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 F54 F55 F57 B48 136HP Engine Control ECU Kit DME 8674258 Automatic

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8379938

BMW 3 Series E46 Ultra Sonic-Module 8379938

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025422519

Mercedes W168 W169 W245 Blue Relay 4-Pin Tyco A0025422519

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9118108

BMW 1 Series E81 E82 Wiring Set Door Co-driver 9118109

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8P4971693P

Audi A3 8P Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8P4971693P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9131734

BMW E81 E82 E88 E92 Passenger Seat Wiring Memory Loom Harness Cable 9131732

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KK2T-9K499-CKC

Ford Transit Custom Exhaust Emission Control Wiring Harness KK2T-9K499-CKC

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G8959793A

AUDI A7 4G8 Door Control Module Front Left N/S Driver Side 4G8959793A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2127341

Ford Mustang Mk6 Cable Harness Wire FR3T-13A840-CB

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CM5T-14B006-AA

Ford Focus Mk3 Air Module Crash Impact Sensor CM5T-14B006-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0907182G

Audi A8 D4 4H Multicontour Seat Module Control Unit Left Right N/O/S 4H0907182G

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. C1BT-14A584-BDF

Ford Fiesta Mk7 Front Door Wiring Harness Cable Driver's Side C1BT-14A584-BDF

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BV6T-14E073-AAD

Ford Focus Mk3 Front Door Wiring Loom Harness Left N/S BV6T-14E073-AAD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A207E7

BMW X3 G01 G20 G21 G30 G31 Audio Speaker Sound Amplifier Harman 5A207E7

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1702601

Ford Mondeo Mk4 Rear Bumper Parking Sensor Wiring Harness 6G9T-15K868-AJ

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8654466-1

BMW F45 225i 231HP B48 Engine ECU Kit Unit DME 8654466 BDC Key Automatic

€664.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4S41-12A650-BB

Ford Transit Connect 1.8 TDCI Engine Control Module ECU 4S41-12A650-BB Manual

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K0919605A

Audi A6 C8 A7 S7 RS7 Display Screen Multimedia Navigation 4K0919605A

€294.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7410838-1

BMW X3 F25 Front Headlight Lamp Light Wiring Harness Cable Right O/S 7410838

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-19H440-BF

Land Rover Discovery Sport L550 Keyless Module Control Unit FK72-19H440-BF

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5E3945208A-2

Skoda Octavia Mk4 NX Tail Light Side Panel Lamp Wiring Rear Right O/S 5E3945208A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2135400200

Mercedes W205 W213 W238 Fuse Box Cover Control Unit Holder Bracket A2135400200

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DV61-12A650-BKE

Ford Transit Connect 1.6 Duratorq 95HP Engine Module ECU DV61-12A650-BKE Manual

€322.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W5945069A-1

Audi A4 B9 Rear Tail Light Lamp Outer Wire Connector Plug Left N/S 8W5945069A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6980177

BMW X1 X3 X5 X6 Z4 Z8 Relay Changeover Function Green 6980177

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8573260-4

ECU Kit BMW F20 F21 116d ed Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8H1971035CT

Audi A4 S4 RS4 8H Cabriolet Door Wiring Loom Harness Passenger Side 8H1971035CT

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 83A035842

Audi A1 GB Multimedia Sat Nav Radio Head Unit Controller 83A035842

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0915336B

Audi A3 8P Volkswagen Golf Mk5 Battery Side Cover Surround Housing 1K0915336B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9387145

BMW F30 LCI 330e B48X Negative Earth Cable Battery 9387145

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6934011

BMW 7 Series E65 E66 Cable Harness Loom Front Door Wiring Left N/S 6934010

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L0971235

Volkswagen Touareg 7L Negative Battery Terminal Cable Wiring Loom 7L0971235

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8506281

BMW E81 E87 E90 LCI 116d 316d 118d 318d N47 Engine ECU DDE 8506281 Manual

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. M8D2-14C361-AA

Land Rover Range Rover Evoque L551 Water Pump Harness Loom Wiring M8D2-14C361-AA

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. JPLA-14C239-BB

Range Rover Evoque L551 Climate Control Unit Module ECU JPLA-14C239-BB

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1635450716

Mercedes W163 FBS Switch Keyless Entry Module Control Unit ECU A1635450716

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9251722

BMW F20 Front Left Door N/S Wiring Loom Harness Cables 9251715

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025428719-1

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella SET X2 A0025428719

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-19C164-BF

Land Rover Range Rover Evoque L538 Audio Amplifier Module Control BJ32-19C164-BF

€493.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BV6T-17D547-AD

Ford Transit Mk8 Front Window Windscreen Rain Light Sensor BV6T-17D547-AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. ES73-13W030-HD-2

Ford Mondeo Mk5 Front Headlight Headlamp Left N/S Harness Loom ES73-13W030-HD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1779069601

Mercedes W177 W247 Fuse Box Front Relay Engine Control Unit Module A1779069601

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0907159D

Audi RS4 B9 A5 F5 Impact Sound Module Control Unit 8W0907159D

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6949226-2

4 x BMW E63 E64 DWA Door Alarm System Module Control Unit Set 6949226

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2216890614

Mercedes W221 PDC Distance Control Holder Bracket A2216890614

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018GF

VW Scirocco Mk3 2.0 TDI 140HP CFHC Engine Control ECU Kit 03L906018GF Manual

€227.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0937555

Audi A8L 4H Fuse Box Relay Chamber Lower Cover Lid Housing 4H0937555

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CV1T-14B533-AE

Ford B-Max Mk1 Front Door Module Control Unit Passenger Side CV1T-14B533-AE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9301309

Air Conditioning Unit BMW F20 F21 F30 F31 Control Unit A/C Module 9301309

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8Y4971104BK

Audi S3 8Y Rear Bumper Wiring Harness Cable Loom 8Y4971104BK

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A2D558

BMW X3 G01 G20 G21 G30 G31 Audio Receiver DAB ECE Control Module 5A2D553

€222.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CPLA-14Q073-AA-1

Range Rover L405 Fuse Box Control Module CPLA-14Q073-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A28AF0

BMW F36 Gran Coupe Radio Player Head Unit CD DVD 5A28AF0

€840.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05L907309B-2

Audi Q3 F3 40 TDI DTUA Quattro 200HP Engine Control ECU Kit 05L907309B Automatic

€208.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3V0971694Q

Skoda Superb Mk3 3V Rear Door Wiring Harness Cable Right O/S 3V0971694Q

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR021461

Land Rover Range Rover L322 3.6 V8 368DT Diesel Starter Motor 7H42-11001-AB

€146.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0035342B-1

VW Volkswagen Touran Golf Polo Interface Module Multimedia Control 5N0035342B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6819334

BMW F20 F21 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 6819334

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V4971035J

Audi S3 8V Door Trim Wiring Wire Harness Cable Front Driver's Side 8V4971035J

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9342080

BMW Mini Cooper F55 F56 F57 F60 Telematics Control Unit Module 2622390

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6519007500-4

Mercedes W204 C250 CDI BlueEFFICIENCY OM651.911 Engine ECU A6519007500 Automatic

€108.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0907115BC-1

Audi TT 8J Engine Control Unit Module ECU 1.8 TFSI CDAA 160HP 8J0907115BC Manual

€279.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7127282

BMW X5 Series E70 Rear Trunk Battery Cover Tray Storage Box 7127282 51477127282

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2038700426

Door Module Mercedes CL203 Front Right O/S Control Unit A2038700426

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9343687

BMW F01 LCI F07 F10 F11 F25 Safety Control Unit Air Module Bag ECU 9343687

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6964142

BMW 7 Series E65 E66 E67 Control Unit Door Rear Driver-Side 6933266

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0005401203

Mercedes GLC 300e X253 Coupe Hybrid Electrical Battery Wire A0005401203

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 99757241902

Porsche Boxster Cayman 987 Underbody Cover Panel Trim 99757241902

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0971558K

VW Volkswagen Golf Gti 1k Door Wiring Loom Harness Front Right O/S 1K0971558K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2189058500

Mercedes CLS X218 Antenna Amplifier Rear Aerial Control Module A2189058500

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2078202810

Mercedes W207 Convertible Anti Theft Roof ITS TPS Sensor Module Unit A2078202810

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0937517-2

Audi A3 RS3 RS4 B7 8V Potential Power Distribution Junction Jump Point 1K0937517

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018RC-1

Audi Q3 8U 2.0 TDI CFGC Quattro Engine ECU Kit 03L906018RC Ignition + Key Manual

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KK3T-15604-FAE

Ford Transit Custom BCM Body Control Module Fuse Box ECU KK3T-15604-FAE

€165.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0907217D

Audi A4 B9 Front Windscreen Windshield Lane Assist Camera 8W0907217B

€227.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6949226-1

2 x BMW E63 E64 DWA Door Alarm System Module Control Unit Set 6949226

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2045408735

Mercedes W204 Front Seat Air Module Wiring Cable Front Right A2045408735

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8603352-5

BMW F20 F21 F30 N13 1.6 170HP Engine Control Module ECU DME Kit 8603352 Manual

€455.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6951674-AW

BMW E81 E87 E90 PDC Parking Sensor Ultrasonic Alpine White 3 - 300 6951674

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8U0971035AL

Audi Q3 8U Door Loom Wiring Harness Cable Front Right O/S 8U0971035AL

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9176078

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9176078

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. CPLA-14D620-AC

Range Rover L405 Rear Door Control Unit Module CPLA-14D620-AC

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7604347

BMW F20 F30 F31 F32 Bracket Holder Power Distribution Control Unit 7604347

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6269000000

Mercedes W205 C 200 d 626951 626.951 136HP Engine Unit ECU A6269000000 Automatic

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7565300

BMW Z4 E85 2.0i N46 150HP Engine Control Unit ECU DME Manual 7565300

€118.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1645451840

Mercedes W164 ECU Control Unit Bracket Holder A1645451840

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971035BB

Audi A5 8T Front Driver Side Door Wiring Harness Cable 8K0971035BB

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4709820700

Mercedes W470 Glow Plug Relay Module Unit A4709820700

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1308204070

Citroen Relay Peugeot Boxer Fuse Relay Electrical Box Housing Cover 1308204070

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018MQ

Audi Q5 8R CGLB 2.0 TDI 170HP Quattro Engine Control ECU 03L906018MQ Automatic

€146.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N2941005C-2

Volkswagen Tiguan 5N Headlight Wiring Cable Adapter Front Left N/S 5N2941005C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YTA101910

Land Rover Freelander L314 Positive Plus Pole Battery Cable Lead Loom YTA101910

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8573260-5

ECU Kit BMW F20 F21 116d Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

€308.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9134668

Seat Control Unit BMW E90 E91 E92 Seat Module Unit Controller ECU 9134668

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR080292

Range Rover Sport L494 Engine Starter Motor 3.0 Diesel FPLA-11001-BB

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9369124

BMW F10 F20 F30 Front Seat Control Unit Module Memory 9280913

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6915327

BMW E46 E39 E60 E81 E87 E90 E91 F10 F20 F30 Relay Make Contact Sky Blue 6915327

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0061514501-3

Mercedes W204 W212 Sprinter W906 Starter Motor OM651 Diesel Engine A0061514501

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

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