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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Audi A8 D3 Radio Audio Sound Amplifier Tuner Harman Becker 4E0035061D

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YND500070

Land Rover Discovery 3 L319 Rear Lamp Socket Wire Right O/S 5H22-14N014-AA

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 99761821001

Porsche 987C Alarm Anti Theft System Control Module Unit 99761821001

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2518701889

Antenna Amplifier Mercedes W164 W251 Aerial Control Unit Module A2518701889

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469005312

Mercedes X117 X156 W246 Relay Control Unit Module A2469005312

€75.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 7P0959655F

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

€89.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 9281714

BMW F83 Camera Kafas Front Windscreen Camera 9281714

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0937124A

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5971693

Audi A6 C7 4G Rear Door Card Harness Loom Cable Wiring Left N/S 4G5971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 510971693J

Volkswagen Golf Sportsvan Door Harness Rear Left N/S Door Wiring Loom 510971693J

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 059911021D

Audi A5 8T Starter Motor 3.0 TDI CCWA Diesel 059911021D

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 06H911021A

Audi A5 8T 2.0 TFSI Petrol Engine Starter Motor Actuator 06H911021A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. JK2T-14B446-ACB

Ford Transit Custom Front Bumper Wiring Loom Harness Alarm Cable JK2T-14B446-ACB

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9065460643-1

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1Z0971121DL

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

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971226

Audi TT 8J Negative Battery Cable Lead 8J0971226

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 6834171

BMW G30 G31 Seat Wire Harness Cable Loom Front Left N/S 6834169 6834171

€165.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9154128

BMW Mini Cooper One R56 Front Left Passenger's Door Wiring Harness N/S 9154128

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6944290

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

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 5N0035341B

Volkswagen Golf 5 Multimedia Interface Module Box 5N0035341B

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A0009050338

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050338

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 95230-4H200

Hyundai H-1 iLoad Relay Module Control Unit ECU 95230-4H200

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2139065604

Mercedes W205 W213 C253 Navigation Map Memory Card A2139065604

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9360372

BMW X6 F16 Fuse Box Power Distribution Relay Control Unit Box Rear 9360372

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2189009003

Mercedes CLS C218 Front Headlight Xenon Ballast Control Module Unit A2189009003

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3AA919041

VW Sharan 7N Voltage Stabilizer Converter Electric Control Unit Module 3AA919041

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5WB959107B

Audi Q2 GA Rear Boot Trunk Lid Tailgate Control Unit Module ECU 5WB959107B

€70.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A4475401755

Earth Ground Cable Mercedes Vito W447 Positive Battery Lead Wiring A4475401755

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971228K

Audi A3 8V 1.5 TFSI DPCA Positive Battery Cable Lead Clamp Wire Loom 5Q0971228K

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 5N0945094H-2

Volkswagen Tiguan 5N Rear Tail Light Wiring Harness Cable Right O/S 5N0945094H

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 3G0971641B

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

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8K1907115M

Audi A4 B8 A5 8T 1.8 TFSI CDHB 160HP Engine Control ECU 8K1907115M Automatic

€151.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 7794911

BMW E87 E90 E91 Cable Alternator Starter Base B 7794911

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8C113C190AB

Ford Transit Mk7 Yaw Rate Speed Control Unit Sensor Meter 8C113C190AB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229009507

Mercedes W205 C217 W222 Airmatic Air Suspension Control Module Unit A2229009507

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9075401805

Mercedes Sprinter W907 Battery Terminal Unit Connection Box A9075401805

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. GK2T14B144GA

Ford Transit Mk8 VI Fuse Box Module Positive Battery Terminal GK2T-14B144-GA

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. GK2T-18B955-GE

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

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9G9T-14B533-JC

Ford Galaxy Mondeo Mk4 Front Door Control Module Passenger's Side 9G9T-14B533-JC

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7640132-4

BMW F20 F30 Mini F56 Alternator Generator 150A Denso 7640131

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8035464

Audi A5 8T Radio Amplifier Mounting Bracket Holder Support Plate 8T8035464

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03C906016G

Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU 03C906016G Automatic

€89.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8H0035464B

Audi A4 B7 Engine Control Unit ECU Module Bracket Holder Retainer 8H0035464B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BJ32-15K866-CE

Land Rover Range Rover Evoque L538 PDC Parking Sensor Module BJ32-15K866-CE

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7561834-13

BMW E87 E90 120i 320i N46 150HP Engine Control DME Module 7561834 Automatic

€123.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0035720B

VW Volkswagen Golf R Mk7 Road Toll Sender Receiver Cover Lid Top 4F0035720B

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7H0937087F

Volkswagen Transporter T5 Body Control Module BCM SME RBG 7H0937087F

€379.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K903015B

VW Volkswagen Golf Mk7 Alternator Generator 2.0 TSI Petrol Engine 06K903015B

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8602991

Mini F54 F55 F56 F57 F60 Battery Wire Cable Negative Earth Lead 8602991

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9380883

BMW F20 F21 F30 F31 Control Unit Air Conditioning A/C Module 9380883

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9353217

BMW X6 F16 Antenna Amplifier Aerial Diversity Booster Control Unit 9353217

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6836768

BMW F20 F31 LCI F32 Telematics Control Unit Module ATM ECE 4G WLAN 2622602

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959792D

Audi A5 8T Front Door Control Module Unit Left N/S 8T0959792D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0907468C

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468C

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 7E0971794D

Volkswagen Transporter T6 Cable Wiring Harness Positive Plus 7E0971794D

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8509914

BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 Cover Electronics Box 8509914

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8J0971030J

Audi TT 8J Door Wiring Harness Cable Passenger Side 8J0971030J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6974890-MYS

BMW E87 E90 E91 LCI PDC Ultrasonic Parking Sensor Mysticblau Blue - A07

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2055404306

Mercedes W205 Shock Absorber Adjustment Wire Harness Rear Right O/S A2055404306

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0971073

Audi A6 C6 Front Slam Panel Wiring Loom Harness Cable 4F0971073

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059060204-2

Mercedes W205 Front Headlight Wiring Harness Cable Plug Right O/S A2059060204

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7827899

BMW G20 G21 G60 G61 X2 U10 X1 U11 Charging Charge Cable Hybrid Plug In 7827899

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

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