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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Products in promotion

Part no. 7856819

Battery Cable BMW F90 M5 F91 M8 Wire Lead Positive Alternator Starter B+ 7856819

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7928461

BMW G11 G12 G29 G31 G38 Radio Remote Control Receiver Module Unit 7928461

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9380323

BMW 5 Series F10 Steering Column Module Electronic Control Unit ECU 9380323

PLN 265.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8067512

BMW F10 F11 F30 F31 Alarm System Unit Security Basis Module 8067512

PLN 256.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6878191

Air Module BMW F01 F02 LCI F10 F11 F13 ECU ICM Control Unit 6878191

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9266838

BMW X3 F15 Can Bus Interface 120Ohm Control Module Unit ECU 9266838

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6938226-1

BMW E90 E90N E91 E91N LCI M3 Wiring loom rear door left right 6938225

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9122100

BMW 1 Series E88 Mini Cooper R57 R59 Sat Nav GPS Antenna Amplifier 9122100

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9292945

BMW F20 F21 F22 F30 F31 F32 F36 FEM Module Control Unit 9292945

PLN 522.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9890599

BMW F90 M5 G11 G30 Air Module Crash Control Unit 9890599

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9294912

BMW F10 F11 X5 F15 X6 F16 Rear Seat Compartment Screen Display SET 9294912

PLN 2,089.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9174271

BMW F10 LCI Bluetooth Control Unit Module Bracket Holder Mount 9174271

PLN 37.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9382516

PDC Module BMW F15 F16 F25 Mini F55 F56 Parking Assistant Control Unit 9382516

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8506657

BMW X3 F25 Starter Motor Diesel Engine 12V Bosch 8506657

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8571038

BMW 1 F20 F21 LCI Mini D F56 B37 Wiring Harness Engine Glow Plug Module 8571038

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7933357

Headlight Module BMW F40 LED Headlamp Control Unit Lear FLM 2 LOW 7933357

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9294206

BMW F25 CD DVD Navigation Sat Nav Head Unit 9294206

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8514766

BMW 1 Series F20 114d 116d ed N47N Wiring Harness Engine Glow Module 8514766

PLN 759.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8639595

BMW F30 F31 F32 320i 420i N20 ECU Engine Control Unit DME 8639595 Automatic

PLN 1,433.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8573260-5

ECU Kit BMW F20 F21 116d Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

PLN 1,234.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9438731

BMW F20 F21 F22 F30 F31 F32 F36 Body Control Module Unit FEM LR01 9438731

PLN 617.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9274276

BMW F07 Gran Tourismo Headlight Footwell Light Control Module FRMIII 9274276

PLN 218.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8621840

BMW 1 3 Series F20 F21 F30 LCI Starter Motor Engine 8621840

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8585641

Engine Wiring BMW F20 F21 F30 F31 N47N Diesel Loom Harness Cable 8585641

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6882971

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Air 6882971

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6819651

BMW X5 F15 Rear Fuse Box Distribution Relay Module Control ECU Unit 6819651

PLN 85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7951069

KaFAS Camera BMW F45 Front Camera Control Unit Module 9384688

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6992955

BMW F25 Footwell Light Control Module ECU Unit FRM3 TEMIC 6992955

PLN 408.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9312768

BMW F06 F07 F10 F11 Comfort Module Body Control Unit Module BCM Unit ECU 9312768

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9153418

BMW F10 F11 B Plus Distributor Front Battery Cable 9153418

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9228491

BMW 5 Series F10 ECU Body Control Module V2 Junction Box 61359228491 9228491

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6819334

BMW F20 F21 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 6819334

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9267535

BMW X3 F25 Body Control Module ECU Junction Box JBBFE III 3 V9 Lear 9267535

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6807634

BMW X5 F15 F20 F30 SRS Air Module Bag Control Unit Module ECU 6807634

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6933264

BMW E65 E66 Control Unit Door Rear Passenger Side 6933264

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7222633

BMW E90 E91 LCI Flat Cable Wiring Wire CAS Start Stop ECU Loom 7222633

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9264924

BMW F01 F02 F10 F11 F13 Power Distribution Fuse Box Rear 9264924

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6821135

BMW F20 F21 F22 F30 F31 Head Unit Media DAB Navigation Business Headunit 6821135

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7115655-LMB

BMW X3 E60 E61 E83 Front PDC Parking Distance Sensor Le Mans Blau - 381

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9281068

Antenna Receiver BMW F33 F83 M4 Convertible Aerial DAB Unit 9281068

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6956744-1

BMW E81 E82 E87 E88 E90 E91 Parking Sensor PDC Sydneyblau - A19 6956744 SET X2

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8509105

BMW E90 E91 E92 LCI N47N Cable Alternator Starter Base B+ 8509105

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6956939-1

Changer Unit BMW E63 E64 6-disc Compact CD Head Player 6956939

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6934095

BMW 7 Series E65 E66 Door Wiring Harness Rear Right Left N/O/S

PLN 28.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8631637

Earth Ground Cable BMW i3 I01 Battery Starter Terminal Wiring 8631637

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9343317

Audio Amplifier BMW F20 F21 F22 Harman/Kardon Active Sound Design System 9343317

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9352750

BMW X6 F16 F86 Camera Kafas Front Windscreen Camera Module 9352750

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9240236

BMW F01 LCI F10 F12 High Voltage Battery Charging Unit Module BCU 150 9240236

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9163173

BMW E60 E61 LCi Right Left Rear Door Wiring Loom N/O/S 9120797

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6904165

BMW X5 E53 Front Dashboard Centre Console Lighter Wiring Loom Harness 6904165

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9270020

BMW F06 F12 F13 Front Wiring Loom PDC Harness Parking Sensor 9270020

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9110878

BMW E81 E87 E91 Switch Cluster Steering Column Cruise Control 9110878

PLN 664.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8581370-1

BMW F40 Mini Cooper F56 F57 F60 Bracket Control Unit Box Engine 8581370

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9149835

BMW X5 E70 Front Seat Control Unit Module Driver's Side 9149835

PLN 246.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7804127

BMW E60 E61 LCI 520d Cable Alternator Starter Base B 7804127

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9361589

BMW 2 F45 Active Tourer Door Wiring Loom Harness Cable Driver's Side 9361600

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8510221-1

BMW E90 E91 LCI E92 325d Diesel N57 204HP ECU Engine Kit DDE 8510221 CAS3 + Key

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8727997

BMW F44 Gran Coupe Door Wiring Harness Rear Door Right Left N/O/S 8727996

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9356156

External Ignition Base BMW F20 F30 F32 F33 Power Terminal Distribution 9356156

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9171900

BMW X5 E70 X6 E71 Computer Control Unit DVD Player RSE MID PLUS PL4 9171900

PLN 1,424.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3425833

BMW X3 E83 2.5i 3.0i M54 Wiring Harness Cable Engine Ignition Module 3412247

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6998487

Airbag Module Mini F55 F56 F60 BMW X1 F48 F45 ECU Control Unit Air Bag 6998487

PLN 567.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6974373-1

BMW E81 E84 E87 E88 E90 Ultra Sonic Module Alarm System 9149671

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6825538

Comfort Module Unit BMW F20 F21 F30 F31 F32 Body Control FEM ECU LR01 6825538

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7316536

BMW G30 G11 G12 Sunroof Sliding Roof Drive Unit Motor Actuator

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9222071

BMW F07 BCM Body Control Module Unit Controller 9222071

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8380407-1

BMW X5 E53 Power Distribution Fusebox Cover Fuse Box 8380407

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9362398

BMW F20 F21 F30 F31 F32 F45 Body Control Unit Module REM 9362398

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7464750

Tailgate Smart Opener BMW F10 F11 X1 F48 X3 F25 Control Unit Module 7464750

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7556880

Engine Wiring BMW Z4 E85 E86 Petrol N52 Loom Harness Module Manual 7556880

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9264973-1

BMW X5 E70 Seat Control Unit Module ECU 9264973

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9282285

BMW X3 F25 Central Gateway Module Control Unit ECU 9282285

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6926445

BMW 5 Series E60 E61 LCI Heated Front Seat Control Module 6926445 9182128

PLN 56.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6906347-1

BMW X5 E53 Rear Bumper PDC Plug Socket Loom Cable 6906347

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6997612

BMW F20 F21 Air Conditioning A/C Climate Control Unit Module ECU 6997612

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9325656

BMW F20 F21 F22 F30 F31 F32 Body Control Module Unit FEM ECU LR01 9325656

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9296981

Battery Cable Mini F55 F56 BMW X2 F39 Diesel B37 Positive Cable Wiring 9296981

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6864204

ICM Module BMW F20 F21 F30 F31 Control Unit 6864204

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8267406

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

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7419610-1

BMW F30 F31 LCI Headlight LED Module Insert Light Source Control Unit 7419610

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6934021

BMW 7 Series E65 E66 Front Left Right Door N/O/S Wiring Loom Harness 6920291

PLN 18.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6925942

BMW E60 E61 Cable Loom Door Wiring Harness 6925942

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9190110

BMW Z4 E89 Battery B+ Engine Compartment Terminal Point 9190110

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9338800

iDrive Control Unit BMW F10 F20 F30 Touch Controller Module ECU 9338800

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3414473

BMW X3 E83 Transmission DXC Transfer Box Wiring Cable Loom Harness 3414473

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8321087-1

BMW E60 Front Seat Height Adjustment Electric Motor Actuator 0390203234 8321087

PLN 37.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6960428

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

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1439740

BMW X5 E53 Cable Starter-Base B Electrical Cable Wiring 3.0i M54 Petrol 1439740

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 3420482

BMW X3 E83 Ground Earth Cable Battery Wiring 3420482

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8513250-3

BMW F10 F11 520d Diesel N47N 184HP Engine ECU Kit DDE 8513250 CAS4 Key Automatic

PLN 854.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6921980

BMW 7 Series E65 E66 Control Unit Door Rear Passenger Side

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6799083

Control Unit BMW F10 F11 X3 F25 Parking Brake Handbrake Module EMF 6799083

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9387266

FEM Module BMW F23 F36 Body Control Unit ECU LR01 9387266

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9261095

BMW 7 Series F01 F02 LCI Antenna Aerial Noise Suppression Filter 9261095

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9221825

BMW E70 E71 Car Infotainment Multimedia Computer Head Unit 9221825

PLN 1,424.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9148264

Seat Module BMW E87 E90 E91 E92 Control Unit ECU 9148264

PLN 85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9340522

BMW 5 F10 LCI Central Gateway Module ECU Control Unit LEAR ZGW-02 4SK 9340522

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8615581

BMW 3 F30 LCI 330e B48X Control Unit Bracket Holder Mount 8615581

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

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Showing 1981-2079 of 4791 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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