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 W211 C219 Front Windscreen Rain And Light Sensor Rain-Light A2118702926

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9878327

Air Conditioning Module BMW G11 G20 G21 G30 Control Unit ECU 9878327

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9805533-1

Mini R60 Rear PDC Parking Sensor Royal Grey Metallic - A48 9805533 SET x2

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9257426

Fuse Box Grouping BMW F10 F11 Fuse Placement Map Card Diagram 9257426

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6J0035342E

Seat Altea 5P1 Media-IN Socket Multimedia Interface Module 5P0035341G

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9381113

Air Con Module BMW F20 F30 F31 Mini F55 F56 Air Conditioning A/C Unit 9381113

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6P0035225

Seat Ibiza Mk4 Keyless Entry Amplifier Aerial Antenna Module Unit 6P0035225

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8971030AM

Audi A5 8T Front Door Wiring Harness Loom Cable Passenger's Side 8T8971030AM

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2205400382

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0971226

Audi A6 C8 Positive Plus + Wiring Loom Cable Lead 4K0971226

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9231283-IBB

PDC Parking Sensor BMW X5 E70 F10 Ultrasonic Sensor Imperial Blue A899231283

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR014114

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

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0971537AA

Seat Arona Fr KJ7 Earth Line Alternator Negative Battery Cable 2Q0971537AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 504092575

Iveco Daily 3 Electrical Wire Earth Cable Battery Power Wiring 504092575

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8035225D

Audi A5 8T Audio Radio Aerial Amplifier Control Unit 8T8035225D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971499

Audi Q3 F3 VW Golf Mk7 Automatic Gearbox Wiring Loom Harness Cable 5Q0971499

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0045454140

Mercedes ML W164 W251 Door Wiring Joint Protective Cap Bracket

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8674261

Mini Cooper One F56 B38 1.5 102HP Engine Control ECU DME Kit 8674261 Manual

€165.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8570659

Wiring BMW X3 F25 N47N Engine Automatic Gearbox Module Wiring Harness 8570659

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971349BF

Audi TT Mk2 8J Alternator Charging Wire Cable 1.8 2.0 TFSI Petrol 8J0971349BF

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469005010

Mercedes W176 W246 Parktronic Parking Control Unit Module ECU A2469005010

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1775403742

Mercedes W177 Interior Roof Lining Wiring Loom Harness Cable Wire A1775403742

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. M8D2-14B673-AC

Range Rover Evoque L551 Tailgate Hands Free Control Module Unit M8D2-14B673-AC

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0959354A

Seat Leon Mk3 Door Crash Impact Sensor Front Left Right N/O/S 3Q0959354A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5J6971161BA

Skoda Fabia Mk2 5J Rear Door Wiring Loom Harness Cable Right O/S 5J6971161BA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9878658

BMW F20 F30 F31 LCI Mini F55 F56 Compensator LTE UK Control Unit Module 9878658

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8058634

Engine Wiring BMW X3 M F97 X4 M F98 Loom Harness Ignition Module 8058634

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7387549-2

BMW F32 Bi-Xenon Headlight Lamp Light AKL Wiring Cable Front Left N/S 7387549

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6F2971120P

Seat Ibiza Mk5 FR Front Door Wiring Harness Loom Wire Driver's Side 6F2971120P

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. M8D2-14N030-AA

Range Rover Evoque L551 Rear Fuse Box Relay Control Unit Module M8D2-14N030-AA

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2218201875

Mercedes W221 Aerial Antenna Control Unit Keyless Go Entry Module A2218201875

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9241006-1

BMW E89 Light LED Module Footwell Unit Lear FRM3R PL2 9241006

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0124625022

Mercedes Viano Vito W639 Alternator Generator 111 CDI Diesel Engine 0124625022

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0971250AL

Audi A3 8P Negative Battery Terminal Cable Wiring Battery Wire 1K0971250AL

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2118210197

Mercedes E-Class W211 Rear Door Wiring Loom Harness Rubber Grommet A2118210197

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018BP

Skoda Yeti Mk1 2.0 TDI 110HP CFHA Engine Control Unit ECU Kit 03L906018HJ Manual

€132.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0AM911023B

Volkswagen Scirocco Mk3 Starter Motor DSG Gearbox 1.4 TSI CAVD 0AM911023B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6913363

BMW E65 Glovebox Glove Box Dash Storage Wiring Harness Cable 6913363

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 99761826500

Porsche Cayman 987C Tilt Alarm Control Unit Module 99761826500

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9325552

BMW F06 Gran Coupe F12 F13 Parking Brake Wiring Loom Harness Cable 9325552

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2649001200

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

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9274276

BMW F07 Gran Tourismo Headlight Footwell Light Control Module FRMIII 9274276

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0035751

Audi A6 C8 Engine Sound Control Unit Module 4N0035751

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129005614-2

Mercedes A207 W212 W218 Radio Head Unit Navi CD Player Navigation A2129005614

€203.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8617709

BMW Mini Cooper F55 F56 Wiring Harness Motor Sensorsystem Module 8617709

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959795J

Audi A5 8T Rear Door Module Control Unit Module ECU Left Right N/O/S 8T0959795J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5C0959655D

Volkswagen Golf MK6 Air Module Control Unit ECU 5C0959655D

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3M5T-14A076-AC

Ford Focus Mk2 Under Hood Bonnet Fuse Box Cover Lid Trim Panel 3M5T-14A076-AC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5A0C047

BMW G20 G21 Front Door Wiring Loom Harness Cable Driver's Side 5A0C047

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6949382

BMW E65 E66 Rear Door Wiring Harness Loom Cable 6949382

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7PP919148A

Porsche Cayman 987 Cayenne 92A TV Tuner Reveiver ECU Control Module 7PP919148A

€612.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7PP959795T

Porsche Cayenne 92A Rear Door Control Module ECU Left Right N/O/S 7PP959795T

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9238195

Fuse Box Grouping BMW F10 F11 F12 Fuse Placement Map Card Diagram 9238195

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8579420-1

BMW F07 F10 F11 N47N Diesel Alternator Generator Engine 220A Valeo 8507625

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2139002817

Mercedes W177 W205 C257 Radar Sensor Front Control Unit Module A2139002817

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5F4971036M

Seat Leon Mk3 5F Door Wiring Loom Harness Front Passenger Side 5F4971036M

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059064405-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Left N/S A2059064405

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9453978

BMW G20 G21 G30 G31 Communication Wiring Harness Loom 9453978

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9171984

BMW E60 E61 E63 E64 LCI Control Unit Lane Departure Warning Module ECU 9171984

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0035223G

Audi Q7 4L Bose Sound System Audio Amplifier Amp Bose 4L0035223G

€379.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059007218-2

Mercedes GLC X253 Rear Trunk Lid Automatic Closing Lock Mechanism A2059007218

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2K7858247

VW Volkswagen Caddy SB Dashboard End Cover Cap Trim Left N/S Black 2K7858247

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6928267

BMW E65 E66 E67 Gateway Sensor Air Module Control Unit 6928267

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009827723

Fuse Relay Mercedes W176 W204 W246 4-Pin Unit Black Hella A0009827723

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1698207526

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009059300

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic White A0009059300

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2118703185

Mercedes W211 Door Module Rear Left N/S Control Unit ECU A2118703185

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0959655R

Seat Leon Mk3 5F Air Module Control Unit Sensor ECU 3Q0959655R

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8798189-1

Basic Head Unit BMW F45 X1 F48 Mini F55 F56 Sat Navigation Radio Stereo 8798189

€218.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7555188

BMW 5 6 Series F10 F11 F12 F13 Control Unit Box Cover 7555155

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR040553

Range Rover L405 Alternator Generator Wiring Loom Link CK5210C307CD

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0061511001

Starter Motor Mercedes W906 M272 Engine Diesel Bosch A0061511001

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CPLA-5B710-AB-1

Range Rover L405 Air Suspension Valve Control Unit Module CPLA-5B710-AB

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K6035577AD

Volkswagen VW Golf Mk5 Aerial Signal Amplifier Booster Antenna AM FM 1K6035577AD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2751444

Mini R56 DAB/IBOC Tuner Bracket Holder Mounting 2751444

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0915181

Audi Q5 8R Negative Battery Terminal Cable Wiring Battery 8R0915181

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907064CH

Audi A5 F5 BCM Body Comfort Onboard Control Module Unit ECU 8W0907064CA

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5945096C-2

Audi A6 C7 Rear Outer Taillight Lamp LED Wiring Harness Right O/S 4G5945096C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YWC000783

Land Rover Discovery 3 L319 Front Seat Memory Control Unit Module ECU YWC000783

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8570676-1

BMW F30 F32 LCI N57N N57Z Diesel Engine Alternator Generator 230A Valeo 8570675

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1695406409

Mercedes W169 W245 Battery Earth Negative Cable Wiring Loom A1695406409

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7634061

BMW F10 Engine Transmission Module Cable Loom Wiring Harness 7634061

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971095CA

Audi Q7 Front Bumper Wiring Loom Harness 4L0971095CA

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8489649-1

Mini Cooper F60 B38A15A 1.5 136HP ALL4 Engine ECU Kit DME 8489649 BDC Lock + Key

€526.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971348

Audi A4 B9 Gearbox Cable Wiring Loom Harness Manual Front Wheel Drive 8W0971348

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1638900144

Mercedes W163 Spare Wheel Carrier Fixing Plate Bracket Left N/S A1638900144

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7300267-2

BMW F01 F02 LCI Rear Tail Light Inner Wiring Harness Cable Plug Left N/S 7300267

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6700003722

Smart A453 Power Steering Rack Control Unit Module 6700003722

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1769069200-2

Mercedes W176 Front Right O/S Headlamp Light LED Wiring Cable A1769069200

€23.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 5H6035577T

VW Golf Mk8 Antenna Amplifier Rear Boot Lid Tailgate Right O/S 5H6035577T

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9313638

BMW F30 F31 F80 M3 Front Passenger Wiring Loom Harness Cables 9313638

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7LA971411E

VW Volkswagen Transporter T6 Power Steering Oil Sensor Wiring Harness 7LA971411E

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9225182

Rear Bumper Antenna BMW E93 E93N LCI Aerial Telephone 6970701

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CK52-971111-BC

Range Rover L405 Alarm Horn Siren Wiring Harness Cable CK52-971111-BC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906022RM-2

Audi A4 B8 A5 8T 2.0 TDI Quattro CAHA 170HP Engine ECU Kit 03L906022RM Manual

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971030E

Audi A4 B8 Front Door Wiring Harness Loom Cabling Passenger Side 8K0971030E

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

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