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 A207 Convertible Roof Control Module Unit ECU Soft Top A2079004300

£137.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6121533279-1

Mercedes-Benz ML W163 270 CDI Engine Control ECU Kit A6121533279 Key Automatic

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049001202

Mercedes W204 S204 Estate Rear SAM Control Unit Module A2049001202

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0907064KH

Audi Q5 8R BCM Body Control Module Unit ECU 8K0907064KH

£151.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-1872916

Ford Focus Mk3 Front Door Control Module Door Lock Left N/S BV6N-14B533-BK

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9079001605

Mercedes W907 Central Gateway Control Unit Module Relay ECU A9079001605

£379.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8586572

Engine Wiring BMW F20 LCI F30 F31 B47 Automatic Gearbox Loom Harness 8586572

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0959593H

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139003217

Gearbox Module Mercedes W177 W205 W213 Control Unit ECU Automatic A2139003217

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9281722

BMW E93 Cabrio Convertible Folding Top Roof ECU Module CTM 9281722

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 99661510200

Porsche Boxster 986 Rear Spoiler Control Relay 99661510200

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P4971693AB

Audi A3 8P Door Wiring Harness Loom Cabling Rear Left Right N/O/S 8P4971693AB

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6902285

BMW E39 E87 E90 E91 Trigger Contact PDC Sensor Tweeter Gong 6902285

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7801217-4

BMW X3 E83 3.0d M57N2 218HP ECU Control Unit Kit DME 7801217 EWS3 Key Automatic

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9359013

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9359013

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7555185

E-Box Fan BMW X5 E70 X6 E71 Sunon Cooler PSD1205PIBX-A 13.5V 7555185

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6822586

BMW F10 LCI F20 F21 F30 F31 DAB Bluetooth Head Control Unit Module Basic 6822586

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7391042

BMW F10 F30 X1 F48 Mini F54 Rear Tailgate Smart Opener Top Wire Sensor 7391042

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049005003

Mercedes S204 Estate Fuse Box Rear SAM Module Control Unit A2049005003

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0959592H

Audi A4 B9 A5 F5 Front Door Module Control Unit ECU Passenger Side 8W0959592H

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9259354

BMW F10 F20 F30 Camera Module Reversing Rear View Camera Control 9259354

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2078210411

Mercedes W204 W207 Centre Console Connector AUX USB Port Socket Trim A2078210411

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059008304

Mercedes W205 SAM Module Rear Body Comfort Control Unit ECU A2059008304

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0937084DC

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

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8510221-8

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6994548

BMW G30 G31 Body Control Comfort Module Unit FEM BDC ECU V04 6994548

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7177697-3

Plug Socket BMW E61 LCI Rear Lamp Touring Trunk Lid Wiring Left N/S 6984746

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2098205926

Mercedes CLK C209 Body Control Module Unit A2098205926

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8634244

Engine Wiring BMW F45 Mini F60 B38 Loom Harness Injection Valve Ignition 8634244

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5293147

Relay Glow Littlefuse Mega Fuse 250 Amp 5293147

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1179001801

Mercedes W176 Air Module System Control Unit Module ECU A1179001801

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5NA035284C

VW Volkswagen Golf SV Online Services Module Control Unit ECU 5NA035284C

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6939709

BMW 5 6 Series E60 E61 E63 Driver Side Door Airbag Control Unit Module 6939709

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8582279

BMW F30 320d ed Diesel N47N 184HP Engine Control Unit ECU DDE 8582279

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049009410-1

Mercedes W204 CD Player Radio Stereo Navigation Sat Nav Head Unit A2049009410

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469006816

Mercedes W176 W231 W246 Electric Parking Brake Control Unit Module A2469006816

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118700026

Bluetooth Module Mercedes W203 W211 W219 Control Unit Hands Free A2118700026

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA959655J

Audi S3 8Y Air Module Control Unit SRS System ECU 5WA959655J

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0962132A

Audi Q3 F3 Keyless Entry Amplifier Control Box Module Aerial Antenna 5K0962132A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7515197-1

Mini Cooper One R50 W10 Battery Cable Wiring Plus Pole 7515197

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A6395400830

Mercedes Vito Viano W639 Battery Cable Positive Wire Lead Terminal A6395400830

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F1971693D

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971693D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007500-22

Mercedes C204 C250CDI 651.911 Engine ECU Kit A6519007500 Ignition + 2 Keys

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1679003604

Keyless Go Module Mercedes C118 W177 W247 ECU Entry Control Unit A1679003604

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059055211

Mercedes W117 W154 W205 W213 W217 Tailgate Open Switch Sensor Rear A2059055211

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2124407558

Alternator Wiring Mercedes W212 C218 Diesel OM651 Alternator Fuse Box Harness

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049060305

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2049060305

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645400350-1

Mercedes ML W164 Fuse Prefuse Box Jump Start Terminal A1645400350

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. BK2T14A094AA

Ford Transit Mk8 Custom Fuse Pack BK2T14A094AA

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959793R

Audi Q5 8R Door Module Front Left N/S Control Unit ECU Controller 8K0959793R

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8W0959593N

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

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9141446

BMW E93 Cabrio Convertible Hydraulic Pump Power Supply Cable 9141446

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6951537

BMW 1 Series E87 ECU Body Control Module Unit PL2 JBBFE 31656951537 6951537

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P0035192SX

Audi A3 S3 8P Radio Media GPS Sat Audi Navigation Plus Unit 8P0035192QX

£199.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 4M0959595N

Audi Q7 4M Rear Door Control Module Unit ECU Left Right N/O/S 4M0959595N

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469052602

Dashboard Panel Mercedes W176 W246 Switch Dynamic Select Start/Stop A2469057902

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. KV6A5H298CC

Ford Transit Connect Mk2 AdBlue Control Module ECU 1.5 TDCi Diesel KV6A-5H298-CC

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7799855-1

BMW X3 Series E83 M47N2 2.0d 150HP ECU Kit DDE + EWS3 + Key 7799855 Manual

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P0907357J

Audi A3 8P A6 C6 Front Lamp Headlight Range Control Module Unit ECU 8P0907357J

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9316569

BMW X5 F15 Fuse Box Rear Relay Module Control Unit 9316569

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038703594

Mercedes CL203 CLC Head Unit CD Player Radio Audio Controller Unit A2038703594

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8T0035785A-1

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7316218

Headlight Module BMW F01 F02 LCI Xenon Headlamp Control Unit Lear TMS 7316218

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2124400706

Wiring Harness Mercedes W212 LED Lighting Air Nozzle Cable A2124400706

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009059300-CVB1

Mercedes W205 W212 W246 Parking Distance Sensor Set x2 Cavansite Blue - 890

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6461502734-1

Mercedes W204 C220 CDI 170HP 646.811 Engine Unit ECU A6461502734 Automatic

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9224687

BMW Mini Clubman R55 LCI Cable Wiring Loom Splitdoor Door Rear Left N/S 9224424

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8518569-4

BMW F20 F21 F30 F31 N47N 116d 316d Engine Control Unit ECU DDE 8518569 Automatic

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7P5035481D-2

Porsche Cayenne 92A Sound Audio Amplifier Bose AMP 7P5035481D

£232.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7N0907530R

VW Volkswagen Golf 6 Seat Altea 5P1 Gateway Control Unit Module ECU 7N0907530R

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. LR014114

Range Rover L405 Headlight Left Right N/O/S Ballast Control Unit AH22-13C170-AA

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9383681

Mini F55 Fuse Box Front Body Control Module ECU BCM Unit 13275881

£104.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 5Q0937125A

Fuse Relay Box Volkswagen Audi Skoda Seat Engine Bay Supply Unit 5Q0937125A

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2135400124

Mercedes W213 Fuse Relay Electrical Box Housing Covering Panel A2135400124

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. HB3T-14K039-EB

Ford Ranger Wildtrak Automatic Gearbox Wiring Loom Harness HB3T-14K039-EB

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7541009

BMW E90 E90N E91 E91N E92 E92N E93 LCI NOX Wiring Loom Cable 7541009

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2383401000

Battery Pipe Mercedes W205 W213 C238 W257 W290 Hose Line Tube A2383400800

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. AV6T14A067BC

Ford Transit Connect Mk2 II Fuse Box Battery Terminal Unit Module AV6T14A067BC

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K1907115C

Audi A4 B8 1.8 TFSI CDHA 160HP Engine Control Unit ECU Kit 8K1907115C Manual

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2215403410

Mercedes W221 Negative Battery Terminal Cable Wiring Lead A2215403410

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0907530L

Volkswagen Golf Mk7 Gateway Control Unit Module 5Q0907530L

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9M5Q12A343AA

Ford Mondeo MK4 Diesel Glow Plug Relay Control Unit Module 9M5Q12A343AA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2044401005

Mercedes-Benz C W204 Rear Left N/O/S Right Door Wiring Loom Harness A2045407609

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7176068-2

BMW 3 6 X3 Series E46 E63 E83 MINI R50 R53 Control Unit Xenon Light 1307329074

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6549009900

Glow Plug Relay Mercedes W177 Diesel OM654 Preglow Module A6549009900

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7595179-15

BMW E81 E87 LCI N43 116i 1.6 122HP ECU Control Unit Kit DME 7595179 CAS3 + Key

£123.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8518268-3

BMW E90 E91 LCI 318d Diesel 143HP N47N ECU Kit DDE 8518268 + CAS3 + Key Manual

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4869809-3

BMW E82 E88 Rear Lamp Taillight Tail Light Left N/S Harness Wire Loom 7285641

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8617050

Mini One R56 LCI N16 1.6 98HP Engine Control Unit Module ECU DME 8617050 Manual

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218708992

Mercedes W221 C216 Telephone Bluetooth Connection Control Module A2218708992

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9128982

BMW F20 F30 F31 LCI Mini F55 F56 Compensator LTE UK Control Unit Module 9128982

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. FK72-19H440-BF

Land Rover Discovery Sport L550 Keyless Module Control Unit FK72-19H440-BF

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1765406005

Mercedes X156 Wiring Harness Loom A1765406005

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7P6919603

VW Volkswagen Touareg 7P Dashboard Multimedia Display Screen Panel 7P6919603

£118.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 7807828-3

BMW E87 LCI E90 118d 318d N47 143HP Diesel ECU KIT DDE 7807828 CAS3 + 2 Keys

£89.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469005515

Mercedes W176 Rain Light Sensor Control Unit Front Windscreen Camera A2469005515

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1S0919275D-BLK

Audi Q3 8U PDC Parking Distance Control Sensor Black - Z9Y 1S0919275D

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8J0945096G-2

Audi TT 8J Rear Tail Lamp Light Wiring Harness Plug Right O/S 8J0945096G

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0035842B

Skoda Superb 3V Rapid NH Octavia 5E Radio Head Unit CD Media Stereo 5Q0035842B

£127.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

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