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 E85 Fuses Electrical Fuse Set 6933410

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6927705

BMW 5 Series E60 E60N E61 E61N Battery lead positive underfloor 80 MM² AL petro

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9244199

BMW E92 E84 Telematics Module Bluetooth Combox Telematik Phone Module 9244199

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959792S

Audi A4 B8 Front Door Control Module Unit ECU Passenger Side 8K0959792S

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2125406250-1

Mercedes W212 SAM Fuse Prefuse Box Relay Junction Control Unit A2125406250

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V21-10718-AD

Ford Fiesta Mk7 Battery Box Tray Housing Holder Bracket 8V21-10718-AD

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8579479-1

BMW 1 3 Series F20 F21 F30 F31 118d 318d N47N ECU Kit DDE 8579479 + Key + FEM

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9065410140

Mercedes-Benz Sprinter W906 Battery Tray Holder Mounting Bracket A9065410140

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0941823

Audi A5 F5 Power Distribution Relay Fuse Box Battery 8W0941823

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8570934-1

BMW F20 F21 116d ed Diesel N47N 116HP ECU Kit DDE 8570934 + Key + FEM Manual

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A6519003701-1

Mercedes W212 OM651.924 E220CDI 170HP Engine ECU Kit + Key + Lock A6519003701

£151.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0919475T

Audi A5 8T PDC Parking Distance Control Module Unit Valeo 8K0919475T

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2649001200

Mercedes W177 A35 AMG 306HP M260.920 4-Matic Engine ECU Control Unit A2649001200

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9383063

Mini Cooper F55 F56 Navigation DAB Head Unit Sat Nav Professional 9383063

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2475459400

Mercedes C118 W177 W247 Front Battery Box Tray Housing Cover A2475459400

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8U0955559

Audi A1 8X A3 8V Windscreen Rain Sensor Control Unit 8U0955559

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5F0035858A

Seat Leon Mk3 5F Radio Head Unit Multi Media CD Player Sat Nav 5F0035858A

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9231515

BMW F31 Rear Antenna Aerial Amplifier AM/FM DAB 9231515

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0907530AF

Gateway Module Audi A3 8P Volkswagen Golf Mk6 Control Unit ECU 1K0907530AF

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7587164-2

BMW E82 E88 Cabrio 125i N52N 218HP ECU Kit DME 7587164 CAS3 Key Manual

£256.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959793M

Audi Q5 8R Front Door Module Control Unit ECU Driver's Side 8K0959793M

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G8959793G

Audi RS6 C7 Front Door Module Driver's Side Control Unit ECU 4G8959793G

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059006337

Safety Module Mercedes S205 Airbag Belt Tensioner Control Module SRS A2059006337

£161.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9247386

BMW X3 F25 Body Control Module ECU Junction Box JBBFE III V9 Lear 9247386

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9343304

BMW X5 F15 X4 F26 Antenna Aerial Diversity Trap Circuit Control Module 9343304

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059004607

Mercedes W205 S205 W447 Seat Module Front Memory Control Unit A2059004607

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128204185

Mercedes W204 W212 Door Module Control Unit Module Rear Right O/S A2128204185

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9273597

BMW F01 F10 F11 Audio Player Rear DVD Background ECE US Head Unit 9273597

£118.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9381837

BMW X1 F48 Mini F55 F56 Air Module Control Unit ECU 9381837

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9197131

BMW X3 Z4 E83 E85 CID Control Unit CD Player Radio Audio System 9197131

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. BJ32-14D620-AC

Land Rover Freelander 2 L359 Rear Door Control Unit Module BJ32-14D620-AC

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8510829-2

BMW E90 E91 LCI N47N 320d Engine ECU KIT DDE CAS 3 + Key 8510829 Automatic

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1S0919275D-TOG

Audi Q3 8U PDC Parking Distance Control Sensor Tornado Grey-X7P 1S0919275D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7588620-1

BMW E60 E90 325i 525i N53 218HP ECU Kit Control Unit DME 7588620 CAS3 Key Manual

£360.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129004114

Door Module Mercedes W204 W212 Rear Left N/S Control Unit A2129004114

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009821923-1

Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relays Set A0009821923

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9315682

Body Control Module BMW F20 F21 F30 F31 F32 Comfort Unit FEM ECU LR01 9315682

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3450286

BMW X3 E83 LCI N47 Earth Cable Flow Electric Battery Negative 3450286

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4L0959795B

Audi Q7 4L Door Control Module Unit ECU Rear Left N/S 4L0959795B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9227172

BMW X6 Series E71 ECU Body Control Module Junction Box PL4 9227172 61359227172

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3Q0907338C

Audi VW Seat Skoda Headlight Aim Range Control Unit Module ECU Xenon 3Q0907338C

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6429000401-1

Mercedes W166 ML350 Bluetec 4-Matic OM642.826 Engine ECU Kit Module A6429000401

£379.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A41CA2

Air Module BMW F45 F46 Mini F55 F56 F60 ECU Control Unit 5A41CA2

£189.95

Part no. 5Q0959393B

Audi A3 8V Front Door Control Module Unit Right O/S 5Q0959393B

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8506434-4

BMW E81 E84 E87 E90 LCI 18d 118d 318d N47 ECU Kit DDE 8506434 CAS3 Key Automatic

£218.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6907314

BMW 7 Series E65 Dynamic Drive Pump Wiring Loom Harness ARS Valve Block 6907314

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7810909

Mini Cooper D R55 R56 Diesel W16 1.6 ECU Engine Control Unit DDE 7810909 Manual

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3456952

MINI Cooper R55 LCI Footwell Light Module Unit High EKS PL3 FRM3R 3456952

£156.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9264974

BMW E81 E82 E87 E88 E90 E91 Front Seat Control Module 9264974

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6868251

Air Module BMW F01 F02 LCI F07 GT F10 F11 F13 ECU ICM Control Unit 6868251

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9069005501

Mercedes Sprinter W906 Central Lock Locking Control Unit Module ECU A9069005501

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5M5T14B192AA-1

Ford Transit Custom Mk8 Relay 4-Pin Black 12V 20A SET X2 5M5T-14B192-AA

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9187534

BMW E81 Body Control Module Unit ECU L2 PL2 JBBFEII 9187534

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129000004-2

SAM Module Mercedes W212 Fuse Box Relay Control Unit A2129000004

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7615981-4

Mini Cooper R55 R56 LCI N16 122HP Engine Control ECU DME 7615981 Automatic

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6874337

BMW F10 F20 F30 VDC Rear M Sport Suspension Control Unit Module 6874337

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6C0915441

Audi A1 8X Volkswagen Polo GTI 6C Battery Positive Terminal Jump Cover 6C0915441

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0915459E

Audi A4 B9 Battery Positive Terminal Cable Plus Pole Wiring Harness 8W0915459E

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. D1BT14D212NA

Ford Transit Connect Mk2 II Bluetooth Control Module Unit ECU D1BT14D212NA

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0937124A

Audi A4 B9 A5 F5 Q5 FY Fuse Box Control Module Relay Box 8W0937124A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2447802

Telematics Control Unit BMW F20 F21 F23 F30 F31 F32 Module ATM ECE 3G 2447802

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7928576

Audio Receiver BMW F40 G20 G30 Digital DAB Control Unit Module 7928576

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2079014200

Airbag Module Mercedes W207 C207 Coupe Air Bag SRS Control Unit ECU A2079014200

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8510829-3

BMW E90 E91 LCI 320d N47N Engine Basic DDE 8510829 Control Unit Manual

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779005505

Door Module Mercedes W177 W247 Rear Left Right N/O/S Control Unit A1779005505

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6965263

BMW 1 3 Series E82 E90 E92 Switch Cluster Cruise Control Stalk Unit 6965263

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8639595-12

BMW F30 F31 F32 328i 428i N20 245HP Engine Control ECU DME 8639595 Automatic

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-3416118

BMW X3 Series E83 2.0d 3.0d Instrument Cluster Speedo Clocks Diesel 3416118

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007401-2

Mercedes W204 C250CDI Blue Efficiency OM651.911 204HP Engine ECU A6519007401 Key

£161.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2049004306

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049004306

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6866990

Airbag Module BMW F01 F02 LCI F10 F11 F13 Air Bag ECU ICM Control Unit 6866990

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2075400710

Battery Cable Mercedes W204 W207 Starter Alternator Wiring Harness A2075400710

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469008115

Mercedes W176 W246 Gearbox Transfer Case Control Module Unit ECU A2469008115

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009006706

Mercedes W205 Adblue Module Exhaust Gas Control Unit ECU BlueTEC SCR A0009006706

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8671504

Starter BMW G20 G21 G30 G31 G01 Engine Starter Motor 8671504

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229002710

Tuner Box Mercedes W207 W212 W218 Digital Audio Control Unit DAB ECE A2229002710

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A4479060117

Mercedes Vito W447 Front Fuse Box Relay Control Unit Module A4479060117

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0959107AC

Audi A8 4D Tailgate Lift Boot Lid Control Unit Module Trunk 4H0959107AC

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V0971104

Audi A3 S3 8V Sportback Wiring Harness PDC Parking Sensor Rear Bumper 8V0971104

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059000524

Mercedes W207 W212 Telematics Services Communication Module A2059000524

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6841702

BMW X3 G01 Power Battery Distribution Junction Box Control Unit Rear 6841701

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7304593

Bi-Xenon Headlight BMW F07 F10 F11 Control Unit Module 7304593

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0937085R

VW Volkswagen Caddy Maxi 2K BCM Body Control Module Unit 5K0937085R

£80.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6856283

BMW F30 F31 Lane Change Wiring Sensor Module Master Right O/S HC-2 6856283

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9185532

BMW E87 LCI CCC CD Professional Navigation System Controller 9185532

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9861558-1

Rain Sensor BMW F20 F21 F30 F31 Windscreen Light Solar Condensation Unit 9861558

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6C0035577

VW Polo 6R Antenna Amplifier Rear Booster Boot Lid Tailgate Left N/S 6C0035577

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469008710

Mercedes W176 Sat Navi MMI Multimedia Radio CD Head Unit A2469008710

£208.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8506375-3

BMW E81 E87 E90 E91 LCI 118d 318d N47 Diesel ECU KIT DDE 8506375 CAS3 + Key

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9441865

Head Unit BMW F20 F21 F22 F30 F31 LCI Radio CD Player Navigation GPS 9441865

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7638477-1

BMW 1 3 5 Series E81 E87N LCI E90 E91 E92 F10 F11 Ignition Coil Haas 413110321

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8H0919475AB

AUDI A7 4G8 Parking Assist Sensors Distance Control Module 8H0919475AB

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9381102

BMW F20 F30 F36 Front Electronic Module Control Unit FEM 9381102

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6809316

BMW F10 F20 F23 F30 Telematics Module Bluetooth Communications Control 6809316

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8707676

BMW F22 F32 F36 Body Control Comfort Module Unit 8707676

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 443937105B-1

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574091

BMW F10 F11 520d N47N 184HP Engine Control Unit ECU DDE 8574091 Automatic

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6846906

BMW F20 F21 LCI Mini F55 F56 Top Hifi Audio Amplifier Harman Kardon 6846906

£246.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

£13.95

Free delivery: Aug 27

If paid before 14:00

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