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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BMW F01 F02 Headlight Module LEAR TMS Headlamp Control Unit Module 7304589

€66.95

Free delivery: Nov 12 – 13

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Part no. A1698704989

Mercedes W169 W245 GPS Navigation Radio Multimedia Player Head Unit A1698704989

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L971627AD

Volkswagen Golf MK7 GTI Fuel Injectors Wiring Harness 2.0 TFSI 06L971627AD

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971035AJ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971035AJ

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6920292

BMW 7 Series E65 Cable Harness Loom Front Door Wiring Left Right N/O/S 6920292

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059004521

Door Module Mercedes W205 GLC C253 Rear Left N/S Control Unit ECU A2059004521

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DS7T-14B321-CE

Ford Mondeo Mk5 Air Module Unit Control ECU Sensor DS7T-14B321-CE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5J6971161BC

Skoda Fabia MK2 5J Rear Door Wiring Loom Harness Rear Right O/S 5J6161BA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0024463140-4

Mercedes W169 A160 CDI 95HP M266.920 Engine ECU Kit A0024463140 Automatic

€222.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. M8A2-14516-DB

Range Rover Velar L560 Positive Battery Cable M8A2-14516-DB

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7640132-2

Alternator BMW F20 LCI F30 Mini F56 F60 Alternator Generator DENSO 180A 7640132

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6993311

Seat Module BMW F20 F32 F33 Control Unit Front Left Right N/O/S 6993311

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7E0971691

Volkswagen Transporter T5 Sliding Door Wiring Loom Cable 7E0971691

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2115453632

Mercedes S211 W211 C219 Body Control Module ECU Passenger Side A2115453632

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8473189-1

BMW X5 F15 30dX N57N 258HP Engine Control Unit ECU Kit 8473189 Automatic

€436.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055403706

Mercedes W205 Front Axle Damper Adjustment Left N/S Wiring Harness A2055403706

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8510841-1

BMW X5 E70 LCI 40dX N57S 306HP Engine Control Unit ECU KIT DDE 8510841 Automatic

€560.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E5945094A-1

Audi A4 B7 Tail Light Side Panel Lamp Cable Wiring Rear Right O/S 8E5945094A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8D0951253A

Audi A6 C6 Multi Use Relay Unit Module 4 Pins 373 8D0951253A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8512291-2

BMW 3 Series E90 E91 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key 8512291 Manual

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775402811

Mercedes W177 W243 W247 Rear Door Wiring Harness Cable Left N/S A1775402811

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7PP907279CG

Porsche Macan 95B Body Control Unit Module BCM 7PP907279CG

€232.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971030AJ

Audi Rs Q3 8U Front Door Wiring Loom Cable Passenger Side 8U0971030AJ

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02T911023S

Starter Motor Seat Ibiza 6J VW Volkswagen Polo 6R 1.2 Petrol Engine 02T911023S

€23.95

Free delivery: Nov 12 – 13

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Part no. 03P903023B

Seat Ibiza 6J Mk4 CFWA Diesel Engine Alternator Generator 14V 140A 03P903023B

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2541994

Ford Kuga C482 Battery Negative Cable 2.5 FHEV Petrol Hybrid LX6T-14301-EAAH

€23.95

Free delivery: Nov 12 – 13

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Part no. TT-8J-RADIO

Unbranded Audi TT 8J Radio Satelite Navigation Head Unit CD DVD Player

€113.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 03L906018DT-2

Audi TT 8J 2.0 TDI Quattro 170HP CFGB Engine ECU Kit BCM Key 03L906018DT Manual

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8385159-1

BMW X3 E83 E46 Battery Cable Holder Mounting B Base Trim Carrier 8385159

€23.95

Free delivery: Nov 12 – 13

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Part no. 6944536

BMW E61 Touring Positive Battery Cable Plus Pole Lead 6944536

€113.95

Free delivery: Nov 12 – 13

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Part no. 9342881-1

BMW F20 F21 F30 F31 Telematics Control Unit Module TCU SOS 9342881

€28.95

Free delivery: Nov 12 – 13

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Part no. 9008087019

Toyota Avensis T270 Relay Bosch 4 Pin Body Control Module Unit 9008087019

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0959792P

Audi A5 8T Front Door Control Module Right O/S Passenger Side 8T0959792Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BH22-14633-CA

Land Rover Discovery 4 L319 Door Wire Wiring Harness Rear Left N/S BH22-14633-CA

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8586571-1

BMW F20 F30 LCI B47 Engine Gearbox Module Wiring Cable Loom Harness 8586571

€75.95

Free delivery: Nov 12 – 13

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Part no. A1729000608

Mercedes W212 W176 W246 W242 Media Interface Control Module Unit A1729000608

€23.95

Free delivery: Nov 12 – 13

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Part no. 6873289

BMW X3 F25 X4 F26 Blind Spot Lane Change Module Radar Sensor Left N/S 6873289

€51.95

Free delivery: Nov 12 – 13

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Part no. GX53-18K812-CJ

Land Rover Discovery Sport L550 Radio CD Player Multimedia Unit GX53-18K812-CJ

€56.95

Free delivery: Nov 12 – 13

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Part no. 8X23-14684-AB

Jaguar XF X250 Front Air Module Crash Sensor Module Unit Control 8X23-14684-AB

€23.95

Free delivery: Nov 12 – 13

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Part no. 982907309C-1

Porsche 718 Cayman S 982c 2.5 DDN 349HP Engine Control ECU Automatic 982907309C

€484.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971029DQ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971029DQ

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0971230FP

Battery Cable Audi A3 8V Starter Alternator Wiring Harness 5Q0971230FP

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7152588

Mini Cooper One R50 R53 JCW Fuel Filler Cover Flap Actuator 7152588 7127872

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0959794F

Volkswagen Sharan 7N Rear Door Control Module Left Right N/O/S ECU 7N0959794F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3V0971694AA

Skoda Superb 3V Door Wire Cable Harness Loom Rear Right O/S 3V0971694AA

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QF971345

Audi RSQ3 F3 Positive Plus + Battery Wiring Harness Cable Power 5QF971345

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2139002722

Door Module Mercedes W205 W213 X253 Rear Left Door Control Unit A2139002722

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A0FAE3

BMW G26 Earth Ground Cable Negative Battery Lead Wiring 5A0FAE3

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. A2479009107

Rain Sensor Mercedes W118 W177 W247 Windscreen Light Control Unit A2479009107

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971104AD

VW Volkswagen Golf Mk7 Wiring Loom PDC Rear Harness Parking Sensor 5G0971104AD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3R0971693A

Seat Exeo 3R Rear Door Wiring Harness Cable Loom Left Right N/O/S 3R0971693A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1698208026

Mercedes W169 Door Control Module Right Front O/S A1698208026

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BV6T-14E073-AAB

Ford Kuga Mk2 Front Door Wiring Harness Cable Loom Left N/S BV6T-14E073-AAB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GK2T-10300-BC

Ford Transit Mk8 Alternator Generator Unit 220A 2.0 Diesel Engine 6CIT-10300-BC

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. H1B1-12A650-FA

Ford Fiesta Mk8 Engine Control Module ECU Unit 1.0 Petrol 2714615 100HP SFJE

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1718705494

Mercedes R171 Radio Player CD COMAND Head Unit Controller A1718705494

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0025428719

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella A0025428719

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8C1T-14A073-BE

Ford Transit Mk7 Body Control Module BCM 2.2 TDCi 8C1T-14A073-BE

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. F1ET-14K138-CDE

Ford Focus Mk3 Front Wiring Cable Harness Door Passenger Side F1ET-14K138-CDE

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06M911021

Audi S4 B9 S5 F5 Starter Motor Engine Actuator Bosch TFSI Petrol 06M911021

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 420971036

Audi R8 42 Front Door Wiring Harness Cable Loom Right O/S 420971036

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7508203-1

Range Rover L322 Battery Cable Positive Plus Pole Distribution Wiring 7508203

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. KD-R331-1

JVC KD-R331 Car Radio Stereo CD MP3 AUX Bluetooth Audio Player Head Unit

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1697220180-1

Mercedes W169 Door Plug Cover Trim Insert Blank Seal SET X2 1697220180

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8978012160

Toyota Corolla E12 Immobiliser Control Module ECU Manual 8978012160

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8506444-1

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

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-19C032-AE

Land Rover Discovery 4 L319 Radio Receiver DAB Module AH42-19C032-AE

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P4971035A-1

Audi A3 8P Door Wiring Harness Loom Electrical Cable Driver Side O/S 8P4971035A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HPLA-14D619-BF

Jaguar XF X260 Rear Left N/S Door Control Module ECU Unit HPLA-14D619-BF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L1937503

Audi Q7 4L Fuse Relay Box Module Electrical Control Unit 4L1937503

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3R83-11000-AB

Jaguar Xf X250 Engine Starter Motor 12V AJ6WG 3.0 Petrol 3R83-11000-AB

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-19G255-AA

Land Rover Range Rover L322 Aerial Antenna Amplifier Module AH42-19G255-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6519009702-5

Mercedes GLA X156 220d 651.930 170HP Engine ECU Kit Ignition + Key A6519009702

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8Y0945307A-1

Audi A3 8Y Rear Taillight Lamp Wiring Harness Loom Cable Left N/S 8Y0945308A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K5971693BA

Audi A6 C8 Door Wiring Harness Cable Loom Rear Left Right N/O/S 4K5971693BA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971036K

Audi A7 4G8 Front Door Harness Wiring Loom Cable Passenger Side 4G8971036K

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4155404305

Microphone Cable Mercedes Citan W415 Wiring Loom Cable Harness 27083202

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G2907311C-1

Audi A7 4G8 3.0 TDI CRTE 218HP Quattro Engine ECU Kit 4G2907311C BCM2 + 2 Keys

€664.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83F971104F

Audi Q3 F3 Rear Bumper PDC Wiring Loom Cabling Parking Sensor 83F971104F

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2383676

Battery Cable BMW F22 Negative Earth Cable Minus Electrical Wire 7625999

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. H1BT-19949-AD

Ford Fiesta ST MK8 Heater Flap Control Wiring Cable WIre Loom H1BT-19949-AD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. C1BT-14D559-AAC

Ford Fiesta Mk7 Boot Lid Tailgate Keyless Entry Wiring Loom C1BT-14D559-AAC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9380203

BMW G30 G31 G32 G11 G12 Cable Wiring Harness Holder Guide Mount 9380203

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7836126

BMW 5 6 E60 E61N M5 E63 E64 M6 Outlet Camshaft Exhaust Cylinders 6-10 126/A2

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775405101

Door Wiring Mercedes V177 Rear Door Right Left N/O/S Harness Wire A1775405101

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DK62-14A578-DD

Range Rover L405 Rear Seat Wiring Loom Harness Cable Right O/S DK62-14A578-DD

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9228495

BMW F07 GT ECU Body Control Module Junction Box V12 PL2 JBBFE III 9228495

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A4FF06

BMW U06 X1 U11 Antenna Amplifier Diversity Aerial Module Control Unit 5A4FF06

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LR076282

Land Rover Discovery Sport L550 Front Bumper PDC Wiring Loom FK72-14369-GC

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. EM5T-14D212-ED

Ford Ranger Mk6 Bluetooth Multimedia Control Module Unit ECU EM5T-14D212-ED

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1669009311

SAM Module Mercedes ML W166 Center Electrics Control Modul A1669009311

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9805461

Mini Countryman R60 Front Door Wiring Loom Harness Cable Right O/S 9805461

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. B67875835

Mercedes W203 C219 Nokia 6100 6610 6610I 7250I Mobile Phone Charger AB67875835

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8621490

Alternator Cable BMW F21 F22 F30 LCI 125i 220i 228i 320i N20 Starter 8621490

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BK2T-14401-FHE

Ford Transit Connect Fuse Relay Box Panel 1.5 EcoBlue Diesel BK2T-14401-FHE

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

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