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 R50 R53 Front Door Wiring Harness Cable Loom Right O/S 6915574

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KPLA-10C814-AC

Land Range Rover Sport L494 Battery Clamp Hold Down Left N/S KPLA-10C814-AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6938221

BMW 3 Series E90 E91 Wiring Loom Front Door Left Passenger Side 6938221

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. N9D3-14D619-AA

Range Rover Velar L560 Door Control Unit Module ECU Rear Left N/S N9D3-14D619-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9260600

BMW F30 Interior Wiring Harness Cable Loom Plastic Plug Socket Connector 9260600

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8574100-3

BMW X3 F25 30dX N57N 258HP Engine Control ECU Kit DDE 8574100 Automatic

€218.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 226334803R

Renault Trafic 3 Vauxhall Vivaro B 1.6 DCI Engine Wiring Loom Cable 226334803R

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2K5971692A

Volkswagen Caddy Maxi Mk4 Sliding Door Wiring Loom Harness Right O/S 2K5971692A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3427749

BMW X3 E83 Cable Loom Door Passenger Side Wiring Harness 3412570

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0959793

Audi A5 8T Door Module Control Unit ECU Front Driver's Side 8K0959793

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9374507-1

BMW F23 REM Rear Electronic Module Fuse Box Control Unit V2 9374507

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7796127

BMW X5 X6 Series E70 E71 Diesel Battery Cable Starter-Base B+ 7796127

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0941597F

VW Volkswagen Caddy 2K Headlight Headlamp Ballast Module Control Unit 8K0941597F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6511598940

Mercedes W205 C253 Battery Harness Wire Holder Bracket Cable Duct A6511598940

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR087661

Land Rover Range Rover Evoque L538 Ignition Smart Key Remote 434 MHZ LR087661

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q2971111AN

VW Volkswagen Golf Gtd Power Steering Rack Wiring Harness Loom Wire 5Q2971111AN

€118.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8367769

BMW X3 Series E83 Battery cable holder mounting parts B Base 8367769

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-14A073-AC-1

Range Rover L405 Fuse Relay Box Housing Diesel CK52-14A073-AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7838113

BMW F06 S65 Engine DME Basic Control Module Unit ECU PL6 JBBFE III 7838113

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DW93-14A076-AA

Range Rover Evoque L538 Fuse Relay Box Battery Terminal DW93-14A076-AA

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR021530

Land Rover Discovery 4 L319 Front Seat Module Control Unit AH22-14D600-AD

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9354752

Mini F54 F55 F56 F57 Head-Up Display HUD Projector Dashboard Screen 9354752

€165.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6519064300

Mercedes W205 Diesel OM651 Engine Starter Motor Actuator Bosch A6519064300

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971687AC

Audi A4 B8 Door Wiring Harness Cable Loom Rear Left N/S 8K0971687AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FW93-14F012-BF

Land Rover Discovery Sport L550 Tyre Pressure Control Unit TPMS FW93-14F012-BF

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8506444-3

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8506444 CAS3 + Key

€256.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8783805

BMW F23 LCI Boot Lid Tailgate Wiring Wire Harness Cable Loom 8784903 8783805

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. JK2T-19L540-AB

Ford Transit Custom Load Door Wiring Harness Cable Loom Left N/S JK2T-19L540-AB

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9426325

BMW F45 G20 G30 Mini F60 Battery Cell Module Circuit Control Unit 9426325

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0035724-1

Skoda Octavia 5E VW Tiguan Transporter AUX Port Socket Outlet 5Q0035724

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR007753

Land Rover Freelander L359 Alternator Support Bracket Mount 2.2 CRDI 9661310080

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9276096

BMW 5 6 7 Series F01 F10 F13 Antenna Aeral Amplifier Diversity 868 MHZ 9276096

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6394460132

Mercedes Vito Viano W639 Side Sliding Door Control Unit Module A6394460132

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1Z0971121DL

Skoda Octavia II Door Wiring Harness Passenger Door Loom Cable 1Z0971121DL

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. NAD500080

Land Rover Discovery 3 L319 2.7 TDV6 Starter Motor Manual DENSO 12V NAD50008

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9123043

BMW E81 E87 E91 LCI Steering Column Switch Cluster Wiper Stalk 9123043

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971349K

Audi A4 B9 A5 F5 Three Phase Alternator Wiring Loom Harness Cable 8W0971349K

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2045401434

Mercedes W204 OM642 Alternator Starter Wiring Harness Cable A2045401434

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W6945094AA-1

Audi A5 F5 Rear Tail Light Matrix Lamp Inner Wire Cable Right O/S 8W6945094AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8379567

BMW X5 Series E53 Loudspeaker Stereo Left Front Door N/S 8379567

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. M8A2-14687-AB

Range Rover Velar L560 Rear Door Wiring Loom Harness Left N/S M8A2-14687-AB

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0971228L

VW Golf MK5 6 Audi A3 8P Positive Battery Terminal Cable 1K0971228L

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9166869

Mini Cooper R56 Hands-free Electronics Charging MULF2 9166869

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0959655F

Porsche Cayenne 92A Air Module Control Module Unit ECU 7P0959655F

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9367807-1

BMW X5 F15 Battery B+ Positive Terminal Point Engine Compartment 9367807

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4L2910401B

Audi Q7 4L Engine ECU Control Unit 239 HP 3.0 TDI CASA 4L2910401B Automatic

€408.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. K8D2-14N178-AD

Range Rover Evoque L551 Battery Wiring Harness Cable 2.0 K8D2-14N178-AD

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7810860-1

BMW 3 Series E90 E91 E92 E93 LCI N47N Engine Alternator Starter Cable B 7810860

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6G9T-14B192-CA-1

Ford Fiesta Transit Mk7 Relay 4-Pin Black FoMoCo Unit SET X2 6G9T-14B192-CA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9244417

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9244417

€322.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059004021

Mercedes W205 GLC X253 Door Module Control Unit Front Left N/S A2059004021

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9353217

BMW X6 F16 Antenna Amplifier Aerial Diversity Booster Control Unit 9353217

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BA6T-18B955-BB

Ford Fiesta Mk7 Dashboard Panel Display Monitor Screen Unit BA6T-18B955-BB

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9499002

BMW F20 F21 F22 F30 F31 F32 F36 Fuse Box Body Control Unit Module REM V2 9499002

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-19G255-AA

Range Rover L405 Amplifier Aerial Receiver Unit Right O/S Upper BJ32-19G255-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6920472

BMW 7 Series E65 E66 E67 Sensor Vehicle Centre AIRBAG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7E0971794D

Volkswagen Transporter T6 Cable Wiring Harness Positive Plus 7E0971794D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A08530

Fuel Pump Control BMW G30 G12 Mini F60 Tank Function Module Unit ECU 5A08530

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9371386

BMW 4 Series F33 F83 M4 Convertible Top Module CTM Unit 9371386

€108.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8373700-2

BMW E60 E63 E87 E90 E91 4X Relay Make Contact White Green Set 8373700

€25.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025427219-1

Mercedes W169 W245 W204 W212 Relay 4-Pin Black Hella SET A0025427219

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. R171-SCREEN

Mercedes B200 R350 S300 W203 W211 Multimedia Display Screen Unit Dashboard

€132.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3G0971641B

VW Volkswagen Passat B8 Center Console Wiring Loom Harness Cable 3G0971641B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9185542

BMW X5 E70 CCC Radio CD Player Navigation 9185542

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GK62-18808-AB

Land Rover Range Rover Sport L494 Rear Subwoofer Bass Speaker GK62-18808-AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9327318

BMW 1 2 3 4 5 F10 F20 F22 F30 F32 Navigation Sat Nav DAB Head Unit High 9327318

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2215408335

Mercedes W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215408335

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9337231

BMW F32 F33 F82 F83 Door Wiring Loom Harness Passenger's Side 9337231

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2229009507

Mercedes W205 C217 W222 Airmatic Air Suspension Control Module Unit A2229009507

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0906259K-1

Audi A5 F5 2.0 TFSI DDWA 245HP Quattro Engine ECU Kit 8W0906259K Automatic

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GK2T-18B955-GE

Ford Transit Custom Multimedia Display Screen GK2T-18B955-GE

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2139065604

Mercedes W205 W213 C253 Navigation Map Memory Card A2139065604

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9134631

Seat Module BMW E65 E66 Front Seat Control Unit ECU 9134631

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2Q0959659

Audi A1 GB VW Polo AE Taigo CS Taigun CW Front Impact Crash Sensor 2Q0959659

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-19H440-BG

Land Rover Range Rover Evoque L538 Keyless Start Control Module Unit BJ32-19H440

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6913363

BMW E65 Glovebox Glove Box Dash Storage Wiring Harness Cable 6913363

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V7035225B

Audi A3 8V Antenna Amplifier Rear Right O/S 8V7035225B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7806042

Mini R55 R56 Connecting Wiring Cable Cooper D W16 Diesel 7806042

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1669003407

Mercedes W176 W204 Digital Audio DAB Receiver Control Unit Module A1669003407

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0907279D

Audi Q7 4L Comfort Control Module Unit ECU 4F0907279D

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8508208-1

BMW F10 F11 520d 530d N47N N57 E-Box Control Unit Box 8508208

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T8971030AQ

Audi A5 8T Front Door Wiring Harness Loom Cable Passenger's Side 8T8971030AQ

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4E0919063

Audi A1 8X A3 8V Door Light Emitting Diode Mount Bracket LED Module 4E0919063

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2382879

Mini R58 Dashboard Sat Nav Navigation Display Screen 2382879

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-148006-AA

Land Range Rover L405 L538 Air Module Crash Impact Sensor BJ32-148006-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1729003406

Mercedes SLK R172 Roadster Soft Top Folding Roof Control Module A1729003406

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5H32-14633-AA

Range Rover L320 Door Wiring Loom Harness Cable Rear Left N/S 5H32-14633-AA

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-14D617-AC

Land Rover Freelander 2 L359 Door Module Passenger Side Front BJ32-14D617-AC

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR079256

Land Rover Discovery Sport L550 L494 L538 Jaguar XF Alternator GX73-10300-DE

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A2D553

Audio Receiver BMW F40 G22 G30 G31 X3 G01 DAB ECE Control Unit Module 5A2D553

€73.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0045468540

Mercedes W221 Distributor Box Block Control Unit Relay A0045468540

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9226357-1

Loudspeaker BMW F20 F30 Top-HiFi Door Speaker Tweeter Set Harman Kardon 9226357

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0937503

Audi TTS 8J Fuse Relay Box Bracket Mount Frame 8J0937503

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2Q0907685G

Skoda Octavia Mk4 NX Lane Change Assist Module Control Unit Left N/S 2Q0907685G

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8F0971029AL

Audi A5 8F Front Door Electric Wiring Loom Harness Driver's Side 8F0971029AL

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044405935

Mercedes W204 Door Card Harness Loom Cable Wiring Front Left N/S A2044405935

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07K971082F

Audi RS3 8V 8Y RSQ3 F3 Wiring Harness Injectors 2.5 TFSI Petrol 07K971082F

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

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