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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BMW E60 E90 Dashboard Dash Onboard Display Monitor Screen 8.8" CCC 9151979

Part no. 9151979-2

BMW E60 E90 Dashboard Dash Onboard Display Monitor Screen 8.8" CCC 9151979

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Engine Wiring BMW E70 E71 M57N2 Module Injector Loom Harness Cables 7799662

Part no. rhd-7799662

Engine Wiring BMW E70 E71 M57N2 Module Injector Loom Harness Cables 7799662

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Mini R57 LCI R59 Convertible Airbag ECU Control Unit Module 9809353

Part no. 9809353

Mini R57 LCI R59 Convertible Airbag ECU Control Unit Module 9809353

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BMW 1 Series E81 Footwell ECU Light Control Module LOW PL2 FRM II Lear 9197162

Part no. 9197162

BMW 1 Series E81 Footwell ECU Light Control Module LOW PL2 FRM II Lear 9197162

Product currently unavailable

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Audio Amplifier BMW F20 F21 Mini F55 F56 Top Hifi Harman Kardon Unit 9353990

Part no. 9353990

Audio Amplifier BMW F20 F21 Mini F55 F56 Top Hifi Harman Kardon Unit 9353990

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BMW 5 Series F10 Light Control Footwell Module ECU Unit FRM3 9250454

Part no. 9250454

BMW 5 Series F10 Light Control Footwell Module ECU Unit FRM3 9250454

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BMW E60 Dashboard Dash Onboard Display Monitor Screen 8.8" CCC

Part no. 9114356

BMW E60 Dashboard Dash Onboard Display Monitor Screen 8.8" CCC

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Radio Player BMW F10 F11 F20 F21 F25 F30 F31 Alpine CD Champ 2 Head Unit 9311296

Part no. 9311296

Radio Player BMW F10 F11 F20 F21 F25 F30 F31 Alpine CD Champ 2 Head Unit 9311296

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BMW F10 Central Gateway Module ECU Control Unit LEAR ZGW-02 4SK 9291450

Part no. 9291450

BMW F10 Central Gateway Module ECU Control Unit LEAR ZGW-02 4SK 9291450

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Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9268752

Part no. 9268752

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9268752

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Audio Amplifier BMW F10 F11 F12 F13 Harman Kardon Top HIFI Sound Unit 9261703

Part no. 9261703

Audio Amplifier BMW F10 F11 F12 F13 Harman Kardon Top HIFI Sound Unit 9261703

Product currently unavailable

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Mercedes W169 W245 A B 160 180 200 CDI OM640 Alternator Generator A6401540502

Part no. A6401540502

Mercedes W169 W245 A B 160 180 200 CDI OM640 Alternator Generator A6401540502

Product currently unavailable

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Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465403803

Part no. A2465403803

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465403803

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Mercedes S205 C205 SAM Module Rear Body Comfort Control Unit ECU A2229006014

Part no. A2229006014

Mercedes S205 C205 SAM Module Rear Body Comfort Control Unit ECU A2229006014

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BMW F46 KaFAS Camera Front Windscreen Parking Camera Module Unit 9384687

Part no. 9384687

BMW F46 KaFAS Camera Front Windscreen Parking Camera Module Unit 9384687

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Mercedes Vito W639 Cover Fuse Box Battery Trim Panel Lid A6395450003

Part no. A6395450003

Mercedes Vito W639 Cover Fuse Box Battery Trim Panel Lid A6395450003

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Starter Motor Mercedes W204 W212 C63 E63 AMG M156 Engine Starter A0061516501

Part no. rhd-A0061516501

Starter Motor Mercedes W204 W212 C63 E63 AMG M156 Engine Starter A0061516501

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BMW X5 Series E53 3.0i M54 Wiring Loom Harness Engine Ignition Module 7506846

Part no. rhd-7506846

BMW X5 Series E53 3.0i M54 Wiring Loom Harness Engine Ignition Module 7506846

Product currently unavailable

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BMW 3 X1 Series E84 E90 E91 LCI Petrol Instrument Cluster Speedo Clocks 6983494

Part no. 6983494

BMW 3 X1 Series E84 E90 E91 LCI Petrol Instrument Cluster Speedo Clocks 6983494

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Mercedes W906 313 CDI OM651.955 129HP Diesel Engine ECU Kit A6519000700 Key Lock

Part no. A6519000700-2

Mercedes W906 313 CDI OM651.955 129HP Diesel Engine ECU Kit A6519000700 Key Lock

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BMW E81 E87 E90 E91 Radio BMW Business CD Player Control Unit 9141682

Part no. 9141682-2

BMW E81 E87 E90 E91 Radio BMW Business CD Player Control Unit 9141682

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BMW 5 Series E61 E61N LCI IBS Negative Battery Lead Cable 9132250 9215950

Part no. 9132250

BMW 5 Series E61 E61N LCI IBS Negative Battery Lead Cable 9132250 9215950

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Mercedes W204 Display Screen Radio Multimedia Navigation Sat Unit A1729016600

Part no. A1729016600

Mercedes W204 Display Screen Radio Multimedia Navigation Sat Unit A1729016600

Product currently unavailable

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Navigation Screen Mercedes W212 1 Head Unit Sat Nav Center Display A2129005000

Part no. A2129005000-1

Navigation Screen Mercedes W212 1 Head Unit Sat Nav Center Display A2129005000

Product currently unavailable

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Mercedes W164 Tailgate Boot Lid Control Unit Module A1648702726

Part no. A1648702726

Mercedes W164 Tailgate Boot Lid Control Unit Module A1648702726

Product currently unavailable

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£BMW 3 5 Series E60 E90 325i 525i N53 ECU Kit DME CAS3 + Key 7588620 Automatic

Part no. 7588620-3

£BMW 3 5 Series E60 E90 325i 525i N53 ECU Kit DME CAS3 + Key 7588620 Automatic

Product currently unavailable

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BMW F23 REM Rear Electronic Module Fuse Box Control Unit V2 9374507

Part no. 9374507

BMW F23 REM Rear Electronic Module Fuse Box Control Unit V2 9374507

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Mercedes SLK R171 Fuse Box Relay Control Unit Electric Module SAM A1715451601

Part no. A1715451601

Mercedes SLK R171 Fuse Box Relay Control Unit Electric Module SAM A1715451601

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BMW Z4 Series E85 Driver's Side Door Airbag Control Unit Module 6935920

Part no. 6935920

BMW Z4 Series E85 Driver's Side Door Airbag Control Unit Module 6935920

Product currently unavailable

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Mercedes ML W164 Gateway Control Unit Gateway Module ECU A1645406745

Part no. A1649002901

Mercedes ML W164 Gateway Control Unit Gateway Module ECU A1645406745

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BMW F20 F21 F30 116i 316i N13 Engine ECU KIT DME 8614302 + FEM + Key + Lock

Part no. 8614302-1

BMW F20 F21 F30 116i 316i N13 Engine ECU KIT DME 8614302 + FEM + Key + Lock

Product currently unavailable

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Display Screen BMW F20 F21 F22 Central Information Infotainment 8,8" 9387548

Part no. 9292246

Display Screen BMW F20 F21 F22 Central Information Infotainment 8,8" 9387548

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BMW 1 3 5 Series F10 F20 F30 VDC Rear M Sport Suspension Control Unit Module

Part no. 6888037

BMW 1 3 5 Series F10 F20 F30 VDC Rear M Sport Suspension Control Unit Module

Product currently unavailable

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BMW X1 E84 ECU Footwell Light Module BASIS PL2 FRM3R Lear 9230451

Part no. 9230451-1

BMW X1 E84 ECU Footwell Light Module BASIS PL2 FRM3R Lear 9230451

Product currently unavailable

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BMW E60 LCI E90 325d 525d M57N2 ECU Engine Control Unit DDE 7811151 Automatic

Part no. 7811151

BMW E60 LCI E90 325d 525d M57N2 ECU Engine Control Unit DDE 7811151 Automatic

Product currently unavailable

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BMW 5 Series E61 LCI Light Control Module Unit Lear LM II E6X LWR 9180756

Part no. 9180756

BMW 5 Series E61 LCI Light Control Module Unit Lear LM II E6X LWR 9180756

Product currently unavailable

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BMW E60 Light Control Unit Module LM E6X Lear 6948578

Part no. 6948578

BMW E60 Light Control Unit Module LM E6X Lear 6948578

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BMW X5 Series E53 GM III General Body Control Module Unit ECU Lear 6940923

Part no. 6940923

BMW X5 Series E53 GM III General Body Control Module Unit ECU Lear 6940923

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BMW 5 6 Series E60 E61 E63 E64 6-disc Compact CD Changer 6941416

Part no. 6941416

BMW 5 6 Series E60 E61 E63 E64 6-disc Compact CD Changer 6941416

Product currently unavailable

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BMW X5 E53 3.0d M57N 218HP ECU Control Unit Module DDE 7800131 Automatic

Part no. 7800131

BMW X5 E53 3.0d M57N 218HP ECU Control Unit Module DDE 7800131 Automatic

Product currently unavailable

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Mercedes-Benz A C W169 W204 Battery Negative Earth Cable Wiring A2045420818

Part no. A2045420818

Mercedes-Benz A C W169 W204 Battery Negative Earth Cable Wiring A2045420818

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BMW F10 Tailgate Module Rear Boot Trunk Lid Control Unit ECU 7317512

Part no. 7317512

BMW F10 Tailgate Module Rear Boot Trunk Lid Control Unit ECU 7317512

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Mini Cooper R55 R56 R57 Petrol N12 DME 7640005 Engine Control Unit ECU

Part no. 7640005

Mini Cooper R55 R56 R57 Petrol N12 DME 7640005 Engine Control Unit ECU

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Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450301

Part no. A6395450301-1

Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450301

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BMW 5 6 Series E60 E63 E64 Body Control Module ECU Control Unit 6945029

Part no. 6945029

BMW 5 6 Series E60 E63 E64 Body Control Module ECU Control Unit 6945029

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BMW E87 E90 118i 318i Engine N46 129HP ECU KIT DME 7561834 CAS2 + Key Automatic

Part no. 7561834-18

BMW E87 E90 118i 318i Engine N46 129HP ECU KIT DME 7561834 CAS2 + Key Automatic

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BMW E60 E64 LCI Body Gateway Module ECU Control Unit KGM E6X High D-Can 9176079

Part no. 9176079

BMW E60 E64 LCI Body Gateway Module ECU Control Unit KGM E6X High D-Can 9176079

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Steering Lock Mercedes W176 W246 Control Unit Module VST A0999000400

Part no. A0999000400

Steering Lock Mercedes W176 W246 Control Unit Module VST A0999000400

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Mini Cooper One F54 F55 F56 F57 F60 Starter Motor Engine Petrol 8658275

Part no. 8658275

Mini Cooper One F54 F55 F56 F57 F60 Starter Motor Engine Petrol 8658275

Product currently unavailable

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BMW E60 LCI E90 335d 535d M57N2 286HP Engine Control Unit ECU 7810980 Automatic

Part no. 7810980

BMW E60 LCI E90 335d 535d M57N2 286HP Engine Control Unit ECU 7810980 Automatic

Product currently unavailable

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BMW X5 E70 Front Bumper PDC Parking Sensor Wiring Loom Cable Harness 8039827

Part no. 8039827

BMW X5 E70 Front Bumper PDC Parking Sensor Wiring Loom Cable Harness 8039827

Product currently unavailable

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Trunk Lid Module BMW F31 F15 F16 F36 Control Unit Rear Tailgate Lift 7314798

Part no. 7314798

Trunk Lid Module BMW F31 F15 F16 F36 Control Unit Rear Tailgate Lift 7314798

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BMW X5 E70 X6 E71 Module Control Unit Trunk LidRear Tailgate Lift 7317419

Part no. 7335274

BMW X5 E70 X6 E71 Module Control Unit Trunk LidRear Tailgate Lift 7317419

Product currently unavailable

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Gateway Module Audi A3 8P Volkswagen Tiguan Central Control Unit ECU 7N0907530N

Part no. 7N0907530N

Gateway Module Audi A3 8P Volkswagen Tiguan Central Control Unit ECU 7N0907530N

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BMW 5 Series E61 Touring Body Control Module ECU Control Unit High 9114448

Part no. 9114448

BMW 5 Series E61 Touring Body Control Module ECU Control Unit High 9114448

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Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav GPS Unit High 9387565

Part no. 6826790-1

Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav GPS Unit High 9387565

Product currently unavailable

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Audi A7 4G Q7 4L 3.0 TDI Glow Plug Pre Heat 651 Relay Unit 9 Pins 4L0907282A

Part no. 4L0907282A

Audi A7 4G Q7 4L 3.0 TDI Glow Plug Pre Heat 651 Relay Unit 9 Pins 4L0907282A

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BMW 1 3 Series F20 F21 F30 LCI Starter Motor Engine 8621840

Part no. 8621840

BMW 1 3 Series F20 F21 F30 LCI Starter Motor Engine 8621840

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Mini Cooper S R55 R56 R57 N14 1.6 ECU Basic Control Unit DME 7587548 Manual

Part no. 7587548-3

Mini Cooper S R55 R56 R57 N14 1.6 ECU Basic Control Unit DME 7587548 Manual

Product currently unavailable

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Mini Cooper S R56 N14 1.6 174HP ECU Kit DME CAS 3 Key 7610009 Manual

Part no. 7610009-1

Mini Cooper S R56 N14 1.6 174HP ECU Kit DME CAS 3 Key 7610009 Manual

Product currently unavailable

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BMW 5 6 7 E60 E61 E63 E64 E65 PDC Parking Control Module Unit ECU 6922785

Part no. 6922785

BMW 5 6 7 E60 E61 E63 E64 E65 PDC Parking Control Module Unit ECU 6922785

Product currently unavailable

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BMW E81 E87 LCI 116i 1.6 Petrol N43 122HP ECU Kit DME 7599881 CAS3 Key Manual

Part no. 7599881-6

BMW E81 E87 LCI 116i 1.6 Petrol N43 122HP ECU Kit DME 7599881 CAS3 Key Manual

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BMW E81 E87 E90 LCI Professional Navigation Car Radio Player CIC 9273188

Part no. 9273188

BMW E81 E87 E90 LCI Professional Navigation Car Radio Player CIC 9273188

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Audi A6 C6 Head Unit Media Player Controller Knob Switch Panel 4F2919611H

Part no. rhd-4F2919611H

Audi A6 C6 Head Unit Media Player Controller Knob Switch Panel 4F2919611H

Product currently unavailable

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Mercedes CLK C209 Fuse Box Relay SAM Module Control Unit A2095452001

Part no. A2095452001

Mercedes CLK C209 Fuse Box Relay SAM Module Control Unit A2095452001

Product currently unavailable

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Mercedes W204 C180 Engine Unit BlueEFFICIENCY 271.820 156HP ECU A2711500391

Part no. A2711500391-7

Mercedes W204 C180 Engine Unit BlueEFFICIENCY 271.820 156HP ECU A2711500391

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BMW X3 F25 X4 F26 Dashboard Monitor Onboard Central Display Screen 6,5" 9269020

Part no. 9269020

BMW X3 F25 X4 F26 Dashboard Monitor Onboard Central Display Screen 6,5" 9269020

Product currently unavailable

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Mercedes W203 W204 Diesel Engine Starter Motor A0061512501

Part no. A0061512501

Mercedes W203 W204 Diesel Engine Starter Motor A0061512501

Product currently unavailable

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Mini Cooper R56 Footwell Light Module High EKS ECU PL3 FRM3R 3456051

Part no. 3456051-4

Mini Cooper R56 Footwell Light Module High EKS ECU PL3 FRM3R 3456051

Product currently unavailable

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Voltage Converter Mercedes W213 S213 Module Auxiliary Battery Unit A2059052809

Part no. A2059052809

Voltage Converter Mercedes W213 S213 Module Auxiliary Battery Unit A2059052809

Product currently unavailable

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Mercedes W203 W204 W211 Automatic Gearbox Transmission Control Unit A0034464110

Part no. A0034464110

Mercedes W203 W204 W211 Automatic Gearbox Transmission Control Unit A0034464110

Product currently unavailable

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Mercedes-Benz X156 Front Bumper Pressure Crash Impact Sensor A1569056800

Part no. A1569056800

Mercedes-Benz X156 Front Bumper Pressure Crash Impact Sensor A1569056800

Product currently unavailable

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BMW 1 3 5 Series E60 E81 E87 E90 Snap-in Adapter Basic Telephone NOKIA 6230I

Part no. 6973983

BMW 1 3 5 Series E60 E81 E87 E90 Snap-in Adapter Basic Telephone NOKIA 6230I

Product currently unavailable

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BMW E60 E61 E63 E64 6-disc Compact CD Changer with Magazine 6956939

Part no. 6956939

BMW E60 E61 E63 E64 6-disc Compact CD Changer with Magazine 6956939

Product currently unavailable

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Mini Cooper F55 F56 F57 Visual Boost Surround Central Cover Instrument 9367673

Part no. 9367673

Mini Cooper F55 F56 F57 Visual Boost Surround Central Cover Instrument 9367673

Product currently unavailable

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BMW F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Estoril Blue 2

Part no. 9261599

BMW F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Estoril Blue 2

Product currently unavailable

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BMW E92 Xenon Footwell Light Module Control Unit ECU FRMFA 9126314

Part no. 9126314

BMW E92 Xenon Footwell Light Module Control Unit ECU FRMFA 9126314

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BMW Z4 E89 Roadster Control Unit EMF Rear Wheel Brake Module 6794260

Part no. 6862244

BMW Z4 E89 Roadster Control Unit EMF Rear Wheel Brake Module 6794260

Product currently unavailable

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BMW 3 Series E90 E91 LCI 325i N53 218HP ECU Kit DME CAS3   Key 7592080 Manual

Part no. 7592080-1

BMW 3 Series E90 E91 LCI 325i N53 218HP ECU Kit DME CAS3 Key 7592080 Manual

Product currently unavailable

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Mercedes W176 W246 Comfort Module Central Gateway Control Unit VST A1769001101

Part no. A1769001101

Mercedes W176 W246 Comfort Module Central Gateway Control Unit VST A1769001101

Product currently unavailable

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BMW F45 F46 Mini F60 Sensor For Pedestrian Protection PTS Control Unit 9354289

Part no. 9354289

BMW F45 F46 Mini F60 Sensor For Pedestrian Protection PTS Control Unit 9354289

Product currently unavailable

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BMW 2 X1 Series F45 F48 Mini F55 F56 F60 Airbag Control Unit Module ECU 9390578

Part no. 9390578

BMW 2 X1 Series F45 F48 Mini F55 F56 F60 Airbag Control Unit Module ECU 9390578

Product currently unavailable

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BMW X3 X5 Z4 E53 E83 E85 6-Disc CD Changer Multichanger With Magazine 6913389

Part no. 6913389-1

BMW X3 X5 Z4 E53 E83 E85 6-Disc CD Changer Multichanger With Magazine 6913389

Product currently unavailable

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BMW Mini Cooper One R52 Body Control Unit Basic Module BCM 6968827

Part no. 6968827

BMW Mini Cooper One R52 Body Control Unit Basic Module BCM 6968827

Product currently unavailable

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BMW E60 E61 Rear PDC Parking Sensor Mysticblau Mystic Blau Blue 7115654

Part no. 7115654

BMW E60 E61 Rear PDC Parking Sensor Mysticblau Mystic Blau Blue 7115654

Product currently unavailable

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BMW F22 F23 Active Front Bumper Sensor Pedestrian Protection Unit 9196020

Part no. 9196020

BMW F22 F23 Active Front Bumper Sensor Pedestrian Protection Unit 9196020

Product currently unavailable

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BMW F10 F11 F12 Central Gateway Module ECU Control Unit Lear ZGW-02 High 9267514

Part no. 9267514

BMW F10 F11 F12 Central Gateway Module ECU Control Unit Lear ZGW-02 High 9267514

Product currently unavailable

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BMW E60 LCI E90 E92 330d 530d M57N2 Engine Control Unit ECU DDE 7810950 Manual

Part no. 7810950

BMW E60 LCI E90 E92 330d 530d M57N2 Engine Control Unit ECU DDE 7810950 Manual

Product currently unavailable

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BMW 7 Series E65 E66 Positive Battery Cable Plus Pole Petrol 6904903

Part no. 6904903

BMW 7 Series E65 E66 Positive Battery Cable Plus Pole Petrol 6904903

Product currently unavailable

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BMW 5 Series F11 Footwell Light Module ECU Control Unit FRM III TEMIC 9273629

Part no. 9273629

BMW 5 Series F11 Footwell Light Module ECU Control Unit FRM III TEMIC 9273629

Product currently unavailable

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Mini Cooper S R56 LCI N18 184HP ECU Kit Control Unit DME 7613226 CAS Key Manual

Part no. 7613226-1

Mini Cooper S R56 LCI N18 184HP ECU Kit Control Unit DME 7613226 CAS Key Manual

Product currently unavailable

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BMW X3 Series E83 3.0i M54 Automatic Gearbox Basic Control Unit EGS 7532988

Part no. 7532988

BMW X3 Series E83 3.0i M54 Automatic Gearbox Basic Control Unit EGS 7532988

Product currently unavailable

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Fuse Box Mercedes W212 Control Unit Power Distribution Electrical A2125407050

Part no. A2125407050

Fuse Box Mercedes W212 Control Unit Power Distribution Electrical A2125407050

Product currently unavailable

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BMW E90 E91 E92 E93 LCI Diesel N57 Alternator 150A 7808073 7805432

Part no. 7808073

BMW E90 E91 E92 E93 LCI Diesel N57 Alternator 150A 7808073 7805432

Product currently unavailable

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BMW E90 Max Brose Footwell Light Module Control Unit FRM3R 9263803

Part no. 9263803-2

BMW E90 Max Brose Footwell Light Module Control Unit FRM3R 9263803

Product currently unavailable

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Mini Cooper R55 R56 LCI Cable Set EPS Power Steering Wiring Harness 9137405

Part no. rhd-9137405

Mini Cooper R55 R56 LCI Cable Set EPS Power Steering Wiring Harness 9137405

Product currently unavailable

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Mercedes-Benz CLC-Class CL203 Antenna Amplifier Rear Right O/S A2038270642

Part no. A2038270642

Mercedes-Benz CLC-Class CL203 Antenna Amplifier Rear Right O/S A2038270642

Product currently unavailable

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BMW F20 F21 F22 F30 F31 Alpine CD Radio Player Head Control Unit 9331597

Part no. 9331597

BMW F20 F21 F22 F30 F31 Alpine CD Radio Player Head Control Unit 9331597

Product currently unavailable

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Audi A7 4G8 Dashboard MMI Multimedia Display Monitor Screen 4G2919601T

Part no. RHD-4G2919601T

Audi A7 4G8 Dashboard MMI Multimedia Display Monitor Screen 4G2919601T

Product currently unavailable

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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