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 Sprinter W907 Ground Line Battery Earth Cable Wire A9075406849

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5293147-3

Relay Glow Littlefuse Mega Fuse 250 Amp 5293147

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9364999

BMW X5 F15 F85 Front Seat Wiring Loom Harness Cable 9364999

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2115450301-1

Mercedes S211 W211 W219 Fuse Distribution Box Unit A2115453901

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6863389

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Airbag 6863389

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6970090

BMW E63 E64 Start Stop Switch Wiring Harness Cable Loom Connector 6970090

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5A17B00

BMW G20 Body Control Module BDC BDC-03 330i B48D B48B20B 2.0 Petrol 5A17B00

€180.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. JPLA-14D619-CB

Range Rover Evoque L551 Door Control Module Rear Passenger Side JPLA-14D619-CB

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9389364

Mini F54 F55 F56 F57 Head-Up Display HUD Projector Dashboard Screen 9389364

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 99161820109

Porsche 718 Boxster 982 Air Module Control Unit ECU 99161820109

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P4945096C-2

Audi A3 8P Rear Tail Brake Light Lamp Wiring Cable Right O/S Side 8P4945096C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. BJ32-14B673-AF

Land Rover Range Rover Evoque L538 Tailgate Bootlid Control Unit BJ32-14B673-AF

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 99661826500

Porsche Boxster 986 Tilt Angle Sensor Control Unit Module 99661826500

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5Q0907361G-1

Volkswagen Golf Mk7 GTI Fuse Relay Box Housing Module Control Unit 5G0907361G

€23.95

Free delivery: Sep 15 – 16

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Part no. 4B0955531A

Audi VW Volkswagen Seat Relay Unit Module 9 Pins 12V UH2 4B0955531A

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2118206185

Mercedes E S Class W211 W220 Telephone Hands Free Control Module A2118206185

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2044405835

Mercedes S204 Front Door Wiring Loom Harness Cable Driver Side A2044405835

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. BM51-A625B02-AC

Ford Focus Mk3 Seat Occupancy Sensor Front Passenger Side BM51-A625B02-AC

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W6971449C

Audi S5 F5 Door Wire Wiring Cable Loom Harness Rear Left Right N/O/S 8W6971449C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8X0971035CA

Audi A1 S1 8X Door Wiring Harness Cable Loom Front Driver's Side 8X0971035CA

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9869880

Mini F54 F55 F56 Body Control Module Domain Controller Unit BDC 9869880

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8J0915459

Audi A4 B8 A5 8T TT MK2 Positive Battery Terminal Cable Overload Fuse 8J0915459

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. FR3B-14E072-R30XD

Ford Mustang Mk6 Front Right Door O/S Wiring Cables Harness FR3B-14E072-R30XD

€56.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8654977

BMW X5 F15 N20 Petrol Sensor System Engine Wiring Harness Cable Loom 8654977

€175.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. CK5214C249AA

Range Rover L405 Front Driver's Seat Control Module Unit CK52-14C249-AA

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. CC1T-10300-CD

Ford Transit Mk8 2.2 TDCI Alternator Generator CC1T-10300-CD

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A4479001118

Mercedes W447 Front Air Module Control Unit ECU A4479001118

€488.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7604347

BMW F20 F30 F31 F32 Bracket Holder Power Distribution Control Unit 7604347

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LR014003-2

Land Rover Discovery 4 L319 Rear Taillight Lamp Wiring Cable Left N/S LR014003

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8662849-2

Mini Cooper S F54 F55 F56 B48 192HP Engine Control Module ECU DME 8662849 Manual

€398.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055400010

Mercedes W205 Door Wiring Harness Loom Cable Front Passenger Side A2055400010

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8589145-12

BMW F20 120d F30 LCI 320d B47 190HP Engine Unit ECU Kit DDE 8589145 Key + FEM

€336.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P0035195P

Audi A3 8P CD Player Radio Stereo Head Unit 8P0035195P

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2056186000

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186000

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7182509

BMW E92 E93 Plug Socket Wire Bi-Xenon Headlight Headlamp Lamp Front Left N/S

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7L6035530B

VW Volkswagen Touareg 7L Aerial Antenna Amplifier Control Unit Module 7L6035530B

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5A2D553

Audio Receiver BMW F40 G22 G30 G31 X3 G01 DAB ECE Control Unit Module 5A2D553

€73.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8590041

BMW G30 G31 B47 Diesel Glow Heater Plug Engine Wiring Loom Cable 8589786

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9187604

BMW F07 F10 F11 F12 TV Video Switch Control Module Unit 9187604

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125458040

Bracket Holder Mercedes W204 W212 W222 Auxiliary Generator Battery A2125458040

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2045402210

Mercedes W204 Front Door Electrical Cable Wiring Loom A2045402210

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6C0907159A

Volkswagen Polo Impact Sound Control Module Unit 6C0907159A

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1645400641

Mercedes-Benz M-Class W164 Battery Ground Earth Strap Cable Wiring A1645400641

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7P5035225C

Porsche Cayenne 92A Aerial Antenna Amplifier Lid Left N/S 7P5035225C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2191045

Ford Transit Connect Glow Plug Wiring Loom Cable Wire 1.5 TDCi Diesel 2191045

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. M8D2-14A073-AA

Land Range Rover Evoque L551 L550 Fuse Box Relay Box Module Unit M8D2-14A073-AA

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. NNW004050

Land Rover Discovery 2 L318 2.5 Diesel 138HP Engine Unit ECU NNN000120 Manual

€450.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 99161818510

Porsche 718 Boxster 982 Parking Aid Control Unit Module 99161818510

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2479007312

Mercedes W212 Suspension Module Adjustment Control Unit Controller A2479007312

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4F5035225AJ

Audi A6 C6 Aerial Antenna Amplifier Right O/S FM Booster Unit 4F5035225AJ

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9315080

BMW X3 F25 Window Lifter Switch Driver's Side Wiring Harness Loom Cable 9315080

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2208200175

Mercedes W220 Front Door Keyless Entry Antenna Left N/S Side A2208200275

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8X0971036AA-1

Audi A1 8X Door Wiring Harness Loom Cable Front Passenger Side N/S 8X0971036AA

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6C1T-14A076-BA

Ford Transit Mk7 Fuse Box Positive Terminal Cover Trim Panel 6C1T-14A076-BA

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 99761817112

Porsche Cayman 987C Immobilizer Alarm Control Module Unit 99761817112

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8K0971036B

Audi RS4 B8 Door Wiring Harness Cable Loom Front Right O/S 8K0971036B

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055401410

Mercedes S205 C253 Rear Door Harness Wiring Cable Left Right N/O/S A2055401410

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8X0971036N

Audi A1 8X Door Wiring Harness Cable Loom Front Passenger Side N/S 8X0971036M

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8K0971035L

Audi A4 B8 Door Wiring Wire Harness Loom Cable Front Driver Side 8K0971035L

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LR062205

Land Rover Discovery 4 L319 Front Bumper PDC Wiring Harness Loom FH22-14369-CB

€85.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W0035188E

Audi A4 B9 A5 F5 MMI Navigation Radio Head Unit Multimedia 8W0035188E

€203.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5Q0927165C

Seat Leon Mk3 VW Golf Mk7 Audi A3 8V Fuse Box Insert Cover Trim Plate 5Q0927165C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. FH22-18D493-AA

Land Rover Discovery 4 L319 Heated Seat Control Module ECU FH22-18D493-AA

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9181454

BMW X1 E84 Aerial Antenna Noise Suppression Filter 9181454

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. FH22-14B006-BB

Range Rover Sport L494 Air Crash Impact Sensor Left Right N/O/S FH22-14B006-BB

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6821407

High Voltage Cable BMW F45 Mini F60 Hybrid Harnes EDH 6821407

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. CK52-14A067-BB-2

Range Rover Vogue L405 Fuse Relay Box Electrical Unit CK52-14A067-BB

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8E1971035EL

Audi A4 B7 Door Wiring Harness Loom Cable Front Driver's Side 8E1971035EL

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0009951033

Mercedes W204 Exhaust Pipe Connector Clamp Holder M274 Petrol A0009951033

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. K8D2-14A076-BC

Land Range Rover Sport L320 Fuse Relay Box Cover Lid Panel K8D2-14A076-BC

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2025402373-2

Mercedes W169 W203 W211 2 OBD Diagnostic Plug Cover A2025402373

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2479009312

Mercedes W910 Telematics Module Communication Blutooth Control A2479009312

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2124405433

Mercedes W212 Wiring Harness Right Front Door Control Unit Right O/S A2124405433

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2195406207

PDC Wiring Mercedes W211 W219 Front Bumper Parking Sensor Loom Cable A2195406207

€75.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LR143878

Land Rover Range Rover Evoque L551 Battery Cable Wiring Harness M8D2-14N170-AB

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6G9T-14240-HBK

Ford Mondeo Mk4 Door Wiring Loom Wire Harness Rear Right O/S 6G9T-14240-HBK

€85.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8619095

BMW i3 I01 Hybrid Electric Earth Ground Cable Negative Battery Lead 8619095

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7PP907539A

Porsche Cayenne 92A Dashboard Light Sun Solar Sensor Unit 7PP907539A

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7311030-2

BMW F45 Rear Light Lamp Trim In The Side Panel Wiring Cable Right O/S 7311030

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LR028116

Land Rover Range Rover Evoque L538 Alternator 2.2 TDCI BJ32-10300-AD

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2079053300

Mercedes-Benz W207 Cabrio A207 Rear Left N/S Radio Aerial Antenna Amplifier

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2098200326

Mercedes C209 Body Control Module Unit Temic 376 800 GZ A2098200326

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8R0971030BD

Audi Q5 8R Front Door Wiring Loom Harness Cable Passenger Side 8R0971030BD

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. AV1T-18B955-BD

Ford B-Max Dashboard Display Multifunction Screen Monitor AV1T-18B955-BD

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7515197-2

MINI Cooper One R50 W10 Battery Cable Plus Pole 7515197

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8585731

Engine Wiring BMW F30 F31 F36 N47N xDrive Automatic Gearbox Loom Harness 8585731

€75.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2513200158-1

Valve Block Mercedes W251 W906 Air Suspension Control Unit Module A2513200158

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9301522

BMW F01 F02 F07 F10 F11 CAS4 Control Unit Key Reading Module 9301522

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8T0035223J

Audi A4 B8 Suond Amplifier System Speaker Module Unit 8T0035223J

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. GJ32-14D620-BA

Land Rover Discovery Sport L550 Door Module Rear Driver's Side GJ32-14D620-BA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5B5D979

BMW F74 M235iX B48R 300HP Engine Control Unit ECU Set DME 5B5D979 Automatic

€731.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. AH42-14630-AFB

Range Rover L322 Door Wiring Harness Loom Front Passenger Side AH42-14630-AFB

€85.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5H32-10E921-BA

Range Rover L320 Aerial Antenna Amplifier Module 5H32-10E921-BA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2990003-3

BMW X1 E84 Headlight Lamp Light Front Cable Wire Plug Left N/S 2990003

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W0959655B

Audi A4 B9 A5 S5 F5 Air Module Control Unit ECU 8W0959655B

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8617707

BMW Mini Cooper F55 F56 Wiring Harness Engine Supply Module Cable Loom 8617707

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8517874-8

BMW F20 118d F30 318d N47N 143HP Engine ECU Kit DDE 8517874 + Key + FEM + Lock

€222.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2059007147-1

Mercedes W205 C200 264.915 198HP Engine Control ECU Kit A2649000700 Automatic

€560.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9496815

Front Impact Sensor BMW F70 G05 G14 G15 G29 Safety Crash Module Unit 9496815

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

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