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 E90 Max Brose Footwell Light Module Control Unit FRM3R 9263803

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7799146

Mini R55 R56 Alternator Supporting Bracket Mount Generator Diesel W16 7799146

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0907361A

Volkswagen Golf Mk7 Leon Mk3 Fuse Relay Box Lid Cover 5Q0907361A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9257090

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9257090

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K2971615A

Audi A3 8P Engine Bay Wiring Holder Harness Loom Cable Guide Bracket 1K2971615A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2465400335

Mercedes W176 W246 Negative Earth Cable Battery Terminal Wiring A2465400335

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6824110

BMW 3 F30 LCI 330e Hybrid High Voltage Battery Wiring Loom Harness 6821420

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 070906016B

Volkswagen Phaeton 3D 5.0 V10 AJS 313HP Engine Control ECU 070906016B Automatic

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7823651

BMW F10 F11 Engine Wiring Loom Cable Harness Injector Module 520d N47N 7823651

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9282286

BMW X3 F25 Central Gateway Module Control Unit Lear ZGW-02 MID 9282286

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YQH500130

Land Rover Discovery 3 L319 Engine Compartment Fuse Panel Cover Lid YQH500130

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR007373

Land Rover EVOQUE L538 2.2 TDCI Diesel Engine Starter Motor LR007373

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7PP907279BT

Porsche Macan 92A Body Control Unit Module BCM 7PP907279BT

€455.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6944499

BMW 5 6 Series E60 E61 E63 Passenger Side Door Airbag Control Module 6944499

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR105985

Land Rover Discovery Sport L550 Alternator 14V 230 Amp 2.0 Diesel GX7310300DF

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2214407910

Mercedes W221 Rear Door Wiring Loom Harness Cable Left Right N/O/S A2214407910

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A4A9D6

BMW G20 Front Door Wiring Harness Cable Driver Side 5A4A9D6

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1779008511

Door Module Mercedes W177 W247 Rear Left Right N/O/S Control Unit A1779008511

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971030CH

Audi A4 B9 Front Door Wiring Loom Harness Passenger Side 8W0971030CH

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6397602004

Bowden Cable Mercedes W639 Rear Right O/S Sliding Door Handle Catch A6397602004

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009000346

Mercedes W177 Engine Alternator Generator M282 A0009000346

€251.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0906093C

Audi Q7 4L A8 D4 Fuel Pump Control Unit Module ECU Diesel 4H0906093C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6928523

BMW 3 Series E46 M47N Diesel Negative Earth Cable Battery 6928523

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0937503

Audi A6 C6 R8 42 Dashboard Fuse Box Electrical Relay Unit 4F0937503

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018AJ-2

Audi A3 8P 2.0 TDI 170HP CFGB Engine Control Unit ECU 03L906018AJ Manual

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q4959593K

Seat Ateca Door Module Control Unit Front Driver's Side Door 5Q4959593K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KG9T-14D068-NA

Ford Mondeo Mk5 Fuse Box Control Unit Module KG9T-14D068-NA

€118.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A9075402605

Mercedes W907 Fuse Box Control Unit Module Q2 A9075402605

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0937517B

Audi RS4 B8 Positive Battery Distribution Terminal Junction Relay Box 8K0937517B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8U0907468G

Audi Q3 8U Gateway Interface Control Module Unit ECU 8U0907468G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2218707385

Mercedes W221 Rear DVD Entertainment System Video Player Unit A2218707385

€370.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0035225J

Audi A1 8X Antenna Booster Amplifier Upper Rear Right O/S 8X0035225J

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018CR

Seat Ibiza 6J IV Mk4 2.0 TDI CFHD Engine Control Unit ECU Set 03L906018CR Manual

€222.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2139004119

Module Mercedes W205 Drivetrain Gearbox Control Module Unit A2139004119

€104.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4L2910401B-1

Audi Q7 4L 3.0 TDI CRCA Quattro Engine ECU Kit Lock + Ignition + Key 4L2910401B

€854.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-F260145-CC

Land Rover Range Rover L405 Negative Earth Battery Cable Lead CK52-F260145-CC

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129004414

Door Module Mercedes W204 W212 Rear Right O/S Control Unit Module A2129004414

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HK72-18C847-CA

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit HK72-18C847-CA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. RVH000046

Land Rover Discovery 3 L319 Air Suspension Valve Control RVH000046

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06M907309D-4

Audi S5 F5 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit BCM + 2 Key 06M907309D

€455.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K5971687BA

Audi A6 C8 Door Wiring Cable Harness Loom Rear Left Right N/O/S 4K5971687BA

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9367700

BMW X6 F16 PDC Bumper Park Assist Wiring Harness Loom 9367700

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6401500734-2

Mercedes W169 W245 OM640.941 140HP Engine Control ECU Kit A6401500734 Automatic

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8583423-3

Mini R60 Cooper SD N47N 2.0 143HP Engine ECU Kit DDE 8583423 CAS3 Key Manual

€194.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6868724

BMW X5 F15 F85 X6 F16 F86 ICM Control Unit ACC Support V-5.7 6868724

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. FV6T-14324-BBB

Ford Transit Connect Mk2 Starter Earth Ground Wire Cable FV6T14324BBB

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1Q0919283A

Volkswagen Eos 1F Parking Aid PDC Sensor Control Unit Module ECU 1Q0919283A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. XUC000262A

Land Rover Discovery 3 L319 Aerial Antenna Amplifier Module Unit ECU XUC000262A

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7951288

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 7951288

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6957330

BMW E60 E61 E63 Power Distribution Electrical Fuse Box 6957330

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4159007503

Mercedes Citan W415 Body Control Module Unit BCM ECU A4159007503 284B18276R

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6926445

BMW 5 Series E60 E61 LCI Heated Front Seat Control Module 6926445 9182128

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5A7A0B5

BMW F70 F74 X1 U11 X2 U10 Engine Wiring Loom Harness Cable B38 Petrol 5A7A0B5

€146.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6G9T-14A631-BF

Ford Mondeo Mk4 Rear Door Wiring Loom Harness Cable Left N/S 6G9T-14A631-BF

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2709000900-10

Mercedes W176 A 180 270.910 122HP Blue Efficiency ECU Kit A2709000900 Automatic

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q4959592P

VW Caddy SB Door Module Control Unit Front Passenger's Side Door 5Q4959592P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9316575

BMW 1 2 Series F20 F21 F22 Battery Cable Lead Positive Underfloor 9316575

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0803219C-1

Battery Clamp Golf R Mk7 Audi A3 S3 8V Battery Base Bracket Holder 5Q0803219C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9269956

BMW X1 Series E84 Cable Loom Door Passenger Side Wiring Harness 9269948

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0959792Q

Audi A5 8T Front Door Control Module Passenger Side 8T0959792Q

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8643126

BMW F06 F12 F13 M6 F10 M5 S63N 560HP Engine Control Module 8643126 Automatic

€541.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2034400033-2

Mercedes CLC CL203 Wiring Loom Cable Door Front Left Right N/O/S A2034400033

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4E0959655K

Audi A8 4E S8 D3 SRS Bag Control Air Module Unit Bosch 4E0959655K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9462544

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 9462544

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L5951171

Porsche Cayenne 92A Immobilizer Alarm Control Unit Sensor Module 7L5951171

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0906093G

Audi A4 B9 A5 F5 Petrol Engine Fuel Pump Control Unit Module 8W0906093G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K0035502B

Audi A5 F5 A6 C8 Wireless Centre Console Phone Charging Module Unit 4K0035502B

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2045420323

PDC Display Mercedes W204 Front Parking Sensor Screen Control Unit A2045420323

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9199996

Holder BMW F13 TV Video Switch Control Module Unit Bracket Mount 9199996

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CX23-18K891-AA

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit CX23-18K891-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6397600204

Bowden Cable Mercedes W639 Door Handle Catch Top Rear Right O/S Wire A6397600204

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971687B

Audi A4 B8 Door Harness Loom Cable Wiring Rear Left Right N/O/S 8K0971687B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-14290-AGD

Range Rover Evoque L538 Fuse Box Relay Wire Harness BJ32-14290-AGD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2229001814

Door Module Mercedes W205 X253 Rear Left N/S Control Unit A1698209126

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 99761266100

Porsche Boxster Cayman 987 Rear Bumper PDC Parking Sensor Wiring 99761266100

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-14A073-CB

Range Rover L405 Fuse Relay Box Housing Diesel CK52-14A073-CB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7810863

Battery Cable BMW X3 F25 Wire Lead Positive Alternator Starter B+ 7810863

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8576341-13

BMW F20 F21 116d 116HP N47N Engine ECU Control Unit DDE Kit 8576341 Manual

€165.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9441865

Head Unit BMW F20 F21 F22 F30 F31 LCI Radio CD Player Navigation GPS 9441865

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1870892

Ford Mondeo Mk5 Starter Motor 12V 2.0 TDCi Diesel DS7T-11000-LE

€70.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HPLA-7C078-BKD

Range Rover Sport L494 Automatic Gearbox Wiring Loom Harness HPLA-7C078-BKD

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971534A

Audi A4 B9 A5 F5 Earth Minus Negative - Battery Wire Cable Lid 8W0971534A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6842986

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 6842986

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CK52-18C951-AC

Range Rover L405 Speaker Wiring Loom Harness Cable CK52-18C951-AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6808577

Mini F55 F56 BDC Body Domain Controller Control Unit Module 6808577

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971035R

Audi A4 B9 Front Door Wiring Harness Cable Loom Driver Side 8W0971035R

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2025402373

Mercedes W169 W203 W204 W211 OBD Diagnostic Plug Cover A2025402373

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6F0971199

Seat Ibiza Mk5 Fr Door Wire Wiring Harness Loom Cable Front Left N/S 6F0971199

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2118205885

Mercedes E-Class S-Class W211 W220 Nokia Phone Control Unit Module ECU

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A4515400906

Smart Fortwo C451 Front Door Wiring Harness Cable Driver Side O/S A5415400906

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. HY32-14A597-BA

Land Rover Range Rover Velar L560 Sun Light Sensor HY32-14A597-BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9270354

Mini F54 F55 F56 F57 F60 Rear Electric Power Distribution Fuse Box 9270354

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P0927601

Oil Pump Control Audi Q7 4L Volkswagen Touareg 7P Module Unit ECU 7P0927601

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8P7959655

Audi A3 8P Air Module SRS System Control Sensor ECU Unit 8P7959655

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6938664

BMW E65 E66 Control Unit Front Centre Console Module 6938664

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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