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

€161.95

Free delivery: Nov 12 – 13

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Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

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Air Module Mercedes A205 A238 A217 SRS Protection Control Unit A2389009000

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

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

€156.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. A2709000900-10

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

€379.95

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 9436289

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

€32.95

Free delivery: Nov 12 – 13

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Part no. 1K2971615A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5B93615

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

€284.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. 070906016B

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

€85.95

Free delivery: Nov 12 – 13

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Part no. 4M5T-18C815-BK

Ford Focus St-2 Mk2 Sony MP3 CD Player Radio Head Unit 4M5T-18C815-BK

€56.95

Free delivery: Nov 12 – 13

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Part no. 5A7E4D1

BMW F40 F44 Gran Coupé G20 Front Windscreen KaFas Camera 5A7E4D1

€47.95

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Part no. 038907281D-1

Genuine VW Audi Seat Skoda Diesel Glow Plug Relay Unit Black 038907281D

€23.95

Free delivery: Nov 12 – 13

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Part no. 6798872-1

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

€23.95

Free delivery: Nov 12 – 13

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Mercedes CL S Class C215 W220 Fuse Box Unit Cover Front Left A2205400282

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. CK52-F260145-CC

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

€37.95

Free delivery: Nov 12 – 13

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Part no. HK72-18C847-CA

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7810002-3

BMW E82 Engine Control Unit ECU CAS 2.0 Diesel 204HP N47D20B Manual 7810002 KIT

€408.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009000646

Mercedes C118 C167 W177 W247 Parktronic Parking Control Unit Module A0009000646

€284.95

Free delivery: Nov 12 – 13

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Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W83-2C496-AC

Jaguar XF X250 Electronic Parking Brake Control Module ECU Unit 8W83-2C496-AC

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. 9287336-5

BMW F20 F21 F30 F31 Air Conditioning Control Panel Unit Automatic 9287336

€51.95

Free delivery: Nov 12 – 13

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Part no. A2048701226

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

€32.95

Free delivery: Nov 12 – 13

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Part no. 8F0972814

Audi A5 8F Cabriolet Hydraulic Roof Pump Motor Wiring Harness Loom 8F0972814

€47.95

Free delivery: Nov 12 – 13

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Range Rover L322 CD Player Changer Unit Module Radio Audio System XQE500202

€70.95

Free delivery: Nov 12 – 13

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Part no. LR105985

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

€61.95

Free delivery: Nov 12 – 13

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Part no. 4K5971687BA

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. 6868724

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

€332.95

Free delivery: Nov 12 – 13

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Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Nov 12 – 13

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Part no. 7560377

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 5A7A0B5

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

€146.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. 7634059

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

€32.95

Free delivery: Nov 12 – 13

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Part no. 6F0971199

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

€47.95

Free delivery: Nov 12 – 13

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Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Nov 12 – 13

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Part no. A4515400906

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 46356034

Vauxhall Movano C Lambda Oxygen Sensor 2.2 BlueHDI 46356034

€412.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9391253

BMW F10 F11 Wiring Cable Loom 9391253 9391252

€23.95

Free delivery: Nov 12 – 13

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Part no. HY32-14A597-BA

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 8621016-1

BMW G20 G30 Accumulator Battery Negative Ground Cable Wiring Plug 8621016

€23.95

Free delivery: Nov 12 – 13

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Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2215409107

Mercedes W221 Instrument Panel Illumination Wiring Harness Cable A2215409107

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1705451240

Mercedes R170 C215 W220 W463 Engine Control Module Holder Bracket A1705451240

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5A57FC3

BMW F20 F21 F22 F30 F32 M Sport Radio Remote Key Fob Control 434 Mhz 5A57FC3

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7075947-1

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BVJG101B

Range Rover Sport L494 Radio CD Player Sat Nav Head Unit CF6N-18C815-HF

€104.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. A1679006613

Mercedes W177 Sliding Roof Module Sunroof Panoramic Control Unit A1679006613

€70.95

Free delivery: Nov 12 – 13

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Part no. BJ32-14290-AGD

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 99761266100

Porsche Boxster Cayman 987 Rear Bumper PDC Parking Sensor Wiring 99761266100

€66.95

Free delivery: Nov 12 – 13

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Part no. CK52-14A073-CB

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1665400141

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LR076249

Land Rover DISCOVERY Sport L550 Knuckle Rear Wheel Hub RIght O/S LR076249

€146.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. A0015467435

Battery Cover Mercedes W906 Battery Positive Pole Cover Red A0015467435

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6399001001

Mercedes W639 PDC Parking Park Sensor Distance Control Module A9064460046

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0907064FH

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

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1Q0919283A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. XUC000262A

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6808577

Mini F55 F56 BDC Body Domain Controller Control Unit Module 6808577

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971035R

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

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9065420044

Mercedes W906 Bracket Mount Fuse Distribution Box A9065420044

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8612576

BMW X1 F30 F31 LCI Starter Motor Engine 8612576

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9890599

BMW F90 M5 G11 G30 Air Module Crash Control Unit 9890599

€142.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. A2055404003

Mercedes W205 Starter Alternator Wiring Harness Loom Cable OM651 A2055404003

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6962424

On Board Navigation BMW E60 E61 E90 E91 Display Monitor Screen 6,5" 6962424

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8714364

BMW F44 Gran Coupé Rear Door Wiring Loom Harness Right O/S Side 8714364

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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

€23.95

Free delivery: Nov 12 – 13

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BMW E39 F40 F44 F45 F46 F48 Mini F54 F55 Engine Harness Loom Cable Wire 8678972

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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BMW F20 F21 F30 Ultrasonic Parking Sensor PDC Front Havanna Metallic - A17

€23.95

Free delivery: Nov 12 – 13

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Part no. FW93-18K942-AB

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit FW93-18K942-AB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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Renault Espace Mk4 Radio Player Amplifier Head Unit Cd Player 8200205833

€23.95

Free delivery: Nov 12 – 13

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Part no. 03C906022AN-1

Audi A3 8P Engine ECU Module Key 1.4 TFSI 125HP Petrol CAXC Manual 03C906022AN

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6511508300

Engine Wiring Mercedes W910 OM651.958 Diesel Harness Loom Cable A6511508300

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AX23-14290-AMB

Jaguar XF X250 Fuse Relay Box Unit 3.0 Petrol AJ6WG Automatic AX23-14290-AMB

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2048701126

Mercedes S204 Door Module Rear Left N/S Control Unit ECU A2048701126

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8574380-1

BMW F10 520d N47N 184HP Engine Control Unit ECU DDE 8574380 Automatic

€165.95

Free delivery: Nov 12 – 13

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Part no. 8654466-1

BMW F45 225i 231HP B48 Engine ECU Kit Unit DME 8654466 BDC Key Automatic

€664.95

Free delivery: Nov 12 – 13

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Part no. 1870892

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

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2048207485

Mercedes W204 Front Door Control Unit Module Right O/S A2048207485

€23.95

Free delivery: Nov 12 – 13

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Part no. HPLA-7C078-BKD

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

€80.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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BMW E65 E66 Centre Console Front Armrest Tray Cables Wiring Set 6921309

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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