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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Mercedes A45 AMG W176 Door Wiring Loom Harness Wire Rear Left N/S A2465407811

€108.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0971035AR

Audi A5 S5 RS5 8T Door Card Wiring Loom Harness Wire Driver's Side 8T0971035AR

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2038000178

Mercedes-Benz C CLK Class W203 C209 Vacuum Solenoid Valve A2038000178

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K9945094-2

Audi A4 B8 Avant Tail Light Rear Right O/S Lamp Tailgate Harness Wire 8K9945094

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1661500333

Mercedes A-Class W168 Cable Starter Line Negative Line Battery A1661500333

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0185459132

Mercedes W140 ABS Control Unit ASR + PML Module ECU A0185459132

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0907651A

Audi RSQ3 F3 VW Tiguan AD Touran 5T Rear Impact Crash Sensor Left N/S 5Q0907651A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7641649

BMW F10 F20 F30 N20 125i 328i 528i N20 Wiring Harness Engine Module 1 7641649

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. M8A2-19J249-BF

Range Rover Evoque L551 Camera Control Module Unit ECU M8A2-19J249-BF

€208.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 038903143AG

VW Polo 9N MK4 Fabia II 1.4 TDI BMS Alternator Mount Support Bracket 038903143AG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5R3941329C

Volkswagen Caddy SB AdBlue Module Control Relay 2.0 TDI 5R3941329C

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05E907309CB

Audi Q2 GA 35 TFSI 1.5 DXDB Engine ECU Kit Ignition + Key 05E907309CB Manual

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 99161802502

Porsche Boxster 982 718 Cayman Fuel Pump Control Module ECU 99161802502

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2079001200

Door Module Mercedes C207 W207 Front Right O/S Control Unit ECU A2079001200

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3Q1959435C

Seat Ibiza KJ1 Keyless Go Control Unit Module ECU 3Q1959435C

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8652747-1

Mini Cooper R60 R61 ALL4 N18 1.6 122HP ECU DME Kit CAS3 2 Key 8611439 Automatic

€569.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0907311-1

Volkswagen Touareg 7P 3.0 TDI CASD 204HP Engine Unit ECU Set 7P0907311 Automatic

€693.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009005602

Mercedes W204 W212 Control Unit AMG Drive Select Module ECU A0009005602

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009050254

Mercedes W212 Negative Battery Cable Terminal Wiring A0009050254

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A9075402087

Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401305

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9389657

BMW F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module 9389657

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2045458401

Mercedes W204 Fuse Box Terminal Connection Unit A2115452301

€222.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420959655

Audi R8 42 Air Module Sensor Control Unit ECU 420959655

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8507908

BMW F20 Gearbox Transmission Harness Wiring Loom Manual 8507908

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6809051

BMW F20 LCI REM Rear Electronic Module Fuse Box Control 6809051

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6071500133

Engine Wiring Mercedes W176 W246 Diesel OM607 Loom Harness Cable A6071500133

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0959795J

Audi A5 8T Rear Door Module Control Unit Module ECU Left Right N/O/S 8T0959795J

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9483099

Mini Cooper One F55 F56 F57 Parking Assistant Control Unit Module 9483099

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9257104

BMW F01 F01N F02 F02N F04 F07 Seat Control Module Rear Left Right N/O/S 9257104

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G2972871D

Audi A6 C8 Power Steering Rack Sensor Control Unit Cable Wiring 4G2972871D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-13405-AF-2

Land Rover Discovery L550 Rear Lamp Tillight Plug Cable Left N/S FK72-13405-AF

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7411595

BMW F10 F20 F30 Control Unit For Fuel Pump Module 7411595

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059009230

Air Conditioning Module Mercedes W205 C253 A/C Control Unit ECU A2059009230

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06K907425N-1

Skoda Octavia Mk4 2.0TFSI DNPA 245HP Engine Control ECU Kit 06K907425N Automatic

€398.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6915327-1

BMW E46 E60 E81 E87 E90 E91 F10 F20 F30 2x Relay Make Contact Sky Blue 6915327

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0959793N

Audi Q5 8R Front Door Module Control Unit ECU Driver's Side 8K0959793N

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6569000200-1

Mercedes W213 E400d OM656.929 Diesel Engine ECU Kit A6569000200 Automatic

€569.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2465406607

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. C1BT-14B560-BCE

Ford Fiesta Mk7 Centre Console Wiring Loom Harness Cable C1BT-14B560-BCE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055401510

Mercedes C Class W205 Door Wiring Loom Harness Rear Right O/S A2055401510

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1765401602

Mercedes W176 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1765401602

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. XTE3971C

BMW E39 X5 E53 Carplay Head Unit Car Radio Stereo XTE3971C

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0907283

Audi A6 C6 FL Tire Pressure Control Module 4F0907283

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8M5T-15K857-BJA

Ford Focus Mk2 Centre Console Wiring Loom Harness Cable 8M5T-15K857-BJA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. F1FT-10C679-CB

Ford Transit Connect Mk2 Battery Negative Earth Lead Cable F1FT-10C679-CB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8486997

Mini F55 F56 F57 Integrated Supply Module Electrical Control Unit Module 8486997

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W6971036G

Audi A4 B9 A5 F5 Front Door Wiring Harness Cable Passenger Side 8W6971036D

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BK2T14B144BA

Ford Transit Custom MK8 2.2 TDCI Fuse Relay Box Unit Module BK2T14B144BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3A0972595A

Porsche Cayenne S 92a Harness Wire Connector Plug Loom 3A0972595A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9477152-2

Mini Countryman F60 Rear Tail Light Lamp Wiring Plug Socket Right O/S 9477152

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8E0035456D

Audi A4 B8 Telephone Aerial Antenna Signal Amplifier Module 8E0035456D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6Y0959121

Skoda Fabia Rs 6y Anti Theft Ultrasound Alarm Sensor Module 6Y0959121

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0959663H

Porsche Macan 95B Start Stop Voltage Stabilizer Converter Module 8K0959663H

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7848603-1

Alternator BMW F87 M2 F80 M3 F82 F83 M4 S55 Engine Generator 250A Denso 7848603

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0937615C-2

Seat Leon Mk3 5F Fuse Relay Box Module Electrical Control Unit 5Q0937615C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9211840

BMW F01 Wiring Loom Cable Harness 9211840

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0971845C

Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6937668

BMW X5 Series E53 Fuse Box Label Trim Cover Panel Sticker 6937668

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420941824

Audi R8 42 Spyder Fuse Box Battery Terminal Cover Housing Clamp 420941824

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9250456

BMW F12 Footwell Light Module Control Unit ECU FRM3 9250456

€132.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2769007300

Mercedes SL400 R231 276.825 333HP Engine Control Unit ECU A2769007300 Automatic

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5QA919294C

Audi Seat Skoda Volkswagen PDC Parking Sensor Control Unit Module 5QA919294J

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2115457301

Mercedes C219 Front Fuse Box SAM Relay Control Module A2115457301

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9186170

BMW 5 6 Series E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9186170

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2479001709

Mercedes W907 Radio Control Unit ECU Module A2479001709

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7188487

BMW E93 Convertible Battery Mounting Bracket Clamp Bolt Holder Mount 7188487

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8656997

BMW X5 F15 X6 F16 Ground Cable Negative Battery Lead Wire 8656997

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W5945076A-1

Audi A4 B9 Rear Tail Light Lamp Connector Plug Wire Outer Right O/S 8W5945076A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8602123

BMW i3 I01 Hybrid Electric Earth Ground Cable Line Strap Battery Lead 8602123

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. F1B1-12A650-ZC

Ford Fiesta St Mk7 Engine Control ECU 182HP 1.6 Petrol F1B1-12A650-ZC Manual

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1779069505

Mercedes C118 W177 H247 X243 Centre Console Ambient Light Wiring A1779069505

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DK52-14687-FD

Range Rover L405 Rear Door Ambient Light Wiring Harness Left N/S DK52-14687-FD

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DPLA-10E889-BH

Range Rover L405 Multimedia Sat Nav Display Screen Dashboard DPLA-10E889-BH

€327.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9811951

Mini Countryman R60 Paceman R61 Positive Battery Cable Wire Harness 9811951

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971100B

Audi A4 B8 Roof Interior Light Wiring Harness Cable Loom 8K0971100B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1439743

BMW E46 X5 E53 E60 E65 X3 E83 Z4 E85 Z3 Cable Alternator Starter 1439743

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. N9D3-14D618-AA

Range Rover Velar L560 Driver's Door Control Unit Module ECU N9D3-14D618-AA

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7539787

BMW Mini Cooper R55 R56 R57 R58 Negative Battery Cable 7539787

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. M8D2-12C525-AC

Range Rover Evoque L551 Engine Control Unit ECU Bracket Cooler M8D2-12C525-AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1718201726

Mercedes SLK R171 Seat Heated Heating Control Unit Module ECU A1718201726

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2118703126

Headlight Module Mercedes C209 W211 CLS C219 Level Control Unit ECU A2118703126

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7849393-1

BMW F20 F21 F30 F31 F32 Steering Wheel Heating Control Module Wiring 7849393

€123.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2721533291-1

Mercedes C219 Engine Control ECU Module 272 HP CLS 350 Automatic A2721533291 KIT

€569.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0937548F

Porsche Cayenne 92A Battery Distribution Fuse Box Relay Module 7P0937548F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L907309K-3

Seat Alhambra 7N Control Unit ECU 150 HP 2.0 Diesel 04L907309K Manual

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P5971537E

Porsche Cayenne S 92A Negative Battery Earth Cable 7P5971537E

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AB39-19H464-AB

Ford Ranger Mk6 Aerial Antenna Control Unit Module AB39-19H464-AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0035223D

Audi TT 8J Audio Amplifier Radio Sound BOSE Unit 8J0035223D

€569.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W6971035AN

Audi A5 F5 Front Door Wiring Harness Cable Driver's Side 8W6971035R

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DV6T-15K867-EE

Ford Transit Tourneo Connect Front PDC Parking Sensor Wiring Loom DV6T-15K867-EE

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2108208726

Mercedes-Benz W210 S210 Alarm Anti Theft System Control Module Unit A2108208726

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0971589H

Audi S3 A3 8P TT 8J R8 42 Steering Wheel Air Wiring Loom Harness 8J0971589H

€137.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G0971104D

VW Volkswagen Golf Mk7 Wiring Loom PDC Rear Harness Parking Sensor 5G0971104D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-14632-CC

Range Rover Evoque L538 Door Wiring Harness Rear Left N/O/S BJ32-14632-CC

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-14F026-AH

Land Rover Range Rover Evoque L538 Surround Camera ECU Control BJ32-14F026-AH

€474.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469009802

Mercedes W176 Radio Control Function Button Knob Controller Unit A2469009802

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9226880

BMW F20 F21 Radio Aerial Antenna Amplifier AM/FM Control Unit Module 9226880

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055409995

Mercedes C205 Pressure Sensor Wiring Loom A2055409995

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1669000618

Mercedes-Benz A B Class W176 W246 Front Right Door O/S Control Unit Module ECU

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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