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. A2139008730

Mercedes C253 W177 W205 W247 Gearbox Module Control ECU Automatic A2139008730

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9321022

BMW Mini Cooper F55 F56 F57 B Junction Terminal Box 300-400 W 9321022

PLN 84.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009005517

Mercedes W177 W205 W238 W257 Gearbox Control Unit Module ECU A0009005517

PLN 427.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8T0959793M

Audi A5 8T Front Door Control Module Left N/S Driver's Side Unit 8T0959793M

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6926433

BMW 1 3 Series E87 E90 E91 Mini R56 R57 Seat Control Unit Module Heating 6926433

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1779007403

Mercedes W177 Interior Ambiance Control Module ECU Unit A1779007403

PLN 227.95

Free delivery - Tue, Jan 13

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Part no. 8780776

Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav GPS Unit High 8780776

PLN 2,279.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9354290-1

BMW X1 F48 Pedestrian Protection Impact Crash Sensor Module PTS 9354290

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1698207326

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Front A1698207326

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6954130

BMW 1 3 Series E87 E90 E92 Front Seat Adjustment Switch Right O/S 6954130

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6945145

BMW E60 E61 E63 Air Control Module Passenger Side Door 6945145

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1729058300

Mercedes SLK R172 Pedestrian Protection Impact Crash Sensor Module A1729058300

PLN 142.95

Free delivery - Tue, Jan 13

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Part no. 9221861

BMW E90 E91 E93 LCI Front Left Right N/O/S Seat Control Module ECU 9221861

PLN 151.95

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Part no. 9139868-1

BMW X3 E83 LCI X5 E70 LCI PDC Parking Ultrasonic Sensor Black 9139868

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6950181

BMW E93 Aerial Antenna Amplifier Diversity Control Module 6950181 9187798

PLN 61.95

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If paid before 14:00

Part no. 6949382

BMW E65 E66 Rear Door Wiring Harness Loom Cable 6949382

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1779001704

Mercedes V177 Door Module Rear Right Control Unit A1779001704

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6963013

BMW 5 6 Series E60 E61 E63 Driver Side Door Airbag Control Unit Module 6963013

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A9065420518

Mercedes-Benz W639 W906 ESP Yaw Rotation Rate Sensor Control Unit A9065420518

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0951253A-2

Seat Skoda Audi VW Polo 6R Multi Use Control Relay 4 Pin 645 4H0951253A SET X3

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 2755518

Mini R55 R56 R57 Battery Tray Holder Mounting Bracket Housing Box 2755518

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7520912

BMW E60 E61 E63 E64 LCI Cover Electronic Box 7520912

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8Z0951253

Skoda Octavia II 5 Pin Black Relay Control Module Unit Set Kit 8Z0951253

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9286863

BMW X5 Z4 Series E70 E89 Active Sound Harman Becker Amplifier Design 9286863

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7801203

BMW X5 E70 E87 F10 F11 F15 F25 F30 Diesel Engine Starter Motor 7801203

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8709212

Body Control Module BMW F20 F30 F31 BCM Unit FEM Lear V12 ECU 8709212

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A4479000900

Mercedes Vito W447 Air Module Control Unit ECU 4479000900

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9259354

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

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9340998

BMW 1 2 Series F21 F22 Wiring Passenger Side Loom Front Door Left N/S 9340998

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9185474

Mini Cooper R60 R61 Antenna Aerial Diversity Trap Circuit 9185474

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7545142

BMW Z4 Series E85 N52 Roadster Cable Alternator Starter Base B+ 7545142

PLN 65.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2045400440

Battery Bracket Mercedes W204 W207 Battery Mount Support Holder A2045400440

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7823344

BMW F20 F21 F30 F31 F32 F33 Alternator Generator 150A N47N Diesel 8519890

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009050338

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050338

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9188877

BMW F01 F02 F03 F10 F11 Steering Column Adjuster Switch 9188877

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9662854180

Citroen C4 Starter Motor Diesel Engine 1.6 HDI Actuator Unit 9662854180

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9176194

Mini Cooper R57 R58 R59 Radio Aerial Antenna Amplifier FM 9176194

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6938975

BMW E60 E61 E63 E64 6-disc Compact CD Changer 6938975

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2128205026

Mercedes W212 Impact Crash Sensor Door Left Right A2128205026

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9257150

BMW F01 F02 F03 F10 F11 F20 F21 F30 F31 Bluetooth Module Combox Media 9257150

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1648207926

Mercedes ML W164 Air Module SRS Control Unit ECU A1648207926

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1718200726

Mercedes R171 SLK200 Module Front Door Left Control Module Unit A1718200726

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2229000013

Door Module Mercedes W205 X253 Front Door Right O/S Control Unit A2229000013

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8577241

BMW F30 F32 LCI 330d 335dX 430d 435dX Alternator Starter Cable B+ 8577241

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9377149

BMW 1 3 Series F20 F21 F30 F31 Telematic Control Unit Module 9377149

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9315150

BMW X3 F25 Front Distribution Box Fuse Box Power Control Unit 9315150

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9207075

BMW X3 X5 Series E83 E53 Telematics Control Unit Module 9207075

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8U0959655B

Audi Q3 8U Air Module Control Unit SRS System ECU 8U0959655B

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0025422619-2

Mercedes ML W163 Relay 4-Pin Grey Tyco Set Kit A0025422619

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9354228

Mini Cooper F56 Rain Light Turn On Sensor Unit 9354228

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009002218

Mercedes C253 Fuel Pump Module Control Unit ECU A0009002218

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2129004910

Radio Head Unit Mercedes W212 CD Audio Player Head Control Unit A2129004910

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9145350

BMW X3 E83 LCI EWS IV 4.4 Control Unit Module ECU 9145350

PLN 260.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6951079

BMW E60 525i 530i 545i Fuses Set Electrical Fuse 6951079 61146951079

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9866979

BMW F20 F21 F30 F31 Rear Electronic Module Fuse Box Control Unit V2 REM 9866979

PLN 170.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1695403945-1

Mercedes W169 W245 Central Gateway Control Unit Module ECU A1695403945

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7520902

BMW 3 5 E60 E90 E92 Carrier Bracket Holder Engine Control Module Unit 7520902

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9145401

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module

PLN 23.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0959592H

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

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9217033

Battery Cable BMW F01 F02 Positive Wiring Plus Pole Red 9217033

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0035421619-1

Mercedes W177 Relay 052 Fuse Box Relay Slot B D E 70A Tyco SET X2 A0035421619

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2479004411

Mercedes V177 W247 Windshield Camera Driver Assists Front Camera A2479004411

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9196937

BMW E93 Convertible Seat Control Unit Module ECU 9196937 FSV 7.14.0

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6905950

BMW X5 Series E53 Spoiler Dualband Antenna Amplifier Aerial 6905950

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0061514401

Starter Motor Mercedes W204 W211 W212 OM642 Diesel Engine A0061514401

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7800164

BMW F10 F11 N57 N57S Positive Battery Cable Alternator Starter Lead 7800164

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9115449

BMW X5 X6 E70 E71 Power Junction Box Positive Battery Cable Plus Pole 9115449

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1698702710

Mercedes-Benz A B Class W169 W245 Tow Protection ECO Switch Button Unit Module

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9807759

Mini Cooper R60 Wiring Passenger Loom Front Door Cables Left N/S 9809480

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1698208426

Mercedes-Benz A B W169 W245 Front Right Door O/S Control Unit Module A1698208426

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6781575-1

YAW Rate Sensor BMW E81 E87 E90 E91 Accelerator Speed Module 6781575

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0959593N

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

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9128569-1

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

PLN 32.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 1S0919275-DGR

Audi A5 8T Parking Sensor Control Module Daytona Grey Metallic - Z7S 1S0919275

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9805670-1

Mini R60 Countryman Window Lifter Motor Drive Front Right O/S Door 9804384

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0907651

Seat Leon Mk3 5F Front Crash Impact Sensor 5Q0907651

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8509722-2

Control Unit Box BMW F20 F21 F22 F30 F31 Cover Panel Protection 8509722

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F9035225AA

Audi A6 C6 Antenna Amplifier Control Unit Module 4F9035225AA

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8583091

BMW X5 E70 G11 Integrated Supply Module Ecu Control Unit 8583091

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1645400436

Mercedes ML164 Alternator Wiring Starter Motor Harness OM642 A1645400436

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9227118

BMW F07 GT On Board Central Information Display Screen Monitor 10,25" 9227118

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7591534-1

Control Unit BMW F01 F10 F20 F21 F30 F87 Integrated Supply Module Unit 7591534

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6915327-1

BMW E46 E60 E81 E87 E90 E91 F10 F20 F30 2x Relay Make Contact Sky Blue 6915327

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2049012704

Mercedes W204 ECU Control Unit Crash Impact Sensor Air Module A2049012704

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009006612

Rear Module Mercedes C205 W205 Fuel Pump Control Unit A0009006612

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G2971228DQ

Audi A6 A7 4G 3.0 TDI Starter Alternator Wiring Harness 4G2971228DQ

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2059005222

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

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8622032

BMW F20 F21 F30 F31 LCI Control Unit Box Cover Mudguard Flap Cap 8622032

PLN 51.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9308292

BMW 3 Series F30 F31 Battery Cable Wire Lead Positive Underfloor 9259326

PLN 617.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2139002210

Mercedes-Benz W176 W205 W207 W213 Bluetooth Control Unit Module ECU A2139002210

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7808074

BMW E70 LCI F10 Alternator Generator Engine 180A Valeo N57 Diesel 7803724

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6799887

Crash Module BMW F01 F02 LCI F10 F11 F13 ICM Control Unit ECU 6799887

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6R0971349AM

Volkswagen Polo Mk5 V 6R Battery Cable Alternator Starter 6R0971349AM

PLN 94.95

Free delivery - Tue, Jan 13

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Part no. 9231283-IBB

PDC Parking Sensor BMW X5 E70 F10 Ultrasonic Sensor Imperial Blue A899231283

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6910542-1

BMW E46 X3 E83 Battery Cable Plus Pole Power Positive Wiring 6910542

PLN 94.95

Free delivery - Tue, Jan 13

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Part no. 9220695

BMW X5 X6 E70 E71 Control Unit Module Top Rear Side View Camera 9220695

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0959795P

Audi A6 C6 Rear Left N/S Door Lock Control Module Unit ECU 4F0959795P

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

...

Showing 892-990 of 12186 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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