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. 8S0915181C

Audi Q5 FY A5 Negative Battery Terminal Cable Wiring 8S0915181C

PLN 42.95

Delivery: Mar 13

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Part no. A9075406960-1

Mercedes Sprinter W907 Fuse Box Prefuse Box Module F150/1 - MFB-1 A9075406960

PLN 189.95

Free delivery: Mar 13

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Part no. A9065403527

Positive Cable Mercedes W906 OM651 Battery Starter Alternator Plus A9065403527

PLN 94.95

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Part no. A2469054201

Mercedes CLA C117 W176 Aerial Booster Antenna Amplifier A2469054201

PLN 61.95

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Part no. 7522284

Mini Cooper One R50 R52 W10 Battery Cable Plus Pole 7522284

PLN 42.95

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Part no. A2518206510

Mercedes W212 Light Sensor Sunlight Sensor Front A2518206510

PLN 42.95

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Part no. 7550017

Mini Cooper One Clubman R55 R56 R58 R59 R60 Starter Motor 1.6 Engine 7550017

PLN 42.95

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Part no. 6794618

EMF Actuator BMW F10 F12 Brake Caliper Parking Brake Unit Electric 6794618

PLN 94.95

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Part no. 7510738-7

Ignition Coil Mini R50 R52 R53 Petrol W10 Coil Pack Module Unit 7510738

PLN 56.95

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Part no. 9374507

BMW F23 REM Rear Electronic Module Fuse Box Control Unit V2 9374507

PLN 75.95

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Part no. 6938966

BMW 5 Series e60 Suppression Filter Radio Areal Amp Supressor 6938966

PLN 13.95

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Part no. 8376445

BMW X3 X5 E53 E83 E46 E39 LCI Switch Unit Steering Column 8376445

PLN 75.95

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Part no. 7802928

BMW E60 E90 Alternator Generator 150A 335d 525d 530d 535d M57N2 7800308

PLN 284.95

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Part no. 8586572

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

PLN 142.95

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Part no. 7524109

BMW Z4 E85 Petrol M54 Wiring Loom Harness Engine Gearbox Manual 7524109

PLN 170.95

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Part no. 8706502

BMW 1 3 4 Series F20 F21 F30 F31 Radio Remote Control Receiver 434 MHZ 8706502

PLN 42.95

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Part no. A1648203085

Mercedes ML W164 Window Windscreen Rain Light Sensor A1648203085

PLN 42.95

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Part no. 6977427

BMW E87 E90 E91 Mini Cooper R50 R52 R53 Air Module Control Unit ECU 6977427

PLN 42.95

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Part no. A1715420123

PDC Display Mercedes W169 W211 Parking Distance Sensor Control Unit A1715420123

PLN 42.95

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Part no. 7557027

BMW X5 E70 X6 E71 E72 Battery Earth Cable Wiring Loom 7557027

PLN 123.95

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Part no. 7808073

BMW E90 E91 E92 E93 LCI Diesel N57 Alternator 150A 7808073 7805432

PLN 189.95

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Part no. A0009820212

Mercedes W176 W212 W246 Voltage Converter Inverter Power Distributor A0009820212

PLN 94.95

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Part no. A0025422619

Mercedes ML W163 Relay 4-Pin Grey Tyco A0025422619

PLN 42.95

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Part no. 420919275-PHB1

Audi A5 8T Parking Distance PDC Rear Ultra Sonic Sensor Phantom Black - Z9Y

PLN 42.95

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Part no. 8507885

BMW 1 3 Series F20 F30 Diesel N47N Wiring Harness Engine Gearbox Module 8507885

PLN 142.95

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Part no. 9803844-1

Mini Cooper Countryman R58 R60 R61 Aerial Roof Antenna Base Module 9803844

PLN 42.95

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Part no. 7532966-1

BMW E87 E90 LCI Alternator Generator Bosch 150A Petrol Engine

PLN 265.95

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Part no. 6989713

BMW 1 3 Z4 Series E88 E89 E93 Convertible Cabrio DWA-Alarm System Module 6989713

PLN 42.95

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Part no. 1508937

BMW Mini Cooper S One D R50 R52 R53 Negative Battery Cable Wire 1508937

PLN 42.95

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Part no. 9239985

BMW F10 F11 Control Unit ECU Module Airbag Safety Unit 9239985

PLN 65.95

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Part no. 6929715

BMW 1 Series E81 E87 E87N Positive Battery Lead Cable 61126929715 6929715

PLN 66.95

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Part no. 7514357

BMW Z4 E85 Roadster Cabrio Cable Alternator Starter Base B 7514357

PLN 42.95

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Part no. A2229055804

Mercedes CLA C117 W176 W205 Aerial Antenna Amplifier Unit A2229055804

PLN 42.95

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Part no. 2990911

BMW X1 Series E84 Carrier Bracket Holder Control Module Unit 2990911

PLN 47.95

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Part no. 8X0915181

Audi A4 B8 A5 8T TT Mk2 Negative Battery Terminal Cable Lead 8X0915181

PLN 42.95

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Part no. 6935599

BMW 1 3 Series E81 E87 E90 PDC Parking Ultrasonic Sensor Red Japanrot Japan Red

PLN 42.95

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Part no. 6797326

Mini Cooper One R55 R56 R57 LCI R58 R59 R60 R61 Speed Sensor 6797326

PLN 94.95

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Part no. 6938064

BMW E65 E66 E67 Amplifier Rear Window Antenna Amplifier Module 868MHZ

PLN 70.95

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Part no. 8514120

Preheating Control BMW F20 F21 F30 F31 LCI B47 Glow Plug Unit Diesel 8514120

PLN 42.95

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Part no. 9177983

BMW E87 LCI Body Control Module Junction Box H2 9177983

PLN 42.95

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Part no. A6512012009

Alternator Support Bracket Mercedes W212 OM651 Belt Tensioner Holder A6512012009

PLN 42.95

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Part no. 3424581

BMW X3 Series E83 Airbag Control Unit Module ECU 65773424581 3424581

PLN 142.95

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Part no. A6519062800

Starter Mercedes W204 W212 W906 Diesel OM651 Starter Motor Bosch A6519062800

PLN 94.95

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Part no. 9803844

Mini Cooper Countryman R60 R61 Aerial Roof Antenna Base Module 9803844

PLN 61.95

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Part no. 1489995

Mini Cooper R50 R52 R53 Starter Motor W10 1.6 Petrol Engine 1489995

PLN 42.95

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Part no. A9065460121

Mercedes W906 Battery Cable Negative Lead Wiring Harness A9065460121

PLN 42.95

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Part no. 9284331-1

Mini R55 R56 R60 R61 Roof Operating Unit Light Switch 3455632

PLN 42.95

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Part no. A0009821012

Mercedes W166 W213 C238 Power Distribution Plate Control Unit Module A0009821012

PLN 42.95

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Part no. 3AA907801H

Audi Q3 8U Parking Brake Handbrake Module Control Unit 3AA907801H

PLN 42.95

Delivery: Mar 13

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Part no. 2754241-2

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

PLN 42.95

Delivery: Mar 13

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Part no. 9116542

BMW E39 X5 E53 X3 E83 PDC Parking Distance Control Unit Active Module 9116542

PLN 94.95

Free delivery: Mar 13

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Part no. 9265300

BMW 1 2 Series F20 F21 F22 F23 LCi Headlight Switch Control Element Light

PLN 75.95

Free delivery: Mar 13

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Part no. 7M0951253C

Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

PLN 42.95

Delivery: Mar 13

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Part no. 9226357

BMW F20 F21 F30 TOP HIFI Loudspeaker Tweeter Harman Kardon 9226357

PLN 94.95

Free delivery: Mar 13

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Part no. A0055421218

Crash Sensor Mercedes W176 W204 W212 Impact Airbag Unit Module A0055421218

PLN 47.95

Delivery: Mar 13

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Part no. 4G0907397R

Audi S1 8X Front Lamp Headlight DRL Ballast Control Module Unit 4G0907397R

PLN 118.95

Free delivery: Mar 13

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Part no. 8K0907801H

Audi A4 B8 A5 8T Parking Module Electric Brake Control Unit 8K0907801H

PLN 94.95

Free delivery: Mar 13

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Part no. A2125420018-TNG

Mercedes W204 Parking Sensor PDC Distance Front Tenorite Grey - 755 A2125420018

PLN 61.95

Free delivery: Mar 13

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Part no. 7808257

BMW E90 E91 LCI F10 Wiring Harness Engine Glow Module N57 7808257

PLN 104.95

Free delivery: Mar 13

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Part no. 8509722

BMW 1 Series F20 F21 F22 F30 F31 F35 Control Unit Box Engine 8509722

PLN 56.95

Delivery: Mar 13

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Part no. 9224422

Bluetooth Control Unit BMW E60 E87 E90 Telematics Module ECU 9224422

PLN 61.95

Free delivery: Mar 13

If paid before 14:00

Part no. 9326204

BMW X3 F25 B+ Distribution Box Battery Power Front Control Unit Point 9227458

PLN 42.95

Delivery: Mar 13

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Part no. 6911519

BMW E65 E66 E67 Wiper Switch Stalk Steering Column Wheel 6911519

PLN 42.95

Delivery: Mar 13

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Part no. 6974890-MYS

BMW E87 E90 E91 LCI PDC Ultrasonic Parking Sensor Mysticblau Blue - A07

PLN 42.95

Delivery: Mar 13

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Part no. 6814609

BMW 1 3 5 Series F10 F20 F30 Bus Interface Connector Data Terminating 6814609

PLN 42.95

Delivery: Mar 13

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Part no. 6793850

Adapter Lead Wire BMW F20 F21 F22 F23 F30 F31 F32 F33 VDC Cable Harness 6793850

PLN 94.95

Free delivery: Mar 13

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Part no. 8321087

BMW 5 SERIES E60 ELECTRIC SEAT Height Adjust 0390203234 8321087

PLN 37.95

Delivery: Mar 13

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Part no. 9216468

BMW F10 F11 F20 F30 F31 Front Seat Heating Control Module ECU 9216468

PLN 47.95

Delivery: Mar 13

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Part no. 9805533

Mini R60 Rear PDC Ultrasonic Parking Sensor Royal Grey Metallic 9805533

PLN 75.95

Free delivery: Mar 13

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Part no. A0055422018

ESP Sensor Mercedes W164 W221 Yaw Rotation Rate Sensor A0055422018

PLN 42.95

Delivery: Mar 13

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Part no. 9201989

BMW X3 X5 X6 E60 E61 LCI E70 E71 F01 F02 F25 Rain Light Solar Sensor

PLN 42.95

Delivery: Mar 13

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Part no. 7259883

Stop Lamp Cover BMW F30 F80 M3 Rear Third Stop Brake Lamp Trim 7259883

PLN 94.95

Free delivery: Mar 13

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Part no. 9152262

BMW X5 E70 X6 E71 Front Crash Impact Sensor Module 9152262

PLN 94.95

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Part no. 7515197

BMW Mini Cooper One R50 W10 Battery Cable Plus Pole 7515197

PLN 42.95

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Part no. 9381445

Mini Cooper F55 F56 F57 IBS Negative Battery Lead Cable 9381445

PLN 47.95

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Part no. A2129004203

Mercedes W212 Boot Lid Control Unit Trunk Lid Module A2129004203

PLN 42.95

Delivery: Mar 13

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Part no. A2709060026

Starter Motor Mercedes W176 W246 Engine Starter Unit 12V Denso A2709060026

PLN 75.95

Free delivery: Mar 13

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Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

PLN 42.95

Delivery: Mar 13

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Part no. A1668200689

Antenna Amplifier Mercedes W176 Aerial Module Unit Rear A1668200689

PLN 42.95

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Part no. A2025402373

Mercedes W169 W203 W204 W211 OBD Diagnostic Plug Cover A2025402373

PLN 42.95

Delivery: Mar 13

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Part no. A2038200189

Mercedes C CLK Class W203 W209 Antenna Amplifier Radio Left N/S A2038200189

PLN 84.95

Free delivery: Mar 13

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Part no. 9809354

Mini R55 R56 R60 R61 Air Module ECU Control Unit Module 9809354

PLN 42.95

Delivery: Mar 13

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Part no. A6459060800

Starter Motor Mercedes W176 W246 C117 Diesel Engine Denso A6459060800

PLN 61.95

Free delivery: Mar 13

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Part no. 9319081

BMW F20 F21 F22 F30 F31 F32 Radio Remote Control Receiver 434 MHZ

PLN 42.95

Delivery: Mar 13

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Part no. 8T0035415B

Audi A4 B8 Loudspeaker Front Door Left Right N/O/S Bang&Olufsen 8T0035415B

PLN 237.95

Free delivery: Mar 13

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Part no. 7798006

BMW E60 E61 E87 LCI E81 E82 X1 E84 E90 E91 N47 Diesel Starter Motor 7798006

PLN 42.95

Delivery: Mar 13

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Part no. A0051513901

Kompressor Mercedes W203 W211 M271 Petrol Engine Starter Motor A0051513901

PLN 61.95

Free delivery: Mar 13

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Part no. 7571142

Plus Cable Wiring Mini Cooper R55 R56 R57 Battery Lead Power Positive 7571142

PLN 42.95

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Part no. 8373700-1

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

PLN 42.95

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Part no. 2757771

Mini Cooper R50 R53 R56 R57 R58 Fuel Tank Heat Insulation Plate 2757771

PLN 47.95

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Part no. 7521582

BMW E46 E83 E85 Engine Electronics Unit Box Cover Trim 7521582

PLN 42.95

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Part no. 9322900

BMW F20 F21 F22 F30 F31 Negative Minus Pole IBS Battery Lead Cable 9322900

PLN 61.95

Free delivery: Mar 13

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Part no. 1K0971228L

VW Golf MK5 6 Audi A3 8P Positive Battery Terminal Cable 1K0971228L

PLN 42.95

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Part no. 9387624

BMW F20 F21 F30 Sensor Rain Light Solar Condensation 9387624

PLN 42.95

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Part no. A2048210651

Mercedes W204 Air Module Impact Crash Sensor Door A2048210651

PLN 42.95

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Part no. 6887752

ICM Air Module BMW F20 F21 F22 F30 F31 Control Unit ECU 6887752

PLN 85.95

Free delivery: Mar 13

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Part no. 9237655-2

BMW E60 E61 E81 E87 E90 F10 Audio Aux In Socket Plug 9237655

PLN 42.95

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Part no. 6910542

BMW 3 X3 Series E46 E83 Battery Cable Plus Pole Power Positive 6910542

PLN 66.95

Free delivery: Mar 13

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Part no. A6511501433

Mercedes W176 W246 Glow Plug Wiring Harness Loom OM651 Engine A6511501433

PLN 42.95

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Showing 199-297 of 13820 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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