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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Mini F56 Front Door Wiring Harness Cable Driver Side 6809471

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. M8A2-13W030-KA-2

Range Rover Velar L560 Headlight Front Left N/S Harness Loom Wire M8A2-13W030-KA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2115455332

Mercedes C219 SAM Module Comfort Control Unit A2115455332

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9268438

BMW F10 F11 F01 F02 F03 Crash Impact Air Module Central Sensor Unit 9268438

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2118201526

Mercedes S211 Rear Door Control Module Left N/S A2118201526

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1698207526-1

Mercedes W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3AA953123

VW Volkswagen Passat B7 Indicator Bulb Socket Mount Bracket Holder 3AA953123

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2K0945111A-2

Volkswagen Caddy Mk3 Rear Tail Light Wiring Harness Cable Left N/S 2K0945111A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8844292

BMW X1 U11 High-Voltage Battery Module Connector Wiring Cable 8844292

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 012911023F

Volkswagen Touareg 7L Starter Motor Engine Diesel Bosch 012911023F

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8576341-6

BMW F20 F21 F30 F31 116d 316d 116HP N47N ECU Kit DDE 8576341 + Key + FEM Manual

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G0035222A

Volkswagen Golf Mk7 Media In Port Socket Connection Adapter 5G0035222A 5Q0035736

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8638585

BMW F20 F21 F30 F31 LCI Cable Alternator-Starter-Base B+ 8638585

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044400938

Mercedes C204 Electric Wire Harness Loom Cable Connector A2044400938

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0937545L

Audi A8 D4 Fuse Relay Battery Junction Box Connector Housing 4H0937545L

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0937501

Audi A4 B8 A5 8T A6 C7 Q5 8R Fuse Box Relay Module Connector Plug 8K0937501

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6812218

BMW X1 F48 Rear Left Right N/O/S Door Wiring Harness Loom 6812218

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2749060400

Mercedes W204 W212 C207 M274 OM651 Starter Motor Engine Starter A2749060400

€34.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8518269-6

BMW E90 E91 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key 8518269 Manual

€151.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8579479-2

BMW F20 F21 F30 116d 316d N47N 116HP Engine Control Unit ECU DDE 8579479 Manual

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0959754D

Audi A4 B8 A5 8T A6 C7 Remote Radio Alarm Key Button Control 868 MHZ 8T0959754D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6839821

Battery Cable BMW G01 G02 F97 F98 Positive Plus Pole Lead L= 712MM 6839821

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W7907468E

Audi S5 F5 Gateway Control Module Diagnostic Interface Unit 8W7907468E

€275.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2479007709

Front Camera Module Mercedes C118 W177 W247 Lane Assist Control Unit A2479007709

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2GA971395A

VW Volkswagen T-ROC A11 Front Door Ambiente Light Wiring Right O/S 2GA971395A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2229004213

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-13404-AG-2

Land Rover Discovery Sport L550 Tail Light Wiring Rear Right O/S FK72-13404-AG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6G9T-14K131-BB

Land Rover Discovery Sport L550 Fuse Relay Box 6G9T-14K131-BB

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0959795M

Audi A6 C6 Rear Door Left Right N/O/S Module Unit Control ECU 4F0959795M

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G2907311C-1

Audi A7 4G8 3.0 TDI CRTE 218HP Quattro Engine ECU Kit 4G2907311C BCM2 + 2 Keys

€664.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0959795Q

Audi A5 B8 8T Door Module Control Unit Left Right N/O/S 8T0959795Q

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3452285

BMW X3 Series E83 Boardmonitor Central Information Display Screen 6,5"

€256.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR040145

Land Rover Freelander 2 L359 Wire Wiring Harness Parking System DH5215K867BC

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-14D617-AB

Range Rover Evoque L538 Door Module Unit ECU Front Left N/S BJ32-14D617-AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AH42-14F041-AK

Range Rover L322 Body Control Module Fuse Relay Box AH42-14F041-AK

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9377149

BMW 1 3 Series F20 F21 F30 F31 Telematic Control Unit Module 9377149

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6396890279

Mercedes Viano Vito W639 Radio Fan Adapter Control Unit Module A6396890279

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8574091-6

BMW F10 F11 520d N47N 184HP Engine ECU Kit Unit DDE 8574091 CAS4 + Key Manual

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G8971029EM

Audi A7 4G Front Door Harness Wiring Loom Cable Driver's Side 4G8971029EM

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V4971035DQ

Audi A3 8V Front Door Wiring Harness Cable Driver Side 8V4971035DQ

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2479005709

Mercedes W177 W247 Electronic Control Unit Module Speedo Meter ECU A2479005709

€256.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9V4T-14B321-AA

Ford Kuga MK1 Air Module Control Unit ECU SRS 9V4T-14B321-AA

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8736251

BMW X4M F98 X4 G02 X3 G01 Rear Fuse Box Power Distribution Fuse Box 8736251

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055404797

Battery Cable Mercedes GLC X253 Starter Motor Alternator Wiring A2055404797

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6820931

Telematics Module BMW X1 F48 F20 F30 Bluetooth GPS Control Unit ECU 6820931

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971227B

Audi A4 S4 8W A5 S5 F5 Battery Wiring Harness Rear Distributor 8W0971227B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0005406904

Mercedes X253 Ground Line Battery Earth Cable Wire A0005406904

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YLE500200

Land Rover Discovery 3 L319 Alternator 150A 2.7 TDV6 YLE500200

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0907443

Porsche Cayenne S 92A Engine Control Module Securing Bar Cover 7P0907443

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. K8D2-9E729-EB

Land Rover Discovery Sport L550 Radar Sensor Bracket Mount Support K8D2-9E729-EB

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9359248

BMW MINI Cooper One F55 Cable Harness Door Right O/S Loom Driver Side 9359246

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7177697-3

Plug Socket BMW E61 LCI Rear Lamp Touring Trunk Lid Wiring Left N/S 6984746

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G4971694R

Volkswagen Golf Mk7 Rear Door Wiring Loom Harness Cable Right O/S 5G4971694R

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0941003C-2

Audi A6 C6 Headlamp Headlight Front Left N/S Harness Wire Loom Cable 4F0941003C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6974245

BMW MINI Cooper Clubman R55 R55N LCi Retaining Bracket Safety Belt Rear Left N/S

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8506666

Mini Cooper D R60 ALL4 N47N Diesel Engine Control Unit ECU DDE 8506666 Manual

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2079001100

Door Module Mercedes C207 W207 Front Left N/S Control Unit ECU A2079001100

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 99161032100

Porsche 718 Boxster 982 Battery Fuse Box Control Unit Socket Plug 99161032100

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8574091-3

BMW F10 520d N47N 184HP ECU Kit Control Unit DDE 8574091 CAS4 + Key

€151.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2709000900-7

Mercedes W246 B180 270.910 122HP BlueEffi Engine ECU A2709000900 Automatic

€327.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2S6T-14A076-BA

Ford B-Max Fiesta Mk6 Fuse Box Cover Housing Lid Trim Cap 2S6T-14A076-BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-14B687-CD

Range Rover L405 Rear Seat Heated Wiring Harness Cable Right O/S CK52-14B687-CD

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9271216

BMW X3 F25 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9271216

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1699002000

Head Unit Mercedes W169 W245 CD Player Radio Audio A1699002000

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AH42-18C815-AH

Range Rover L322 Radio Recevier Control Unit Module AH42-18C815-AH

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7394651

BMW 5 F11 Touring Rear Boot Trunk Lid Tailgate Control Unit Module ECU 7333928

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0915181L

Audi Q3 8U Q3 S3 VW Scirocco Mk3 Battery Wiring Wire Negative Cable 1K0915181L

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971365G

Audi A5 F5 Seat Belt Warning Wiring Harness Cable Front Left N/S 8W0971365G

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8643741-2

BMW X1 E83 Z4 E89 20i N20 184HP sDrive Engine Control ECU 8643741 Automatic

€208.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7631932

Engine Wiring BMW F30 F31 N20 Loom Module Harness Cable 7631932

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A3BC98-1

BMW G20 LCI Rear Outer Light Lamp Side Panel Wiring Cable Right O/S 5A3BC98

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469003014

Mercedes W176 W231 W246 Electric Parking Brake Control Unit Module A2469003014

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9284331-3

Roof Light Mini R55 R56 R60 R61 Operating Control Unit Switch 3455632

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8617710

Mini F45 F56 B38 Petrol Engine Wiring Loom Harness 8617710

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6928461

BMW E46 E60 E61 E63 E81 E87 E90 E91 X3 E83 X5 E53 E70 Bluetooth Antenna 6928461

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1179061800-1

Mercedes CLA C117 Rear Tail Light Lamp Wiring Harness Right O/S A1179061700

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9389258

Mini F55 Rear Door Wiring Loom Harness Cable Left Right N/O/S 9359266

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2049005915

Mercedes W204 Radio Media Navigation Sat Nav Head Unit A2049005915

€203.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906022MK-2

Audi A4 B8 Engine Control Unit ECU Kit 2.0 TDI Diesel CAGA Autoamtic 03L906022MK

€246.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HPLA-14A073-BC

Range Rover Sport L494 Dashboard Fuse Box Control Unit Module HPLA-14A073-BC

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7488140

BMW F10 F20 F21 F30 F31 LCI SCR Control Module ECU Unit 7488140

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L6971121P

Volkswagen Touareg 7L Front Door Wiring Loom Harness Driver's Side 7L6971121P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9875929

BMW F20 F21 F22 F23 LCI DAB Navigation Head Control Unit Module Business 9875929

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 46868440

Vauxhall Movano C Gearbox Wiring Harness Loom 2.2 Diesel Manual 52233139

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9234606

BMW X5 E70 X6 E71 Camera Based System Control Unit Module 9234606

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7110854

BMW Z4 Series E85 Roadster Head Lamp Cleaning Device Container 7110854

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9150883

BMW 3 E93 Convertible Boot Trunk Lid Tailgate Wiring Loom Harness Cables 9150883

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044400738

Mercedes C204 Electric Wire Harness Loom Cable Connector A2044400738

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469005515

Mercedes W176 Rain Light Sensor Control Unit Front Windscreen Camera A2469005515

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8380944-1

BMW E46 E65 E66 E67 Aerial Antenna Amplifier Radio Signal Trap Circuit 8380944

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0971371

VW Volkswagen Golf Mk7 Positive Battery Terminal Cable Lead Wiring 5Q0971371

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6981142

Window Lifter Motor BMW E60 E61 Drive Actuator Front Right O/S 6981142

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DV21-12A650-PB

Ford B-Max 1.0 EcoBoost 100HP Engine Control Unit ECU DV21-12A650-PB Manual

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03C906026AD

Audi A1 8X 1.4 TFSI CTHG 185HP Engine ECU Kit BCM + Key 03C906026AD Automatic

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0959792F

Audi A1 8X Front Door Control Module Unit Passenger Side 8X0959792F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9317092

Mini One F55 F56 Cable Electric Automatic Hold Brake Handbrake 9317092

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8579480-1

BMW F20 120d F30 320d F10 520d N47N 184HP Engine Control Unit DDE 8579480 Manual

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1729051301

Mercedes SLK R172 Roadster Antenna Amplifier Control Module A1729051301

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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