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 R171 SLK 200 163HP 271.944 Kompressor Engine ECU A2711538579 Manual

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2135406100

Fuse Box Mercedes W205 Interior Equipment Fuse Box Control Module A2135406100

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009827403

Mercedes W205 Energy Distributor Power Electrical Control Unit A0009827403

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7811701-1

BMW E87 E90 LCI 118d 318d N47 Diesel ECU KIT DDE 7811701 + CAS3 + Key Automatic

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G8959793J

Audi A6 C7 Door Module Control Unit ECU Front Left N/S 4G8959793J

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A4479009808

Mercedes Vito W447 Fuse Box Relay Control Unit Electric Module SAM 4479009808

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2115406445

Mercedes C219 Gearbox Electronic Control Unit Module A2115406445

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7P5035481D-1

Porsche Cayenne 92A Subwoofer Sound Speaker Bose 7P5035481D

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8506444

BMW E90 E91 LCI E92 330d N57 245HP ECU Engine Control Unit DDE 8506444 Manual

£94.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A0009002308

Mercedes W447 W906 Adblue Module Exhaust Gas Control Unit ECU A0009002308

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2205400382

Mercedes CL S Class C215 W220 Fuse Box Unit Front Right O/S Cover A2205400382

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5N0906093C

Audi Q3 S Line Fuel Pump Relay Control Unit Module ECU 5N0906093C

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA959651A

Audi A3 8Y VW Golf Mk8 Front Air Module Crash Impact Sensor 5WA959651A

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 06B911023A

Audi A4 B7 2.0 TFSI Starter Motor Engine Motor Actuator Petrol 03L911021E

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2219067300

Mercedes-Benz S-Class W221 Fuse Box Control Unit Module SAM A2219067300

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9175867

BMW 5 Series E60 E61 Cable Loom Door Wiring Harness 9175867

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A4475450069

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049008213

Mercedes W204 COMAND Navi CD Player Radio Sat Nav Head Unit A2049008213

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G5971687BQ

Audi A6 C7 4G Rear Door Harness Wiring Loom Cable Left N/S 4G5971687BQ

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6G9T-14B192-CA

Ford Fiesta Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-CA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8379938

BMW 3 Series E46 Ultra Sonic-Module 8379938

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1679002413

Mercedes W167 W177 Radio Stereo Nav Navigation Head Unit High A1679002413

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9367672

Mini F55 F56 F57 Central Cover Information Instrument Radio 9367672

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9326409

Door Wiring Harness BMW F31 F34 Front Driver Door Wiring Loom Cables 9326409

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009009903

Mercedes W212 E63 AMG Drive Unit Extended Control Module ECU A0009009903

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0005458916

Mercedes W639 Automatic Gearbox EGS Control Unit Transmission Module A0005458916

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-5N2971121

Volkswagen Tiguan 5N Door Wiring Harness Cable Loom Front Left N/S 5N2971121

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P4971036F

Audi A3 8P Front Passenger Door Wiring Left N/S Harness Loom Cable 8P4971036F

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. XRA500031

Land Rover Discovery 3 L319 Traffic Master Control Unit Module XRA500031

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0035502B

Audi A4 B9 Wireless Charger Centre Console Phone Charging Module 8W0035502B

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009050538

Mercedes-Benz S-Class W221 Multi Purpose Camera Control Unit Module A0009050538

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 03L903023

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9354393

Mini F55 F56 F57 Central Cover Information Instrument Radio 9354393

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049001813-1

Mercedes W204 CD Player Radio Stereo Navigation Sat Nav Head Unit A2049001813

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8703399

BMW G30 F90 M5 Antenna Aerial Diversity Amplifier Unit 8703399

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049003915

Mercedes C204 Radio Sat Nav CD Stereo Head Unit A2049003915

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V4971687K

Audi A3 RS3 8V 5Dr Door Harness Loom Wiring Rear Left Right N/O/S 8V4971687K

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2781500056

Wiring Harness Mercedes GLE W166 C292 Automatic Gearbox Cable Loom A2781500056

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2079000600

Mercedes C207 Door Module Rear Right O/S Control Unit ECU A2079000600

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8596362-5

BMW F20 F30 LCI 120d 320d B47 Engine ECU Kit DDE 8596362 FEM + Key Automatic

£275.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9176194

Mini Cooper R57 R58 R59 Radio Aerial Antenna Amplifier FM 9176194

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7478448

BMW X3 X4 G01 G02 Footwell Light Module Carpet Control Unit ECU Right 7478448

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6826985

BMW F22 F23 F30 F34 LCI Control Unit Air Module ECU 6826985

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. KK3T-14D068-JD

Ford Transit Mk8 Fuse Box Power Distribution Relay 2.0 Diesel KK3T-14D068-JD

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7316535-3

BMW F06 F13 Sliding Sunroof Drive Motor Unit Webasto 7316535

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8573260-4

ECU Kit BMW F20 F21 116d ed Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3457402

Mini Cooper R58 Coupé Footwell Light Module High EKS PL3 FRM3R 3457402

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7PP035223P

Porsche Cayenne 92A Audio Sound Amplifier Bose System 7PP035223P

£550.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7607685

Mini One R56 LCI R60 N16 98HP Petrol Engine ECU DME 7607685 Control Unit Manual

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6821970

Mini Cooper One F54 F55 F56 F60 ECU Body Domain Controller BDC Module 6821970

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8691836-2

BMW F20 F30 LCI 118i 318i B38 136HP ECU Kit DME 8691836 Key FEM Lock Manual

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA906507A

Audi A3 8Y VW Golf Mk8 Engine Module ECU Mount Bracket Support 5WA906507A

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-3G2971366AQ

Volkswagen Passat B8 3G Seat Base Adapter Wiring Harness Loom Cable 3G2971366AQ

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0971030

Audi A4 S4 B9 Front Door Wiring Harness Loom Cable Left N/S 8W0971030

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055409309

Door Wiring Mercedes W205 C253 Passenger Side Cable Harness Loom A2055409309

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9131850

CD Changer BMW E60 E61 E63 6-DISC Compact without Magazine 9131850

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8J0907115AJ-1

Audi TT Mk2 8J 2.0 TFSI CESA 211HP Engine Control Unit ECU 8J0907115AJ Manual

£379.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F0971845A-1

Audi A6 S6 C6 Body Comfort Module Convenience Control Unit 4F0907289J

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5F0035877A

Seat Leon FR 5F MMI Navigation Sat Nav MMI Head Unit 5F0035877A

£203.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215402350

Fuse Box Mercedes W221 W216 Junction Control Unit Relay Module A2215402350

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F1971035N

Audi A6 C6 Front Driver Side Door Wiring Harness Loom Cable 4F1971035L

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4E0941817

Audi A6 A8 Q7 CAN Bus Jumper Contact Bridge Connector 4E0941817

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2113231126

Mercedes-Benz E Class W211 Front Left Anti Roll Bar Clamp Bracket A2113231126

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9232896-1

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

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A6111500433

Mercedes W203 OM611 Diesel Engine Wiring Cable Loom Harness A6111500433

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9075402605

Mercedes W907 Fuse Box Control Unit Module Q2 A9075402605

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A872D1

BMW F40 Telematics Control Module Unit TCU 5A872D1

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9156238

BMW E60 E61 E63 Professional CCC Navigation System Controller JAPAN 9156238

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9321002

Battery Cable BMW X3 F25 X4 F26 Underfloor Positive Plus Lead Harness 9321002

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9224592-3

BMW E84 Footwell Light Module Control Unit ECU PL2 FRM3R 9224592

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2447525

Telematics Module BMW F21 Bluetooth Control Unit ECU 2447525

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0959795P

VW Touareg 7P Rear Door Module Control Unit Left Right N/O/S 4H0959795P

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0971228M

Battery Cable Volkswagen VW Golf Mk5 Positive Plus Pole Lead 1K0971228M

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G0907468AD

Audi RS6 C7 CAN BUS Gateway Control Module Unit ECU 4G0907468AD

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0959793

VW Volkswagen Caddy 2K Window Regulator Motor Module ECU 5K0959793

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8682893

BMW F20 F30 LCI 120i 320i 330i B48 Engine Wiring Cable Loom Harness 8644504

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2661539679-1

Mercedes W169 W245 B170 M266.940 116HP Engine Control Unit Set A2661539679

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A1D0B2

BMW F70 G30 U06 Comfort Access Antenna Keyless Entry Aerial Module 5A1D0B2

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9133083-1

BMW E81 E87 E90 E91 E92 6-disc CD Changer 9133083

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8517727-6

Mini Cooper SD ALL4 R56 LCI R60 143HP N47N Engine ECU Kit DDE 8517727 Manual

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6866986

BMW F01 F02 LCI F06 F10 F11 F13 ECU ICM Control Unit Module Airbag 6866986

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7567362-2

BMW 3 Series E90 E91 E92 325i N52N 218HP ECU Kit DME CAS3 Key 7567362 Manual

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4M51-10723-BC

Ford Kuga Mk1 C394 Battery Tray Box Cover Housing Trim Panel 4M51-10723-BC

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8R0035464A

Audi Q5 8R Amplifier AMP Booster Mount Bracket 8R0035464A

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7848838

BMW M4 F82 Smart Opener Sensor 7848838

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8H1971035CT

Audi A4 S4 RS4 8H Cabriolet Door Wiring Loom Harness Passenger Side 8H1971035CT

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8586540-5

BMW F30 F32 LCI 330d 430d N57N 258HP Control Unit ECU Kit DDE 8586540 FEM Key

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9231841

Door Cable Mini R55 R56 LCI Wiring Loom Front Right Driver's Side 9231841

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. AG91-12A650-ADF

Ford Mondeo Mk4 Engine Control ECU 2.0 TDI 163 HP KIT AG91-12A650-ADF Manual

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8510832-4

BMW E90 E91 LCI 318d N47N 143HP Engine Control ECU DDE 8510832 Manual

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8517862-12

BMW F20 F21 F30 F31 F32 N47N 184HP Engine Control ECU DDE Kit 8517862 Automatic

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2039000100

Mercedes CL203 CLC Head Unit CD Player Radio Audio Controller Unit A2039000100

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6C0907359A

Volkswagen Polo 6C Air Suspension Module Regulation Control Unit 6C0907359A

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9143823-1

BMW E88 E93 LCI ECU Air Control Unit Module Controller 9143823

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-8R2035666A

Audi A4 B8 A5 8T MMI Radio Sat Nav Head Unit Harman 8R2035666A

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0971228AB

Audi A3 8V Q2 GA VW Passat Golf Battery Terminal Positive Cable 5Q0971228AB

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215450601

Mercedes W221 Dashboard Fuse Box Front Left N/S Control Module A2215450601

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8674262-1

Mini Cooper S F55 F56 B48 192HP Engine Control Unit ECU Kit DME 8662849 Manual

£165.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 5BA33A3

Mini F66 Telematics Bluetooth Module Control Unit 5BA33A3

£137.95

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