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 A8L 4H Gateway Control Module Unit 4H0907468AC

€80.95

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Part no. 8P3035223B

Audi S3 8P Audio Sound System Amplifier Bose 290328

€32.95

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Part no. 8K0951253

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins 8K0951253

€23.95

Free delivery: Sep 14 – 15

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Part no. 3Q0906121B

Audi A3 8V 30 TDI DGTE Diesel Fuel Pump Module Control Unit ECU 3Q0906121B

€23.95

Free delivery: Sep 14 – 15

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Part no. 8E0907637B

Audi A6 C6 Yaw Module Rotation Rate Acceleration Sensor 8E0907637B

€23.95

Free delivery: Sep 14 – 15

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Part no. 4K0919390F

Audi A6 C8 Door Panel LED Module Light Unit Rear Right O/S 4K0919390F

€28.95

Free delivery: Sep 14 – 15

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Part no. 5Q0919283F

Parking Distance Audi A3 8V TT Mk3 Seat Leon MK3 Control Module 5Q0919283F

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0937084AE

Audi A3 8V Module BCM Body Control Unit Module ECU 5Q0937084AE

€28.95

Free delivery: Sep 14 – 15

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Part no. 4L0919283E

Audi Q7 4L PDC Parking Distance Sensor Control Module Unit ECU 4L0919283E

€108.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G2907401B

Audi A7 4G Engine Control ECU 3.0 TDI Quattro 321HP CVUA 4G2907401B Automatic

€199.95

Free delivery: Sep 14 – 15

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Part no. 4L0907468B

Audi Q7 4L Gateway Module Central Control Unit 4L0907468B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8J0035186M

Audi TT 8J Radio CD Player Professional Audio Concern Head Unit 8J0035186M

€47.95

Free delivery: Sep 14 – 15

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Part no. 8K0907637A

Audi A5 8T Acceleration Yaw Rate Sensor Module Control Unit ECU 8K0907637A

€23.95

Free delivery: Sep 14 – 15

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Part no. 3Q0907530AA

Audi Seat Skoda Volkswagen Gateway Control Unit Module ECU 3Q0907530AA

€23.95

Free delivery: Sep 14 – 15

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Part no. 4E0919887M

Sat Nav Audi S8 D3 A6 C6 DVD Drive Navigation Control Unit 4E0919887M

€23.95

Free delivery: Sep 14 – 15

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Part no. 4L0959792B

Audi Q7 4L Door Control Unit Module ECU Passenger Side 4L0959792B

€23.95

Free delivery: Sep 14 – 15

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Part no. 8R0971035AM

Audi Q5 8R Door Wiring Loom Harness Electrical Cable Driver's Side 8R0971035AM

€32.95

Free delivery: Sep 14 – 15

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Part no. 83A907428C

Audi RSQ3 F3 Reversing Camera Control Unit Module 83A907428C

€360.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P4971693T

Audi A3 8P Door Wiring Harness Loom Cables Rear Left Right N/O/S 8P4971693T

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G8959795G

Audi A6 C7 Rear Door Control Module Unit ECU Left Right N/O/S 4G8959795G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0962131

Antenna Control Module Audi Q3 RSQ3 F3 Line Keyless Entry 5Q0962131

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4K0971727

Audi A6 C8 Pressure Sensor Wiring Loom Harness Cable 4K0971727

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4L0907355B-1

Audi Q5 8R Adblue Metering Control Module Unit ECU 4L0907355B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8V4971030H

Audi S3 8V 5Dr Front Door Wiring Harness Loom Passenger Side 8V4971030H

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 06N907309A-1

Audi A4 B9 8W 35 TFSI DMSB 150 HP Engine ECU Kit Body + Key 06N907309A Automatic

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 02Z911023R

Audi A3 8P VW Golf 5k Starter Motor 1.4 TFSI CAXC Petrol 02Z911023R 0001142003

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971687S

Audi A4 B8 Door Wiring Harness Loom Rear Left N/S Cabling 8K0971687S

€32.95

Free delivery: Sep 14 – 15

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Part no. 059907309-2

Audi S5 F5 3.0 TDI DMKC 341 HP Engine Control Module Unit 059907309AC Automatic

€222.95

Free delivery: Sep 14 – 15

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Part no. 8K0959792R

Audi Q5 8R Door Module Control Unit Front Passenger Side 8K0959792R

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0971365

Audi A4 B8 Seat Occupancy Belt Alarm Wire Wiring Cable Loom Harness 8T0971365

€37.95

Free delivery: Sep 14 – 15

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Part no. 83F877041A

Audi Q3 F3 Mk2 Panoramic Sunroof Control Unit Module ECU 83F877041A

€42.95

Free delivery: Sep 14 – 15

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Part no. 4F0955557A

Audi A6 C6 Door Crash Impact Sensor Front Left Right N/O/S 4F0955557A

€23.95

Free delivery: Sep 14 – 15

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Part no. 8R0803123A

Audi Q5 8R Battery Hold Down Clamping Strip 8R0803123A

€23.95

Free delivery: Sep 14 – 15

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Part no. 059907309L-2

Audi S5 F5 Engine Control Unit 347HP 3.0 Diesel Electric Automatic 059907309L

€170.95

Free delivery: Sep 14 – 15

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Part no. 8K0971104

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0919283E

Parking Distance Audi A3 8V TT Mk3 Seat Leon MK3 Control Module 5Q0919283E

€23.95

Free delivery: Sep 14 – 15

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Part no. 4H0941824

Audi A6 C8 Fuse Box Relay Plug Socket Fuse Unit Holder Bracket 4H0941824

€23.95

Free delivery: Sep 14 – 15

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Part no. 4G0919129A

Audi A5 8T A6 C7 A7 4G A8 4H TV Tuner Digital Video Control Module 4G0919129A

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4L0035225AJ

Audi Q7 4L Radio Aerial Antenna Amplifier AM/FM 4L0035225AJ

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P0907530A

Audi A3 8P Gateway Module Control Unit Gateway Module ECU 8P0907530A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0907401H-1

Audi A8 D4 3.0 TDI Quattro CDTA 258HP Engine ECU Kit 4H0907401 BCM + Key + Lock

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0959794A

Audi A6 S6 Avant Quattro 4F Door Control Unit ECU Rear Right O/S 4F0959794A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G5971693C

Audi A6 C7 4G Door Card Harness Loom Cable Wiring Rear Left N/S 4G5971693C

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8J0971349S

Audi TT 8J Alternator Main Cable Wiring Harness Loom CBBB Manual 8J0971349S

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0937084BS

Audi TTS FV 8S BCM Body Control Module Unit 5Q0937084BS

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8Z0941824C

Audi A4 S4 8H A6 S6 4B Battery Terminal Fuse Box Power Control Unit 8Z0941824C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971228AA

Audi A4 A5 S5 8T 8K 3.0 TFSI Alternator Wiring Harness Loom Cable 8K0971228AA

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 83A947356J

Audi Q3 F3 LED Rear Door LED Lighting Module Control Unit Left N/S 83A947356J

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M0010006J

Audi Q7 4M Fuse Box Battery Terminal Cover Housing 4M0010006J

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0971035BA

Audi A5 8T Coupe Front Driver Side Door Wiring Harness Right O/S 8T0971035BA

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0907551-2

Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine Unit ECU Kit 8K0907551 Automatic

€303.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03L906023KQ

Audi A1 8X 1.6 TDI 105HP CAYC Engine Control ECU Kit BCM Key 03L906023KQ Manual

€132.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 079911021D

Audi Q7 4L Engine Starter Motor Actuator Starter 079911021D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8H0035225L

Audi A4 B7 Cabrio Aerial Antenna Amplifier Module Unit Right O/S 8H0035225L

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1J0941365B

Audi A3 8l TT TTS 8N Fusebox Fuse Relay Box Cover Lid Top End Cap 1J0941365B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8J0945095C-1

Audi TT 8J Rear Tail Lamp Light Wiring Harness Cable Plug Left N/S 8J0945095C

€108.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8H0035225J

Audi A4 B7 Cabrio Aerial Antenna Amplifier Module Unit Left N/S 8H0035225J

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 83A971085S

Audi Q3 F3 Front Bumper Wiring Harness Loom 83A971085S

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G5971035CA

Audi S6 C7 Door Wire Wiring Harness Loom Cable Front Driver Side 4G5971035CA

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 83A947356K

Audi Q3 F3 LED Rear Door LED Lighting Module Control Unit Right O/S 83A947356K

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5N0971235A

Audi A3 8P VW Golf MK6 Battery Negative Earth Cable Harness Wiring 5N0971235A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8V4971693B

Audi A3 RS3 8V Rear Door Wiring Loom Harness Left Right N/O/S 8V4971693B

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1J0937550AB

Audi A3 8L VW Golf Mk4 Battery Fuse Box Terminal Cover Panel 1J0937550AB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0947355M

Audi A4 B9 LED Module Light Unit Wiring Harness Right Rear O/S 8W0947355M

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M0959792M

Audi S5 F5 Door Control Module Unit Front Passenger Side 4M0959792M

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K0937517-1

Audi A3 RS3 8V Potential Power Distribution Junction Box Jump Point 1K0937517

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G8959793A

AUDI A7 4G8 Door Control Module Front Left N/S Driver Side 4G8959793A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0971250AB

Audi A3 S3 8V Negative Battery Terminal Earth Cable Lead Wiring 5Q0971250AB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0907064JF

Audi A4 B8 A5 8T Q5 8R Body Control Module BCM Unit ECU 8K0907064JF

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8R0971036E

Audi Q5 8R Front Door Wiring Harness Cable Loom Passenger Side 8R0971036E

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0919283K

Audi Q7 4L Parking Control Unit ECU PDC Park Assist Module Sensor 4F0919283K

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8U0971693D

Audi RSQ3 8U Door Wiring Harness Loom Rear Left Right N/O/S 8U0971693D

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4K0035063A

Audi A6 C8 Central Media Unit Head Unit Navigation Control MIB2+ HIGH 4K0035063A

€351.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0959595E

Audi A4 B9 Rear Door Control Module ECU Left Right N/O/S 8W0959595E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0035454A

Audi A4 B9 Front Centre Dashboard Tweeter Speaker 8W0035454A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8S0035020B

Audi TT 8S FV Audio Multimedia Radio CD Player MIB2 Head Unit 8S0035020B

€569.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 02E911024A

Audi A3 8V 2.0 TDI Engine Starter Motor Bosch 02E911024A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M0035454B

Audi A4 B9 Dashboard Loudspeakers Tweeter Speaker Front 4M0035454B

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4N0906093E

Audi Q3 F3 A8 4N 2.5 TFSI Petrol Control Fuel Pump Tank Pump Unit 4N0906093E

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03G906016LR

Audi A4 B7 Engine Control Unit ECU 140 HP KIT 2.0 Diesel Automatic 03G906016LR

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G8971035BG

Audi A7 4G Front Door Harness Wiring Loom Cable Driver Side 4G8971035BG

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 06M907309H-1

Audi RS5 F5 2.9 TFSI DECA Quattro 450HP Engine Unit ECU Kit 06M907309H Automatic

€788.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8U0614109B

Audi RS Q3 8U ABS Pump Modulator Control Unit 2.5 TFSI Petrol 8U0614109B

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4E0971845

Audi A8 D3 Rear Fuse Relay Box Plate Mounting Right O/S 4E0971845

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8X0971687D

Audi A1 8X Rear Door Harness Left Right N/O/S Wiring Loom Cable 8X0971687C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3Q0905861C

Audi A4 B9 A5 F5 Steering Column Lock Mechanism Control Unit 3Q0905861C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W8947356

Audi A5 F5 Front Door Card Panel LED Module Light Unit Wiring Harness 8W8947356

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G8971036D

Audi A7 4G Front Door Harness Wiring Loom Cable Passenger Side 4G8971036D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M1959593D

Audi A6 C8 Door Control Module Unit ECU Front Driver's Side 4M1959593D

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971679B

Audi A4 B8 Glove Box Passenger Air Module Switch Wiring Harness Cable 8K0971679B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0959655B

Audi A6 C6 Air Module Control Unit ECU Module 4F0959655B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0035223L

Audi A4 B8 A5 8T Audio Amplifier Sound Booster Control Unit Module 8T0035223L

€185.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4E0907440

Audi A8 D3 Vehicle Location Tracking Control Module Unit 4E0907440

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 04C903023M

Audi A3 8V A1 S1 8X VW Jetta A6 Golf 5G Golf R 5G Petrol Alternator 04C903023M

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8V3971035A

Audi A3 S3 8V 3D Door Wiring Harness Loom Cable Driver's Side 8V3971035A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8X0959792K

Audi Q3 8U Front Door Module Control Unit ECU Passenger Side 8X0959792H

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1J0915333A-1

Volkswagen Golf Mk4 Battery Holder Tray Base Console Bracket Support 1J0915333A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1J0971243B

Audi TT 8N Battery Negative - Earth Cable Wiring Harness Cable 1J0971243B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971104J

Audi A5 8T Rear Bumper PDC Sensor Parking Distance Control Wiring 8K0971104J

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

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