Automotive electrical systems

At Global Parts, we offer a wide selection of original used car parts, including automotive electrical systems for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each of our car parts undergoes quality control to ensure you receive a top-quality product.

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Mercedes-Benz W203 M111 C 200 230 K Bosch Alternator Generator A0111547202

Part no. A0111547202

Mercedes-Benz W203 M111 C 200 230 K Bosch Alternator Generator A0111547202

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BMW E90 Body Control Module M Junction Box PL2RR JBBFE IIIR ECU 9364819

Part no. 9364819-3

BMW E90 Body Control Module M Junction Box PL2RR JBBFE IIIR ECU 9364819

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Mercedes S204 Estate Fuse Box Rear SAM Module Control Unit A2049005003

Part no. A2049005003

Mercedes S204 Estate Fuse Box Rear SAM Module Control Unit A2049005003

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Ford Transit Connect Negative Battery Terminal Cable Wiring 9T1T-14A280-MBC

Part no. 9T1T-14A280-MBC

Ford Transit Connect Negative Battery Terminal Cable Wiring 9T1T-14A280-MBC

Product currently unavailable

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STAG QBOX Basic LPG CNG 4-Cylinder Control Unit Module Injection Controller ECU

Part no. STAG QBOX

STAG QBOX Basic LPG CNG 4-Cylinder Control Unit Module Injection Controller ECU

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Audi A3 8P Speaker Tweeter Front Left Right N/O/S Pillar A 8P0035399B

Part no. 8P0035399B

Audi A3 8P Speaker Tweeter Front Left Right N/O/S Pillar A 8P0035399B

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Audi Q3 8U Air Module Crash Impact Sensor Control Unit 8U0959651

Part no. 8U0959651

Audi Q3 8U Air Module Crash Impact Sensor Control Unit 8U0959651

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Ford Transit MK7 2.4 TDCI T24DD0P Diesel Engine Control Unit ECU AC1112A650BC

Part no. AC1112A650BC

Ford Transit MK7 2.4 TDCI T24DD0P Diesel Engine Control Unit ECU AC1112A650BC

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Mercedes W164 W251 Fuse Box Fuse And Relay Module Rear Unit A1645402372

Part no. A1645402372-1

Mercedes W164 W251 Fuse Box Fuse And Relay Module Rear Unit A1645402372

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MINI Cooper R52 R53 W11 170HP Engine ECU Control Unit DME 7545789 Manual

Part no. 7545789-14

MINI Cooper R52 R53 W11 170HP Engine ECU Control Unit DME 7545789 Manual

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BMW F15 F16 F31 F36 Module Control Unit Trunk Lid Rear Tailgate Lift 7384722

Part no. 7412610

BMW F15 F16 F31 F36 Module Control Unit Trunk Lid Rear Tailgate Lift 7384722

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 BMW G20 Head Unit Navigation Audio Player Controller Module 9875930

Part no. 9875930

BMW G20 Head Unit Navigation Audio Player Controller Module 9875930

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BMW X6 F16 Bumper PDC Wiring Loom Parking Sensor Rear Cable Harness 9367702

Part no. 9367702

BMW X6 F16 Bumper PDC Wiring Loom Parking Sensor Rear Cable Harness 9367702

Product currently unavailable

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Audi S8 A8 D3 4E Air Shock Absorber Sensor Damper Front Left N/S  4E0616575K

Part no. 4E0616575K

Audi S8 A8 D3 4E Air Shock Absorber Sensor Damper Front Left N/S 4E0616575K

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BMW E90 LCI Amplifier Hifi Speaker System Control Unit Module 9143156 6960925

Part no. 9143156

BMW E90 LCI Amplifier Hifi Speaker System Control Unit Module 9143156 6960925

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Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

Part no. 8E0907307D

Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

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BMW E82 E88 E90 Switch Cluster Cruise Control Stalk Unit 6965279

Part no. 6965279

BMW E82 E88 E90 Switch Cluster Cruise Control Stalk Unit 6965279

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Volkswagen VW Polo 9N Negative Battery Terminal Ground Cable Wiring 6Q0971235

Part no. 6Q0971235

Volkswagen VW Polo 9N Negative Battery Terminal Ground Cable Wiring 6Q0971235

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BMW F30 F31 F32 Towing Hitch Trailer Hook Module Control Unit 6872319

Part no. 6872319

BMW F30 F31 F32 Towing Hitch Trailer Hook Module Control Unit 6872319

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BMW F10 F30 X1 F48 Mini F54 Rear Tailgate Smart Opener Top Wire Sensor 7391042

Part no. 7391042

BMW F10 F30 X1 F48 Mini F54 Rear Tailgate Smart Opener Top Wire Sensor 7391042

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MINI Cooper One R50 Control Unit For Radio Remote Control 433MHZ 4109140

Part no. 4109140

MINI Cooper One R50 Control Unit For Radio Remote Control 433MHZ 4109140

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Seat Leon Mk3 Door Module Control Unit Front Driver's Side Door 5Q4959593E

Part no. 5Q4959593E

Seat Leon Mk3 Door Module Control Unit Front Driver's Side Door 5Q4959593E

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Door Module Mercedes Vito W447 Rear Right O/S Door Control Unit A4479000101

Part no. A4479000101

Door Module Mercedes Vito W447 Rear Right O/S Door Control Unit A4479000101

Product currently unavailable

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Electronics Charging BMW E60 E87 E90 E91 Hands Free Module MULF2 9181378

Part no. 9181378

Electronics Charging BMW E60 E87 E90 E91 Hands Free Module MULF2 9181378

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Mini Cooper R50 R52 W10 116HP Engine ECU Kit DME 7557395 + EWS + Key Manual

Part no. 7557395-5

Mini Cooper R50 R52 W10 116HP Engine ECU Kit DME 7557395 + EWS + Key Manual

Product currently unavailable

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Mercedes W907 Battery Cable Alternator Wiring Loom Harness Cabling A9075404687

Part no. A9075404687

Mercedes W907 Battery Cable Alternator Wiring Loom Harness Cabling A9075404687

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Air Module Mercedes W639 W906 Control Unit ECU Air Sensor 0285011060

Part no. A9069014700

Air Module Mercedes W639 W906 Control Unit ECU Air Sensor 0285011060

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BMW E87 E90 E91 N46 120i 320i Engine DME 7561834 ECU KIT CAS2 + 2 Keys Manual

Part no. 7561834-9

BMW E87 E90 E91 N46 120i 320i Engine DME 7561834 ECU KIT CAS2 + 2 Keys Manual

Product currently unavailable

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3 x BMW E88 E89 E93 Convertible Cabrio DWA Alarm System Module 6989713

Part no. 6989713-2

3 x BMW E88 E89 E93 Convertible Cabrio DWA Alarm System Module 6989713

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Mercedes W221 Door Module Front Door Left N/S Control Module A0038206326

Part no. A0038206326

Mercedes W221 Door Module Front Door Left N/S Control Module A0038206326

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Mercedes ML W166 Diesel OM642 Engine Automatic Transmission Wiring Harness

Part no. A1665408909

Mercedes ML W166 Diesel OM642 Engine Automatic Transmission Wiring Harness

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Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A A0009067900

Part no. A0009067900-2

Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A A0009067900

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Seat Ibiza 6J Central Body Comfort BCM Interface Module 6C0937089D

Part no. 6C0937089D

Seat Ibiza 6J Central Body Comfort BCM Interface Module 6C0937089D

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Mercedes W204 W212 Fuse Box Relay Control Unit Electric SAM Module A2129009705

Part no. A2129009705-1

Mercedes W204 W212 Fuse Box Relay Control Unit Electric SAM Module A2129009705

Product currently unavailable

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Mercedes-Benz E-Class W210 Battery Positive Plus Cable Loom Harness A2105401930

Part no. A2105401930

Mercedes-Benz E-Class W210 Battery Positive Plus Cable Loom Harness A2105401930

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Mercedes Sprinter W906 OM646 Diesel Engine Wiring Harness Loom Cable A6461504233

Part no. A6461504233

Mercedes Sprinter W906 OM646 Diesel Engine Wiring Harness Loom Cable A6461504233

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BMW E81 E87 E90 PDC Parking Sensor Ultrasonic Carbonschwarz Black

Part no. 6951674-CAR

BMW E81 E87 E90 PDC Parking Sensor Ultrasonic Carbonschwarz Black

Product currently unavailable

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Mercedes C140 Body Control Comfort Unit Module BCM Unit ECU A0185458332

Part no. A0185458332

Mercedes C140 Body Control Comfort Unit Module BCM Unit ECU A0185458332

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Audi RS4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907064JJ

Part no. 8K0907064JJ

Audi RS4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907064JJ

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BMW E87 LCI E90 N43 116i 118i 320i DME Engine Control Unit 7583225

Part no. 7583225-9

BMW E87 LCI E90 N43 116i 118i 320i DME Engine Control Unit 7583225

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BMW 3 5 7 X3 X5 Series E46 E53 E60 E65 E83 M57N Starter Motor 2,0 KW 2344232

Part no. 2344232

BMW 3 5 7 X3 X5 Series E46 E53 E60 E65 E83 M57N Starter Motor 2,0 KW 2344232

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Audi A7 4G8 Westfalia Towing Hitch Module Control Unit 506737

Part no. 5DS011105

Audi A7 4G8 Westfalia Towing Hitch Module Control Unit 506737

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Audi Q7 4M Starter Motor Engine Diesel Valeo 06M911022D

Part no. 06M911022D

Audi Q7 4M Starter Motor Engine Diesel Valeo 06M911022D

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BMW X3 E83 LCI Battery Positive Lead Red Cable Plus Pole Wire 3414878

Part no. 3414878

BMW X3 E83 LCI Battery Positive Lead Red Cable Plus Pole Wire 3414878

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Mercedes W205 Control Unit Power Distribution Box Electrical A0009060086

Part no. A0009060086

Mercedes W205 Control Unit Power Distribution Box Electrical A0009060086

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Mercedes-Benz W906 Light Repeater Lamp Wiring Loom A0008201277

Part no. A0008201277

Mercedes-Benz W906 Light Repeater Lamp Wiring Loom A0008201277

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BMW F10 F11 On Board Display  Central Information Screen Monitor 10" 9243897

Part no. 9243897

BMW F10 F11 On Board Display Central Information Screen Monitor 10" 9243897

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Mercedes-Benz A C W169 W204 Battery Negative Earth Cable Wiring A2045421418

Part no. A2045421418

Mercedes-Benz A C W169 W204 Battery Negative Earth Cable Wiring A2045421418

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BMW E81 E87 LCI E90 E91 118i 318i N43 ECU Kit DME 7593666 + CAS3 + Key Manual

Part no. 7593666-1

BMW E81 E87 LCI E90 E91 118i 318i N43 ECU Kit DME 7593666 + CAS3 + Key Manual

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Mercedes Vito Viano W639 Battery Cable Positive Wiring Harness A6735460011

Part no. A6735460011

Mercedes Vito Viano W639 Battery Cable Positive Wiring Harness A6735460011

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Renault Scenic III 1.5 Dci Engine Alternator Generator 12V 120A 8200960533

Part no. 8200960533

Renault Scenic III 1.5 Dci Engine Alternator Generator 12V 120A 8200960533

Product currently unavailable

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Audi TT 8J Radio CD Player Professional Audio Concern Head Unit 9199439

Part no. 8J0035186M

Audi TT 8J Radio CD Player Professional Audio Concern Head Unit 9199439

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Audi A4 B8 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104C

Part no. 8K0971104C

Audi A4 B8 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104C

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Audi A4 B7 A6 C6 Alternator Generator 1.9 TDI Diesel 06F903023HX

Part no. 06F903023H

Audi A4 B7 A6 C6 Alternator Generator 1.9 TDI Diesel 06F903023HX

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BMW E82 Footwell Light Module Control Unit ECU BASIS PL2 FRM3R 9251487

Part no. 9251487

BMW E82 Footwell Light Module Control Unit ECU BASIS PL2 FRM3R 9251487

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Volkswagen VW LT 35 Diesel Engine Starter Motor Unit Napa 069911023LX

Part no. 069911023LX

Volkswagen VW LT 35 Diesel Engine Starter Motor Unit Napa 069911023LX

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Mini R50 R53 Fuse Relay Electrical Box Housing With Cover 1480790

Part no. 1480790-1

Mini R50 R53 Fuse Relay Electrical Box Housing With Cover 1480790

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BMW F20 F21 F30 F31 F32 BCM Body Control Unit Module REM 9329701

Part no. 9499001

BMW F20 F21 F30 F31 F32 BCM Body Control Unit Module REM 9329701

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Volkswagen VW Passat B7 Driver's Seat Control Unit Module ECU 3C8959760E

Part no. 3C8959760E

Volkswagen VW Passat B7 Driver's Seat Control Unit Module ECU 3C8959760E

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Audi A4 B8 Body Control Comfort Unit Module BCM Convenience Unit 8K0907063AD

Part no. 8K0907063AD

Audi A4 B8 Body Control Comfort Unit Module BCM Convenience Unit 8K0907063AD

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Ford Transit Mk8 VI Glow Plug Controller Unit Module Relay GK2112B533AA

Part no. GK2112B533AA

Ford Transit Mk8 VI Glow Plug Controller Unit Module Relay GK2112B533AA

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Airbag Module Mercedes W207 C207 Coupe Air Bag SRS Control Unit ECU A2079014200

Part no. A2079014200

Airbag Module Mercedes W207 C207 Coupe Air Bag SRS Control Unit ECU A2079014200

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Mini Cooper R57 PL3 SPEG H4 Fuse Distribution Box 3455533

Part no. 3455533

Mini Cooper R57 PL3 SPEG H4 Fuse Distribution Box 3455533

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Audi A1 S1 8X Fuse Box Relay Top Upper Cover Cap Flap 6C0937132C

Part no. 6C0937132C

Audi A1 S1 8X Fuse Box Relay Top Upper Cover Cap Flap 6C0937132C

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BMW E81 Footwell ECU Light Control Module MAX Kuester FRM3R PL2 9308364

Part no. 9308364

BMW E81 Footwell ECU Light Control Module MAX Kuester FRM3R PL2 9308364

Product currently unavailable

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BMW E46 M3 Z4 E85 M3.2 Engine Starter Motor Valeo 7834214

Part no. 7835735

BMW E46 M3 Z4 E85 M3.2 Engine Starter Motor Valeo 7834214

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BMW X3 E83 Steering Control Module Unit Servo SVT Servotronic 3404171

Part no. 3404171

BMW X3 E83 Steering Control Module Unit Servo SVT Servotronic 3404171

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Audi A4 B8 A5 8T A6 C7 Q5 8R Fuse Box Relay Module Connector Plug 8K0937501

Part no. 8K0937501

Audi A4 B8 A5 8T A6 C7 Q5 8R Fuse Box Relay Module Connector Plug 8K0937501

Product currently unavailable

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Parktronic Module Mercedes W211 PDC Parking Sensors Control Unit A2115459232

Part no. A2115459232

Parktronic Module Mercedes W211 PDC Parking Sensors Control Unit A2115459232

Product currently unavailable

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Engine Wiring BMW F46 Mini F56 B47 Loom Harness Injection Valve Ignition 8516253

Part no. 8516253

Engine Wiring BMW F46 Mini F56 B47 Loom Harness Injection Valve Ignition 8516253

Product currently unavailable

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Ford Focus Mk3 Rear Door Cable Wiring Harness Loom Left N/S F1ET-14240-LBG

Part no. F1ET-14240-LBG

Ford Focus Mk3 Rear Door Cable Wiring Harness Loom Left N/S F1ET-14240-LBG

Product currently unavailable

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MINI Cooper R55 LCI Footwell Light Module Unit High EKS PL3 FRM3R 3456952

Part no. 3456952

MINI Cooper R55 LCI Footwell Light Module Unit High EKS PL3 FRM3R 3456952

Product currently unavailable

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Mercedes W211 Body Control Module BCM Comfort Module Unit A2115453532

Part no. A2115453532

Mercedes W211 Body Control Module BCM Comfort Module Unit A2115453532

Product currently unavailable

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Volkswagen Polo 5 6R 1.2 TSI CJZC 90HP ECU Engine Control 04E907309AF

Part no. 04E907309AF

Volkswagen Polo 5 6R 1.2 TSI CJZC 90HP ECU Engine Control 04E907309AF

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Skoda Octavia 5E MMI Multimedia Interface Unit Module Control ECU 5E0035842A

Part no. 5E0035842A

Skoda Octavia 5E MMI Multimedia Interface Unit Module Control ECU 5E0035842A

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Door Module Mercedes C219 Front Left Door N/S Control Unit Module A2198200626

Part no. A2198200626

Door Module Mercedes C219 Front Left Door N/S Control Unit Module A2198200626

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BMW F10 F20 F30 Petrol N20 Wiring Harness Motor Sensor System 2 Module

Part no. 7641661-2

BMW F10 F20 F30 Petrol N20 Wiring Harness Motor Sensor System 2 Module

Product currently unavailable

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Audi A4 B8 A5 8T A6 C6 Battery Negative Terminal Cable Wiring Wire 8K0915181

Part no. 8K0915181

Audi A4 B8 A5 8T A6 C6 Battery Negative Terminal Cable Wiring Wire 8K0915181

Product currently unavailable

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Audi TT 8J 2.0 TFSI CESA Petrol Engine Starter Motor 02E911023S

Part no. 02E911023S

Audi TT 8J 2.0 TFSI CESA Petrol Engine Starter Motor 02E911023S

Product currently unavailable

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Mercedes W176 Front Crash Impact Airbag Sensor Pressure Sensor Unit A1769051000

Part no. A1769051000-1

Mercedes W176 Front Crash Impact Airbag Sensor Pressure Sensor Unit A1769051000

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Battery Cable BMW X3 G01 X4 G02 Diesel Alternator Starter Positive Cable 8476016

Part no. 8476016

Battery Cable BMW X3 G01 X4 G02 Diesel Alternator Starter Positive Cable 8476016

Product currently unavailable

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BMW F20 F21 F22 F30 F32 Front Electronic Module Control Unit FEM 9868386

Part no. 9868386

BMW F20 F21 F22 F30 F32 Front Electronic Module Control Unit FEM 9868386

Product currently unavailable

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On Board Monitor BMW E60 E63 E90 Dashboard Display Screen 8.8" 9114362

Part no. 9114362

On Board Monitor BMW E60 E63 E90 Dashboard Display Screen 8.8" 9114362

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Mercedes W639 W906 Battery Terminal Fuse Box Control Unit Module A6385454440

Part no. A6385454440

Mercedes W639 W906 Battery Terminal Fuse Box Control Unit Module A6385454440

Product currently unavailable

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BMW 5 E60 E61 Wiring Loom Harness Co-Drivers Passengers Side 6982360

Part no. 6972577

BMW 5 E60 E61 Wiring Loom Harness Co-Drivers Passengers Side 6982360

Product currently unavailable

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BMW X3 E83 LCI Fuse Box Grouping Map Diagram Location 3428544

Part no. 3428544

BMW X3 E83 LCI Fuse Box Grouping Map Diagram Location 3428544

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Volkswagen Golf Mk7 1.4 TSI CXSA Engine Control Unit ECU 04E907309A Automatic

Part no. 04E907309A

Volkswagen Golf Mk7 1.4 TSI CXSA Engine Control Unit ECU 04E907309A Automatic

Product currently unavailable

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Head Unit BMW F10 F20 F30 Basis Media Navigation Headunit 9357991

Part no. 9357991

Head Unit BMW F10 F20 F30 Basis Media Navigation Headunit 9357991

Product currently unavailable

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Mercedes-Benz A-Class W169 CD Player Radio Stereo Head Unit A1698700289

Part no. A1698700289

Mercedes-Benz A-Class W169 CD Player Radio Stereo Head Unit A1698700289

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Renault Relay III Unit Module 4 Pins 12V 8200263345

Part no. 8200263345

Renault Relay III Unit Module 4 Pins 12V 8200263345

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BMW E60 E87 E90 E91 E92 CAS 3 ECU Control Unit Key Reading Module 9226238

Part no. 9226238-1

BMW E60 E87 E90 E91 E92 CAS 3 ECU Control Unit Key Reading Module 9226238

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Mercedes W639 Vito 111 CDI OM646 Engine Unit Module ECU A6461532591 Manual

Part no. A6461532591

Mercedes W639 Vito 111 CDI OM646 Engine Unit Module ECU A6461532591 Manual

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Alternator Generator Mercedes W211 W220 R230 M112 Bosch 150A A0121541302

Part no. A0121541302

Alternator Generator Mercedes W211 W220 R230 M112 Bosch 150A A0121541302

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BMW E87 LCI E90 120i 320i  N43 170HP ECU Kit DME 7595179 CAS3 + Key Manual

Part no. 7595179-6

BMW E87 LCI E90 120i 320i N43 170HP ECU Kit DME 7595179 CAS3 + Key Manual

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BMW G11 G12 G30 G32 G14 Starter Cable Alternator Cable Starter-Base B+ 8595355

Part no. 8595355

BMW G11 G12 G30 G32 G14 Starter Cable Alternator Cable Starter-Base B+ 8595355

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Opel Combo Steering Column Power Steering Control Unit Module ECU 13136672

Part no. 13136672

Opel Combo Steering Column Power Steering Control Unit Module ECU 13136672

Product currently unavailable

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Kia Sportage 3 1.7 Diesel Engine Starter Motor Denso 36100-2A550

Part no. 36100-2A550

Kia Sportage 3 1.7 Diesel Engine Starter Motor Denso 36100-2A550

Product currently unavailable

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Mercedes Vito W639 OM651.940 Diesel Engine Wiring Cable Loom Harness A6511501488

Part no. A6511501488

Mercedes Vito W639 OM651.940 Diesel Engine Wiring Cable Loom Harness A6511501488

Product currently unavailable

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Mercedes CL203 CLC Head Unit CD Player Radio Audio Controller Unit A2038703594

Part no. A2038703594

Mercedes CL203 CLC Head Unit CD Player Radio Audio Controller Unit A2038703594

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Key components of vehicle electrical systems

Original electrical parts for popular car brands

A car's electrical system is a complex system responsible for many key functions—from engine starting to lighting and on-board electronics. Modern cars are equipped with increasingly advanced electrical solutions that not only improve driving comfort but also enhance safety. At the Global Parts automotive store you will find a wide range of used car parts , such as alternators, starters, batteries, control modules and other automotive electrical systems that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini and many others.

How does a car's electrical system work?

A car's electrical system is a complex system that consists of several key components that work together to ensure the vehicle's reliable operation:

  • Battery accessories – Includes clamps, cables, holders and other components necessary for battery installation and maintenance.
  1. Electronic control modules and controllers – They control and manage the operation of various vehicle systems, such as the engine, air conditioning and ABS.
  2. Alternators and generators – Responsible for generating electricity and charging the battery while the engine is running.
  3. Parts for alternators and generators – Including voltage regulators, brushes and bearings that ensure proper operation of the alternator.
  4. Starters – Key components of the starting system that enable the engine to be started.
  5. Starter parts – Including bendixes, rotors and solenoids necessary for the proper operation of the starter.
  6. Batteries – They store the electrical energy necessary to start the engine and power on-board systems.
  7. Wires, harnesses and connectors – They transmit energy and electrical signals between various vehicle systems.
  8. Fuses and fuse boxes – Protect the electrical system against overloads and short circuits.
  9. Relays – They control the flow of current in individual electrical circuits of the vehicle. A functioning electrical system is the basis for the reliability of your car, regardless of operating conditions.

Key technical parameters of electrical systems

Each of these components has specific technical parameters that determine its compatibility with the vehicle. For example, alternators installed in mid-range cars (e.g., Volkswagen Passat B6) typically have a capacity of 90 A to 140 A, while luxury vehicles (e.g., Mercedes S-Class) require alternators with a capacity exceeding 180 A. Starter motors vary in torque and operating voltage – the standard is 12 V, while 24 V starters are used in heavy-duty vehicles.

Why is it worth taking care of your car's electrical system?

Regular maintenance and replacement of electrical system components is key to reliability and road safety. Faulty components can lead to:

  • Problems starting the engine.
  • Failure of safety systems such as ABS or airbags.
  • Decreased efficiency of on-board equipment, e.g. lighting or air conditioning. At the Global Parts store we offer original used car parts , which have undergone detailed quality tests, ensuring their full functionality.

Symptoms of electrical system disruptions

In practice, electrical faults manifest themselves in a variety of ways. Drivers most often notice: dimming lights when parked, difficulty starting the engine, a voltage drop on the on-board computer, or air conditioning malfunctions. The table below presents typical correlations:

SymptomPossible causeItem to check
Difficulty starting the engineWorn out starter or batteryStarter motor, battery
Dimming the lightsInefficient alternatorAlternator, voltage regulator
Electric windows not workingDamaged relays or harnessRelays, wires

How to choose the right parts for your electrical system?

When choosing parts for the electrical system, such as alternators, starters or control modules, it is worth paying attention to:

  • Vehicle-specific fit – Every car make and model requires specific specifications. At Global Parts, you'll find parts that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini, and many more .
  • Technical condition – All used parts we offer are thoroughly checked to ensure their reliability.
  • Technical parameters – For example, alternators should have appropriate current output, adapted to the needs of your vehicle.

Compatibility and fit

The selection of electrical parts is based primarily on OEM part numbers, but matching them to specific parameters is equally important, including current, voltage, and the number of connector pins. For example, the 120A alternator used in the Audi A4 B7 differs significantly from the 150A version installed in the Audi A6 C6 . Therefore, using manufacturer catalogs or providing the VIN makes finding the right component much easier.

Why choose used electrical parts?

Purchase of used car parts This solution allows you to combine savings with quality. Why choose it?

  • Lower costs – Used alternators, starters and other parts are cheaper than new ones, but offer the same high quality.
  • Ecology – You support recycling and reduce waste by choosing used car parts .
  • Wide range – We offer electrical parts for the most popular car brands, so you can easily find what you need.

How to take care of your car's electrical system?

To ensure your electrical system operates reliably for years, it is worth remembering a few rules:

  • Regularly check the battery condition and charge level.
  • Take care of your cables and connectors – corrosion or damage can lead to voltage drops and failures.
  • Monitor the operation of the alternator and starter – early detection of problems will help avoid more serious breakdowns. If you have any problems, you will find the right car parts at Global Parts that will help restore your vehicle to full working order.

Step-by-step control procedures

  1. Measure the battery voltage with a multimeter – the resting value should be approximately 12.6 V.
  2. Check the charging voltage with the engine running – the correct range is 13.8–14.5 V.
  3. Assess the condition of the wires and terminals – lack of corrosion and a firm seat are essential.
  4. If in doubt, check the quiescent current consumption – it should not exceed 0.05–0.08 A.

FAQ - Frequently asked questions about electrical systems in cars

QuestionAnswer
What is a car electrical system?This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.
What is an alternator for in a car?The alternator generates electrical current when the engine is running and charges the battery.
What is the difference between a starter and an alternator?The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.
How to check if the battery is working?Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.
What are the most common symptoms of car electrical failure?Problems starting the engine, flashing warning lights, power windows not working or dimming lights.
Do electrical parts from one model fit another?Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.
How often should you check your electrical system?It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Summary: Automotive electrical systems at Global Parts Automotive Store

Automotive electrical systems are the foundation of the reliability and comfort of every modern vehicle. By choosing the right parts, such as alternators, batteries, and control modules, you can ensure your car's full operational efficiency. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , or others, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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