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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Volkswagen Caddy Mk2 Front Door Wiring Harness Cable Passenger Side 2K0971121AK

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044401005

Mercedes-Benz C W204 Rear Left N/O/S Right Door Wiring Loom Harness A2045407609

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5QF959351

Seat Ibiza Mk5 Crash Impact Sensor Accelerator Sensor Control Unit 5QF959351

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1329002500

Smart C451 Engine Control Unit ECU 1.0 Petrol M132.910 71HP A1329002500 Manual

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 99161030104

Porsche 718 Boxster 982 Power Distribution Control Unit 99161030104

€313.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0959595B

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9134666

Seat Module BMW E87 E90 E91 E92 Control Unit ECU 9134666

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009050410

Mercedes W176 W205 C207 W212 Front Radar Distance Sensor Unit Module A0009050410

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2447799

BMW M6 F13 X3 F25 F32 F33 Bluetooth Telematic Control Module Unit 2447799

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009053006

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

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9267200-1

BMW E92 ECU Body Control Module Junction Box L1 PL2RR JBBFE 9267200

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7199998

Mini R52 Cabrio Convertible Folding Top Roof CVM Module Control Unit 7199998

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9348935

BMW X1 F45 F48 Mini F55 F56 F60 Air Module Control Unit Module ECU 9348935

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9866979

BMW F20 F21 F30 F31 Rear Electronic Module Fuse Box Control Unit V2 REM 9866979

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. EB3T-14603-C

Ford Ranger Mk3 Positive Terminal HV Battery Lead Cable Wire Harness EB3T14603C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-14301-AB

Land Rover Discovery L550 Negative Battery Cable Lead Wire FK72-14301-AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9210135

BMW F07 GT Rear Door Wiring Loom Cable Harness 9210135

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L5035225B

Porsche Cayenne 9PA Radio Aerial Antenna Amplifier Unit Rear Left N/S 7L5035225B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059004013

Mercedes W205 Air Conditioning Control Module A/C ECU Unit A2059004013

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9354389

Mini F55 F56 F57 Central Cover Information Instrument Radio 9354389

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8707750

BMW F20 F21 F22 F23 F87 M2 Body Domain Controller BDC Module FEM 8707750

€279.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9379832

BMW X3 F25 X4 F26 Door Wiring Loom Harness Cable Driver's Side 9379820

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0004461160

Mercedes Sprinter W906 FleetBoard Onboard Time Recorder Control Unit A0004461160

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7583740

BMW Z4 E89 Earth Battery Cable Wiring Loom Harness Line 7583740

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A2D542

BMW F40 Body Control Module Domain Controller Unit BDC ECU 5A2D542

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P6945207-2

VW Touareg 7P Rear Tail Light Lamp Wiring Harness Cable Plug Right O/S 7P6945207

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9362395

BMW F20 F30 F31 F34 Electrical Body Control Unit Module REM V2 9362395

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 09G927750CA

Audi TT 8N Automatic Gearbox Module Control Unit ECU 09G927750CA

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7649755

Mini Countryman F60 Engine Fuse Box Harness Cable Guide B48M 2017-2024 7649755

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2135409916

Earth Ground Cable Mercedes W213 S213 Battery Wiring Loom Engine A2135409916

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8U0971035L

Audi Q3 8U Door Loom Wiring Harness Cable Front Right O/S 8U0971035L

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4L0910441B-1

Audi Q7 4L Rear Reversing Camera View Module Control Unit ECU 4L0910441B

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YIE500090

Land Rover Discovery 3 L319 Sat Nav Radio Multimedia Display Screen YIE500090

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1167294

Mini Cooper One R50 R52 Fresh Air Recirculating Actuator 1167294 6NN007626

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9196591

BMW E88 Cabrio Convertible Folding Top Roof ECU Module CVM6 9196591

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GHCT-14A624-AJA

Land Rover Discovery Sport L550 Wire Loom Harness Connector GHCT-14A624-AJA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-14F041-AB

Land Rover Discovery Sport L550 Fuse Box Relay Module 2.2 Diesel FK72-14F041-AB

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7PP919193AF

Porsche Cayenne Turbo 92a Radio CD Player Digital Display Unit 7PP919193AF

€550.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5B61812

BMW X1 U11 GPS Navigation Audio Radio Infotainment Head Unit Control 5B61812

€522.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0915181A

Porsche Cayenne 92A Battery Negative Ground Cable Wiring Earth Line 7P0915181A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2469005413-1

Mercedes C117 Head Unit Radio Player Control Module Becker A2469005413

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 0AM911023T

Volkswagen Touran 1T 1.4 TSI Petrol Engine Starter Motor 0AM911023T

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129003314

Mercedes W204 Front Fuse Box Relay Control Unit SAM Module A2129003314

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7E0035156B-1

Volkswagen Transporter T5 Golf Mk6 Radio CD Player Head Unit 7E0035156B

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. K6D3-9A462-BB

Range Rover Sport L494 Exhaust Heat Shield 3.0 Diesel K6D3-9A462-BB

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G0971104S

Volkswagen Golf Mk7 Rear Bumper PDC Parking Sensor Wiring Loom 5G0971104S

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0971641E

Audi A8 D4 Centre Console Wiring Loom Cable Harness 4H0971641E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3Q0907530L

VW Volkswagen Golf SV Gateway Control Unit Module ECU GW MQB High 3Q0907530L

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8513559

BMW X3 F25 30dX N57N Engine Module Injector Wiring Cable Loom Harness 8513559

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2118704926

Seat Module Mercedes W164 W203 W211 C219 Front Memory Control Unit A2118704926

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9383063

Mini Cooper F55 F56 Navigation DAB Head Unit Sat Nav Professional 9383063

€233.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 443937105B-1

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BENZB2007005

Mercedes W169 W245 Hizpo Head Unit Navigation Multimedia Screen 7" GPS Android

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8E0907559H

Audi A4 B7 3.2 FSI Quattro AUK 255HP Engine Control Unit ECU 8E0907559H Manual

€208.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2218207389

Mercedes W221 Seat Headrest Display Monitor Rear Entertainment Unit A2218207389

€218.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059911024E

Audi Q7 4L VW Touareg MK2 3.0 TDI Diesel Starter Motor 059911024E

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HB3T-14303-DA

Ford Ranger T6 Mk1 Radio Suppresion Cable Wiring Harness HB3T-14303-DA

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9379845

BMW X3 F25 X4 F26 Door Wiring Loom Harness Cable Passenger's Side 9379834

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6807322

Positive Cable BMW F90 M5 G30 Battery Wire Lead Underfloor Wiring 6807323

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8512498-5

BMW E84 E90 LCI 20dX 320xd N47 177HP ECU Kit DDE 8512498 CAS3 + Key Manual

€151.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9200944

BMW 3 X1 E84 E91 Ultra Sonic Burglar Alarm System Sensor Module 9200944

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9159034

BMW 1 Series E87 LCI CCC CD Professional Navigation System Controller 9159034

€265.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0971230FA

Audi S3 8V Alternator Wiring Harness Set Three Phase 5Q0971230FA

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055457540

Mercedes W205 C238 X253 W213 Inner Firewall Contact Support A2055457540

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4M0959592N

Audi Q7 4M Front Door Module Control Unit ECU Passenger Side 4M0959592N

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G0035711

Audi A6 S6 C7 Hands Free Microphone Module 4G0035711

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A9075404687-1

Mercedes W907 Battery Cable Alternator Wiring Loom Harness Cabling A9075404687

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6814187-1

Audio Module BMW F20 F30 F31 F32 Operating Unit FBM Control Panel 6814187

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR080305

Land Rover Discovery 4 L319 Engine Starter Motor 3.0 Diesel CPLA-11001-BF

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 80A971235

Audi Q5 Mk2 FY Negative Battery Earth Cable Terminal Lead 80A971235

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8590019

BMW G30 G31 Engine Wiring Harness Supply Line Cable 530d B57 Diesel 8590019

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. K1BY-12A650-BA

Ford Fiesta Mk8 ST Engine Control Unit Module ECU 1.5 EcoBoost K1BY-12A650-BA

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129007104

Mercedes W212 SAM Module Control Unit Electrical Fuse Box Unit A2129007104

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. EH22-14F681-AF

Land Rover Discovery 4 L319 Parking Aid Distance Control Module EH22-14F681-AF

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8R0971502A

Audi Q5 8R Battery Fuse Box Terminal Retaining Mount Bracket Holder 8R0971502A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9207075

BMW X3 X5 Series E83 E53 Telematics Control Unit Module 9207075

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YMM501394A

Range Rover Sport L320 Rear Door Wiring Harness Cable YMM501394A

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5M51-12A650-MB

Ford Focus Mk2 Engine Control Unit 136HP ECU KIT 2.0 TDCI 5M51-12A650-MB

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8516122

Battery Cable BMW X5 F15 X6 F16 Alternator Starter Wiring Loom Harness 8516122

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2Q0915181

Audi Polo Mk6 Battery Negative Minus Battery Monitoring Sensor 2Q0915181

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FK72-14F681-AG

Land Rover Discovery Sport L550 Gateway Control Module ECU FK72-14F681-AG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0971765

Audi A6 C6 Wing Mirror Adjustment Switch Wiring Loom Cable 4F0971765

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0025463141

Mercedes A209 C209 Line Connector Terminal Point Positive Lead Fuse A0025463141

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2K0971557F

Volkswagen VW Caddy 2K Door Harness Loom Cable Wiring Front Left N/S 2K0971557F

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2213201058

Mercedes R231 Valve Block Air Suspension Control Unit A2123200358

€203.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8677247

Mini Countryman F60 Cable Alternator Starter Wire 12428677247 8677247

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3B0035711B

Seat Leon Mk3 5F Hands Free Microphone Module Speaker Wiring Loom 3B0035711B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7E0919475D

Volkswagen Transporter T5 Parking Aid Sensor Control Module ECU 7E0919475D

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8574752-1

BMW F25 20dX B47 190HP Engine Unit ECU Kit DDE 8574752 CAS4 Key Automatic

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9366339

BMW G32 GT Door Wiring Harness Loom Cable Rear Left Right N/O/S 9366339

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8H1971035CN

Audi A4 B7 Convertible Front Driver Side Door Wiring Harness 8H1971035CN

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9324781

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9324781

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2048207485

Mercedes W204 Front Door Control Unit Module Right O/S A2048207485

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1729058300

Mercedes SLK R172 Pedestrian Protection Impact Crash Sensor Module A1729058300

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8634124

BMW F40 F45 X1 F48 Mini F55 F56 F60 Alternator Generator Denso 120A 8634124

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BK3T-14B446-HC

Ford Transit Mk8 Slam Panel Sensor Cable Wire Harness Cable Front BK3T-14B446-HC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4159066300

Mercedes W415 Starter Motor Diesel 607951 A4159066300

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9855653

BMW F40 F74 F78 Power Distribution Box Mount Bracket Holder 9855653

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8590041

BMW G30 G31 B47 Diesel Glow Heater Plug Engine Wiring Loom Cable 8589786

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

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