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 7 Series E65 E66 E67 Control Unit Door Rear Driver Side 6933270

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8716575

BMW G20 G21 G21 LCI Door Wiring Harness Loom Front Driver's Side 8716575

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9299268

BMW F20 F21 F22 F30 F31 F32 F33 F34 GT Radio Player CD DAB Head Unit 9299268

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KG9T-2B392-ED

Ford Mondeo Mk5 Front Height Level Sensor Wiring Cable Adapter KG9T-2B392-ED

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0959354A

VW Volkswagen Tiguan AX1 Front Air Module Crash Impact Sensor Unit 5Q0959354A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8580061

BMW F40 F48 Mini F55 F56 Battery Starter Cable Wiring Loom B47B B47D 8580061

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2215408609

Mercedes W221 Rear Door Wiring Harness Cable Left N/S A2215408609

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6C1T-14A076-BB

Ford Transit Mk7 Fuse Box Cover Electrical Unit Housing Trim Cap 6C1T-14A076-BB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8513157

Battery Electric Cable BMW F45 F48 Mini F56 F60 Alternator Starter Motor 8513157

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05L907309AD-1

VW Transporter T6.1 2.0 TDI DNAB 110HP Engine Control ECU Kit 05L907309AD Manual

€455.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2829006700

Mercedes W177 A200 M282.814 163HP Engine Control Unit ECU A2829006700 Automatic

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CV1T-14B531-AG

Ford Fiesta MK7 Door Module Front Driver Side Control Unit CV1T-14B531-AG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P6907530M

VW Volkswagen Touareg 7P Gateway Module Control Unit ECU 7P6907530M

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7645837

BMW i3 I01 Electric Gearbox Gear Shifting Actuator Module Unit 7645837

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8H22-14D374-AD

Land Rover Discovery 3 L319 Air Module Sensor Control Unit 8H22-14D374-AD

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8510832

BMW E90 E91 LCI N47N 318d 143HP Engine Control Unit ECU DDE 8510832 Automatic

€151.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9290358

Navigation Head Unit BMW F10 F11 F31 Harman Sat Nav Unit 9290358

€365.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0959595A

Audi A3 8V Door Control Unit Rear Left Right N/O/S 5Q0959595A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0971036B

Audi A5 8T S5 8F S5 8T Door Wire Cable Harness Loom Front Passenger 8T0971036B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971035C

Audi A4 B8 Door Wiring Harness Cable Loom Front Driver's Side 8K0971035C

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5B5FF36

BMW F70 F74 G60 X1 U11 Front Windscreen Camera Control Unit Module 5B5FF36

€313.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2219001201

Mercedes W221 Door Control Module Unit Rear Left Right N/O/S A2219001201

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8711311

BMW G20 LCI Positive Plus Battery Wiring Cable Loom 8711311

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8578945-6

BMW F20 F21 F30 116d 316d N47N 116HP Engine Control ECU Kit DDE 8578945 Manual

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1178200661-1

Mercedes C117 Front Headlight Light Lamp Harness Cable Right O/S A1178200661

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9290804

BMW F20 F22 F30 F32 Module ECU Control Unit FEM Fuse Box 9290804

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6977427

BMW E87 E90 E91 Mini Cooper R50 R52 R53 Air Module Control Unit ECU 6977427

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9389262

Mini F55 Rear Door Wiring Loom Harness Cable Left Right N/O/S 9389262

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06K907425J-6

Volkswagen Golf Mk8 2.0 TSI CJXC 300HP 4x4 Engine Control ECU 06K907425J Manual

€165.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3AC971557E

VW Volkswagen Passat B7 Door Wiring Loom Harness Front Right O/S 3AC971557E

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K2907115L-2

Audi A4 B8 A5 8T 8K 2.0 TFSI CDNC 211HP Engine Control ECU Kit 8K2907115L Manual

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9436256

BMW G20 G21 Front Passenger Door Cable Harness Wiring Control Unit 9436256

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1636880035-1

Mercedes-Benz M-Class ML W163 1 Fuse Box Relay Lid Cover Trim A1636880035

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CC1T-11000-AB

Ford Transit Engine Starter Motor Actuator Starter CC1T14000AB

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2479052503

Mercedes Sprinter W910 Remote Key Control Unit A2479052503

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8H0919889A

Audi A4 B7 Convertible Aerial Antenna Amplifier Control Unit Module 8H0919889A

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L907309AE-3

Volkswagen Passat CC 2.0 TDI CFGC 177HP Engine ECU Kit 03L907309AE Automatic

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 02E911023T

Seat Leon 5F Engine Starter Motor 2.0 TDI Diesel 02E911023T

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2215408908

Mercedes W221 Door Harness Wiring Loom Rear Right O/S A2215408908

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2115405645

Mercedes W211 Central Gateway Module Control Unit A2115405645

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2769007500

Mercedes W205 C43 4MATIC M276.823 367HP Engine Control ECU A2769007500 Automatic

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2034400033

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. 5Q0959592F

Door Module Audi A3 8V Volkswagen Golf 7 Control ECU Front Left N/S 5Q0959592F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7622995

Cable Alternator Starter BMW F20 F21 F30 F31 N55 Battery Wiring Harness 7622995

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04E907309AB

Audi A3 8V 1.4 TFSI CZEA 150HP Engine Control Unit ECU Kit 04E907309AB Manual

€222.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2661536679-2

Mercedes W169 A170 M166.940 116HP Engine Unit Module ECU A2661536679 Automatic

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BS7T-14K131-DA

Land Rover Discovery Sport L550 Evoque L538 Fuse Relay Box BS7T-14K131-DA

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0005456786

Mercedes W205 W213 Fuse Box Protective Bracket Cover A0005456786

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. Q0003188V008000000

Smart Fortwo C450 Engine Starter Motor Actuator A0051512601 0003188V008

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420919275-1

Rear Bumper PDC Audi A5 Sensor Parking Distance Control 420919275 1706091849

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9383069

Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav High Control Module 9383069

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8P0959655C

Audi A3 8P Air Module ECU Sensor Control Unit 8P0959655C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 415047

Mini Cooper One R55 R56 R57 Cable Adapter iPod Connection 0415047

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6401500734

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine Module ECU A6401500734

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6519007500-27

Mercedes SLK R172 250CDI OM651.980 Engine Control ECU Kit A6519007500 Automatic

€313.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8S0971230AC

Audi TTS FV Alternator Wire Wiring Cable Loom Harness 8S0971230AC

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0971030AG

Audi S5 8T RS5 Door Wire Wiring Cable Loom Harness Front Passenger 8T0971030AG

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G8971035AS

Audi A7 4G Front Door Harness Wiring Loom Cable Driver's Side 4G8971035AS

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V4971036BB

Audi A3 8V Sportback Front Passenger's Door Loom Wiring Harness 8V4971036BB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5WA907727P

Skoda Octavia IV Climate Air Conditioning Control Module Unit 5WA907727P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L907309G-2

Volkswagen Scirocco Mk3 2.0 TDI CUUB 110HP Engine ECU Kit 04L907309G BCM Key

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8779030

BMW G30 G31 Body Control Comfort Module Unit FEM ECU V05 8779030

€569.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AV6T14A067BC

Ford Transit Connect Mk2 II Fuse Box Battery Terminal Unit Module AV6T14A067BC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1H5951253

Volkswagen Touareg 7L Relay Alternator Alarm Black 4 Pin 12V No 143 1H5951253

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. L1TT14B006AA

Ford Transit Mk8 Fiesta Mk8 Crash Impact Sensor Air Module L1TT-14B006-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DS71-12B684-UE

Ford Mondeo Mk5 Engine Control Module ECU 150HP 2.0 Diesel DS71-12B684-UE

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3420482

BMW X3 E83 Ground Earth Cable Battery Wiring 3420482

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1665402950

Mercedes W166 Prefuse Box F32/4 Power Distribution Box A1665402950

€132.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2095404010

Mercedes A209 Front Door Cable Wiring Loom Harness Left N/S A2095404010

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2533402600

Mercedes X253 Hybrid GLC Battery Electrical Wiring Harness A2533402600

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KPLA-14M726-FA

Range Rover Sport L494 Hybrid 48V Fuse Junction Box Unit KPLA-14M726-FA

€104.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0131549002

Alternator Generator Mercedes W204 W211 OM646 Diesel Bosch 180A A0131549002

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7296108

BMW 4 Series F32 F82 M4 Rear Third Stoplamp Stop Lamp Brake Light White 7296108

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3S7T-18C830-AD

Ford Galaxy S-Max Mondeo Mk4 CD Changer Player Unit 3S7T-18C830-AD

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018JJ-1

Audi A5 8T CGLC 2.0 TDI 177HP Engine ECU Kit 03L906018JJ Automatic

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2208216279

Mercedes-Benz S-Class W220 Door Control Module Left Rear N/S A2208216279

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9897879-6

Mini F55 F56 F60 B38C One 102HP Engine Module ECU DME 9897879 Manual

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AB39-14A584-ALK

Ford Ranger Mk6 Front Door Wiring Loom Harness Cable Right O/S AB39-14A584-ALK

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1729007103

Mercedes R172 SLK Roof Control Module ECU A1729007103

€213.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7627021

BMW 1 3 Series F20 F21 F30 Petrol N13 Harness Engine Sensors Module 1 7627021

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G6035577H

VW Volkswagen Golf GTI MK7 Roof Aerial Amplifier Sender FM2 Left N/S 5G6035577H

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5QF959655L

Seat Ibiza Mk5 Air Module Control Unit ECU 5QF959655L

€85.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A9079003303

Mercedes W907 Front Radar Distance Control Unit Module A9079003303

€132.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6789514

BMW X6 E71 ICM Integrated Chassis Management Control Unit Brakes 6789514

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2038700326

Mercedes CLC CL203 Front Left N/S Door Control Module Unit A2038700126

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9153418

BMW F10 F11 B Plus Distributor Front Battery Cable 9153418

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. C1BT-14B560-BCF

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR072285

Land Rover Discovery Sport L550 Tailgate Opening Sensor Lower FK72-14E110-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7640004-10

Mini One R55 R56 Petrol N12 1.4 95HP Engine ECU Kit DME 7640004 CAS3 Key Manual

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7254970

BMW E92 LCI Grille Trim Panel Chrome Frame Front Right O/S 7254970

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9288373

BMW X5 F15 Door Storage Pocket Compartment Fiber Optic Front Left N/S 9288373

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7422700

Smart Opener Module BMW F01 F07 F10 F30 Trunk Open Control Unit ECU 7422700

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V4971693H

Audi A3 8V Rear Door Wiring Harness Cable Left Right N/O/S 8V4971693H

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 83A035063B

Audi A1 GB Q3 F3 Multimedia Head Unit Display Control Module 83A035063B

€579.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0971250T

Volkswagen Golf Mk7 Seat Leon 5F Battery Wire Negative Earth Lead 5Q0971250T

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 81A971036H

Audi Q2 GA Door Wiring Loom Harness Front Passenger Side 81A971036H

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

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