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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BMW X3 Series E83 M47N2 2.0d 150HP ECU Kit DDE + EWS3 + Key 7799855 Manual

£170.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2095404010

Mercedes A209 Front Door Cable Wiring Loom Harness Left N/S A2095404010

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9316569

BMW X5 F15 Fuse Box Rear Relay Module Control Unit 9316569

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2038703594

Mercedes CL203 CLC Head Unit CD Player Radio Audio Controller Unit A2038703594

£75.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8T0035785A-1

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035785A

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2124400706

Wiring Harness Mercedes W212 LED Lighting Air Nozzle Cable A2124400706

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. A1645403572-1

Mercedes W164 W251 Fuse Box Relay Module Control Unit A1645403572

£142.95

Free delivery: Jul 14

If paid before 14:00

Part no. A6461502734-1

Mercedes W204 C220 CDI 170HP 646.811 Engine Unit ECU A6461502734 Automatic

£142.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8518569-4

BMW F20 F21 F30 F31 N47N 116d 316d Engine Control Unit ECU DDE 8518569 Automatic

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6822106

Head Unit BMW X3 F25 X4 F26 Radio Media GPS Sat Navigation Unit 6822106

£137.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7P5035481D-2

Porsche Cayenne 92A Sound Audio Amplifier Bose AMP 7P5035481D

£469.95

Free delivery: Jul 14

If paid before 14:00

Part no. LR014114

Range Rover L405 Headlight Left Right N/O/S Ballast Control Unit AH22-13C170-AA

£37.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9383681

Mini F55 Fuse Box Front Body Control Module ECU BCM Unit 13275881

£104.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 5Q0937125A

Fuse Relay Box Volkswagen Audi Skoda Seat Engine Bay Supply Unit 5Q0937125A

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9381096

BMW F20 Front Electronic Body Control Module Unit FEM ECU 9381096

£75.95

Free delivery: Jul 14

If paid before 14:00

Part no. rhd-A2135400124

Mercedes W213 Fuse Relay Electrical Box Housing Covering Panel A2135400124

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7541009

BMW E90 E90N E91 E91N E92 E92N E93 LCI NOX Wiring Loom Cable 7541009

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. rhd-A2383401000

Battery Pipe Mercedes W205 W213 C238 W257 W290 Hose Line Tube A2383400800

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. AV6T14A067BC

Ford Transit Connect Mk2 II Fuse Box Battery Terminal Unit Module AV6T14A067BC

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8K1907115C

Audi A4 B8 1.8 TFSI CDHA 160HP Engine Control Unit ECU Kit 8K1907115C Manual

£104.95

Free delivery: Jul 14

If paid before 14:00

Part no. rhd-A2215403410

Mercedes W221 Negative Battery Terminal Cable Wiring Lead A2215403410

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 5Q0907530L

Volkswagen Golf Mk7 Gateway Control Unit Module 5Q0907530L

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9M5Q12A343AA

Ford Mondeo MK4 Diesel Glow Plug Relay Control Unit Module 9M5Q12A343AA

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2044401005

Mercedes-Benz C W204 Rear Left N/O/S Right Door Wiring Loom Harness A2045407609

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7176068-2

BMW 3 6 X3 Series E46 E63 E83 MINI R50 R53 Control Unit Xenon Light 1307329074

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8517862-3

BMW F20 F30 F32 120d 320d 420d Diesel N47N 184HP ECU Kit DDE 8517862 + Key + FEM

£189.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8518268-3

BMW E90 E91 LCI 318d Diesel 143HP N47N ECU Kit DDE 8518268 + CAS3 + Key Manual

£132.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8617050

Mini One R56 LCI N16 1.6 98HP Engine Control Unit Module ECU DME 8617050 Manual

£94.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9128982

BMW F20 F30 F31 LCI Mini F55 F56 Compensator LTE UK Control Unit Module 9128982

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. A1765406005

Mercedes X156 Wiring Harness Loom A1765406005

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7807828-3

BMW E87 LCI E90 118d 318d N47 143HP Diesel ECU KIT DDE 7807828 CAS3 + 2 Keys

£113.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2469005515

Mercedes W176 Rain Light Sensor Control Unit Front Windscreen Camera A2469005515

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8J0945096G-2

Audi TT 8J Rear Tail Lamp Light Wiring Harness Plug Right O/S 8J0945096G

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 5A693C7

Distribution Box BMW G11 G12 G30 G31 Hybrid Junction Point B+ Rear 5A693C7

£161.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9249462

BMW F07 GT X3 F25 Camera Module Reversing Camera Rear View Control Unit 9249462

£47.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8506374-4

BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8506374 CAS3 + Key Automatic

£132.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6C11-3C190-AB

Ford Transit MK7 Yaw Sensor ESP Rotation Rate Control Unit Module 6C11-3C190-AB

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. A1728200815

Mercedes W204 C207 Centre Console Aux Port Socket Plug Terminal A1728200815

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. A6519009702-4

Mercedes W176 A200d 651.930 136HP Engine ECU Kit Ignition + Key A6519009702

£189.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9353423

BMW F06 ECU Body Control Module Junction Box PL6 JBBFEIII 9353423

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2128203385

Door Module Mercedes W212 Front Left N/S Door Control Unit A2128203385

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8509910

BMW X3 F25 X4 F26 Engine Electronics Control Unit Box Cover Trim 8509910

£21.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6819652

Map Fuse Box BMW F15 F16 F85 F86 Grouping Diagram Card 6819652

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 5QA915181E

Audi Q3 RSQ3 F3 Negative Cable Battery Terminal Wiring Loom 5QA915181E

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9252125

BMW X3 F25 Control Module Junction Box Electronics LEAR JBBFE III 9252125

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 420919275-IWH

Audi A4 A5 Q7 Rear Bumper PDC Parking Sensor Ibis White - Y9C 420919275

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. FK72-14D374-AK

Land Rover Discovery Sport L550 Air Module Control Unit ECU FK72-14D374-AK

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2055400841

Mercedes W205 Rear Bumper PDC Parking Control Sensor Harness Wiring A2055400841

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2118703226

Mercedes W245 Bluetooth Control Unit Module Hands Free A2118703226

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6857300

Air Module BMW F01 F02 LCI F10 F11 F13 ICM Crash Control Unit ECU 6857300

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9300859

BMW X5 F15 Fuel Tank Cable SCR AdBlue Unit Adapter Wiring Harness Diesel 9300859

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6868257

Air Module BMW X5 F15 X6 F16 ECU ICM Control Unit 6868257

£37.95

Free delivery: Jul 14

If paid before 14:00

Part no. A6461501177

Mercedes W639 109 CDI OM646.980 95HP Engine Control Unit ECU A6461501177

£94.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6966551

BMW 5 Series E60 E61 Front Door Wiring Loom Harness Passengers Side 6966549

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8518477-3

BMW X3 F25 20dX 184HP N47N Engine Unit ECU Kit DDE 8518477 Key CAS4 Automatic

£94.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8578504

BMW F30 LCI 335dX N57Z Engine Gearbox Module Wiring Cable Loom Harness 8578504

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2158200611

Mercedes W164 W649 W906 Bluetooth Hands Free Mobile Phone Adapter A2158200611

£56.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9249404

BMW E81 E87 E90 E91 LCI E92 E93 CD Radio Business Unit 9249404

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 3457428-2

BMW Mini Cooper R56 Footwell Light Module High EKS ECU LEAR PL3 FRM3R 3457428

£189.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2721533291

Mercedes CL203 CL350 M272.960 Engine Unit ECU Module A2721533291 Automatic

£351.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7624617-1

BMW F20 F21 F30 F31 F32 Cable Alternator Starter Base B 7624617

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 4L0907335

Audi Q7 4L Quattro S Line Keyless Entry Antenna Control Module 4L0907335

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8583091

BMW X5 E70 G11 Integrated Supply Module Ecu Control Unit 8583091

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8574752-1

BMW F25 20dX B47 190HP Engine Unit ECU Kit DDE 8574752 CAS4 Key Automatic

£332.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8642682

BMW 3 Series F30 LCI 330e Negative Earth Cable High Voltage Battery 8642682

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 83A035382A

Audi RSQ3 F3 Boot Trunk Subwoofer Rear Bass Speaker 83A035382A

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A1779006003

SRS Module Mercedes W177 Safety Belt Tensioner Airbag Control A1779006003

£42.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8691838-1

Mini F54 F55 F57 B48 136HP Petrol Engine Control ECU Kit DME 8674258 Manual

£237.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8507136-1

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8507136 CAS3 + Key

£94.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6868254

BMW F33 ECU ICM Control Sensor Unit Air Module ECU 6868254

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6960428

BMW 3 5 6 Series E60 E61 E63 E64 E90 E91 FBAS Analog Video Module Unit 6960428

£146.95

Free delivery: Jul 14

If paid before 14:00

Part no. RHD-5A2DA15

BMW F40 Power Steering Rack Wiring Harness Loom Cable 5A2DA15

£32.95

Free delivery: Jul 14

If paid before 14:00

Part no. A9079051202

Mercedes Sprinter W907 Battery Wire Negative Lead Cable A9079051202

£23.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9122100

BMW 1 Series E88 Mini Cooper R57 R59 Sat Nav GPS Antenna Amplifier 9122100

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9337233

BMW F32 F33 F82 F83 M4 Door Wiring Front Harness Loom Cable 9337233

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2139004409

Mercedes W213 Door Module Front Right O/S Control Unit A2139004409

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. 4E0941817B

Audi A6 A8 D4 Q7 4M CAN Bus Jumper Contact Bridge Connector Plug 4E0941817B

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6863389

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

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. A9064407353

VW Crafter I Mercedes Sprinter W906 Fuel Tank Wiring Loom Cable A9064407353

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 1812480

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

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2829003300

Mercedes W177 A200 163HP M282.914 Engine Control Unit ECU A2829003300 Automatic

£28.95

Free delivery: Jul 14

If paid before 14:00

Part no. A6421509478

Mercedes ML W164 OM642 Diesel Engine Control Unit Module ECU A6421509478

£170.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9345377

BMW F06 Gran Coupe Footwell Light Module Control Unit ECU FRM III 9345377

£37.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8V0863051

Audi A3 8V AMP Amplifier Under Seat Cover Trim Panel Unit 8V0863051

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2049012604

Mercedes W204 Parking Control Unit Module ECU A2049012604

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7522284

Mini Cooper One R50 R52 W10 Battery Cable Plus Pole 7522284

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7621178-5

BMW E81 E87 LCI E90 N43 118i 318i Engine Control ECU DME Kit 7621178 Automatic

£313.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 4RA007813

Relay Mercedes W204 4-Pin Electrical Relay Black Hella 12V 4RA007813

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. RVH000095

Land Rover Discovery 3 L319 Relief Suspension Valve Block Control RVH000095

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 6948048

BMW Z4 E85 Front Door Wiring Loom Cable Right O/S Harness 6948048

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. A2045420423

Mercedes W204 PDC Parktronic Parking Sensor Display Warning Rear A2045420423

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9240533-2

BMW E90 Max Brose Footwell Light Module Control Unit ECU FRM3R PL2 Lear 9240533

£94.95

Free delivery: Jul 14

If paid before 14:00

Part no. 5QA919294C

Audi Seat Skoda Volkswagen PDC Parking Sensor Control Unit Module 5QA919294J

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 5J0919475A

Skoda Octavia II 1Z Control Unit PDC Parking Sensor Module 5J0919475A

£18.95

Free delivery: Jul 14

If paid before 14:00

Part no. 8510221-10

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

£113.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. A2118705426

Rain Sensor Mercedes W211 C219 Front Windscreen Control Unit A2118705426

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 4H0907401-1

Audi A8 4H 3.0 TDI CDTA 250HP Quattro Engine ECU Kit 4H0907401 BCM + Key + Lock

£313.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 9137803

MINI Cooper R55 R56 R57 R58 R59 Drivers Door Wiring Cable 9137803

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9212176

Door Cable BMW F01 F02 Front Right O/S Wiring Loom Harness 9212176

£28.95

Free delivery: Jul 14

If paid before 14:00

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