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 3 L319 Air Module Control Unit ECU NNW502434

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9068270005

Mercedes W639 W906 Voltage Stabilizer Control Unit Module A9068270005

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2044406135

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

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 1Z0035156M

Skoda Yeti 5L Multimedia Head Unit Bolero Radio CD MP3 Player 1Z0035156M

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055401516

Mercedes W205 Battery Cable Negative Lead Wiring Harness Control A2055401516

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0019820823

Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03E971815A

Volkswagen Polo 6R Cover Wiring Loom Guide Bracket Trim 03E971815A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7561834-22

BMW E87 E90 120i 320i N46 150HP Engine Control DME Module 7561834 Automatic

€284.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 9354226

BMW X5 F15 F20 F21 F23 F30 F31 Rain Light Solar Sensor Windscreen 9354226

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 7PP907279BT

Porsche Macan 92A Body Control Unit Module BCM 7PP907279BT

€455.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 5A4A9D6

BMW G20 Front Door Wiring Harness Cable Driver Side 5A4A9D6

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0148459-BRG

Mini Cooper One R50 Fuel Filler Cover Flap British Racing Green A67 0148459

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0035456C

Audi A4 B7 Telephone Aerial Antenna Signal Amplifier Module 8E0035456C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9159311

BMW 5 Series F10 F11 Mini R55 R56 R57 Door Sensor Airbag 9159311

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6946073

BMW E46 Battery Cable Positive Plus Lead Wire 6946073

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C0937125-1

VW Passat B6 Sharan 7N Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E907309AC-1

Audi A1 8X 1.4 TFSI CZCA 125HP Engine ECU Kit BCM Lock + Key 04E907309AC Manual

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LK62-12B684-KAA

Range Rover L494 Engine ECU Control 3.0 Diesel Hybrid Automatic LK62-12B684-KAA

€807.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669005417

Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971030CH

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

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009000346

Mercedes W177 Engine Alternator Generator M282 A0009000346

€251.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2389009000

Air Module Mercedes A205 A238 A217 SRS Protection Control Unit A2389009000

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8586573

BMW F20 F30 LCI Wiring Harness Engine Gearbox Module 120dX 320dX B47 8586573

€156.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2044405935

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

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 9436289

BMW G20 G21 Rear Door Wiring Loom Cable Control Unit Left Right N/O/S 8718245

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 5B93615

Mini F66 B48P 231HP Engine Control Unit DME Kit 5B93615 Automatic

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7802929

BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator VALEO 170A 7802929

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0971225

Audi Q7 4L 4.2 TDI Quattro Positive HV Battery Terminal Cable Harness 7L0971225

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 6798872-1

BMW F10 F11 F30 F31 Wheel Module Tire Pressure Control RDC 433MHZ Unit 6798872

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0951223

Audi A6 C7 Single Horn Alarm Siren High Tone Control Unit Module 4H0951223

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A0009000646

Mercedes C118 C167 W177 W247 Parktronic Parking Control Unit Module A0009000646

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2048701226

Mercedes S204 Door Module Rear Right O/S Control Unit ECU A2048701226

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7560377

Cable Alternator BMW E81 E82 E87 E88 E90 E91 LCI Starter B+ 7560377

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 6851242

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7634059

BMW F30 F31 F32 N20 Engine Gearbox Module Wiring Cable Loom Harness 7634059

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 9391253

BMW F10 F11 Wiring Cable Loom 9391253 9391252

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

€42.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8R0035223F

Audi A4 B8 A5 8T Stereo Radio Sound System Speaker Amp Amplifier 8R0035223F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7075947-1

BMW 5 7 Series E60 E61 E65 E66 Front Left Seat Angle Adjustment Drive 7075947

€24.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1679009521

Mercedes W177 Keyless Entry ECU Control Module Unit A1679009521

€37.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. A1679006613

Mercedes W177 Sliding Roof Module Sunroof Panoramic Control Unit A1679006613

€85.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 99761266100

Porsche Boxster Cayman 987 Rear Bumper PDC Parking Sensor Wiring 99761266100

€66.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A1665400141

Mercedes W166 Petrol Engine HV Battery Earth Ground Line Cable Wire A1665400141

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 6822094

Mini F54 F55 F56 F57 Radio Sat Nav DAB Basic Media Player Head Unit 6822094

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0015467435

Battery Cover Mercedes W906 Battery Positive Pole Cover Red A0015467435

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6399001001

Mercedes W639 PDC Parking Park Sensor Distance Control Module A9064460046

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907064FH

Audi A6 C7 BCM2 Comfort Body Control Module Electrical Unit ECU 4H0907064FH

€51.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 6808577

Mini F55 F56 BDC Body Domain Controller Control Unit Module 6808577

€142.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. A9065420044

Mercedes W906 Bracket Mount Fuse Distribution Box A9065420044

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8612576

BMW X1 F30 F31 LCI Starter Motor Engine 8612576

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9890599

BMW F90 M5 G11 G30 Air Module Crash Control Unit 9890599

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079971627R

Audi RS4 B8 RS5 8T Injector Wiring Loom Harness 4.2 V8 FSI Petrol 079971627R

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7619136

BMW E84 F25 F26 N20 Engine Sensor Module Wiring Cable Loom Harness 7619136

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A971392

Audi Q3 RSQ3 F3 Seat Belt Warning Wiring Harness Centre Left N/S 83A971392

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6949080

BMW E90 E91 E92 E93 Seat Cross Member Wiring Cable Channel Duct 6949080

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 954104H411

Hyundai H-1 Body Control Module Control Unit BCM ECU Module 95410-4H411

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2465407711

Mercedes W176 Door Harness Loom Cable Wiring Rear Left Right N/O/S A2465407711

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 9218697

BMW X6 E71 Central Woofer Bass Speaker Stereo Subwoofer N/S 9218697

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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