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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Radio CD Player Mercedes W176 W246 COMAND Nav Sat Head Unit A2469006710

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8S0907159A

Audi TTS FV Impact Sound Control Unit Module 8S0907159A

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8652443

BMW F45 Wiring Harness Motor Sensor System Module 8652443

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2115460580

Wiring Holder Mercedes W211 Cable Loom Harness Cover Channel A2115460580

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1644400837

Mercedes W164 Parking Sensor Wiring Loom Cable Harness Front PDC A1644400837

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2125400382

Mercedes W212 Cover Fuse Box Trim Panel Lid A2125400382

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7N0959794L

Seat Alhambra 7N Rear Door Control Module Unit ECU Right O/S 7N0959794L

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. DH22-14B192-BA-1

Range Rover Evoque L538 Relay 4-Pin Unit 12V 20A Set x3 DH22-14B192-BA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9252010

BMW X5 X6 F15 F16 Rear Seat Heating Switch Button Panel Cover 9252010

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2038202285

Mercedes-Benz C-Class W203 Door Control Module Right Rear O/S A2038202285

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P4971036E

Audi A3 8P Front Door Card Wiring Loom Harness Passenger Side 8P4971036E

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7P5910566C

Porsche Cayenne Turbo 92a Blind Spot Detection Control Unit ECU 7P5910566C

€108.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 11130287

Vauxhall Movano C 4-Pin Relay Unit 12V 50A Omron Black 11130287

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8594487

BMW F45 Mini F56 Positive Battery Alternator Starter Cable Wiring 8594487

€23.95

Free delivery: Sep 15 – 16

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Part no. 8585269

Mini R55 R56 R57 R60 R61 Engine Wiring Harness Loom Cable 8585269

€85.95

Free delivery: Sep 15 – 16

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Part no. A2034400033

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 03L911021E

Audi A4 B8 Starter Motor Engine Motor Actuator Diesel Bosch 03L911021E

€37.95

Free delivery: Sep 15 – 16

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Part no. 3449505

Mini Cooper One R55 R56 Fuse Distribution Box Cover Trim Cap 3449505

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8T0959795H

Audi A4 B8 Door Control Module Unit ECU Rear Left Right N/O/S 8T0959795H

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 1K3959857B

Volkswagen Polo 6R Golf Mk6 3-Door Window Lifter Switch Driver's Side 1K3959857A

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2124405806

Mercedes W204 W212 Travel Monitor Sensor Wiring Loom Harness Cable A2124405806

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W2035043K

Audi A5 B9 Sportback Radio Stereo Sat Nav Multi Media Head Unit 8W2035043K

€341.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6958358

BMW 5 X5 Series E39 E53 Hands-free Electronics Charging Module MULF 6958358

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2055455100

Mercedes W205 W213 C238 Power Distribution Unit Busbar Connector A2055455100

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6812217

BMW X1 F48 Cable Loom Door Rear Left Right N/O/S Wiring Harness 6840095

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. KK3T-15604-FAJ

Ford Transit Custom Mk8 BCM Body Control Module Fuse Box Unit KK3T-15604-FAJ

€70.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2GA907159

VW Volkswagen T-Roc Mk1 Body Sound Control Unit Module ECU 2GA907159

€89.95

Free delivery: Sep 15 – 16

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Part no. 240801846R

Renault Trafic III Vauxhall Vivaro B Positive Battery Cable Lead Wire 240801846R

€23.95

Free delivery: Sep 15 – 16

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Part no. FK72-10C652-AC

Land Rover Discovery Sport L550 Relay Box Wiring Loom FK72-10C652-AC

€23.95

Free delivery: Sep 15 – 16

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Part no. A2129004711

Mercedes W204 W212 Front Fuse Box Relay Control Unit SAM Module A2129004711

€232.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9387232

BMW F45 F46 Body Domain Controller BDC Control Unit Module LR01 ECU 9387232

€156.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8T8971030K

Audi A5 8T Front Passenger Door Wiring Harness Loom Cable 8T8971030K

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6519009002

Mercedes W212 E300 BlueTEC Hybrid 204HP Engine Control Module ECU A6519009002

€113.95

Free delivery: Sep 15 – 16

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Part no. A1645450201

Fuse Box Mercedes ML W164 W251 OM642 Diesel Relay Module Unit A1645450201

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1175401205

Mercedes C117 Drivers Door Wiring Harness A1175401205

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8617722

Wiring Harness BMW F48 Mini F55 F56 B38 Petrol Engine Servotronic Module 8617722

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0038206926

Mercedes W221 Door Control Module Unit ECU Rear Left N/S A0038206926

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. M8D2-14369-GB

Land Rover Discovery Sport L550 Front Parking Sensor Wiring Loom M8D2-14369-GB

€218.95

Free delivery: Sep 15 – 16

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Part no. ROSEN-Q74L-SEAT-SET

Audi Q7 4L Headrest Screen DVD Player Set Digital

€336.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2709002100-18

Mercedes W176 A45 4-Matic M133.980 Engine Control ECU Kit Automatic A2709002100

€503.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P4945093B-2

Audi A3 8P Rear Tail Light Lamp LED Wiring Harness Cable Left N/S 8P4945093B

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8507912

BMW F30 F31 Engine Wiring Loom N47N Harness Automatic Gearbox 7549282

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8T0971029

Audi A5 S5 8T Front Door Wire Wiring Loom Harness Driver's Side 8T0971029

€23.95

Free delivery: Sep 15 – 16

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Part no. A2115452647

Bracket Mount Mercedes W211 W219 Control Unit Module SAM Holder A2115452647

€23.95

Free delivery: Sep 15 – 16

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Part no. 8X0035110C

8X0035110C A1 8X A4 B8 A5 8T CD Player Changer 6 Disc 8X0035110C

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 83A962239

Audi A3 8Y Q3 F3 Rear Hatch Boot Lid Tailgate Opening Cable Wiring 83A962239

€70.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1698207426

Mercedes-Benz A B Class W169 W245 Door Control Unit Right O/S Rear A1698207426

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4L0698007A

Audi Q7 4L Air Suspension Level Height Adjustment Compressor Pump 4L0698007A

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2319009106

Door Module Mercedes R231 Front Door Right O/S Control Module A2319009106

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7555361-11

BMW E91 325i N52 Engine Control Unit ECU 218HP Automatic 2.5 Petrol 7555361 KIT

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6C11-3C190-AB

Ford Transit MK7 Yaw Sensor ESP Rotation Rate Control Unit Module 6C11-3C190-AB

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 03L903143K

Audi A4 B8 2.0 TDI Alternator Mount Tensioner Pulley Bracket Support 03L903143K

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5B87854

BMW F74 Gran Coupé Air Module ECU Control Unit 5B87854

€531.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9319433

Mini R61 Sat Navi Stereo Radio Audio Head Unit Player 9319433

€284.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8T0971030C

Audi A5 8T Coupe Front Door Wiring Loom Harness Passenger Side 8T0971030C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 992941572CD

Skoda Octavia Mk4 Headlight Headlamp LED Control Module Unit 992941572CD

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7515197

BMW Mini Cooper One R50 W10 Battery Cable Plus Pole 7515197

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4M0959793E

Audi A4 B9 A5 F5 Front Door Control Unit Module ECU Left N/S 4M0959793E

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2475450001

Mercedes W177 48V Additional Battery Holder Mounting Bracket A2475450001

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. GJ32-14630-DCD

Range Rover L538 Door Wiring Loom Cable Front Passenger's Side GJ32-14630-DCD

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5F0945207F-2

Seat Leon Mk3 Rear Tail Light Lamp Outer Left N/S Harness Wire Cable 5F0945207F

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LR094544

Land Rover Range Rover Sport L494 Bus Bar Link Battery Negative Cable LR094544

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. LX73-14A073-HA

Land Range Rover Velar L560 Fuse Box Module Unit 2.0 Hybrid LX73-14A073-HA

€108.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. FV6T14324BAB

Ford Transit Connect Mk2 II Starter Earth Ground Wire Cable FV6T14324BAB

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7534921-1

BMW 3 X3 Z4 Series E46 E83 E85 Engine Control Unit Box Bottom Part 7534921

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P4945094B-2

Audi A3 8P Rear Tail Light Lamp LED Wiring Harness Cable Right O/S 8P4945094B

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 1C0909605A

VW Volkswagen Transporter T5 Air Module Control Unit Module ECU 1C0909605A

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9292350

Battery Terminal Cover BMW X3 F25 X5 F15 Trim Panel Base B + Positive 9292350

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W0947356E

Audi A5 S5 F5 Interior Door Panel Courtesy Light LED Wiring Harness 8W0947356E

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 07Z911023BX

Volkswagen Phaeton 3D Engine Starter Motor Acutator 5.0 V10 Diesel 07Z911023BX

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2319014702

Mercedes R231 Air Module Control Unit ECU SRS Module A2319014702

€284.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. FK72-19H406-AH

Land Rover Discovery Sport L550 Front Lane Assist Camera FK72-19H406-AH

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8K0971845A

AUDI A5 8T 2.0 TDI CGLC Fuse Relay Box Power Distribution 8K0971845A

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4G0971765

Audi RS6 C7 Mirror Wing Adjust Switch Loom Harness Wiring Cable 4G0971765

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. CPLA-14E705-AA

Range Rover L405 Rear Seat Control Module Unit CPLA-14E705-AA

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5H22-78502D70-AB

Land Rover Discovery 3 L319 Electric Sunroof Control Module 5H22-78502D70-AB

€61.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. DE8T-19H463-DA

Ford Focus Mk3 Front Windscreen Rain Sensor Control Unit Module DE8T-19H463-DA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0009058100

Mercedes ML W166 GL X166 SL R231 C292 Crash Impact Sensor A0009058100

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. CMR-2000

Ripspeed Radio CD MP3 Player AUX USB Memory SD Card Reader CMR-2000 4x50W

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 059911022

AUDI Q5 8R Quattro 3.0 TDI Diesel CCWA CCWB Starter Motor 059911022

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0035061J

Audi A8L 4H Head Unit Radio CD Player Navigation GPS 4H0035061J

€398.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W0907777E

Audi A4 B9 A5 S5 F5 Chassis Module Control Unit EFP 8W0907777E 8W0907777C

€222.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9811260

BMW Mini Cooper R60 Wiring Passenger Loom Front Door Cables Left N/S 9811260

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5WA907530H

Skoda Octavia IV Volkswagen Golf Mk8 Gateway Control Unit Module ECU 5WA907530H

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7641661-1

BMW F10 F20 F30 Wiring Harness Motor Sensorsystem Module Petrol N20

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5M5T-14B192-EA-2

Ford Mondeo Focus Multi Use Grey Relay 12V 70A 4 Pin 5M5T-14B192-EA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2415523

Ford Fiesta MK8 ST Engine Starter Wiring Loom Cable 1.5 EcoBoost K1BT-14B060-CAC

€56.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 95860762700

Porsche Cayenne 92A Injector Wiring Harness Cylinder 4-6 Engine 95860762700

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. F1FT10C679BA

Ford Transit Mk7 V Negative Battery Terminal Cable Wiring F1FT10C679BA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9321022-1

Mini Cooper F55 F56 F57 B+ Junction Terminal Box 300-400 W 9321022

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5N0035342E-1

VW Volkswagen Polo 6R Multimedia Control Interface Bracket Retainer 5N0035342E

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. DH22-14B192-EA-1

Land Rover Discovery Sport L550 Relay 4-Pin 12V 70A Grey Set X4 DH22-14B192-EA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8506657

BMW X3 F25 Starter Motor Diesel Engine 12V Bosch 8506657

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7856771

Injection Wiring BMW F90 M5 F91 M8 S63M Cyl. 1-4 Loom Valve Ignition 7856771

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8P4945095C-2

Audi A3 8P Rear Tail Lamp Light Wiring Harness Plug Inner Left N/S 8P4945095C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4L0907428

Audi Q7 4L Parking Aid Camera Control Module ECU 4L0907428

€246.95

Free delivery: Sep 15 – 16

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Part no. 8366282-1

BMW Z1 Z3 E32 E36 E38 E46 X5 E53 Connection Plug Golden Brown Set x2 8366282

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8H0035225K

Audi A4 S4 B6 B7 Cabrio Aerial Amplifier Attachment Parts Left N/S 8H0035225K

€89.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4N0035446

Audi A3 RS3 8V Aerial Antenna Amplifier Control Module Unit 4N0035446

€113.95

Free delivery: Sep 15 – 16

If paid before 14:00

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