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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Mercedes-Benz C-Class W203 Alarm Sensor Module Unit A2038219751

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8200587119

Renault Trafic III Vauxhall Vivaro B Relay 5-Pin Grey Unit 8200587119

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7540369

BMW E46 N46 Wiring Harness Engine Gearbox Module Loom Cable 7540369

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6461509372-2

Mercedes W204 C220CDI 170HP OM646.811 Engine ECU Kit Key Lock A6461509372

€265.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8585731

Engine Wiring BMW F30 F31 F36 N47N xDrive Automatic Gearbox Loom Harness 8585731

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0959793AC

Porsche Macan S 95B-2 Front Door Control Module Unit Driver's Side 4H0959793AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G0035061J

Audi A7 4G A4 B8 A6 C7 Q5 8R Sat Navi Stereo Radio Audio Unit Player 4G0035061J

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2215401101

Mercedes W221 Fuse Box Control Unit SAM Module Relay Controller A2215401101

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420971235

Audi R8 42 Battery Minus Negative Wiring Loom Harness Cable 420971235

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2056186100

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186100

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7634056

Engine Wiring BMW F20 F21 F30 F31 N20 Cable Loom Harness 7634056

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2135402870

Ground Cable Mercedes C238 Fuse Box Wire Prefuse Box Wiring A2135402870

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DH52-14240-BAC

Land Rover L359 Door Wiring Loom Harness Cable Rear Left N/S DH52-14240-BAC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2218101817-1

Mercedes W221 Headlining Interior Mirror Rear Left Right N/O/S A2218101817

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9231174

BMW 3 4 F30 F32 Touring Amplifier Rear Window Antenna Diversity 9231174

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4N0907063NG

Audi A6 C7 Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907063NG

€232.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1669005605

Door Module Mercedes W176 W246 Front Left N/S Control Unit VST A1669005605

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. A2059005222

Seat Module Mercedes W205 W253 Memory Control Unit Passenger's Side A2059005222

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3C0919275S-CGR

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1679008309

Mercedes W177 W247 Telematics Module Communication Control Unit A1679008309

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 10723AF

Ford Transit Connect Battery Box Tray Housing Holder Bracket 10723AF

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. YQE000380

Land Rover Freelander L314 Engine Fuse Box Electrical Relay Box Unit YQE000380

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2129001529

Mercedes-Benz C E Class W204 W207 W212 Front Left Door N/S Control Unit Module

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. C1BT-14A005-BNK

Ford Fiesta Mk7 Fuse Box Control Module Unit C1BT-14A005-BNK

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3456625

Mini R56 MMI Multimedia Switch Button Panel Radio Reader Boost CD Player 3456625

€332.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9207913

BMW F20 F21 F22 F30 F31 F32 F33 F36 G30 Fan Motor Relay 9207913

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3449417

BMW Mini Cooper R55 R55N R56 R56N LCi Ultra Sonic Module Alarm System 3449417

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971036D

Audi A4 B9 Front Door Wiring Harness Cable Loom Passenger Side 8W0971036D

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5346267

Ford Ranger Mk5 Battery Box Holder Mount Housing AB39-14A142-AA

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9148016-3

BMW E90 E91 E92 Professional CCC DVD Navigation Controller Plate 9148016

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6948182

BMW E60 E61 LCI Alarm System Unit Ultra Sonic Module

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BK2T-15K868-AF

Ford Transit Custom Mk1 Rear Parking Sensor Wiring Harness Cable BK2T-15K868-AF

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9344785

BMW F33 F83 M4 Convertible Folding Top Roof ECU Control Unit CTM 9344785

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3AA971693CB

VW Volkswagen Passat B7 Rear Door Wiring Loom Harness Left N/S 3AA971693CB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LK62-9D370-BA

Range Rover Evoque L551 Fuel Pump Control Unit Module ECU LK62-9D370-BA

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. B67824252-1

Mercedes R171 iPod Interface Multimedia Music Connection Module Cable B67824252

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. JPLA-14D618-CB

Land Rover Evoque L551 Front Door Control Module ECU Driver Side JPLA-14D618-CB

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T8945095D-2

Audi A5 8T Tail Light Lamp Wiring Plug Socket Rear Left N/S 8T8945095D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1T0035577AD

Volkswagen Touran 1T Aerial Antenna Amplifier Unit Module Left N/S 1T0035577AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6958358

BMW 5 X5 Series E39 E53 Hands-free Electronics Charging Module MULF 6958358

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7G91-3F880

Ford Mondeo Mk5 Steering Column Lock Control Unit Module 7G91-3F880-KA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7616500

BMW E90 E91 E92 N52 N52N Engine Starter Motor Valeo 7616500

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0971036J

Audi A1 8X Door Card Wiring Harness Cable Loom Front Passenger Side 8X0971036J

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0907063CF

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W0907063CF

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. N1WT-14F514-PFD

VW Amarok Mk2 Front Door Wiring Harness Keyless Left Right N/O/S N1WT-14F514-PFD

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079903805AF

Audi A5 S5 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805AF

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6F9035225

Seat Arona Antenna Amplifier Module AM/FM Diversity Aerial Booster 6F9035225

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9257098

BMW F10 F11 F20 F21 F22 F30 F31 Front Seat Control Module ECU 9257098

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 241268711R

Door Wiring Renault Master 3 Rear Sliding Cable Harness 241268711R

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 000051444K

Volkswagen Golf Mk5 1k Ipod Adapter Control Unit Box Module 000051444K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9318579

BMW F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module 9318579

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DS7T-15K603-AA

Ford Focus Mk3 Keyless Entry Control Module Antenna Unit DS7T-15K603-AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2383676

Battery Cable BMW F22 Negative Earth Cable Minus Electrical Wire 7625999

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8R0915181

Audi Q5 8R Negative Battery Terminal Cable Wiring Battery 8R0915181

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR034239-2

Range Rover L405 Tail Light Lamp Wire Harness Cable Plug Rear Left N/S LR034239

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1J0906381B

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9231175

Diversity Antenna Amplifier BMW F30 F32 Rear Window DAB Module Unit 9231175

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3c0937125

Volkswagen VW Passat B6 Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. RHD-A0009105202-3

Mercedes W164 Seat Lumbar Module Control Unit Front Driver Side A0009105202

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8577870

BMW X5 F15 Engine Control Module Unit ECU Diesel 8577870

€664.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 80A907355G

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

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009004710

PDC Module Mercedes W205 X253 Parking Sesnor Assist Control Module A0009004710

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0937503B

Audi A4 B9 A5 F5 A6 C8 Fuse Relay Box Power Distribution 8W0937503B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8373901

BMW 5 7 X5 E38 E39 E53 Steering Column Adjuster Switch Stalk 8373901

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2622610

Bluetooth Module BMW F10 F20 F23 F30 Teleservices GPS Telematics Control 2622610

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2754241-2

BMW MINI Cooper R55 R56 R57 Engine Computer Mount Support Bracket Holder 2754241

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DPLA-14C725-DB

Range Rover Evoque L551 Heated Seat Memory Control Module ECU DPLA-14C725-DB

€51.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6912244

BMW Z4 E85 Rear Bumper Antenna Mounted Aerial Unit FM 6912244

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5B3A404

BMW X1 U11 High Voltage HV Cable Harness Wire Loom Charging Electronics 5B3A404

€474.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2821508000

Mercedes W177 Alternator Generator Mount Bracket Holder M282 A2821508000

€108.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906018JR-1

Audi A4 B8 2.0 TDI CJCB Engine Control Unit Module ECU Kit 03L906018JR Manual

€284.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7636937

Ping Sensor BMW F20 F31 LCI Mini F55 F56 Engine Block Knock Sensor 7636937

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079903805AD

Audi RS4 RS5 B8 Alternator Mounting Bracket Support 4.2 FSI CFSA 079903805AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 30422-ELC-60057-BB-1

Mercedes Vito W639 Vito Taxi Penso Electronics Intercom 30422-ELC-60057-BB

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 0C8927769DB

Porsche Cayenne 92A 958 Gearbox Control Module ECU Tiptronic 0C8927769DB

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9384222

Body Module BMW X3 F25 X4 F26 Control Unit Junction Box JBBFE 3 9384222

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0971679C

Audi A6 C6 Glove Box Storage Compartment Wiring Loom Harness Cable 4F0971679C

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2048200089

Mercedes-Benz C E Class W204 W207 Aerial Antenna Amplifier Unit A2048200089

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9274347

BMW F32 Front Door Wiring Loom Cable Passenger Side 9274347

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AG9T-14240-CED

Ford S-Max Door Harness Loom Wiring Wire Rear Left N/S AG9T-14240-CED

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 0-390-201-999

BMW 5 Series E60 E61 Front Seat Backrest Adjustment Bosh 0 390 201 999

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6927000

BMW E63 E64 Amplifier Holder Catch Bracket Video Module 6927000

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0915181K

VW Volkswagen Caddy 2K Negative Cable Battery Terminal Wiring Loom 1K0915181K

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5G0971584AC

Volkswagen Caddy SB Driver's Air Module Wiring Loom Cable 2.0 5G0971584AC

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7559811

Earth Ground Cable BMW E60 E61 E63 N62N 540i 550i 650i Battery Starter Wiring

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BK3T-15K867-FC

Ford Transit Mk8 Front Bumper Fog Lights Wiring Loom Harness BK3T-15K867-FC

€99.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9306220

Telematics Module BMW F10 F20 F30 F31 Bluetooth Teleservices GPS 9306220

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7843332

Engine Wiring BMW F10 M5 F12 M6 Loom Harness Injection Valve Cyl. 5-8 7843332

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055400555

Mercedes W205 Door Electrical Wiring Harness Front Left N/S A2055400555

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 80A971687H

Audi Q5 FY Rear Door Wiring Harness Loom Cable Left Right N/O/S 80A971687H

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K0907334

Audi A6 C8 A7 C8 Fuse Box Power Distribution Unit Module Control 4K0907334

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0906093

Fuel Pump Control Audi TT FV A3 8V Petrol Engine Unit Module 5Q0906093

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GTC055R

Mercedes W207 W212 Display Screen Android Navigation Infotainment Unit GTC055R

€265.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7P6035670G

VW Volkswagen Touareg 7P CD Radio Stereo Head Unit Panel 7P6035670G

€522.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR028309

Range Rover Evoque L538 Rear Bumper PDC Wiring Harness Cable BJ32-15B484-AC

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8373700-1

BMW E60 E63 E87 E90 E91 2X Relay Make Contact White Green Set 8373700

€24.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9366920

Mini F55 F56 PDC Parking Distance Sensor Module Control Unit ECU 9366920

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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