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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Land Rover Discovery Sport L550 Evoque L551 Fusebox Control Unit K8D2-14A073-AD

€75.95

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Ford Mondeo Mk4 Galaxy Mk2 C-Max Radio CD Player Stereo Head Unit BS7T-18C815-AG

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5B79167

BMW F74 Gran Coupé FDR High REDE Control Unit ECU Front Driver Door 5B79167

€180.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6868932

BMW F10 F11 F13 F06 VDC Module Rear Suspension Level Control Unit Module 6868932

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H903018J-1

Audi A4 B8 A5 8T Q5 8R Alternator Generator Motor Petrol 06H903018J

€37.95

Free delivery: Nov 12 – 13

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Part no. A1665400224-1

Mercedes W166 Fuse Relay Box Fusebox Housing Cover Unit 3.0 Diesel A1665400224

€66.95

Free delivery: Nov 12 – 13

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Part no. CV4T-19C107-ND

Ford Kuga Mk2 Sync 3 Multimedia Head Unit Radio Stereo CV4T-19C107-ND

€189.95

Free delivery: Nov 12 – 13

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Part no. HK52-14B484-AD

Land Rover Range Rover L405 Tailgate Control Module Unit HK52-14B484-AD

€23.95

Free delivery: Nov 12 – 13

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Part no. CH22-19C166-AB

Land Rover Discovery 4 L319 Dual USB Socket Connection Port CH22-19C166-AB

€28.95

Free delivery: Nov 12 – 13

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Part no. 8W8959107E

Audi A5 F5 Rear Hatch Tailgate Boot Lid Control Module Unit ECU 8W8959107E

€32.95

Free delivery: Nov 12 – 13

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Part no. 99761822101

Porsche 911 Cayman 987 Boxster Crash Impact Sensor Left Right N/O/S 99761822101

€23.95

Free delivery: Nov 12 – 13

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Part no. 4M4915233AE

Audi A6 C8 Boot Battery Monitoring Control Module Unit 4M4915233AE

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7542934-1

BMW E60 E61 E65 N62N Petrol Alternator Generator 180A 14V 7542934

€89.95

Free delivery: Nov 12 – 13

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Part no. F57B-14B192-AA

Range Rover Sport L320 5-Pin Multi-Use Black Relay FoMoCo F57B-14B192-AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 7P0937548J

Porsche Cayenne 92A Fuse Box Module Hybrid 7P0937548J

€89.95

Free delivery: Nov 12 – 13

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Part no. 7P5971363CL

Porsche Cayenne S 92A Seat Wiring Harness Cable Loom Front Left N/S 7P5971363CL

€23.95

Free delivery: Nov 12 – 13

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Part no. A2218101817-1

Mercedes W221 Headlining Interior Mirror Rear Left Right N/O/S A2218101817

€23.95

Free delivery: Nov 12 – 13

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Part no. 7P5035481D-2

Porsche Cayenne 92A Sound Audio Amplifier Bose AMP 7P5035481D

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9456484

BMW G20 G21 330e Hybrid Charging Port Socket Cable 9456484

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0906093G

Audi A1 8X VW Seat Skoda Fuel Pump Control Unit Module 1K0906093G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055401542

Mercedes W205 Rear Door Harness Wiring Cable Left Right N/O/S A2055401542

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229001912

Mercedes W205 C253 Door Module Rear Left N/S Control Unit ECU A2229001912

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0907574B

Audi A4 A5 Q5 Yaw Rate Acceleration Sensor Module 8R0907574B

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2469000616

COMAND Head Unit Mercedes CLA C117 W176 W246 Nav Sat Radio Player A2469000616

€61.95

Free delivery: Nov 12 – 13

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Part no. 9267980

BMW F10 Fuse Location Diagram Map Fuse Grouping 9267980

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1329002300

Smart Fortwo C451 Engine Control 132910 71HP 1.0 Petrol Automatic A1329002300

€70.95

Free delivery: Nov 12 – 13

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Part no. 9468429

BMW F45 LCI Battery Cell Module Supervision Circuit Control Unit 225xe 9468429

€170.95

Free delivery: Nov 12 – 13

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Part no. 9241331

BMW X1 E84 USB AUX-IN Socket Plug 9241331

€23.95

Free delivery: Nov 12 – 13

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Part no. 8714773

BMW 5 G30 F90 M5 Door Wire Cable Harness Loom Wiring Front Driver's Side 8714773

€85.95

Free delivery: Nov 12 – 13

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Part no. A2479003808

Suspension Module Mercedes C118 W177 W247 Control Unit ECU A2479003808

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. TRIPL-CONVERTER

Trefor Tripl Cargo Charging Voltage Converter Electrical Unit Chennic 400W 35A

€108.95

Free delivery: Nov 12 – 13

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Part no. 8364522

BMW E64 Wiring Harness Loom Cable Connector Plug Wire 8364522

€23.95

Free delivery: Nov 12 – 13

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Part no. FK72-14633-BCD

Land Rover Discovery Sport L550 Door Wiring Rear Left N/S FK72-14633-BCD

€42.95

Free delivery: Nov 12 – 13

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Part no. 8044501

BMW F06 F10 F12 F13 LCI Fuel Injectors Wiring Loom Harness Cyl 1-4 S63N 8044501

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. C2S39829

Jaguar X-Type X400 Engine Bay Fuse Box Petrol 4X43-14A073-BF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7809944-7

BMW E70 Engine Control Unit ECU M57 3.0 Diesel 231HP Automatic 7810095

€180.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5189609

Ford Mondeo Mk5 Door Speaker Front Rear Left Right N/O/S DS7T-18808-DA

€23.95

Free delivery: Nov 12 – 13

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Part no. 6850424

BMW X3 F25 ICM Air Module Control Unit SRS ECU 6850424

€61.95

Free delivery: Nov 12 – 13

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Part no. 9365212

BMW X5 F15 Door Light Wiring Harness Cable Loom Front Left Right N/O/S 9365212

€89.95

Free delivery: Nov 12 – 13

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Part no. 9342242

Mini F54 F55 F56 Active Sound Design Radio Audio Amplifer Control Module 9342242

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A656B7

BMW F40 ACSM5 Control Unit Air Module ECU Control Module 5A656B7

€127.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4475402231

Mercedes W447 Sliding Door Wiring Loom Harness Right O/S A4475402231

€32.95

Free delivery: Nov 12 – 13

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Part no. HPLA-14301-AC

Range Rover Sport L494 Negative Battery Cable Wiring Loom HPLA-14301-AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229002308

Mercedes W205 S205 W222 Door Control Module ECU Rear Right O/S A2229002308

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q4959593R

Seat Leon Cupra Mk3 Front Door Control Module Unit Driver Side 5Q4959593R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DK52-14B673-AC

Range Rover Vogue L405 Upper Tailgate Control Module Unit DK52-14B673-AC

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9V4N-12A650-BG

Ford Kuga C394 Engine Control Unit ECU 200HP 2.5 Petrol 9V4N-12A650-BG Automatic

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. R8E2-14D617-AA

Range Rover L551 Front Door Control Unit Passenger's Side R8E2-14D617-AA

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. FW93-14F012-BD

Land Rover Discovery Sport L550 Tyre Pressure Control Module FW93-14F012-BD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9337233

BMW F32 F33 F82 F83 M4 Door Wiring Front Harness Loom Cable 9337233

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0971845

Seat Alhambra 7N Control Unit Module Bracket Mount Holder Support 7N0971845

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6977066

BMW X5 E70 Door Cable Harness Wiring 6977066 6937277

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L903023L-1

Audi A3 8V Diesel Engine Alternator Generator 14V 140A NAPA NAL1206

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5R3915343D

VW Volkswagen Caddy SB Battery Bracket Support Mount Holder Carrier 5R3915343D

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6461532591-2

Mercedes W639 111 CDI OM646 109HP Engine Unit Module ECU Kit A6461532591 Manual

€664.95

Free delivery: Nov 12 – 13

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Part no. 5A504F9

Mini F65 F66 BMW F70 Alternator Generator 180A 1.5 2.0 Petrol Engine 5A504F9

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K907425B-26

Volkswagen Golf Mk7 R 2.0 TFSI DJHA 310HP Engine ECU Kit BCM Key 04L907309B

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2035409213

Mercedes W203 Door Wiring Harness Front Left Right N/O/S Wiring Loom A2035409213

€27.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0941828B

Volkswagen Touareg 7P 3.0 TDI Fuse Box Control Module 7P0941828B

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6974890-MYS1

BMW E87 E90 E91 LCI PDC Sensor Ultrasonic Parking Mysticblau Blue Set x4

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5E5945112-2

Skoda Octavia Mk3 5E Rear Tail Light Lamp Wiring Cable Right O/S 5E5945112

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5P0951171C

Seat Altea 5P1 Interior Ultrasound Alarm Sensor Module Unit 5P0951171C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BS7T18C939DB

Radio CD Player Ford Mondeo MK4 Galaxy MK3 Sony DAB Radio Stereo BS7T-18C939-DB

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V4945075-1

Audi A3 8V Sportback Rear Lamp Taillight Inner Left N/S Harness Loom 8V4945075

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0907530E

Seat Leon 5F III Gateway Control Module Unit ECU 5Q0907530E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0971687L

Audi Q7 4L Rear Door Wiring Loom Harness Cable Left Right N/O/S 4L0971687L

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9291964

BMW 1 Series F20 Front Left Door N/S Wiring Loom Harness Cables 9291964

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3414469

BMW X3 E83 Fuse Grouping Front Stick-on Label Diagram 9267980

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CK52-14F641-AF

Range Rover L405 Digital TV Tuner Control Module Unit CK52-14F641-AF

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. EB3G-12B508-BB

Ford Ranger Mk3 Fusebox Bracket Fuse Box Panel Tray Mount EB3G12B508BB

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9339274

CAS4 Module BMW F01 F07 F10 F11 F12 X3 F25 Key Reading Control Unit 9339274

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 821850D090

Toyota Yaris P9 Tailgate Boot Lock Wiring Loom Harness Cable 821850D090

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2248296

BMW 3 X5 Series E46 E53 3.0d Diesel M57 Alternator Generator 150A 2248296

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G9959107C

Audi A6 C7 Tailgate Boot Trunk Rear Lid Control Module ECU Unit 4G9959107C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6900554

BMW E64 Connector Socket Plug Wire Harness Loom Wiring 6900554

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0959655N

Audi A3 8P Side Air Module Control Unit ECU 8P0959655N

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0907159A

Volkswagen Golf Mk6 Impact Sound Control Module Unit 5K0907159A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0907297A

Audi S5 8T Parking Aid PDC ECU Control Unit Bracket Holder Retainer 8K0907297A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775404107

Mercedes C118 W177 W247 Fuse Box Battery Relay Terminal A1775404107

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0915459F-1

Audi A6 C8 Power Disctribution Control Module 4K0915459F

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A8E799

BMW G20 Radio Multimedia Satellite Navigation Head Unit 5A8E799

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0919603

Audi Q3 8U Multimedia MMI Head-Up Display Screen 6" RMC Sat Nav 8U0919603

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G906056S-2

Audi A3 8P 1.9 TDI BLS 105HP Engine Control Unit ECU Kit 03G906056S Manual

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7581848-1

BMW E81 E87 LCI E90 116i 316i N45N ECU Kit DME CAS3 + Key 7581848

€455.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129061703-2

Mercedes S212 Rear Tail Light Lamp Wiring Harness Outer Left N/S A2129061703

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5S6Y-19G229-AB

Ford Fiesta St Mk5 Alarm Siren Horn 2.0 DURATEC ST150 N4JB 5S6Y-19G229-AB

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LR133289

Range Rover Sport L494 Transfer Box Wiring Harness 3.0 Diesel LPLA-13N850-BB

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 95863109602-2

Porsche Cayenne 92A Rear Tail Light Lamp Cable Wire Plug Right O/S 95863109602

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4475406453

Battery Cable Mercedes Vito W447 Diesel OM651 Alternator Wiring A4475406453

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2218705093

Mercedes W221 Door Control Module Unit ECU Rear Left Right N/O/S A2218705093

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2198200226

Door Module Mercedes C219 Rear Door Left N/S Control Module A2198200226

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8603352-7

BMW F20 F30 116i 316i N13 136HP Engine ECU Kit DME 8625241 FEM Key Lock Manual

€569.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G906016BF

Audi A6 C6 Engine Control Unit ECU 2.0 TDI 140HP BLB Diesel Manual 03G906016BF

€80.95

Free delivery: Nov 12 – 13

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Part no. 8662849-3

Mini Cooper S F55 F56 B48 192HP Petrol Engine ECU Kit DME 8662849 Manual

€664.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K8980551

VW Scirocco Mk3 Reversing Camera Rear View Parking Cable Wiring 1K8980551

€203.95

Free delivery: Nov 12 – 13

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Part no. 9210037

BMW X1 E84 Air Conditioning Heater Loom Harness Cable Wiring N47 9210037

€28.95

Free delivery: Nov 12 – 13

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Part no. 6R0971065

Volkswagen Polo 6R Parking Sensor Wiring Rear Bumper PDC Loom Cable 6R0971065

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9287756

Loudspeaker Centre BMW F25 F15 Central Woofer Audio Speaker 9287756

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03F906070FE

Audi A3 8P 1.2 TFSI CBZB 105HP Engine Control Unit ECU Kit Lock Key 03F906070FE

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

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