What is the construction and purpose of automotive electrical systems?

Automotive electrical systems are a set of components responsible for starting, charging, powering consumers, and controlling vehicle electronics. They include, among others, the battery, alternator, starter, fuses, relays, controllers, and wiring harnesses. These components are located in different parts of the car and work together through connectors and signal buses.

What are automotive electrical systems used for?

Automotive electrical systems are used to supply energy and transmit control signals to vehicle components. Thanks to them, it is possible to start the engine, charge the battery, and operate lights, windows, air conditioning, and safety systems. A fault in one circuit can affect not only comfort but also the correct operation of other modules.

What role does the wiring harness play in a car?

The wiring harness is an organized set of wires, covers, and connectors that connects individual consumers and controllers in the vehicle. It is used to transmit power, ground, and signals between modules. Its construction depends on the body version, equipment, and mounting location, so when replacing it, you must compare the wire routing, plug type, and number of pins.

How to choose an electrical part for a specific car?

The safest way is to compare the OEM number, manufacturer number, connector type, and mounting location. It is also worth considering the engine version, year of manufacture, body type, and equipment, as the same model may have different variants of the alternator, starter, or controller. In practice, verification by VIN is very helpful.

What symptoms indicate a problem with the electrical system?

Typical signals include difficulty starting, flashing warning lights, dimming lights, unstable charging, or the failure of selected consumers. In some cases, controller errors, air conditioning malfunctions, or periodic power outages also occur. Symptoms must always be linked to a specific circuit and cooperating component.

How to take care of automotive electrical systems in daily use?

The basis is regular inspection of the battery condition, terminals, ground wires, and charging. It is also good to check the tightness of housings, the condition of harness insulation, and the cleanliness of contacts exposed to moisture. A quick reaction to the first symptoms of voltage drops or electronic errors makes it easier to avoid a major failure.

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 W176 W246 Glow Plug Wiring Harness Loom OM651 Engine A6511501433

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P0919475G

Audi S3 8P Control Unit PDC Parking Sensor Module 8P0919475G

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9200503

BMW E60 LCI F01 F07 F10 ECU USB Hub Control Unit Module 9200503

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7527610-5

Mini Cooper One R50 R52 W10 Engine Control Unit DME Manual 7527610

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2048707658

Mercedes W204 Radio Control Function Button Knob Controller Unit A2048707658

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9313903-1

BMW 1 Series F20 F21 Rear Bumper PDC Wiring Loom Harness Cables 62395011

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9231179

Antenna Amplifier BMW F30 F80 M3 F82 M4 Rear Aerial Booster AM/FM DAB 9231179

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7473684

Door Cable BMW F25 F26 Right O/S Wiring Loom Harness Handle Light Lamp 7252538

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-7529732

BMW 5 Series E60 E61 520i 525i 530i M54 Petrol Engine Coils Wire Loom 7529732

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6906606

Mini Cooper One R50 R52 R53 Fuse Box Electrical Unit Cover Cap Black 6906606

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9266409

Gateway Module BMW F10 F11 Central Module Control Unit Lear ZGW-02 9266409

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 443937105A

VW Volkswagen Audi Skoda Seat Little Fuse Amp 30A 12V 443937105A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9240274-2

BMW E30 E31 F01 F02 F10 F11 Top View Mirror Camera 9240274

£80.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9866982

BMW F20 F22 F30 F32 REM Rear Electronic Module Fuse Box Control Unit V5 9866982

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7649087

BMW F20 LCI N20 F22 N26 Wiring Loom Harness Engine Module Ignition

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6864204

ICM Module BMW F20 F21 F30 F31 Control Unit 6864204

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9258173

Radio CD BMW E87 E90 E91 LCI Professional Bluetooth Player Control Unit 9258173

£118.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8T0959792D

Audi A5 8T Front Door Control Module Unit Left N/S 8T0959792D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6977679

BMW X5 X6 3 4 Series E70 F15 F16 F30 F31 F32 Cigarette Lighter Socket 6977679

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025450901

Mercedes W169 W245 W906 Fuse Holder Electrical Fuse Box Bracket A0025450901

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6832924

BMW 4 Series F33 F83 M4 Switch Folding Top Sliding Up Down Roof 9366374

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1698705894

Mercedes W169 W245 CD Player Radio Stereo Head Unit A1698705894

£62.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A9066840137

Mercedes Sprinter W906 Tool Case Cover Floor Trim Grey A9066840137

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9153802

BMW X5 E70 Footwell Light Module Control Unit ECU FRM II NSW Lear 9153802

£127.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9258170

BMW 1 3 E81 E87 E90 E91 E92 LCI Radio CD Professional Control Unit 9258170

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6957348

BMW 6 Series E63 E64 F06 F12 F13 Aerial Antenna Amplifier Module Right O/S

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049009004

Parking Module Mercedes W204 S204 PDC Distance Control Unit Sensor A2049009004

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G0907397R

Audi S1 8X Front Lamp Headlight DRL Ballast Control Module Unit 4G0907397R

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0959793H

Audi A1 8X Door Module Front Driver's Side Control Unit ECU 8X0959793H

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0959795D

Audi A1 8X Rear Door Module Left N/S Control Unit ECU 8X0959795D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6927904

Mini Cooper One R50 R52 R53 Radio Boost CD Player Unit Head Control 6927904

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469052403

Mercedes W156 W176 Battery Cable Negative Lead Terminal Harness A2469052403

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8583657-1

BMW F20 E90 LCI Mini R56 LCI Glow Plug Wiring Wiring Harness Engine Module

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6915175

Mini Cooper One R50 Heat Resistant Battery Box Cover 6915175

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8600358

BMW F20 F30 LCI MINI F55 F56 Integrated Relay Supply Module 8600358

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025422619-3

Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V A0025422619

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6975069

Mini Cooper One R50 R52 R53 Cable Door Right Wiring Harness Loom 6975062

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7809955

BMW E60 E90 E91 E92 LCI 335D 535d M57N2 Engine Control Unit ECU DDE 7809955

£279.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9293279

BMW F20 F21 F30 F31 F34 GT Rain Sensor Front Windscreen Light Unit 9293279

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2240943

BMW 5 Series E60 E61 LCI MINI R52 Rear Bumper PDC Ultrasonic Sensor Hot Orange

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9813233

BMW Mini Cooper Countryman R60 Fuse Distribution Box SPEG High 9813233

£151.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2059006822

Module Mercedes W205 Relay Body Control Module Unit SAM BCM A2059006822

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6855995

Control Unit Module BMW F20 F21 F22 F30 F31 ECU ICM Plus 6855995

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1648209485

Mercedes ML W164 Door Module Front Right O/S Control Unit Module A1648209485

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K3959857B

Volkswagen Polo 6R Golf Mk6 3-Door Window Lifter Switch Driver's Side 1K3959857A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7561834-1

BMW E90 E91 N46 120i 320i 150HP Engine ECU KIT DME 7561834 CAS2 Key Manual

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8E0035111D

Audi TT 8J Radio Head Unit Navi CD DVD Player Changer 8E0035111D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6955004

BMW 1 Series E87 ECU Body Control Module PL2 JBBFE 61356955004 6955004

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9311850

BMW 1 3 Series F20 F21 F30 F31 Control Unit Air Conditioning A/C Module 9311850

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-8K0959655J

Audi A4 B8 Air Module Control Unit ECU Crash Control 8K0959655J

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5M5T-14B192-CA-1

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO Set Pair 5M5T14B192CA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-7807198

BMW 5 SERIES E60 E61 LCI 520d N47 Engine Wiring Loom Harness DDE Manual 7807198

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9203081

BMW E63 Light Control Unit Module LCM LM II E6X LWR 9203081

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6940624

BMW E81 E87 E90 E91 E92 Ultrasonic-sensor PDC Arktis Metallic A34 6940624

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7595179

BMW E81 E87 LCI E90 E91 Petrol N43 Engine Control Unit ECU DME 7595179 Manual

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2035454932

Parking Module Mercedes W203 C209 Parktronic Control Unit A2035454932

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8T0959793F

Door Module Audi A5 8T A4 B8 Control Front Right O/S Unit 8T0959793F

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045400708

Mercedes-Benz W204 Parking Sensor Wiring Cable Harness Rear PDC A2045400708

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2751265-7

Cable Wiring Mini R55 R56 Headlight Lamp Front Left N/S Plug Socket 6913653

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469008819

Radio Head Unit Mercedes W176 W246 Audio 20 Media Player Navigation A2469008819

£218.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2048704526

Door Module Mercedes W204 Rear Left N/S Control Unit Module A2048704526

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6909776

BMW X5 Series E53 Control Element Light Switch 6909776

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469067100

Mercedes W176 W246 C117 Fuse Relay Box Control Unit Module A2469067100

£30.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6938221

BMW 3 Series E90 E91 Wiring Loom Front Door Left Passenger Side 6938221

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V0035399C

Audi A3 8V A-Pillar Speaker Tweeter Front Left Right N/O/S 8V0035399C

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0959433BT

VW Golf 5 Body Control Comfort Unit Module BCM Convenience Unit ECU 1K0959433BT

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2046801231

Mercedes W204 Dashboard Navigation Central Display Screen Monitor A2046801231

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 411033

iPod Most Interface BMW E60 E65 E81 E87 E90 Module Alpine 0411033

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465400340-1

Mercedes W176 Fuse Relay Box Unit A2465400340 A2469067200

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0907064C

Audi A4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907064C

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0951253-1

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins Set X2 8K0951253

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6923215

BMW E46 Inclination Indicator Alarm Tilt Sensor Module 6923215

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6956744

BMW 1 3 Series E81 E82 E87 E88 E90 E91 Ultrasonic Sensor PDC Sydney Blue 6956744

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1T0971235A

Volkswagen Golf MK5 6 Audi A3 8P Negative Battery Terminal Cable 1T0971235A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009008214

Mercedes W177 W247 W447 W907 Fuel Pump Module Control Unit ECU A0009008214

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8379766

BMW E65 E90 E91 E92 E93 Auto Boot Release Switch Tailgate 8379766

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9116255

BMW E60 E61 Touring Light Module Control Unit ECU LM MAN.LWR 9116255

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9136725-1

Mini Cooper One R55 R56 Multifuse B Battery Power Distributor Cable 9136725

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9177987

BMW E91 ECU Body Control Module H4 Electronic Box 61359177987 9177987

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9329703

BMW F20 F21 F30 F31 F32 Rear Body Control Unit Module REM 9329703

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6982652

BMW 1 Series E82 E88 Positive Battery Lead Cable Wire 61126982652 6982652

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8572918

BMW 1 Series F20 F21 LCI 116d 116ed B37 Diesel Engine Starter Motor 8572918

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0915321H

VW Volkswagen Golf Mk7 Battery Tray Holder Mounting Bracket Support 5Q0915321H

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-4G2919601T

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

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9362848

BMW 1 3 Series F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9154971

BMW Z4 Series E89 Roadster Cabrio Power Distribution Fuse Box Front 9154971

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. F20 F30 PLUG SOCKET LOOM PDC

PDC Plug BMW F20 F22 F30 F32 Loom Socket Parking Sensor Wiring Harness

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6928944

BMW X3 Series E83 Battery Positive Cable Fuse Box 61136928944 6928944

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6928975

Door Wiring Loom BMW E63 E64 Harness Passengers Side 6928975

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6860387

Air Suspension Module BMW X5 F15 F85 X6 F16 F86 Regulation Control Unit 6860387

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6912817

BMW E46 Z4 E85 E86 Antenna Amplifier Diversity 6912817

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9247467-1

BMW E92 LCI Body Control Module Unit PL2RR JBBFE L1 61359247467 9247467

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9383178

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9383178

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7601799

Earth Ground Cable BMW X3 F25 Battery Cable Engine Wiring 7601799

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1699000500

Mercedes W169 W245 Door Control Module Front Left N/S A1699000500

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6781406-1

BMW 3 5 6 Series E60 M5 E64 M6 E90 E93 M3 Accelerating Sensor

£24.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9142218

BMW X3 E83 LCI PDC Parking Ultrasonic Sensor Silver Grey 9142218 9139866

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9177773

BMW F01 F07 F10 F11 Battery Power B+ Distribution Box Rear 9177773

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9127088

BMW E81 E90 DC/DC Torque Converter Module Wandler 9253208 9127088

£13.95

Free delivery: Aug 27

If paid before 14:00

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