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 X2 F39 F40 F45 F45 LCI F46 F48 Steering Control Module SAS Unit ECU 9500079

£127.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8Y0947355P

Audi S3 8Y Glow Box Light Control Unit LED Module 8Y0947355P

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F0919813E

Audi A4 B8 Chip Card Reader for Road Toll ETC Japan Module Unit 4F0919813E

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2515452132

Mercedes W164 Air Suspension Module Regulation Control Unit A2515452132

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2208216279

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. E93 Wiring Loom Set PDC Rear-1

BMW 3 Series E93 Convertible Cabrio Wiring Loom Set PDC Rear Bumper Set

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2168204726

Mercedes W221 Bluetooth Control Module Mobile Phone Interface A2168204726

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. SRO000020

Range Rover L322 YAW Rate Speed ESP Sensor Module Bosh SRO000020

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8580061

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

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9187533-1

BMW E82 ECU Body Control Module Junction Box L1 PL2 JBBFE II 9187533

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9231178

BMW F22 F30 F80 M3 F32 Radio Antenna Amplifier AM FM 9231178

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215457832

Mercedes W221 Steering Column Wheel Angle Sensor Control Unit A2215457832

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5N0919673AB

Audi Q3 8U Diesel Fuel Tank Gauge Sender Control 5N0919673AB

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1679004712

Bluetooth Module Mercedes W205 W213 W222 W238 Control Unit ECU A1679004712

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8662849-1

Mini Cooper S F55 F56 B48 192HP Petrol Engine ECU Kit DME 8662849 + BDC + Key

£474.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9246831

BMW F10 Front Bumper PDC Wiring Parking Sensor Loom Harness 9246831

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9210120

BMW F07 GT Door Wiring Loom Cable Harness 9210120

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6832062

BMW F10 F13 X3 F25 Wireless Charger Centre Console Phone Charging Module 6832062

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. UB2305000334

Mercedes CLA C117 Head Unit Sat Nav Navigation Display Screen UB2305000334

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9175653-2

BMW E82 Xenon Footwell Light Control Module Unit PL2 FRM II Lear 9175653

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8663284

BMW F20 F30 F31 LCI B38 ECU Basic DME Control Unit Automatic Gearbox 8663284

£284.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2044405935

Mercedes W204 Door Card Harness Loom Cable Wiring Front Left N/S A2044405935

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959792A

Audi A5 8T Door Control Module Front Left N/S 8K0959792A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2K5937085

VW Volkswagen Caddy C20 Body Control Module BCM Comfort Control Unit 2K5937085

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3G0962243C

Volkswagen Seat Skoda Audi Tailgate Module Controller 3G0962243C

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0035421619

Mercedes W177 Relay 052 Engine Fuse Box Relay Slot B D E 70A Tyco A0035421619

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P7959655

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7387090

BMW F33 Neck Heater Warmer Control Module Unit ECU 7387090

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7809999

BMW X3 Series E83 LCI 2.0d N47 177HP Engine DDE ECU Control Unit 7809999 Manual

£151.95

Free delivery: Aug 27

If paid before 14:00

Part no. 521839170

Citroen Relay III Parking Sensor Control Module Unit 521839170

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574095-6

BMW F20 F30 116d 316d N47N 116HP Engine ECU Kit DDE 8574095 Key FEM Automatic

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6429060900

Mercedes W204 W207 W212 W221 Starter Motor A6429060900

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 46857478

Citroen Relay III Negative Battery Cable Wiring Lead 46857478

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055456240

Mercedes C205 Rear Control Unit Module Bracket Mount Holder Support A2055456240

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3AA959433E

VW Volkswagen Passat B7 Convenience Body Control Module Unit ECU 3AA959433E

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115405310

Mercedes W211 Wiring Rear Trunk SAM/SRB Control Module Feed Cable A2115405310

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9252156

BMW F12 Convertible Folding Top Roof ECU Module Control Unit CVM 9252156

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 03G906016HS-1

Audi A6 C6 2.0 TDI BRE 140HP Engine Control Module ECU Set 03G906016HS Manual

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6822586-1

DAB Bluetooth BMW F10 LCI F20 F21 F30 F31 Head Control Unit Module Basic 6822586

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0959793B

Audi A1 8X Door Module Control Unit Controller Front Driver's Side 8X0959793B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9321016-1

BMW F10 F11 LCI On-Board Screen Central Information Display 10,25" 9321016

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A94F69

BMW G20 Air Conditioning Air Con A/C Control Unit Module 5A94F69

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9224177-1

BMW F10 F11 F12 F13 F15 F16 Air Module Crash Sensor 9224177

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9231283-DSB1

BMW X5 E70 F10 PDC Parking Sensor Ultrasonic SET X2 Tiefseeblau - A76 A899231283

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7811701-4

BMW E87 LCI E90 118d 318d Diesel N47 Diesel ECU KIT DDE 7811701 + CAS3 + Key

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2519005200

Mercedes R350 V251 Head Unit Radio Player Navigation Media Bluetooth A2519005200

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9364729

Mini F55 F56 F57 Battery Cable Positive Wire Lead Cable Terminal 9364729

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8380409

BMW X5 E53 Fuse Distribution Box Relay Board 6907395 8380409 6909721

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9301309

Air Conditioning Unit BMW F20 F21 F30 F31 Control Unit A/C Module 9301309

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7811700-12

BMW E60 E61 LCI E90 320d 520d N47 177HP ECU KIT DDE 7811700 CAS3 + Key Manual

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9315151

BMW X3 F25 Fuse Box Power Distribution Control Unit Box Rear 9315151

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-4K2423053D-1

Audi A6 C8 Steering Rack Control Unit Module 4NO909144E

£294.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959792B

Audi A4 B8 Door Module Control Unit ECU Front Passenger Side 8K0959793B

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2479000910

Mercedes W177 W247 All Wheel Drive Control Unit Module ECU SG MFA2 A2479000910

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P3035223B

Audi S3 8P Audio Sound System Amplifier Bose 290328

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9226347

BMW E81 E90 LCI Business System Car Infotaiment Computer CIC 9226347

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. GJ32-14F041-AB

Range Rover Evoque L538 Fuse Box Control Unit Module GJ32-14F041-AB

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9133913

BMW Z4 E89 Roadster Convertible HiFi Speaker System Amplifier 9133913

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6963014

BMW E60 E61 E63 Passenger Side Door Air Module Control Unit ECU 6963014

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 059903015T

Audi Q7 4L A8 D4 Water Cooled Alternator 190A 059903015T

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA035741B

Volkswagen Golf CD1 Antenna Amplifier Transmitter Receiver Module ECU 5WA035741B

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8598806-2

BMW X3 F25 20dX Diesel B47 190HP Engine Module ECU Kit DDE 8598806 Key CAS4

£360.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 7812500-2

BMW E60 E87 E90 LCI 120d 320d 520d N47 Engine ECU Kit DDE 7812500 CAS3 + Key

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9177118

CD Changer BMW X5 E70 X6 E71 Mini R55 R56 R57 6 Disc Changer Unit 9177118

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8663284-2

BMW F20 LCI 118i F30 LCI 318i B38 136HP ECU Kit DME 136HP 8663284 Key Lock FEM

£427.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5JA919604A

Skoda Rapid NH1 Dashboard Radio Multifunction Media Display Unit 5JA919604A

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9454245

Differential Locking Module BMW F90 M5 G20 Rear Axle Control Unit ECU 9454245

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9458738

BMW X2 F39 Camera Kafas Windscreen Front Parking Camera Module Unit 9458738

£80.95

Free delivery: Aug 27

If paid before 14:00

Part no. AH42-15K603-AA

Range Rover L405 Aerial Antenna Control Unit Keyless Entry AH42-15K603-AA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1649005201

Mercedes V251 SAM Unit Rear Control Module A1649005201

£360.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9377150

BMW 1 Series F20 Bluetooth Control Module Unit TCB ECE 9377150

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2124401251

Door Cable Mercedes W212 Wiring Loom Front Right O/S Driver Side A2124401251

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5F4035225B

Seat Leon Mk3 Antenna Amplifier Module FM Right O/S Aerial Booster 5F4035225B

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5N0971693A

Volkswagen Tiguan 5N Rear Door Harness Cable Wiring Left Right N/O/S 5N0971693A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8507899

BMW F31 N47N 320d Engine Wiring Harness Module Diesel 8507899 8507896

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0907063CG

Audi Q5 FY 2.0 TFSI DAXB Petrol Supply Body Control Module Unit 8W0907063CG

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A1695403505

Mercedes-Benz A-Class W169 Wiring Loom Cable Door Front Right O/S A1695400905

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8200589436

Mercedes W415 Citan Renault Kangoo Rear Left Door Reflector Light 8200589436

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7641003-6

Mini Cooper S R55 R56 N14 1.6 174HP ECU Kit DME 7641003 + CAS3 + Key Manual

£322.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-8516715

BMW F02 Engine Wiring Automatic Gearbox Harness Loom Cable 730Ld N57 8516715

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6851242

ICM Module BMW F01 F02 Integrated Chassis Management QL ES Control Unit 6851242

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. FK72-14301-AB

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA919275C-DGR

Audi S3 8Y PDC Parking Distance Sensor Daytona Grey Metallic - Z7S 5WA919275C

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6915047

BMW E46 E39 E38 E83 E53 E85 E86 Control Unit Voice Input System Module 6915047

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 04L907309L-1

Audi A5 F5 2.0 TDI DETA 190HP Engine Control Unit Module ECU 04L907309L Manual

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1728208710

Mercedes W176 W246 Roof Towing Alarm Sensor Switch Module A1728208710

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7641003-3

Mini Cooper S R55 R56 R57 N14 1.6 ECU Basic Control Unit DME 7641003 Manual

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9207361

Hands Free BMW E81 E87 LCI E90 Electronics Charging MULF2 9207361

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5N0971120G

VW Tiguan 5N Door Wiring Cable Harness Loom Front Driver's Side 5N0971120G

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9387228

Mini F56 Fuse Box Control Unit SAM Module Relay 9387228

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2044400638

Mercedes C204 Wiring Cable Harness Front Passenger Door Wiring Loom A2044400638

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118701085

Mercedes R171 Navigation Processor Multimedia Control Module Unit A2118701085

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9307421

Camera Control Unit BMW F20 F21 F30 F31 KaFAS 2 Camera Module ECU 9307421

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6920758

BMW 3 5 7 X5 Series E38 E39 E46 E53 GPS Navigation System Computer Unit 6920758

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7557809-10

BMW E87 E90 N45 116i 316i Petrol ECU Kit DME 7557809 + CAS 3 + Key Manual

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 5N1971121G

Volkswagen Tiguan 5N Door Wiring Front Passenger Side Cable Harness 5N1971121G

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. C1BT-19C175-AB

Ford Fiesta Mk7 GPS Sensor Antenna Module C1BT-19C175-AB

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-8736361

Head Up Display BMW F32 F33 F36 Dashboard Car System Screen 8736361

£75.95

Free delivery: Aug 27

If paid before 14:00

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