What is a car electrical system?

This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.

What is an alternator for in a car?

The alternator generates electrical current when the engine is running and charges the battery.

What is the difference between a starter and an alternator?

The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.

How to check if the battery is working?

Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.

What are the most common symptoms of car electrical failure?

Problems starting the engine, flashing warning lights, power windows not working or dimming lights.

Do electrical parts from one model fit another?

Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.

How often should you check your electrical system?

It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

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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Part no. 9153418

BMW F10 F11 B Plus Distributor Front Battery Cable 9153418

€23.95

Free delivery: Mar 6 – 11

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Part no. 4K5962239

Audi A6 C8 Tailgate Opening Steering Line D Pulse Generator Flap 4K5962239

€56.95

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Part no. 06L971627M

Audi Audi Q5 FY 2.0 TFSI QUATTRO Petrol Fuel Injectors Wiring Harness 06L971627M

€23.95

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Part no. 8P0919475H

Audi A3 8P PDC Parking Assistance Distance Control Module Unit ECU 8P0919475H

€161.95

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Part no. 8793254

Door Wiring BMW X3 G01 F97 X4 G02 F98 Cable Harness Rear Left Right N/O/S

€23.95

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Part no. 02E911024A

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

€23.95

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Part no. 6835155

BMW 1 2 3 Series F40 F44 G20 Radio Antenna Amplifier Suppression Filter 6835155

€23.95

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Part no. 5Q0907530AM

Audi A3 8V VW Passat B8 Gateway Control Unit Module 5Q0907530AM

€28.95

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Part no. A2135452040

Mercedes W213 Head Unit Bracket Control Unit Module Holder Mount A2135452040

€23.95

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Part no. 9226331

BMW E87 LCI ECU Body Control Module Unit H2 9226331

€23.95

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Part no. 8058634

Engine Wiring BMW X3 M F97 X4 M F98 Loom Harness Ignition Module 8058634

€237.95

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BMW 3 5 6 Series E60 E61 E63 E64 E90 E91 FBAS Analog Video Module Unit 6960428

€225.95

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Part no. 8516753-1

BMW F01 730d F07 530d N57 245HP Engine Unit ECU Kit DDE 8516753 Automatic

€180.95

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Part no. 9387145

BMW F30 LCI 330e B48X Negative Earth Cable Battery 9387145

€23.95

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Part no. 5Q0959592L

Volkswagen Golf Mk8 Front Door Passenger Side Module Control Unit 5Q0959592L

€28.95

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Part no. 8517862-5

BMW F10 F20 F30 520d 120d 320d N47N 184HP Engine Unit ECU DDE 8517862 Automatic

€56.95

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Part no. 9137799

Door Wiring Mini Cooper R55 R56 R57 R58 R59 Passenger Cable 9137799

€23.95

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Part no. 8L0959655L

Audi A3 S3 8L Front Crash Impact Air Module Sensor Unit Module 8L0959655L

€32.95

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Part no. 1Z0035729E

Seat Ibiza 6J Bluetooth Interface Box Control Unit Module ECU 1Z0035729E

€28.95

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Part no. 9128569-1

BMW 1 Series E81 E82 E87 LCI E88 Wiring Harness Air Valve Air Flap 9128564

€23.95

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Part no. 8K0959663D

Audi Q3 8U A3 8P A6 C7 Voltage Stabilizer Converter Control Module 8K0959663D

€23.95

Free delivery: Mar 6 – 11

If paid before 14:00

Part no. 06K907425B-20

Volkswagen Golf R 5G MK7 2.0TFSI CJXC 300HP Engine Control ECU 06K907425B Manual

€161.95

Free delivery: Mar 6 – 11

If paid before 14:00

Part no. 06K907425B-17

Volkswagen Polo GTI 6R 1.8 TSI DAJA 192HP Engine ECU Kit 06K907425B BCM + Key

€165.95

Free delivery: Mar 6 – 11

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Part no. 9383963

BMW F20 F21 Amplifier AMP Audio Sound Booster HiFi 9383963

€113.95

Free delivery: Mar 6 – 11

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Part no. A2129014204

Mercedes-Benz W212 ECU Control Unit Sensor Module Airbag A2129014204

€37.95

Free delivery: Mar 6 – 11

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Part no. 5QS959655A

Audi A3 S3 8Y Air Module Crash Impact Sensor Unit Control ECU 5QS959655A

€303.95

Free delivery: Mar 6 – 11

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Part no. A2218207389

Mercedes W221 Seat Headrest Display Monitor Rear Entertainment Unit A2218207389

€218.95

Free delivery: Mar 6 – 11

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Part no. 3456860

Mini Cooper R58 R59 Fuse Box Fusebox Relay Unit Module Control Unit 3456860

€398.95

Free delivery: Mar 6 – 11

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Part no. 9197316

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit

€23.95

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Part no. A2129004407

Display Screen Mercedes W204 W212 Information Navigation Dashboard A2129018103

€56.95

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Part no. 9280186

BMW 5 7 Series F10 F11 F01 F02 F03 LCI Airbag Control Module ECU Unit 9280186

€23.95

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Part no. A1718701410

Mercedes SLK R171 Alarm Anti Theft System Control Module Unit Roof A1718701410

€94.95

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Part no. 7254970

BMW E92 LCI Grille Trim Panel Chrome Frame Front Right O/S 7254970

€23.95

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Part no. 8579480-1

BMW F20 120d F30 320d F10 520d N47N 184HP Engine Control Unit DDE 8579480 Manual

€113.95

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Part no. 9362395

BMW F20 F30 F31 F34 Electrical Body Control Unit Module REM V2 9362395

€42.95

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Part no. A2125403005

Mercedes W212 M271 Wiring Battery Alternator Starter Harness Cable A2125403005

€113.95

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Part no. A2035409213

Mercedes W203 Door Wiring Harness Front Left Right N/O/S Wiring Loom A2035409213

€27.95

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Part no. A0005457616

Mercedes R171 VDO Transmission Control Unit Module EGS A0005457616

€89.95

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Part no. 04L907309K-1

Audi Q3 8U 2.0 TDI Quattro Engine ECU Kit 04L907309K Ignition + Key

€161.95

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Part no. 9354758

BMW X3 F25 Central Gateway Module Control Unit Lear ZGW-02 4SK Mid 9354758

€37.95

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Part no. A0009061705

Mercedes W205 C63 Petrol Engine 14V 200A Alternator Generator Unit A0009061705

€113.95

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Part no. 2752518

BMW Mini Cooper R55 R56 Control Unit Module Bracket Holder PGS 2752518

€23.95

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Part no. 95B955941D

Porsche Macan 95B PDC Parking Sensor Wiring Loom Front Bumper 95B955941D

€165.95

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Part no. 9296494

BMW F20 F21 F22 F30 F31 F32 Control Unit Airbag Ecu 9296494

€28.95

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Part no. A2518703390

Mercedes W251 Rear Passengers Entertainment Control Unit A2518703390

€70.95

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Part no. A2059004521

Door Module Mercedes W205 GLC C253 Rear Left N/S Control Unit ECU A2059004521

€28.95

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Part no. 7111904

BMW X5 E53 Front Driver Seat Memory Electric Wiring Loom Harness 7111904

€37.95

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Part no. A2075403434

PDC Wiring Mercedes W204 W207 Parktronic Parking Sensor Cable Rear A2075403434

€23.95

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Part no. 80A915181A

Audi Q5 8R Battery Earth Negative Terminal Cable Lead 80A915181A

€23.95

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Part no. 5H22-18K891-AA

Land Rover Discovery 3 L319 Aerial Antenna Amplifier 5H22-18K891-AA

€23.95

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Part no. 7527610-5

Mini Cooper One R50 R52 W10 Engine Control Unit DME Manual 7527610

€23.95

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Part no. 6934096

BMW 7 Series E65 Cable Harness Door Rear Right Left N/O/S Wiring Loom 6923713

€23.95

Free delivery: Mar 6 – 11

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Part no. A2135409616-1

Mercedes Sprinter W910 Battery Sensor Negative Terminal Cable Wiring A2135409616

€28.95

Free delivery: Mar 6 – 11

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Part no. A2513200058

Mercedes ML W164 W221 Air Suspension Valve Block Control Unit Module A2513200058

€61.95

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Part no. A2189002002

Mercedes X218 CLS350 Automatic Trunk Lid Clossing Control Module A2189002002

€85.95

Free delivery: Mar 6 – 11

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Part no. 8K0959792A

Audi A5 8T Door Control Module Front Left N/S 8K0959792A

€23.95

Free delivery: Mar 6 – 11

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Part no. A2229002009

Mercedes W205 W222 Door Module Control Unit Rear Left N/S A2229002009

€23.95

Free delivery: Mar 6 – 11

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Part no. 6797439

BMW F07 GT ICM Management Control Unit Module DSC Brakes 6797439

€66.95

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Part no. 8H0035411D

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

€23.95

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Part no. 6920292

BMW 7 Series E65 Cable Harness Loom Front Door Wiring Left Right N/O/S 6920292

€23.95

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Part no. 9225792

BMW Z4 E89 Wiring Loom Passenger Side Door Cables Cable Harness 9225792

€23.95

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Part no. A2128202289

Mercedes W212 Aerial Antenna Module Amplifier Rear Window Top Left A2128202289

€23.95

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Part no. 8V0035465C

Audi A3 8V Bang & Olufsen Audio Sound Amplifier Stereo System Module 8V0035465C

€165.95

Free delivery: Mar 6 – 11

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Part no. 9174269-1

BMW F07 F10 F11 Speakers Amplifier Bracket Holder Mount Unit Module 9174269

€23.95

Free delivery: Mar 6 – 11

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Part no. 7210575-2

BMW F06 F12 F13 Rear Lamp Tail Light Side Panel Wiring Harness Left N/S 7210575

€23.95

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Part no. 9289587

BMW 2 X1 Series F45 F48 Radio Antenna Amplifier Suppression Filter 9289587

€23.95

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Part no. A6549061600

Starter Motor Mercedes W205 W213 W238 W447 OM654 Engine Diesel A6549061600

€47.95

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Part no. GK2T-11000-DB

Ford Transit Custom Engine Starter Motor 2.0 EcoBlue GK2T-11000-DB

€66.95

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Part no. A1779069601-1

Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

€123.95

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Part no. A2215403108

Mercedes W221 Door Wiring Front Right O/S Harness Loom Cable A2215403108

€28.95

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Part no. 9387151-1

BMW F30 Hybrid 330e B48X Positive Battery Lead Cable Starter Unit Wiring 9387151

€23.95

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Part no. 8507924

Gearbox Wiring BMW F20 F30 125d 325d N47S1 Engine Loom Harness Cables 8507924

€56.95

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Part no. 6919759

BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

€23.95

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Part no. 4L0971767

Audi Q7 4L Washer Bottle Reservoir Wiring Loom Harness 4L0971767

€23.95

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Part no. 7519618

BMW E46 E85 M54 Petrol Alternator Generator Bosch 120A 7519618

€42.95

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Part no. 9290013

BMW X3 F25 Footwell Light Control Unit Module ECU FRM III TEMIC 9290013

€37.95

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Part no. 8507909

BMW F20 F30 Wiring Harness Engine Transmission Module Diesel Manual N47N 8507909

€94.95

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Part no. 7L5971104E

Porsche Cayenne 9PA Rear Bumper Wiring Harness PDC Loom Cable 7L5971104E

€89.95

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Part no. A2035450301

Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

€23.95

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Part no. A1669051702

Mercedes-Benz A C M W166 W176 W205 Aerial Antenna Amplifier Unit A1669051702

€23.95

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Part no. A2059004113

Mercedes S205 Display Screen Multimedia Navigation Sat Head Unit A2059004113

€51.95

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Part no. A2469000012-2

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

€170.95

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Part no. A2465402705

Mercedes W176 Door Harness Loom Cable Wiring Front Left Right N/O/S A2465402705

€23.95

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Part no. A2465407832

Battery Cable Mercedes W176 W246 Positive Wiring Starter Harness A2465407832

€170.95

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Part no. 7599881-2

BMW E87 LCI E90 118i 318i N43 143HP ECU KIT DME 7599881 CAS3 + Key Automatic

€227.95

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Part no. 8267406

Headrest Adjustment BMW E46 E64 Front Right O/S Seat Actuator 8267406

€23.95

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Part no. A0009822112

Energy Distributor Mercedes W205 W238 Power Control Unit Module A0009822112

€23.95

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Part no. 7939175

Mini F54 F55 F56 F57 F60 Rain Light Solar HUD Sensor 9496244

€66.95

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Part no. 1K0907719C

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719C

€23.95

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Part no. 7160897

BMW X5 E53 E60 E61 E65 E81 E87 E90 E91 Turn Indicator Silver Bulb 7160897

€23.95

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Part no. 6920472

BMW 7 Series E65 E66 E67 Sensor Vehicle Centre AIRBAG

€23.95

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Part no. 6907520

BMW 5 X5 Series E39 E53 Dual Band Cable Compensator Hands Free Phone 6907520

€23.95

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Part no. A2055455100

Mercedes W205 W213 C238 Power Distribution Unit Busbar Connector A2055455100

€37.95

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Part no. E92-PDC-WIRING-LOOM-HARNESS-REAR-BUMPER-2

BMW E92 E92N LCI PDC Wiring Loom Harness Rear Bumper

€23.95

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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. 6805893

Mini F60 Countryman Door Wiring Harness Rear Left Right N/O/S 6805893

€37.95

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Part no. 7P0971225B

Volkswagen Touareg 7P Negative Battery Cable Wiring Loom 7P0971225B

€23.95

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Part no. 8617551

BMW F20 F22 F30 F31 Petrol N20 ECU DME Engine Control Unit 8617551 Automatic

€332.95

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Part no. 9153418-1

BMW 5 Series F10 F11 B Plus Distributor Box Front Battery Cable Unit 9153418

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Showing 1783-1881 of 13731 products

Key components of vehicle electrical systems

Original electrical parts for popular car brands

A car's electrical system is a complex system responsible for many key functions—from engine starting to lighting and on-board electronics. Modern cars are equipped with increasingly advanced electrical solutions that not only improve driving comfort but also enhance safety. At the Global Parts automotive store you will find a wide range of used car parts , such as alternators, starters, batteries, control modules and other automotive electrical systems that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini and many others.

How does a car's electrical system work?

A car's electrical system is a complex system that consists of several key components that work together to ensure the vehicle's reliable operation:

Battery accessories – Includes clamps, cables, holders and other components necessary for battery installation and maintenance.

Electronic control modules and controllers – They control and manage the operation of various vehicle systems, such as the engine, air conditioning and ABS.
Alternators and generators – Responsible for generating electricity and charging the battery while the engine is running.
Parts for alternators and generators – Including voltage regulators, brushes and bearings that ensure proper operation of the alternator.
Starters – Key components of the starting system that enable the engine to be started.
Starter parts – Including bendixes, rotors and solenoids necessary for the proper operation of the starter.
Batteries – They store the electrical energy necessary to start the engine and power on-board systems.
Wires, harnesses and connectors – They transmit energy and electrical signals between various vehicle systems.
Fuses and fuse boxes – Protect the electrical system against overloads and short circuits.
Relays – They control the flow of current in individual electrical circuits of the vehicle. A functioning electrical system is the basis for the reliability of your car, regardless of operating conditions.

Key technical parameters of electrical systems

Each of these components has specific technical parameters that determine its compatibility with the vehicle. For example, alternators installed in mid-range cars (e.g., Volkswagen Passat B6) typically have a capacity of 90 A to 140 A, while luxury vehicles (e.g., Mercedes S-Class) require alternators with a capacity exceeding 180 A. Starter motors vary in torque and operating voltage – the standard is 12 V, while 24 V starters are used in heavy-duty vehicles.

Why is it worth taking care of your car's electrical system?

Regular maintenance and replacement of electrical system components is key to reliability and road safety. Faulty components can lead to:

Problems starting the engine.
Failure of safety systems such as ABS or airbags.
Decreased efficiency of on-board equipment, e.g. lighting or air conditioning. At the Global Parts store we offer original used car parts , which have undergone detailed quality tests, ensuring their full functionality.

Symptoms of electrical system disruptions

In practice, electrical faults manifest themselves in a variety of ways. Drivers most often notice: dimming lights when parked, difficulty starting the engine, a voltage drop on the on-board computer, or air conditioning malfunctions. The table below presents typical correlations:

Symptom	Possible cause	Item to check
Difficulty starting the engine	Worn out starter or battery	Starter motor, battery
Dimming the lights	Inefficient alternator	Alternator, voltage regulator
Electric windows not working	Damaged relays or harness	Relays, wires

How to choose the right parts for your electrical system?

When choosing parts for the electrical system, such as alternators, starters or control modules, it is worth paying attention to:

Vehicle-specific fit – Every car make and model requires specific specifications. At Global Parts, you'll find parts that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini, and many more .
Technical condition – All used parts we offer are thoroughly checked to ensure their reliability.
Technical parameters – For example, alternators should have appropriate current output, adapted to the needs of your vehicle.

Compatibility and fit

The selection of electrical parts is based primarily on OEM part numbers, but matching them to specific parameters is equally important, including current, voltage, and the number of connector pins. For example, the 120A alternator used in the Audi A4 B7 differs significantly from the 150A version installed in the Audi A6 C6 . Therefore, using manufacturer catalogs or providing the VIN makes finding the right component much easier.

Why choose used electrical parts?

Purchase of used car parts This solution allows you to combine savings with quality. Why choose it?

Lower costs – Used alternators, starters and other parts are cheaper than new ones, but offer the same high quality.
Ecology – You support recycling and reduce waste by choosing used car parts .
Wide range – We offer electrical parts for the most popular car brands, so you can easily find what you need.

How to take care of your car's electrical system?

To ensure your electrical system operates reliably for years, it is worth remembering a few rules:

Regularly check the battery condition and charge level.
Take care of your cables and connectors – corrosion or damage can lead to voltage drops and failures.
Monitor the operation of the alternator and starter – early detection of problems will help avoid more serious breakdowns. If you have any problems, you will find the right car parts at Global Parts that will help restore your vehicle to full working order.

Step-by-step control procedures

Measure the battery voltage with a multimeter – the resting value should be approximately 12.6 V.
Check the charging voltage with the engine running – the correct range is 13.8–14.5 V.
Assess the condition of the wires and terminals – lack of corrosion and a firm seat are essential.
If in doubt, check the quiescent current consumption – it should not exceed 0.05–0.08 A.

FAQ - Frequently asked questions about electrical systems in cars

Question	Answer
What is a car electrical system?	This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.
What is an alternator for in a car?	The alternator generates electrical current when the engine is running and charges the battery.
What is the difference between a starter and an alternator?	The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.
How to check if the battery is working?	Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.
What are the most common symptoms of car electrical failure?	Problems starting the engine, flashing warning lights, power windows not working or dimming lights.
Do electrical parts from one model fit another?	Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.
How often should you check your electrical system?	It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Summary: Automotive electrical systems at Global Parts Automotive Store

Automotive electrical systems are the foundation of the reliability and comfort of every modern vehicle. By choosing the right parts, such as alternators, batteries, and control modules, you can ensure your car's full operational efficiency. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , or others, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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