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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Audi Q5 8R Door Wiring Harness Loom Cable Front Driver's Side 8R0971029AQ

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W6971104G

Audi A5 S5 RS5 F5 Rear Bumper Wiring Harness Set PDC Parking Sensor 8W6971104G

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6942100

BMW E60 Air Module Control Unit Gateway Sensor B Pillar Right O/S 6942100

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1376950

Ford Kuga C394 Headlamp Xenon Ballast Control Unit Module 6M21-12K072-AA 1376950

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DG9H-19E906-BB

Ford Mondeo Mk5 Air Conditioning Sensor Dual Zone Temperature DG9H-19E906-BB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HPLA-12C520-PAC

Range Rover Sport L494 3.0 306DT 306HP Engine ECU HPLA-12C520-PAC Automatic

€327.95

Free delivery: Nov 12 – 13

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Part no. 8801718

BMW G31 Touring Switchboard Relay Fuse Box Module Control Unit 8801718

€218.95

Free delivery: Nov 12 – 13

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Part no. YMD5-04651-B

Land Range Rover Sport L320 Gearbox Wiring Loom Harness Automatic YMD504651B

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9353066

BMW F20 F21 F30 F31 Relay Cover Electric Fan Relay Cap 9353066

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A27C22

BMW X1 U11 Potential Equalizator Wiring Harness Cable 5A27C22

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9321016

On-Board Screen BMW F10 F11 LCI Central Information Display 10,25" 9321016

€237.95

Free delivery: Nov 12 – 13

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Part no. A2229050606

Mercedes W205 W212 S212 C217 Tailgate Boot Lid Control Module Unit A2229050606

€23.95

Free delivery: Nov 12 – 13

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Part no. 8648221

BMW G11 G12 G14 G15 G16 G30 G31 G32 GT Engine Control Unit Box Cover 8648221

€23.95

Free delivery: Nov 12 – 13

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Part no. 6868077-2

BMW F20 F21 F22 F30 F31 Power Steering Rack Wiring Harness Cable 6868077

€23.95

Free delivery: Nov 12 – 13

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Part no. A4515460235

Smart C451 Door Wiring Harness Protective Cap Trim Surround Left N/S A4515460235

€23.95

Free delivery: Nov 12 – 13

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Part no. A4475400010

Mercedes Vito W447 Battery Cable Alternator Wiring Diesel OM651 A4475400010

€28.95

Free delivery: Nov 12 – 13

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Part no. 1K0907719B

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1765401409

Mercedes W176 Roof Wiring Harness Cable Loom A1765401409

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 98664532300

Porsche Boxster 986 Audio Amplifier Sound System Control Unit Module 98664532300

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9425426040

Mercedes Sprinter W906 Fuse Box Relay Carrier Holder Bracket A9425426040

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2432355

Ford Transit Custom Alternator 240A 14V 2.0 EcoBlue GK2T-10300-CC

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9664944780

Citroën C4 Grand Picasso Fuse Box Cover Lid Under Bonnet 1.6 HDi 9664944780

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7401604-2

Mini Cooper F55 F56 Headlight Wiring Harness Cable Plug Right O/S 7401604

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 99661263403

Porsche Boxster 986 Door Wire Wiring Loom Driver's Door 99661263403

€70.95

Free delivery: Nov 12 – 13

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Part no. SP342ZZC

Audi Q3 8U Tow Bar Wire Harness Wiring Loom Cable Wires Plug Socket SP342ZZC

€23.95

Free delivery: Nov 12 – 13

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Part no. CX23-14300-AB

Jaguar XF X250 Positive Battery Wiring Cable Electrical Lead CX23-14300-AB

€23.95

Free delivery: Nov 12 – 13

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Part no. DWM500021

Land Rover Discovery 4 L319 Battery Tray Panel Base Mount DWM500021 5H2218N378AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 8W0035192E

Audi A4 B9 Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 8W0035192E

€284.95

Free delivery: Nov 12 – 13

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Part no. 4H0035446A

Audi A7 4G Antenna Signal Amplifier Control Unit ECU 4H0035446A

€23.95

Free delivery: Nov 12 – 13

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Part no. A0061517201

Motor Engine Starter Mercedes R172 W204 C207 W212 M271 Petrol A0061517201

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059911021G

Motor Starter Audi A7 4G Q5 8R 3.0TDI Diesel Engine Starter Unit 059911021G

€47.95

Free delivery: Nov 12 – 13

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Part no. 8X2319E616DB

Jaguar XF X250 Defrost Servo Motor Unit Module Control Panel Module 30082010

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6H52-13W030-AC-2

Land Rover Freelander 2 L359 Headlight Wire Harness Loom Left N/S 6H52-13W030-AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9387147

BMW F30 LCI 330e B48X Positive Battery Cable Plus EME Loom 9387147

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971693C

Audi A7 4G Door Wiring Harness Cable Loom Rear Left Right N/O/S 4G8971693C

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9247474

BMW 1 Series E88 ECU Body Control Module H3 Junction Box PL2RR 9247474

€61.95

Free delivery: Nov 12 – 13

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Part no. 4752820

Positive Cable BMW F20 F21 Under Bonnet Battery Wiring Loom 4752820

€32.95

Free delivery: Nov 12 – 13

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Part no. 420919275-PHB1

Audi A5 8T Parking Distance PDC Rear Ultra Sonic Sensor Phantom Black - Z9Y

€23.95

Free delivery: Nov 12 – 13

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Part no. K8D2-18808-AD

Range Rover Discovery Sport L550 Subwoofer Speaker Low Tone K8D2-18808-AD

€37.95

Free delivery: Nov 12 – 13

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Part no. AB39-15T850-AC

Ford Ranger Mk6 PDC Parking Sensor Control Module Unit ECU AB39-15T850-AC

€23.95

Free delivery: Nov 12 – 13

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Part no. 7555193

BMW F10 Control Unit Box F07 F11 Engine Ventilation Housing Box 7555193

€23.95

Free delivery: Nov 12 – 13

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Part no. 9186654

BMW E92 Door Wiring Harness Cable Loom Front Driver's Side 9186654

€61.95

Free delivery: Nov 12 – 13

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Part no. 6C1T-14A067-EA

Ford Transit Mk7 Battery Terminal Fuse Box Cover Lid Top 6C1T-14A067-EA

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G903016F

Audi A4 B8 2.0 TDI Alternator Generator 150A Diesel Engine Unit 03G903016F

€94.95

Free delivery: Nov 12 – 13

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Part no. 5N0035341G

Volkswagen Golf Scirocco CC Multimedia Interface Module Box 5N0035341G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6395402733

Mercedes Vito Viano W639 Electric Wiring Cable Loom Harness A6395402733

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009003606

Mercedes W176 W246 Automatic Transmission Control Uni A0009003606

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06N971627B

Audi A3 8Y Engine Injector Module Wiring Harness Cable 2.0 TFSI 06N971627B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9166350

BMW F06 F12 F13 Electric Parking Brake Wiring Loom Harness 9166350

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K907425B-13

Volkswagen Golf VII R 2.0TSI CJXC 300HP Engine Control ECU Kit 06K907425B Manual

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. H1BB-A625B02-AB

Ford Fiesta Mk8 Front Seat Occupancy Sensor Unit Module Left N/S H1BB-A625B02-AB

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6G9T-14A301-FC

Ford Mondeo Mk3 Fuse Relay Box Bracket Holder Support Carrier 6G9T-14A301-FC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9131717

BMW 87 E90 E91 Navigation Radio CD Player Head Unit M-Audio 9131717

€213.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. F027010000

Ford Kuga C482 Sound Amplifier Unit Module ECU Control LJ6T-18T806-CC F027010000

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5293147-2

Relay Glow Littlefuse Mega Fuse 350 A Amp 5293147

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959792B

Audi A4 B8 Door Module Control Unit ECU Front Passenger Side 8K0959793B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2139068801-1

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit A2139068801

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CK52-14300-AC

Range Rover L405 V8 Positive Battery Wiring Loom Wire Cable Lead CK5214300AC

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6949228-1

2 x Mini Cooper R52 Convertible DWA Door Alarm System Module Unit Set 6949228

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0907468J

Audi A4 B9 Gateway Control Unit Module ECU 8W0907468J

€341.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971085CE

Audi A7 4G8 Rear Bumper Parking Sensor Wiring Loom 4G8971085CE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-14027-ACA

Range Rover L322 Door Wiring Harness Loom Rear Left Right N/O/S AH42-14027-ACA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7619144

Engine Wiring BMW F10 F20 F21 F30 N20 Loom Harness Ignition Module 7619144

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BJ32-19G255-CA

Range Rover L405 Amplifier Aerial Receiver Unit Right O/S Lower BJ32-19G255-CA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9232896-3

Dashboard Monitor BMW X5 E70 X6 E71 Onboard Display Screen 8,8" Unit 9232896

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0906093

Fuel Pump Control Audi TT FV A3 8V Petrol Engine Unit Module 5Q0906093

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175406303

Mercedes C117 Door Wiring Harness Cable Front Passenger's Side N/S A1175406303

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1664406610

Mercedes ML W166 Seat Wiring Harness Front Left Right N/O/S A1664406610

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2479002707

Communication Module Mercedes W177 W247 Hermes LTE Control Unit A2479002707

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0959793R

Audi A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9356183

BMW 1 2 Series F20 F21 F22 Control Unit Sensor Air Conditioning System 9356183

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7811700-12

BMW E60 E61 LCI E90 320d 520d N47 177HP ECU KIT DDE 7811700 CAS3 + Key Manual

€161.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. M9R3-19H440-BD

Range Rover Velar L560 Keyless Entry Control Module ECU M9R3-19H440-BD

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059001527

Mercedes C205 Gearbox Control Module Unit ECU A2059001527

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129009522

Mercedes W212 Fuse Box Relay Rear SAM Control Unit Module A2129009522

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6G9T-14240-GBK

Ford Mondeo Mk4 Rear Door Wiring Harness Wire Loom Left N/S 6G9T-14240-GBK

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P5945096T-2

Porsche Cayenne 92A Rear Outer Tail Light Lamp Wiring Cable Right O/S 7P5945096T

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2038204764-1

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Loom Left N/S A2038204764

€23.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 4H0971569E

Audi A8 D4 Heater Blower A/C Air Conditioning Wiring Harness Cable 4H0971569E

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0971597

Audi Q7 4L Negative Battery Terminal Cable Wiring 4L0971597

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-14C366-AE

Range Rover L322 Transfer Box Case Control Module Unit ECU AH42-14C366-AE

€61.95

Free delivery: Nov 12 – 13

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Part no. 2G0907159A

Volkswagen VW Polo Mk6 Impact Sound Control Unit Module ECU 2G0907159A

€32.95

Free delivery: Nov 12 – 13

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Part no. 8K2T-14B006-AC

Ford Transit Connect Mk2 Air Module Crash Impact Sensor 8K2T-14B006-AC

€23.95

Free delivery: Nov 12 – 13

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Part no. 6M2T-18985-EW

Ford Mondeo Mk4 Front Rear Side Speaker Tweeter Panel Trim 6M2T-18985-EW

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0035223AL

Audi A4 B8 Q5 8R Amplifier Audio Sound Booster Module 8T0035223AL

€279.95

Free delivery: Nov 12 – 13

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Part no. 6R0971537R

Audi A1 S1 8X Skoda Fabia Battery Terminal Negative Earth Cable 6R0971537R

€23.95

Free delivery: Nov 12 – 13

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Part no. 8P4971693M

Audi A3 8P Door Wiring Harness Loom Cable Rear Left Right N/O/S 8P4971693M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 99761010206

Porsche 911 997 Boxster Cayman 987 Body Control Module ECU 99761010206

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0868160

Volkswagen Golf R CD1 Interior Speaker Trim Cover Grille Panel 5H0035412A

€42.95

Free delivery: Nov 12 – 13

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Part no. A2035450301

Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

€23.95

Free delivery: Nov 12 – 13

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Part no. 8485066

BMW X3 G01 X4 G02 Positive Cable Alternator Starter Base B Wire Line 8485066

€23.95

Free delivery: Nov 12 – 13

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Part no. CK52-14N144-CE

Range Rover L405 Battery Positive Plus + Fuse Cable Loom CK52-14N144-CE

€23.95

Free delivery: Nov 12 – 13

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Toyota Avensis T270 Aerial Antenna Amplifier Unit Module 8630005190

€42.95

Free delivery: Nov 12 – 13

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Part no. 0011868V009-1

Smart W452 BCM Body Control Module Unit Fuse Box 0011868V009

€156.95

Free delivery: Nov 12 – 13

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Part no. 4K0915429

Audi A6 C8 Battery Positive Terminal Cover Trim Panel 4K0915429

€23.95

Free delivery: Nov 12 – 13

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Part no. 8M5T-19G481-BE

Ford Kuga C394 Keyless Entry Module Control Unit Central Locking 8M5T-19G481-BE

€32.95

Free delivery: Nov 12 – 13

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Part no. BT1T-14A076-AA

Ford Transit Connect Mk1 Connect Under Bonnet Fusebox Cover Lid BT1T-14A076-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7304589

BMW F01 F02 Headlight Module LEAR TMS Headlamp Control Unit Module 7304589

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

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