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

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9266350

BMW F01 F02 HiFi System Amplifier Harman Becker Audio Booster 9266350

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0971228C

Audi Q5 8R Engine Starter Wiring Harness Loom Wire 2.0 TDI Diesel 8R0971228C

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6836504

BMW F20 F21 LCI F30 F31 F32 F13 Electric Coolant Fan Motor Relay 130A 6836504

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0035223AP

Audi A4 S4 B8 Audio Amplifier Sound Booster Control Unit Module 8T0035223AP

€113.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 3417160

BMW X3 E83 LCI Cable Alternator Starter Base B 3417160

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049007508

Mercedes W204 Display Screen Monitor Radio Sat Nav Navigation Unit A2049007508

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8512292-2

BMW E90 E91 LCI N47N 316d 116HP Engine ECU Kit DDE 8510832 + CAS3 + Key Manual

€146.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9264924

BMW F01 F02 F10 F11 F13 Power Distribution Fuse Box Rear 9264924

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469004519

Gearbox Module Mercedes W176 W246 Control Unit ECU Automatic A2469004519

€56.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8W0959655F

Audi A4 B9 Air Module Crash Control Module Unit ECU 8W0959655F

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0919275-DGR

Audi TT 8J PDC Parking Distance Sensor Control Daytona Grey Pearl Z7S 4H0919275

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9264917

BMW Z4 E89 Roadster Air Module Control Unit ECU 9264917

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8678976

Engine Wiring Mini F56 BMW F40 Petrol B38C Valvetronic Servo Motor Harness

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P0959354

Porsche Cayenne 92A Front Side Door Crash Sensor Left Right N/O/S 7P0959354

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2048709426

Mercedes W204 Air Module Control Unit SRS Sensor ECU A2048709426

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8507899

BMW F31 N47N 320d Engine Wiring Harness Module Diesel 8507899 8507896

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. DT1T14B321AG

Ford Transit Connect Mk2 II Air Module Control Unit ECU DT1T14B321AG

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0986021230

BMW 3 Series E90 E91 E92 E93 Engine Starter Motor 0 986 021 230

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469066600

Fuse Box Mercedes W156 W176 W246 Front Relay Control Unit Module A2469066600

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3412244

BMW X3 E83 Wiring Harness Engine Loom Wire Gearbox Module 3412244

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2465403805

Mercedes W176 W245 Front Left N/S Door Wiring Loom Harness A2465403805

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. FK72-5162-A

Land Rover Discovery L550 Cover Fuse Box Battery Trim Panel FK72-5162-A

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7243564

BMW F20 F30 Front Sport Seat Backrest Heating Mat Element 7243564

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1729017601

Mercedes SLK R172 Front Air Module SRS Control Unit ECU A1729017601

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9247130

BMW F11 Touring Antenna Aerial Diversity Amplifier Unit 868 MHZ 9247130

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9227217

BMW F12 Aerial Amplifier AMP Antenna Supression Filter Module 9227217

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M0907247A

Keyless Entry Amplifier Audi A4 B9 A5 F5 Control Box Module Antenna 4M0907247A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971230HH

Audi S3 8V Starter Alternator Wiring Harness 5Q0971230HH

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0025421119-1

Relay Unit Mercedes W163 W168 W203 W211 4-Pin Black Hella A0025421119 Set 2x

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9138969

BMW E60 LCI E61 LCI Electronic Driver Circuit Centre Console 9138969

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8A0937530

Audi A6 C6 Fuse Relay Box Module Unit Holder Bracket 8A0937530

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6519064300

Mercedes W205 Diesel OM651 Engine Starter Motor Actuator Bosch A6519064300

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7524715

BMW Z4 E85 Roadster Starter Earth Ground Wire Cable 2.0 Petrol 7524715

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H22-14301-EA

Land Rover Discovery 3 L319 Negative Battery Cable Wiring Loom 4H22-14301-EA

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8506373

BMW X3 Series E83 LCI 1.8d N47 Engine Control Unit ECU Module DDE 8506373 Manual

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2135406303

Mercedes W213 PDC Parking Sensor Wiring Loom Cable Rear Bumper A2135406303

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7928461

BMW G11 G12 G29 G31 G38 Radio Remote Control Receiver Module Unit 7928461

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009053816

Mercedes C118 W117 Battery Cable Negative Terminal Wiring A0009053816

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2479007708

Rain Sensor Mercedes C118 W177 W247 Front Windscreen Light Unit A2479007708

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6549061400

Starter Motor Mercedes W213 S213 W238 OM654 Diesel Engine Actuator A6549061400

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2205404208

Mercedes W220 Rear PDC Parking Sensor Wiring Loom A2205404208

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1431172-2

Ford Transit Mk7 Engine Cooling Fan Radiator Module Control Unit 940002904

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1644400937

Mercedes ML W164 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1644400937

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9237082

BMW F10 F11 Cable Harness Door Driver's Side Right O/S Wiring 9237082

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8576341-10

BMW F20 F21 F30 F31 118d 318d 143HP N47N Engine ECU Kit DDE 8576341 Manual

€123.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9464652

Mini Cooper One F57 Convertible Folding Top Control Unit Module CVM 7457434

€156.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0025467940

Receptacle Housing Mercedes W164 W203 W639 Dashboard Wiring Harness A0025467940

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8067512

BMW F10 F11 F30 F31 Alarm System Unit Security Basis Module 8067512

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9069000501

Mercedes W906 Door Module Front Left Right N/O/S Control Unit ECU A9069000501

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A0025428819

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2139002501

Mercedes W213 OM654.920 Automatic Transmission Control Unit Module A2139002501

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0959793B

Audi Q7 4L Front Door Module Driver Right O/S Side Control Unit 4L0959793B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6857208

Parking Distance Assistant BMW 20 F21 F30 F31 F36 Control Unit Module 6857208

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1165905-1

BMW X5 Z3 Series 1 E36 E53 DSC Hydraulic Pump Compressor 1165905 1165904

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8510221-1

BMW E90 E91 LCI E92 325d Diesel N57 204HP ECU Engine Kit DDE 8510221 CAS3 + Key

€132.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229001414

Module Mercedes C205 Front Door Left N/S Control Module Unit A2229001414

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8373700

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A4479000601

Mercedes Vito W447 Rain Light Sensor Control Unit Module A4479000601

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009060226

Starter Mercedes Vito W447 Diesel OM622 Starter Motor A0009060226

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9226325

BMW 1 E82 ECU Body Control Module L1 PL2RR JBBFE IIIR Junction Box 9226325

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8483814

BMW G20 Starter Wiring Battery Alternator Cable Harness Loom 8483814

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6882780

BMW X5 F15 X6 F16 Power Steering Column Control Unit Module 6882780

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 7823310

BMW 3 Series F30 F31 330d 330dX N57N Diesel Alternator Starter Cable B+ 7823310

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5QS907338B

Audi A3 S3 8Y Headlight Head Light Lamp Range Control Unit Module ECU 5QS907338B

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2229000013

Door Module Mercedes W205 X253 Front Door Right O/S Control Unit A2229000013

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. RVH000095

Land Rover Discovery 3 L319 Relief Suspension Valve Block Control RVH000095

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6986987

BMW Z4 Series E85 Cable Loom Passenger's Door Wiring Harness 6986987 6986982

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9157158

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9157158

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8H0959985B

Audi Q7 4L Keyless Module ECU Door Lock Control Unit 8H0959985B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K9035225

Audi RS4 B8 Radio Aerial Antenna Amplifier AM/FM 8K9035225

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1775401731

Mercedes W177 M282 Wiring Harness Battery Starter Motor Alternator A1775401731

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009006007

Fuel Pump Module Mercedes W205 Control Unit ECU A0009006007

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059006537

Mercedes C205 Coupe Air Bag Control Module ECU A2059006537

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0919294E

Volkswagen Golf Mk7 PDC Parking Distance Control Module Unit ECU 5Q0919294E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7649390

BMW F45 i8 Mini F60 B38 B38X Hybrid Engine Alternator Generator 7649390

€336.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T2035652F

Audi A5 8T A4 B8 Sat Navi Stereo Radio Audio MMI Head Unit CD Player 8T2035652F

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971693B

Audi A4 B8 Rear Door Card Harness Wiring Cable Loom Left Right N/O/S 8K0971693B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8799259

Mini F56 Active Sound Design Radio Audio Amplifer Control Unit Module 8799259

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009053006

Battery Wire Mercedes W205 Negative Cable With Battery Sensor 48V A0009053006

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0907530M

Audi A3 8V Gateway Module Control ECU Unit 5Q0907530M

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7520429

BMW 1 3 Series E87 E90 E91 Petrol N45 N46 118i 320i Flywheel Automatic 7520429

€30.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9163173

BMW E60 E61 LCi Right Left Rear Door Wiring Loom N/O/S 9120797

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959795G

Audi Q5 8R Rear Door Control Module Unit ECU Left Right N/O/S 8K0959795G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8518424-1

BMW F20 F30 118d 318d N47N 143HP Engine Control Unit ECU DDE 8518424 Manual

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009006102

Mercedes Vito W639 ECU Control Unit Crash Impact Module Air Module A0009006102

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0025426918

Mercedes W211 W220 Crash Sensor Left Right N/O/S A0025426918

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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

Ford Fiesta Transit Relay 4-Pin Grey FoMoCo Unit 6G9T-14B192-EA SET X2

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 95B919606E

Porsche Macan 95B MMI Multimedia Navigation Control Head Unit 95B919606E

€332.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009822923

Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Grey A0009822923

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2205400031

Mercedes A B S Class W169 W220 W245 Battery Lead Cable Negative A2205400031

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959792D

AUDI S5 8T Door Control Module ECU Front Left N/S 8K0959792D

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7625998

BMW F20 F21 F22 F30 F31 F32 F33 Line Cable Power Distribution Module 7625998

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9874189

BMW 1 3 Series F20 F30 MINI F56 Control Unit Air Conditioning Module 9284440

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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