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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Battery Cable BMW X3 F25 Wire Lead Positive Alternator Starter B+ 9243645

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0101543202

Mercedes W202 W208 R129 Alternator 14V 115A 0101543202 0123510068

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6395400150

Mercedes Vito W639 Battery Terminal Fuse Box Control Unit Module A6395400150

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2038000178

Mercedes-Benz C CLK Class W203 C209 Vacuum Solenoid Valve A2038000178

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6911922

BMW Z4 E85 E86 Interior Fuse Power Distribution Box 6911922 8384629

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F1971687S

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971687S

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1765401602

Mercedes W176 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1765401602

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9315682

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

€104.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2661539779-2

Mercedes W169 W245 M266.920 95HP Engine Control ECU Kit A2661539779 Manual

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055409591

Mercedes W205 Door Wiring Loom Harness Cable Rear Right Left N/O/S A2055409591

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5G4971694T

Volkswagen Golf Mk7 VII 5G Rear Door Wiring Loom Harness Right O/S 5G4971694T

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7621178

BMW E81 E87 LCI E90 N43 120i 320i Engine Control Unit ECU DME 7621178 Manual

€85.95

Free delivery: Sep 14 – 15

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Part no. A0035420219-2

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219

€23.95

Free delivery: Sep 14 – 15

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Part no. 9141446

BMW E93 Cabrio Convertible Hydraulic Pump Power Supply Cable 9141446

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6399003000

Door Module Mercedes Vito W639 Front Right O/S Control Unit ECU A6399003000

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6947817

BMW E65 E66 IDrive Control Unit Front Centre Console Module ECU 6947817

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779001704

Mercedes V177 Door Module Rear Right Control Unit A1779001704

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0953549A

Audi S6 C6 Steering Column Wiper Switch Stalk Cruize Control 4F0953549A

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9298961

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9298961

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. LR036132

Range Rover L405 Engine Wiring Loom Harness Cable 4.4 Diesel CK52-9H589-AC

€218.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7516404

BMW E60 Cable Starter Generator Alternator B+ Base Wire Harness 7516404

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0907530AH

Audi A3 S3 RS3 8V Gateway Control Module GW MQB Mid Unit ECU 5Q0907530AH

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6858547

BMW X3 F25 ICM Control Unit Air Module SRS ECU 6858547

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0907530Q

Gateway Control Module Audi A3 8V Volkswagen MK7 ECU Unit 5Q0907530Q

€23.95

Free delivery: Sep 14 – 15

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Part no. A2115408445

Gateway Module Mercedes W169 W211 W245 W219 W203 Control Unit ECU A2115408445

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P0035785-1

Audi A3 8P Multimedia Interface Unit Module Bracket Mount 8P0035785

€23.95

Free delivery: Sep 14 – 15

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Part no. A2219000100

Mercedes W221 Digital Audio DAB Receiver Control Unit Module A2219000100

€28.95

Free delivery: Sep 14 – 15

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Part no. 4H0907801E

AUDI A7 4G8 Electric Handbrake Control Module TRW 4H0907801E

€23.95

Free delivery: Sep 14 – 15

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Part no. 5E5035577B

Skoda Octavia 5E Antenna Amplifier Aerial Control Module Unit 5E5035577B

€23.95

Free delivery: Sep 14 – 15

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Part no. 8580165

Mini F54 F55 F56 F57 F60 B47 Wiring Harness Engine Glow Plug Module 8580165

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0045450201

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3Q0959651

Seat Leon Mk3 5F Deployment Crash Impact Sensor Front Centre 3Q0959651

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8614276

BMW F20 F21 F30 LCI M140i 340i Alternator Generator 180A BOSCH 8614276

€37.95

Free delivery: Sep 14 – 15

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Part no. A1669005811

Door Module Mercedes W176 W246 Front Right O/S Control Unit Module A1669005811

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W1959593

Audi Q5 FY Front Door Control Module Unit Right O/S Side 8W1959593

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009822523

Mercedes W156 W242 W246 W447 Relay 4-Pin Black Hella A0009822523

€23.95

Free delivery: Sep 14 – 15

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Part no. 9113355

BMW E87N E90 E91 Mini Cooper R56 DC/DC Torque Converter Wandler 9113355

€23.95

Free delivery: Sep 14 – 15

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Part no. A2465401850

Prefuse Box Mercedes W176 OM607 Fuse Relay Control Unit A2465401850

€23.95

Free delivery: Sep 14 – 15

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Part no. A2118209626

Mercedes W211 W219 Alarm Control Module Unit ECU A2118209626

€23.95

Free delivery: Sep 14 – 15

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Part no. A2469012504

Mercedes W176 W246 Rain Sensor Light Control Unit Front Windscreen A2469012504

€23.95

Free delivery: Sep 14 – 15

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Part no. A0035464240

Mercedes W906 Distributor Box Battery Cable Unit A0035464240

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7810863

Battery Cable BMW X3 F25 Wire Lead Positive Alternator Starter B+ 7810863

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8621190

BMW F20 F22 F30 LCI Electric Line Cable Power Distribution Module 8621190

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9188377

BMW F01 KaFAS Camera Front Windscreen Lane Departure Camera Module 9188377

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P4945095E-3

Audi A3 8P Trunk Lid Tail Lamp Light Wiring Cable Rear Left N/S 8P4945095E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6974631

BMW Z4 Z3 Series E36 E85 Module Radar Burglar Alarm Sensor

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009822723

Mercedes W205 Estate Fuse Relay Box Module Control A0009822723

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1728202989

Mercedes SLK R172 Roadster Antenna Amplifier Control Module A1728202989

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6958447

BMW 7 Series E65 Control Unit Door Rear Passenger Side Hinten Low BFT 6958447

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6837092

BMW G30 G12 Fuse Relay Box Rear Trunk Power Distribution B + Box Basis 6837092

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8570673-2

Alternator Generator BMW F07 F10 F11 FN57N N57Z Diesel Engine Valeo 8570673

€70.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. 4F1971035N

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

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009004007

Mercedes W204 W222 Fuel Pump Control Unit Module A0009004007

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9348358

BMW E60 Body Comfort Control Unit DDE Module ECU 9348358

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7473684

Door Cable BMW F25 F26 Right O/S Wiring Loom Harness Handle Light Lamp 7252538

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6920472

BMW 7 Series E65 E66 E67 Sensor Vehicle Centre AIRBAG

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6C0907361E

Fuse Box Audi A1 Seat Ibiza Control Module Relay Box 6C0907361E

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0907468AC

Audi A8L 4H Gateway Control Module Unit 4H0907468AC

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6925945

BMW 5 Series E60 E61 Rear Left Right Door N/O/S Wiring Cable Harness Loom

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6M5Y-12A650-AF

Ford Focus St Mk2 Engine Control ECU 226HP Petrol Manual Gearbox 6M5Y-12A650-AF

€313.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2048700594

Radio Player Mercedes-Benz W204 COMAND Navi CD Head Unit A2048700594

€132.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8506199-3

BMW E60 E61 LCI 520d Diesel N47 Engine ECU Kit DDE 8506199 CAS 3 + Key

€170.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2545289-1

Ford Transit Mk7 Alternator Generator 2.2 TDCI CC1T-10300-CE

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3450343

Ultra-sonic Alarm Mini Cooper R55 R56 System Module 3450343

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9330951

Control Unit BMW F01 F07 F10 F11 F25 Air Module ECU Unit Continental 9330951

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2058700210

Mercedes W205 Front Seat Ocuppancy Mat Control Module ECU Left N/S A2058700210

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2650917

Ford Transit Connect Engine Alternator Generator Unit Diesel KK3T-10300-BB

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9290358

Navigation Head Unit BMW F10 F11 F31 Harman Sat Nav Unit 9290358

€365.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0005457616

Mercedes R171 VDO Transmission Control Unit Module EGS A0005457616

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A4478260000

Mercedes Vito W447 Headlight Turn Indicator Light Socket Plug A4478260000

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9395173

BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9395173

€189.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P3035223B

Audi S3 8P Audio Sound System Amplifier Bose 290328

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469052602

Dashboard Panel Mercedes W176 W246 Switch Dynamic Select Start/Stop A2469057902

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8679817

BMW F98 Earth Ground Cable Negative Battery Lead Wiring 8679817

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1645400350-1

Mercedes ML W164 Fuse Prefuse Box Jump Start Terminal A1645400350

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0951253

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins 8K0951253

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6945147

BMW 5 6 Series E60 E61 E63 Passenger Door Airbag Control Module 6945147

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7807802-1

BMW X5 E70 LCI X6 E71 N57 N57S Cable Alternator Starter Base B Wiring 7807802

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. DH22-14B192-EA

Land Rover Discovery Sport L550 Relay 4-Pin Unit 12V 70A Grey DH22-14B192-EA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6998487

Airbag Module Mini F55 F56 F60 BMW X1 F48 F45 ECU Control Unit Air Bag 6998487

€142.95

Free delivery: Sep 14 – 15

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Part no. A1645403230

Mercedes ML W164 Positive Battery Terminal Cable Lead Wiring A1645403230

€37.95

Free delivery: Sep 14 – 15

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Part no. 9390018

Audio Amplifier BMW F20 F21 LCI Mini F55 F56 Top Hifi Harman Kardon Unit 9390018

€313.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1679003504

Ignition Switch Mercedes W177 Electronic Anti Theft Control Module A1679003504

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6952994

Air Module BMW E60 E63 Control Unit Centre Sensor ECU 6952994

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5G0035953D

Volkswagen VW Passat B8 Voltage Converter Control Unit Module ECU 5G0035953D

€23.95

Free delivery: Sep 14 – 15

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Part no. 5N0035341C

Volkswagen Scirocco Mk3 Multimedia Interface Module Box 5N0035341C 5N0035342B

€23.95

Free delivery: Sep 14 – 15

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Part no. A1725407805

PDC Wiring Mercedes R172 Parktronic Parking Sensor Cable Rear A1725407805

€32.95

Free delivery: Sep 14 – 15

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Part no. 7838656

BMW 3 Series E90 E91 E92 M3 Engine Alternator Generator Valeo 180A 7838656

€61.95

Free delivery: Sep 14 – 15

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Part no. 3Q0906121B

Audi A3 8V 30 TDI DGTE Diesel Fuel Pump Module Control Unit ECU 3Q0906121B

€23.95

Free delivery: Sep 14 – 15

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Part no. A6395407809

Wiring Loom Mercedes W639 Vito Cable Sliding Door Rear Left N/S A6395407809

€23.95

Free delivery: Sep 14 – 15

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Part no. 6837359

Air Module BMW F01 LCI F07 F10 F11 F22 F25 Control ECU 6837359

€23.95

Free delivery: Sep 14 – 15

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Part no. 9264636-1

BMW 1 3 4 F20 F30 F32 1 Driver Side Seat Wiring Loom Electric Harness 9339286

€23.95

Free delivery: Sep 14 – 15

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Part no. 8E0907637B

Audi A6 C6 Yaw Module Rotation Rate Acceleration Sensor 8E0907637B

€23.95

Free delivery: Sep 14 – 15

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Part no. 4K0919390F

Audi A6 C8 Door Panel LED Module Light Unit Rear Right O/S 4K0919390F

€28.95

Free delivery: Sep 14 – 15

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Part no. 5Q0919283F

Parking Distance Audi A3 8V TT Mk3 Seat Leon MK3 Control Module 5Q0919283F

€23.95

Free delivery: Sep 14 – 15

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Part no. 9337219

BMW 3 Series F32 F82 M4 Wiring Loom Front Door Cable Passenger Side 9337221

€23.95

Free delivery: Sep 14 – 15

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Part no. A2199001100

Mercedes W219 Head Unit CD Player Navigation COMAND Radio Audio Unit A2199001100

€294.95

Free delivery: Sep 14 – 15

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Part no. A2469005315

Transmission Module Mercedes W176 OM607 Diesel Control Unit A2469005315

€32.95

Free delivery: Sep 14 – 15

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Part no. CV1T-14B531-AG

Ford Fiesta MK7 Door Module Front Driver Side Control Unit CV1T-14B531-AG

€23.95

Free delivery: Sep 14 – 15

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