electrical Systems

Your motorcycle most likely has a battery on board. That's what delivers the juice needed to start the bike. The battery also stores a specific amount of electric energy. It's charged by an alternator -- or generator -- that's drive by the engine.

Most motorcycles also feature a rectifier unit that converts the AC electricity from the generator into the DC electricity that your battery needs. In addition, parts such as your lights and electronics require DC power in order to work properly. Of course, there are also the many switches, wires, and relays that enable the system to fully operate.

How to Spot a Faulty Electrical System

Even the best electrical systems can go bad over time. Signs of this include:

  • Lights brighten and dim while you're riding
  • Your engine begins to sputter when you're riding
  • Your bike won't start
  • The battery warning light comes on
  • Buy Genuine BMW Motorrad Electrical System Parts Online

    Be sure to thoroughly test your entire electrical system if you're experiencing any of these symptoms. Your battery could be at fault, or maybe the alternator is going bad. Maybe the rectifier is failing. No matter what's wrong, there's an easy solution right at hand. Enter your model and year to the left, and all of the parts you need for your project will appear. Since our online parts center only sells the real-deal electrical system components that your manufacturer made for your model, you can trust their quality, fit, and performance. Buy now and we'll ship your order directly to your front door!

    Refine Results
    Auxiliary Cable For Side Stand
    $37.36
    Part Number: 61118394114
    Other Names: Auxiliary Cable For Side More Names
    Auxiliary Cable With Relay
    $495.52
    Part Number: 61128354035
    Other Names: Auxiliary Cable With Rela More Names
    Description: Observe service information! Si 01_2017. More Info
    Camshaft Position Sensor
    $142.09
    Part Number: 12727707899
    Other Names: Engine Camshaft Position Sensor More Names
    Camshaft Position Sensor
    $84.26
    Part Number: 12728523317
    Other Names: Engine Camshaft Position Sensor More Names
    Replaces: 13627729480
    Camshaft Position Sensor
    $155.04
    Part Number: 12728555265
    Other Names: Engine Camshaft Position Sensor More Names
    Replaces: 12727674768
    Camshaft Position Sensor
    $141.47
    Part Number: 13628697982
    Other Names: Engine Camshaft Position Sensor More Names
    Replaces: 13628614650
    Crankshaft Sensor
    $106.07
    Part Number: 13628623437
    Other Names: Engine Crankshaft Position Sensor More Names
    Description: Only in conjunction with. More Info
    Camshaft Position Sensor
    $115.20
    Part Number: 12728555163
    Other Names: Engine Camshaft Position Sensor More Names
    Camshaft Position Sensor
    $142.09
    Part Number: 12728559634
    Other Names: Engine Camshaft Position Sensor More Names
    Camshaft Position Sensor
    $141.47
    Part Number: 13627633958
    Other Names: Engine Camshaft Position Sensor More Names
    Crankshaft Sensor
    $159.62
    Part Number: 12727674201
    Other Names: Engine Crankshaft Position Sensor More Names
    Crankshaft Sensor
    $174.11
    Part Number: 13627670368
    Other Names: Engine Crankshaft Position Sensor More Names
    Ignition Coil
    $235.13
    Part Number: 12131464968
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12137710874
    Other Names: Ignition Coil More Names
    Ignition Coil
    $214.66
    Part Number: 12138395962
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12138520154
    Other Names: Ignition Coil More Names
    Additional Battery Holder
    $57.21
    Part Number: 61212316996
    Description: For vehicles with additional battery [X537A (+)]. More Info
    Bracket, Ignition Coil
    $19.58
    Part Number: 12131459042
    Other Names: Ignition Coil Mounting Bracket More Names
    Wire Ignition Coil
    $54.18
    Part Number: 61121244176
    Other Names: Ignition Coil Lead Wire More Names
    Ignition Coil
    $235.13
    Part Number: 12131341978
    Other Names: Ignition Coil More Names
    Replaces: 12132306330
    Ignition Coil
    $251.70
    Part Number: 12131459513
    Other Names: Ignition Coil More Names
    Replaces: 12131459034
    Ignition Coil Cover, Left
    $414.50
    Part Number: 11128393255
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with option 719 milled parts package classic [X796A (+)] or option 719 milled parts package storm [X797A (+)]. More Info
    Ignition Coil Cover, Right
    $414.50
    Part Number: 11128393256
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with option 719 milled parts package classic [X796A (+)] or option 719 milled parts package storm [X797A (+)]. More Info
    Ignition Coil Cover, Right
    $414.50
    Part Number: 11128395866
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with option 719 mill.parts package club sport [X798A (+)]. More Info
    Ignition Coil Cover, Left
    $453.62
    Part Number: 11128409877
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with edition [Q47ba (-)] or design option, chrome [X35aa (+)] or option 719 design package aero [X79da (+)]. More Info
    Ignition Coil Cover, Left
    $43.17
    Part Number: 11128532975
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Ignition Coil Cover, Left
    $536.14
    Part Number: 11129443751
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with design option, chrome [X35aa (+)] or option 719 design package aero [X79da (+)]. More Info
    Ignition Coil Cover, Right
    $536.14
    Part Number: 11129443752
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with design option, chrome [X35aa (+)] or option 719 design package aero [X79da (+)]. More Info
    Ignition Coil Grommet, Black
    $204.47
    Part Number: 12137715852
    Other Names: Ignition Coil Cover Grommet More Names
    Replaces: 12137663048
    Angeld Ignition Coil, Right
    $214.66
    Part Number: 12137715856
    Options: Right
    Other Names: Ignition Coil More Names
    Replaces: 12137676572, 12137692262, 12137696510
    Angled Ignition Coil, Left
    $214.66
    Part Number: 12138520173
    Options: Left
    Other Names: Ignition Coil More Names
    Angeld Ignition Coil, Right
    $214.66
    Part Number: 12138520174
    Options: Right
    Other Names: Ignition Coil More Names
    Angled Ignition Coil, Left
    $214.66
    Part Number: 12138565079
    Options: Left
    Other Names: Ignition Coil More Names
    Ignition Coil Cover, Left
    $205.00
    Part Number: 77121540881
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Cable Duct
    $9.08
    Part Number: 61127675553
    Description: Only in conjunction with. More Info
    Cable Duct
    $8.85
    Part Number: 61138554008
    Description: Installation only in profesional service facility. More Info
    Ignition Coil
    $106.78
    Part Number: 12131244142
    Other Names: Ignition Coil More Names
    Ignition Coil
    $348.51
    Part Number: 12131244426
    Other Names: Ignition Coil More Names
    Replaces: 12131243910
    Ignition Coil
    $214.66
    Part Number: 12132346570
    Other Names: Ignition Coil More Names
    Ignition Coil
    $334.50
    Part Number: 12138004104
    Other Names: Ignition Coil More Names
    Ignition Coil
    $55.90
    Part Number: 12138030025
    Other Names: Ignition Coil More Names
    Ignition Coil
    $99.29
    Part Number: 12138030052
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12138395963
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12138567157
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12139443112
    Other Names: Ignition Coil More Names
    Ignition Coil Support
    $13.08
    Part Number: 12131342222
    Other Names: Ignition Coil Mounting Bracket More Names
    Bracket, Ignition Coil
    $12.89
    Part Number: 12137679956
    Other Names: Ignition Coil Mounting Bracket More Names
    Ignition Coil Cover, Milled, Left
    $414.50
    Part Number: 11129829735
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Spark-Plug Shaft Ignition Coil
    $204.47
    Part Number: 12137715847
    Other Names: Ignition Coil More Names
    Replaces: 12137707549
    Ignition Coil, Double-Ignition
    $235.13
    Part Number: 12137671712
    Other Names: Ignition Coil More Names
    Description: Observe the following for official-use vehicles! Before ordering parts, please check whether the vehicle has a single or dual-ignition... More Info
    Ignition Coil Cover, Left
    $238.53
    Part Number: 11121542409
    Options: Left
    Description: For vehicles with option 719 design package aero [X79da (+)]. More Info
    Ignition Coil Cover, Right
    $43.17
    Part Number: 11128532976
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Angled Ignition Coil, Left
    $214.66
    Part Number: 12137715857
    Options: Left
    Other Names: Ignition Coil More Names
    Replaces: 12137698929
    Ignition Coil Grommet, Black
    $204.47
    Part Number: 12138523968
    Other Names: Ignition Coil Cover Grommet More Names
    Replaces: 12137670815, 12137709080, 12137715846
    Cover, Ignition Coil, Right
    $43.17
    Part Number: 12139443072
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Ignition Coil Cover, Right
    $205.00
    Part Number: 77121540882
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Ignition Coil
    $132.79
    Part Number: 12131243452
    Other Names: Ignition Coil More Names
    Ignition Coil
    $180.20
    Part Number: 12131459059
    Other Names: Ignition Coil More Names
    Ignition Coil
    $214.66
    Part Number: 12132343281
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12137668210
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12137707153
    Other Names: Ignition Coil More Names
    Ignition Coil
    $204.47
    Part Number: 12138561404
    Other Names: Ignition Coil More Names
    Ignition Coil With Interfer.Suppression
    $399.71
    Part Number: 12131342178
    Other Names: Ignition Coil More Names
    Description: For vehicles with total elimination of interferences [X461A (+)] for vehicles with authority version. More Info
    Wire Ignition Coil
    $8.63
    Part Number: 61111243647
    Other Names: Ignition Coil Lead Wire More Names
    Wire Ignition Coil
    $4.41
    Part Number: 61111243871
    Other Names: Ignition Coil Lead Wire More Names
    Wire Ignition Coil
    $71.38
    Part Number: 61121244177
    Other Names: Ignition Coil Lead Wire More Names
    Cable Duct, Left
    $43.17
    Part Number: 11128532977
    Options: Left
    Ignition Coil Cover, Milled, Right
    $414.50
    Part Number: 11128405496
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Ignition Coil Cover, Milled, Left
    $414.50
    Part Number: 11128405503
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Spark-Plug Shaft Ignition Coil
    $204.47
    Part Number: 12137715853
    Other Names: Ignition Coil More Names
    Replaces: 12137671896, 12137680644
    Description: Observe the following for official-use vehicles! Before ordering parts, please check whether the vehicle has a single or dual-ignition... More Info
    Notes: For vehicles with total elimination of interferences [X461A (+)]. More Notes
    Spark-Plug Shaft Ignition Coil
    $204.47
    Part Number: 12138526677
    Other Names: Ignition Coil More Names
    Ignition Coil Cover, Right
    $238.53
    Part Number: 11121542410
    Options: Right
    Other Names: Ignition Coil Cover, Righ More Names
    Description: For vehicles with option 719 design package aero [X79da (+)]. More Info
    Ignition Coil Cover, Left
    $414.50
    Part Number: 11128395865
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with option 719 mill.parts package club sport [X798A (+)]. More Info
    Ignition Coil Cover, Right
    $37.00
    Part Number: 11129445252
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Ignition Coil Grommet, Gray
    $204.47
    Part Number: 12137715851
    Other Names: Ignition Coil Cover Grommet More Names
    Replaces: 12137679809
    Angeld Ignition Coil, Right
    $214.66
    Part Number: 12137715858
    Options: Right
    Other Names: Ignition Coil More Names
    Replaces: 12137698930
    Angeld Ignition Coil, Right
    $214.66
    Part Number: 12138565080
    Options: Right
    Other Names: Ignition Coil More Names
    Cover, Ignition Coil, Left
    $43.17
    Part Number: 12139443071
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Bracket, Ignition Coil
    $11.54
    Part Number: 12137663045
    Other Names: Ignition Coil Mounting Bracket More Names
    Bracket For Battery
    $14.06
    Part Number: 61217671333
    Description: Only in conjunction with. More Info
    Bracket For Battery
    $39.30
    Part Number: 61218396868
    Other Names: Vehicle Battery Bracket More Names
    Ignition Coil Cover, Milled, Left
    $414.50
    Part Number: 11128405495
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Ignition Coil Cover, Milled, Right
    $414.50
    Part Number: 11129829736
    Options: Right
    Other Names: Ignition Coil Cover More Names
    Spark-Plug Shaft Ignition Coil
    $204.47
    Part Number: 12138523972
    Other Names: Ignition Coil More Names
    Spark-Plug Shaft Ignition Coil
    $204.47
    Part Number: 12138560173
    Other Names: Ignition Coil More Names
    Ignition Coil, Double-Ignition
    $399.71
    Part Number: 12137677942
    Other Names: Ignition Coil More Names
    Description: Observe the following for official-use vehicles! Before ordering parts, please check whether the vehicle has a single or dual-ignition... More Info
    Notes: For vehicles with total elimination of interferences [X461A (+)]. More Notes
    Ignition Coil Cover, Left
    $69.09
    Part Number: 11128394385
    Options: Left
    Other Names: Ignition Coil Cover More Names
    Description: For vehicles with option 719 milled parts package classic [X796A (-)] and option 719 milled parts package storm [X797A (-)] and hp... More Info

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