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 A8 D3 Engine Starter Motor 3.2 FSI Petrol 260HP BPK Quattro 06E911023E

€37.95

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Part no. 8V0837220D

Audi A3 S3 RS3 8V Remote Key Fob Opener Lock 3 Button 434 Mhz 8V0837220D

€32.95

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Part no. 4G0951177-1

Audi A6 C7 A7 4G Alarm Movement Detector Roof Headliner 4G0951177

€23.95

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Part no. 8V4971035J

Audi S3 8V Door Trim Wiring Wire Harness Cable Front Driver's Side 8V4971035J

€28.95

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Part no. 8K0971035BB

Audi A5 8T Front Driver Side Door Wiring Harness Cable 8K0971035BB

€23.95

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Part no. 8K0959793C

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793C

€23.95

Free delivery: Nov 12 – 13

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Part no. 82G971035B

Audi A1 GB Mk2 Door Wiring Loom Harness Cable Front Driver Side O/S 82G971035B

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F1971687AL

Audi A6 C6 Rear Left N/S Door Harness Cable Loom 4F1971687AL

€47.95

Free delivery: Nov 12 – 13

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Part no. 8T0862335B

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335B

€28.95

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Part no. 8X0971845C

Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

€28.95

Free delivery: Nov 12 – 13

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Part no. 8T0971036A

Audi A5 8T Front Door Wiring Harness Cable Left N/S Passenger Side 8T0971036A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8E0907559H-1

Audi A4 B7 3.2 FSI Quattro AUK 255HP Engine ECU Kit 8E0907559H Manual

€474.95

Free delivery: Nov 12 – 13

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Part no. 4G8971693

Audi A7 4G Door Harness Loom Cable Wiring Rear Left Right N/O/S 4G8971693

€32.95

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Part no. 4H0907658C

Audi S3 8Y A5 F5 Q5 FY A8L 4H Air Quality Sensor Unit 4H0907658C

€23.95

Free delivery: Nov 12 – 13

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Part no. 1S0919275D-DGR1

Audi Volkswagen PDC Parking Distance Control Sensor SET Daytona Grey Pearl Z7S

€47.95

Free delivery: Nov 12 – 13

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Part no. 4H0907401-3

Audi S4 B8 3.0 TFSI CGWC 333HP Engine ECU Kit 4H0907401 Ignition + 2 Keys + Lock

€474.95

Free delivery: Nov 12 – 13

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Part no. 8K1907401K-1

Audi A5 8T Engine Control ECU 2.7 TDI Diesel 190HP CGKA Automatic 8K1907401K Kit

€256.95

Free delivery: Nov 12 – 13

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Part no. 8F0959655D

Audi A5 8F Air Module Control Unit ECU Crash Control 8F0959655D

€23.95

Free delivery: Nov 12 – 13

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Part no. 4K0035063D

Audi A6 C8 MIB2 Multimedia Navigation Radio Control Head Unit 4K0035063D

€664.95

Free delivery: Nov 12 – 13

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Part no. 8K0915429C

Audi A6 C7 Battery Positive Terminal Cover 8K0915429C

€23.95

Free delivery: Nov 12 – 13

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Part no. 8Y4971104BK

Audi S3 8Y Rear Bumper Wiring Harness Cable Loom 8Y4971104BK

€70.95

Free delivery: Nov 12 – 13

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Part no. 5Q0971081A

Audi A3 8V Windscreen Washer Wiring Loom Harness Cable Unit 5Q0971081A

€23.95

Free delivery: Nov 12 – 13

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Part no. 02E911024M

Audi A3 8V 2.0 TFSI DJHA Starter Motor 12V 02E911024M

€23.95

Free delivery: Nov 12 – 13

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Part no. 8J0907115-2

Audi TT 8J 2.0 TFSI BWA 200HP Engine Control Unit ECU Manual 8J0907115 Kit

€218.95

Free delivery: Nov 12 – 13

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Part no. 4K8971035BH

Audi A6 C8 Door Wiring Harness Cable Loom Front Driver's Side 4K8971035BH

€28.95

Free delivery: Nov 12 – 13

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Part no. 8U0971035AK

Audi Q3 8U Door Loom Wiring Harness Cable Front Driver's Side 8U0971035AK

€28.95

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Part no. 8W0035305

Audi S4 B9 S5 8F Sound Actuator Engine Sound Booster Generator 8W0035305

€332.95

Free delivery: Nov 10 – 13

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Part no. 8J0907115N-2

Audi TT 8J 2.0 TFSI BWA 200HP Engine Control Unit ECU Kit 8J0907115N Manual

€165.95

Free delivery: Nov 12 – 13

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Part no. 8E0971845AC

Audi A4 B7 Seat Exeo Engine Wiring Loom Plug Plastic Holder Bracket 8E0971845AC

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F0971845A-2

Audi A6 C6 Comfort Body Module Fuse Relay Box Control Unit 4F0971845A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8V0035034E

Audi A3 S3 8V RS3 Infotainment Control Unit MIB High Dash Panel 8V0035034C

€569.95

Free delivery: Nov 12 – 13

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Part no. 4G8907368

Audi A7 4G Body Convinience Module Control Unit Bracket Mount Holder 4G8907368

€23.95

Free delivery: Nov 12 – 13

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Part no. 8T8035225C

Audi A5 8T Audio Radio Aerial Amplifier Control Unit 8T8035225C

€23.95

Free delivery: Nov 12 – 13

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Part no. 8E0910115K-1

Audi A4 B7 Engine Control ECU 2.0 TFSI BWE 200HP Manual 8E0910115K

€142.95

Free delivery: Nov 12 – 13

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Part no. 03L906023PT

Audi A3 8P 1.6 TDI 105HP CAYC Diesel Engine Control Unit ECU Module 03L906023PT

€47.95

Free delivery: Nov 12 – 13

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Part no. 4M0971727S

Audi Q7 4M Fuel Tank Pump Wiring Loom Harness Cable Pump Plug 4M0971727S

€28.95

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Part no. 4RD965453

Audi S3 8V Multi Use Relay 5 Pin Black 4RD965453

€23.95

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Part no. 4K9035225P

Audi A6 C8 A7 4K Rear Antenna Aerial Amplifier AMP 4K9035225P

€23.95

Free delivery: Nov 12 – 13

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Part no. 03L906018KD-1

Audi A4 B8 All Road 2.0 TDI CGLC 177HP Quattro Engine ECU Kit 03L906018KD Manual

€237.95

Free delivery: Nov 12 – 13

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Part no. 8F0959655

Audi A5 S5 8F Air Module Control Unit ECU Crash Control Crash Data 8F0959655

€23.95

Free delivery: Nov 12 – 13

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Part no. 03C906016FR-1

Audi A1 8X 1.4 TFSI CAXA 122HP Engine Control ECU Kit 03C906016FR Manual

€132.95

Free delivery: Nov 12 – 13

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Part no. 1EA907376B

Audi A3 S3 8Y Rear Suspension Damper Module Control Unit ECU 1EA907376B

€56.95

Free delivery: Nov 12 – 13

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Part no. 1K0915333

Audi A3 8P Battery Box Tray Housing Holder Bracket Cover Mount 1K0915333

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0971516A

Audi A8 D4 Steering Column Adjustment Wiring Harness Loom Cable 4H0971516A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8K0971228AH-1

Audi A5 8T Positive Battery Lead Terminal Wiring Cable 2.0 TFSI 8K0971228AH

€66.95

Free delivery: Nov 12 – 13

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Part no. 5N0971250

Audi A3 8P HV Battery Negative Earth Cable Harness Wiring Terminal 5N0971250

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8D0951253

Audi Q7 4L Relay Unit Module 4 Pins 8D0951253

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M0959792N

Audi A5 F5 Door Module Control Unit Module ECU Front Passenger Side 4M0959792N

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0862335D

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335D

€23.95

Free delivery: Nov 12 – 13

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Part no. 3C5035534F

Audi A3 8P Cabrio Antenna Amplifier Aerial Module Control Unit 3C5035534F

€23.95

Free delivery: Nov 12 – 13

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Part no. 1K0937124H

Audi A3 8P VW Golf Mk4 Fuse Box Engine Compartment Relay Unit 1K0937124H

€23.95

Free delivery: Nov 12 – 13

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Part no. 06M907309D-1

Audi SQ5 FY 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit Gateway + Key 06M907309D

€617.95

Free delivery: Nov 12 – 13

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Part no. 4H0907064GN

Audi A6 C7 A7 4G Body Comfort Control Module Unit BCM 4H0907064GN

€28.95

Free delivery: Nov 12 – 13

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Part no. 4F0867749A

Audi A6 C6 Battery Hold Down Strap Support Securing Holder Belt 4F0867749A

€23.95

Free delivery: Nov 12 – 13

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Part no. 3Q0959435D

Audi TT FV Mk3 8S Keyless Module Control Unit Comfort Access 3Q0959435D

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G0951177-2

Audi A6 C7 A7 4G Roof Headliner Reading Lamp Inner Light Panel Grey 4G0951177

€23.95

Free delivery: Nov 12 – 13

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Part no. 8W0971035BA

Audi A4 S4 RS4 8W A4 B9 Door Wire Harness Front Passenger Side 8W0971035BA

€23.95

Free delivery: Nov 12 – 13

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Part no. 8T0959792Q

Audi A5 8T Front Door Control Module Passenger Side 8T0959792Q

€23.95

Free delivery: Nov 12 – 13

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Part no. 04L906021FR

Audi A6 C7 Engine Control Module ECU 2.0 Diesel 190HP CNHA Automatic 04L906021FR

€70.95

Free delivery: Nov 12 – 13

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Part no. 03G906016DT-1

Audi A3 8P 2.0 TDI BKD 140HP Diesel Engine Control ECU Kit 03G906016DT Automatic

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E971627H

Audi A5 8T Injector Wiring Harness Cable Cylinders 1-3 3.2 FSI 07L971627F

€23.95

Free delivery: Nov 12 – 13

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Part no. 8J0971085D-1

Audi TT 8J Parking Sensor Wiring Harness Cable PDC Rear Bumper 8J0971085D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K5945095AC-1

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S 8K5945095AC

€23.95

Free delivery: Nov 12 – 13

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Part no. 4L0937555A

Audi Q7 4L Fuse Relay Box Housing Trim Panel Lid Cover 4L0937555A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8S0907468D

Audi TT FV Mk3 8S Gateway Module Interface Data Bus Control Unit 8S0907468D

€42.95

Free delivery: Nov 12 – 13

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Part no. 8K0971029AQ

Audi A4 S4 B8 Door Wiring Harness Loom Cable Front Right O/S 8K0971029AQ

€56.95

Free delivery: Nov 12 – 13

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Part no. 5QS919298

Audi A3 S3 8Y VW Caddy SB Mk4 Parking Sensor Module Control Unit 5QS919298

€161.95

Free delivery: Nov 12 – 13

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Part no. 8K5945096AC-1

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Right O/S 8K5945096AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E907309AC-3

Audi A1 8X Engine ECU Kit Set 1.4 TFSI Petrol CZCA 125HP 04E907309AC Manual

€180.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971035A

Audi A4 B8 Front Driver Door Wiring Harness Loom Electrical Cable 8K0971035A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QF971227D

Audi RSQ3 F3 Battery Cable Plus Pole Positive Wiring Harness Loom 5QF971227D

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0959435G

VW Volkswagen Tiguan 5N Entry Keyless Kessy Control Module Unit ECU 3Q0959435G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H4907357G

Audi TT 8S Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357G

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0035225BQ

Audi A8 D3 Aerial Amplifier Antenna Receiver Signal Booster Unit 4E0035225BQ

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T2907560E

Audi RS4 B7 RS5 8T 4.2 FSI 450HP Engine Control Unit ECU 8T2907560E Automatic

€374.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0971365

Audi A1 8X Driver's Seat Cable Seat Belt Warning Wiring Loom Harness 8X0971365

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971227A-1

Audi A4 S4 8W A5 S5 F5 Battery Wiring Harness Cable Loom Distributor 8W0971227A

€66.95

Free delivery: Nov 12 – 13

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Part no. 8R0035474D

Audi Q5 8R AUX Interface Connector Wiring Cable Adapter 8R0035474D

€23.95

Free delivery: Nov 12 – 13

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Part no. 02M911024P

Audi A3 8P 2.0 TDI CBBB Diesel Starter Motor 02M911024P

€32.95

Free delivery: Nov 12 – 13

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Part no. 3C0909141

Audi S1 8X Skoda Octavia Mk3 Keyless Entry Antenna Control Module 3C0909141

€23.95

Free delivery: Nov 12 – 13

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Part no. 8R0907468A

Audi A4 B8 Quattro A5 8T Gateway Control Unit Module 8R0907468A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8F0971035F

Audi S5 A5 8F Front Door Trim Wiring Harness Cable Loom Left N/S 8F0971035F

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971365L

Audi A7 4G Front Seat Belt Warning Wiring Cable Left Right N/O/S 4G8971365L

€32.95

Free delivery: Nov 12 – 13

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Part no. 8K9035225A

Antenna Amplifier Audi A4 S4 B8 Radio Aerial AM/FM 8K9035225A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971030

Audi Q3 8U Front Door Wiring Harness Wire Loom Cable Right O/S 8U0971030

€23.95

Free delivery: Nov 12 – 13

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Part no. 420035225S

Audi R8 42 Spyder Gen 1 Audio Antenna Amplifier Module Unit 420035225

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0937503

Audi Q3 8U Skoda Yeti VW Caddy Mk2 Tiguan 7L Fuse Relay Box Housing 7N0937503

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0945093N-2

Audi Q3 8U Facelift Rear Tail Light Lamp Left N/S Cable Harness Wire 8U0945093N

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971277

Audi A4 B9 S4 8W A5 S5 F5 Front Motor Grille Shutter Wiring Cable Loom 8W0971277

€47.95

Free delivery: Nov 12 – 13

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Part no. 8V4945093C-2

Audi S3 8V Rear Lamp Light Tailgate Inner Left N/S Harness Loom Wire 8V4945093C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0907064DQ

Audi Q5 8R Body Comfort Control Module BCM 8K0907064DQ

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8971029AM

Audi A5 8T Front Door Wiring Loom Harness Cable Driver's Side 8T8971029AM

€28.95

Free delivery: Nov 12 – 13

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Part no. 8K0971030AQ

Audi A4 B8 Front Door Wiring Harness Loom Cabling Passenger Side 8K0971030AQ

€28.95

Free delivery: Nov 12 – 13

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Part no. 4M8907777CA

Audi Q7 4M Air Suspension Adjustment Module Control Unit ECU 4M8907777CA

€265.95

Free delivery: Nov 12 – 13

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Part no. 04C907309BB

Audi A1 GB Engine Control Unit ECU 1.0 Petrol 115 HP Manual Gearbox 04C907309BB

€42.95

Free delivery: Nov 12 – 13

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Part no. 8P0862335N

Audi A3 8P TT 8J Interface Bluetooth Control Module Harman Becker ECU 8P0862335N

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0971085E

Audi A6 C6 Rear Bumper Parking Sensor Wiring Loom Harness 4F0971085E

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G5971687BQ

Audi A6 C7 4G Rear Door Harness Wiring Loom Cable Left N/S 4G5971687BQ

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G5971030EG

Audi A6 C7 Door Wiring Harness Front Passenger Side 4G5971030EG

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

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