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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Fuse Box Mercedes ML W164 W251 OM642 Diesel Relay Module Unit A1645450201

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GK2V-14301-FB

Ford Transit Mk8 Negative Battery Cable Wire Terminal GK2V-14301-FB

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2049060405

Mercedes W204 Front Fuse Board Box Relay Unit Case A2049060405

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HB3T-14K039-EB

Ford Ranger Wildtrak Automatic Gearbox Wiring Loom Harness HB3T-14K039-EB

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1725402209

Mercedes R172 Glove Box Wiring Loom A1725402209

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079903805E

Audi A4 B8 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025421119

Mercedes W163 W168 W203 W211 Relay 4-Pin Black Hella A0025421119

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05C907394D

Seat Arona Fr Kj7 Engine ECU 110HP 1.0 TFSI Manual Gearbox Petrol 05C907394D

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1Q0971120P

Volkswagen Eos Front Door Wiring Loom Harness Cable Passenger Side 1Q0971120P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009051816

Mercedes C118 W167 W177 W206 C247 Front Windscreen Camera Assist A0009051816

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9165624

BMW E93 Air Module Control Unit Module ECU 9165624

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DPLA-7H417-BA

Range Rover L405 L494 Transfer Case Control Unit Module ECU Bosh DPLA-7H417-BA

€66.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 7579136

BMW Mini Cooper S R56 Automatic Gearbox ECU Control Unit EGS Module 7579136

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8682893

BMW F20 F30 LCI 120i 320i 330i B48 Engine Wiring Cable Loom Harness 8644504

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6928350

BMW E87 LCI Roof Headliner Interior Lighting Wiring Loom Harness 6928350

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7822015

BMW G20 G21 G26 330d 430d B57P Diesel Starter Cable Wiring B+ 7822015

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DH22-14B192-CA-1

Range Rover Evoque L538 Relay 5-Pin Unit 12V 40A Grey DH22-14B192-CA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4869809-3

BMW E82 E88 Rear Lamp Taillight Tail Light Left N/S Harness Wire Loom 7285641

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4535400050

Smart Fortwo W453 Fuse Module Relay Box Module A4535400050

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0867749A

Audi A6 C6 Battery Hold Down Strap Support Securing Holder Belt 4F0867749A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7579155-1

Starter Motor BMW X5 E70 LCI X6 E71 Z4 E89 N20 N55 Petrol Engine 7579155

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5WA962133F

Audi Volkswagen Seat Keyless Entry Module Aerial Antenna 5WA962133F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2128202289

Mercedes W212 Aerial Antenna Module Amplifier Rear Window Top Left A2128202289

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025428919

Relay Mercedes W176 W246 5-Pin Yellow Hella 12V A0025428919

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1695450003

Mercedes W169 Fuse Box Cover Trim Panel A1695450003

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059903019L

Porsche Macan 95B 3.0 TDI CTBA Engine Alternator Generator 14V 180A 059903019L

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8P0035192SX

Audi A3 S3 8P Radio Media GPS Sat Audi Navigation Plus Unit 8P0035192QX

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059006013

Door Module Mercedes W205 Front Right O/S Door Control Module Unit A2059006013

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1725402513

Mercedes SLK R172 Rear Window Heating Cable Loom Heat Wiring Harness A1725402513

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. EJ32-14308-BC

Range Rover Evoque L538 Start Stop Power Supply Cables EJ32-14308-BC

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1685453532-2

Mercedes W168 A140 ESP + HBA Electronic Stability Control Module A1685453532

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2649000700-3

Mercedes W205 C300 OM264.920 Engine Control Module ECU A2649000700 Automatic

€208.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469000012-4

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AV4T-14D202-BA

Ford Kuga Mk1 Bluetooth Module Wiring Harness Cable AV4T-14D202-BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3448379

Mini R55 R56 R57 R58 R60 R61 Control Unit PDC Parking Sensor Module 3448379

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6G9T-14B192-CA

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. NNN500560

Land Rover Discovery 3 L319 Engine ECU 276DT 190HP NNN500560 Automatic

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6884612

Mini Cooper F55 F56 F57 Parking Assistant Control Module 6884612

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6S61-12A650-XB

Ford Fiesta Mk6 ST150 N4JB 150HP Engine ECU Kit 6S61-12A650-XB BCM + 2 Keys

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1779004215

Mercedes C118 W177 Radio Stereo Satellite Navigation Head Unit A1779004215

€336.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7420992-1

BMW F22 F23 F87 M2 LED Tail Light Lamp Rear Right O/S Wire Cable Harness 7420992

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6G9N-17D547-AD

Ford Galaxy Mk2 Windscreen Front Window Rain Sensor Bosch 6G9N-17D547-AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2218207510

Mercedes W221 Anti Theft Roof Alarm Ultrasonic Motion Sensor Unit A2218207510

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0907472

Audi A4 B8 Headlight Headlamp LED Module Control Unit 8K0907472

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7M5T-14A073-DB

Ford Focus Mk2 Body Control Module BCM Fuse Box Unit 7M5T-14A073-DB

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971035BA

Audi A4 S4 RS4 8W A4 B9 Door Wire Harness Front Passenger Side 8W0971035BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6M21-14B684-AA

Ford Mondeo Mk4 Front Seat Wiring Loom Harness Left Right N/O/S 6M21-14B684-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7811702-3

BMW E81 E82 E87 LCI E88 N47S 123d ECU Kit DDE 7811702 + CAS3 + Key Automatic

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1665402709

Mercedes W166 Automatic Gearbox Wiring Loom Harness Cable A1665402709

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9267516

BMW F10 Central Gateway Module Control Unit Lear ZGW-02 MID Plus 9267516

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009052200

Windscreen Camera Mercedes W209 W212 W221 Front Control Unit Module A0009052200

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059911021C

Audi A4 B8 3.0 TDI CAPA Diesel Starter Motor 059911021C

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 8594489

BMW X1 F48 Mini F55 F56 F57 Battery Cable Starter-Base B+ 8594489

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8S0907468D

Audi TT FV Mk3 8S Gateway Module Interface Data Bus Control Unit 8S0907468D

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1729060205-1

Mercedes SLK R172 Rear SAM Fuse Relay Box Control Unit Module A1729060205

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9324779

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM LR-01 9324779

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5K0959434B

Audi A1 8X Q3 8U Keyless Access Module Control Unit 5K0959434B

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9159310

BMW F10 Central Sensor LOW 9159310

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2118704126

Mercedes W221 Door Control Module Right Rear O/S A2118704126

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9157156

Body Gateway Module BMW E60 E61 LCI E63 E64 ECU Control Unit 9157156

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7634063

Gearbox Wiring BMW F10 F11 520i 528i N20 Automatic Engine Loom Harness 7634063

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4539063900

Smart C453 Alternator Generator 90A A4539063900 281920

€123.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G4971693T

Volkswagen VW Golf Mk7 Rear Door Wiring Harness Cable Loom Left N/S 5G4971693T

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR028097

Range Rover Evoque L538 Tailgate Trunk Wiring Harness Cable BJ32-10E998-AA

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8582279-8

BMW F30 F32 F34 GT 320d 420d N47N 184HP Engine Module Unit ECU DDE 8582279

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059005713

Door Module Mercedes W205 Front Left N/S Door Control Module Unit A2059005713

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2749062100

Starter Motor Mercedes W213 C238 C253 Engine A2749062100

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469008819

Radio Head Unit Mercedes W176 W246 Audio 20 Media Player Navigation A2469008819

€265.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059000828

Door Module Mercedes GLC X253 Rear Door Left Control Module A2059000828

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0971230HF

Volkswagen Passat B8 Alternator Wiring Loom Harness 2.0 TDI Diesel 5Q0971230HS

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6401540502-1

Mercedes W169 W245 A B 160 180 200 CDI OM640 Alternator Generator A6401540502

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L903023K

Audi A3 8V A4 A5 B8 Alternator Generator Electrical Unit Diesel 03L903023K

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0937086AJ

Skoda Octavia 5E VW Golf AU Body Control Comfort Unit Module BCM 5Q0937086AJ

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055406621

Starter Cable Mercedes W205 GLC X253 Electrical Wiring Harness A2055406621

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-14F641-AK

Range Rover Vogue L405 Evoque L538 TV Tuner Control Unit Module CK52-14F641-AK

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8592700

Glow Plug Wiring BMW F48 Mini F57 Wiring Harness Engine Module 8592700

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2465409934

Mercedes W176 W246 Rear Door Wiring Loom Harness Left Right N/O/S A2465409934

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7520912

BMW E60 E61 E63 E64 LCI Cover Electronic Box 7520912

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. J8A2-17509-AA

Range Rover Velar L560 Radio Supression Module Passive FIltering J8A2-17509-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2K5907561C

Volkswagen Caddy Maxi 2k Front Distance Radar Sensor 2.0 TDI Diesel 2K5907561C

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K5945095AC-1

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S 8K5945095AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E971627H

Audi A5 8T Injector Wiring Harness Cable Cylinders 1-3 3.2 FSI 07L971627F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4E0941817

Audi A6 A8 Q7 CAN Bus Jumper Contact Bridge Connector 4E0941817

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7PP907064JF

Porsche Cayenne S 92A Macan 95B Body Control Module Unit ECU 7PP907064JF

€151.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A67892

BMW X1 U11 Door Wiring Loom Harness Passenger Side N/S 193444-11

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7115655-LMB

BMW X3 E60 E61 E83 Front PDC Parking Distance Sensor Le Mans Blau - 381

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. M8A2-14633-DB

Land Rover Range Rover Velar L560 Door Card Wiring Rear Left N/S M8A2-14633-DB

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9261606

BMW 1 2 F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Mineralweiss White A96

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8630125-4

BMW F20 F21 F30 116i 316i N13 136HP Engine Control ECU Kit DME 8630125 Automatic

€503.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0005408250

Fuse Box Mercedes W205 W213 C238 C253 Control Unit Module A0005408250

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. F1ET-14F239-AA

Ford Focus Mk3 Multifunction Screen Radio Multimedia Display F1ET-14F239-AA

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0907357C

Audi TT 8J Headlight Head Light Lamp Range Control Unit Module ECU 8X0907357C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8E0035411B

Audi A4 B7 Door Speaker Tweeter Front Left Right N/O/S 8E0035411B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1698206726

Mercedes-Benz W245 ECU Control Unit Sensor Module Airbag A1698206726

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6850846

BMW F10 F11 F12 Parking Brake Unit Electric Control Module EMF 6850846

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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