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 Seat Skoda Volkswagen PDC Parking Sensor Control Unit Module 5QA919294J

€23.95

Free delivery: Sep 14 – 15

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Part no. 4H0959795E

Audi A8 4H Rear Door Module Control Unit Left Right N/O/S 4H0959795E

€23.95

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Part no. 8E0035111D

Audi TT 8J Radio Head Unit Navi CD DVD Player Changer 8E0035111D

€23.95

Free delivery: Sep 14 – 15

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Part no. 8H0035411D

Audi A3 8P Door Card Speaker Rear Left Right N/O/S Audio Speaker 8H0035411

€23.95

Free delivery: Sep 14 – 15

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Part no. 80B907468G

Audi A4 B9 A5 F5 Gateway Diagnostic Interface Control Module Unit ECU 80B907468G

€208.95

Free delivery: Sep 14 – 15

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Part no. 4F0959793R

Audi A6 C6 Door Module Front Driver's Side Control Unit ECU 4F0959793R

€23.95

Free delivery: Sep 14 – 15

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Part no. 80A907355G

Audi Q5 FY AdBlue Control Module ECU Unit 2.0 Diesel 80A907355G

€37.95

Free delivery: Sep 14 – 15

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Part no. 8T0959792H

Door Module Audi A5 8T A4 B8 Control Front Left N/S Unit 8T0959792H

€23.95

Free delivery: Sep 14 – 15

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Part no. 3C0919275S-CGR

Audi TT 8J PDC Parking Distance Sensor Control Condor Grey - Y7E 3C0919275S

€23.95

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Part no. 4F0959792T

Audi A6 C6 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

€23.95

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Part no. 8R0907468C

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468C

€23.95

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Part no. 8T0907468P

Audi S5 8T Gateway Control Unit Module ECU 8T0907468P

€23.95

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Part no. 8T0035785A

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035785A

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0937084DC

Audi A3 RS3 8V Body Control Module BCM Control Unit ECU Power Supply 5Q0937084DC

€47.95

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Part no. 5WA937615

Audi A3 S3 8Y Fuse Box Control Module Relay Box Electrical Unit 5WA937615

€23.95

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Part no. 8U0907468Q

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468Q

€23.95

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Part no. 8T0907468H

Audi A4 B8 Gateway Interface Control Module Unit ECU 8T0907468H

€23.95

Free delivery: Sep 14 – 15

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Part no. 8K0959792S

Audi A4 B8 Front Door Control Module Unit ECU Passenger Side 8K0959792S

€23.95

Free delivery: Sep 14 – 15

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Part no. 8K0959793H

Audi A4 B8 A5 8T Door Module Control Front Unit ECU 8K0959793H

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4K0906121D

Audi A4 B9 A5 F5 A6 C8 Fuel Pump Control Pump Unit Module ECU 4K0906121D

€70.95

Free delivery: Sep 14 – 15

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Part no. 8T0862335F-1

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 420919275

Audi A4 B8 A5 8T Rear Bumper PDC Sensor Parking Distance Control 420919275

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1J0906381B

Audi TT 8N Fuse Box Relay Control Unit Module 1J0906381B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8R0907468L

Audi A5 8F Gateway Control Unit Module ECU 8R0907468L

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W8035225D

Audi A5 F5 Radio Aerial Antenna Amplifier Left Upper N/S 8W8035225D

€32.95

Free delivery: Sep 14 – 15

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Part no. 4L0910289K

Audi Q7 4L Body Control Comfort Unit Module BCM Unit ECU 4L0907289K

€237.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8R0971228C

Audi Q5 8R Engine Starter Wiring Harness Loom Wire 2.0 TDI Diesel 8R0971228C

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0035223AP

Audi A4 S4 B8 Audio Amplifier Sound Booster Control Unit Module 8T0035223AP

€113.95

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Part no. 8W0959655F

Audi A4 B9 Air Module Crash Control Module Unit ECU 8W0959655F

€113.95

Free delivery: Sep 14 – 15

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Part no. 4H0919275-DGR

Audi TT 8J PDC Parking Distance Sensor Control Daytona Grey Pearl Z7S 4H0919275

€23.95

Free delivery: Sep 14 – 15

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Part no. 4M0907247A

Keyless Entry Amplifier Audi A4 B9 A5 F5 Control Box Module Antenna 4M0907247A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0971230HH

Audi S3 8V Starter Alternator Wiring Harness 5Q0971230HH

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8A0937530

Audi A6 C6 Fuse Relay Box Module Unit Holder Bracket 8A0937530

€32.95

Free delivery: Sep 14 – 15

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Part no. 4M1959592D

Audi A6 C8 A7 4K Door Module Control Unit Front Passenger Side 4M1959592D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5QS907338B

Audi A3 S3 8Y Headlight Head Light Lamp Range Control Unit Module ECU 5QS907338B

€94.95

Free delivery: Sep 14 – 15

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Part no. 8K9035225

Audi RS4 B8 Radio Aerial Antenna Amplifier AM/FM 8K9035225

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T2035652F

Audi A5 8T A4 B8 Sat Navi Stereo Radio Audio MMI Head Unit CD Player 8T2035652F

€99.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971693B

Audi A4 B8 Rear Door Card Harness Wiring Cable Loom Left Right N/O/S 8K0971693B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0959795G

Audi Q5 8R Rear Door Control Module Unit ECU Left Right N/O/S 8K0959795G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0959792D

AUDI S5 8T Door Control Module ECU Front Left N/S 8K0959792D

€32.95

Free delivery: Sep 14 – 15

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Part no. 4E0907280B

Audi A8 4E S8 D3 Power Supply Control Module Unit ECU 4E0907280B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03L903017E

Audi A4 B8 A5 8T Q5 8R Quattro Alternator Generator 2.0 TDI 03L903017

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8L0971035H

Audi A3 S3 8L Front Door Card Panel Wiring Harness Right O/S 8L0971035H

€23.95

Free delivery: Sep 14 – 15

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Part no. 8W0959593N

Audi A4 B9 Front Door Module Control Unit ECU Driver's Side 8W0959593N

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0959593B-1

VW Golf 5G Audi S3 A3 8V Door Module Control Unit Front Driver Side 5Q0959593B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 04L907309R

Audi A3 8V 2.0 TDI Quattro 184HP DGCA Engine ECU Unit 04L907309R Automatic

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8R0971693B

Audi Q5 8R Rear Door Card Wiring Loom Left Right N/O/S 8R0971693

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8H0959655G

Audi A4 B7 Air Module Control Unit ECU Impact Sensor 8H0959655G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0959793E

Audi A4 B8 Door Module Front Drive Side Control Unit ECU 8K0959793E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K0971349JQ

Audi A3 8P 1.2 TFSI CBZB Alternator Wiring Harness Cable Loom 1K0971349JQ

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4L0941329

Audi Q7 S LINE Headlight Power Control Unit Module 4L0941329

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0035456

Audi A7 4G Aerial Antenna Amplifier Control Unit Module 4H0035456

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0907468AF

Audi A8 D4 Central Diagnostic Getaway PKO Control Unit Module ECU 4H0907468AF

€66.95

Free delivery: Sep 14 – 15

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Part no. 03C903023S

Audi A1 8X 1.4 TSI CAXA Alternator 03C903023S

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H4907357B

Audi A8 D4 Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357B

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 0AM911023N

Audi A3 8V 1.4 TFSI Petrol Starter Motor Engine Actuator Unit 0AM911023N

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M1907468D

Audi A4 B9 Gateway Control Module Unit ECU 4M1907468D

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Part no. 06E971627N

Audi A4 B8 A6 C7 A7 C7 4G Fuel Injector Wiring Cable 3.0 TFSI 06E971627N

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0959593E

Audi A4 B9 Front Door Control Module Unit Driver's Side 8W0959593E

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8E0857925G

Audi A3 8P TT 8J A4 B7 Ipod Interface Multimedia Storage Compartment 8E0857925G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K0959654

Audi A3 8P Steering Wheel Position Angle Sensor Control Unit Module 1K0959654

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0959392B

Audi A3 S3 8V Door Control Module Front Passenger Side Left N/S 5Q0959392B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0907468M

Audi A5 8T Central Gateway Module ECU Control Unit Lear 8T0907468D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0959792G

Audi A8L 4H Front Door Control Module Left N/S Unit ECU 4H0959792G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7L0937401B

Audi Q7 4L Power Distribution Box Control Unit Plus Housing Cover 7L0937401B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M0907566B

Audi A4 B9 A5 S5 F5 Lane Change Assist Module Control Rear Right O/S 4M0907566B

€237.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 04L906021BQ

Audi A4 B8 Engine Control Unit Module ECU 2.0 TDI CNHC 163HP 04L906021BQ

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 059911024P

Audi A6 C7 A7 4G 2.0 TDI Starter Motor Diesel Engine Denso 059911024P

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0959793G

Audi A4 B8 Door Module Front Left N/S Control Unit ECU 8T0959793G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0971547

Audi A6 C6 Cable Wiring Loom Heater Matrix Air Conditioning Cable 4F0971547

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8H0951178

Audi A4 B7 Cabrio Alarm Signal Body Control Sensor Module Unit 8H0951178

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8E0959651A

Audi A4 B7 Front Crash Impact Air Module Sensor Unit Module 8E0959651A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0959795C

Audi A4 B8 Door Module Rear Left Right N/O/S Control Unit Module ECU 8K0959795C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P0971679K

Audi A3 S3 8P Dashboard Glove Box Wiring Loom Cable Harness 8P0971679K

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0971228H

Audi A4 B8 3.0 TDI Starter Alternator Wiring Loom Cable Harness 8K0971228H

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0907468F

Audi A5 8T Gateway Control Module Unit ECU 8T0907468F

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0959393B

Audi A3 8V Front Door Control Module Unit Right O/S 5Q0959393B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8S0963553D

Volkswagen Skoda Seat Audi Seat Pressure Sensor Front Passenger Side 8S0963553D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7N0941329

Audi A3 8V 30 TDI DGTE Ad Blue Reducer Dosage Control Module Unit ECU 7N0941329

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03L911024B

Audi A6 C7 2.0 TDI CGLC Diesel Starter Motor 03L911024B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4N0907064DD

Audi A6 C8 Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907064DD

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0915181

Audi A4 RS4 B8 Battery Terminal Negative Cable Loom Harness Wiring 8T0915181

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K2907115P-1

Audi A5 8T A4 B8 8K 2.0 TFSI CDNC 211HP Engine ECU Kit 8K2907115P Key + Ignition

€303.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4E0910110L

Audi A6 C6 6-Disc CD Changer Magazine Head Unit MMI 6946989

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 04L907309AB-6

Volkswagen Caddy 2K 2.0 TDI DFSD 102HP Engine Control ECU 04L907309AB Manual

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4L0959794B

Audi Q7 4L Door Control Module Electrical Unit ECU Rear Right O/S 4L0959794B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0959792E

Audi A6 C6 Front Passenger Side Door Left N/S Module Unit Control ECU 4F0959792E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0959593H

Audi A4 S4 B9 Front Door Control Module Unit Driver's Side 8W0959593H

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8U0907468AQ

Audi A1 8X Central Gateway Control Unit Module Relay ECU 8U0907468AQ

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8J0035456A

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F1971687S

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971687S

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0953549A

Audi S6 C6 Steering Column Wiper Switch Stalk Cruize Control 4F0953549A

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0907530AH

Audi A3 S3 RS3 8V Gateway Control Module GW MQB Mid Unit ECU 5Q0907530AH

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0907530Q

Gateway Control Module Audi A3 8V Volkswagen MK7 ECU Unit 5Q0907530Q

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P0035785-1

Audi A3 8P Multimedia Interface Unit Module Bracket Mount 8P0035785

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0907801E

AUDI A7 4G8 Electric Handbrake Control Module TRW 4H0907801E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W1959593

Audi Q5 FY Front Door Control Module Unit Right O/S Side 8W1959593

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P4945095E-3

Audi A3 8P Trunk Lid Tail Lamp Light Wiring Cable Rear Left N/S 8P4945095E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F1971035N

Audi A6 C6 Front Driver Side Door Wiring Harness Loom Cable 4F1971035L

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

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