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. A2189015200

Mercedes X218 Air Module Control Unit ECU Module A2189015200

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907658B

Audi A3 8V A5 A6 A7 Air Quality Sensor Unit 4H0907658B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2189002002

Mercedes X218 CLS350 Automatic Trunk Lid Clossing Control Module A2189002002

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2189000104

Mercedes CLS X218 Parktronic PDC Parking Assist Control Module A2189000104

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2189058500

Mercedes CLS X218 Antenna Amplifier Rear Aerial Control Module A2189058500

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2128270228-ING

Mercedes W212 Estate Roof Antenna Cover Shark Indium Grey Metallic A2128270228

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1729001906

Mercedes X218 CLS350 Communication Bluetooth Control Module A1729001906

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129008816

Mercedes X218 Radio Comand Navigation Seat Control Unit Module A2129008816

€256.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7852630

Differential Lock Module BMW F10 M5 F80 M3 Rear Axle Control Unit ECU 7852630

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9352786

BMW F33 F83 M4 Convertible Folding Top Roof ECU Module Control Unit CTM 9352786

€75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA959354

VW Volkswagen Golf Mk8 Air Module Control Unit Crash Impact Sensor 5WA959354

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959592L

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7601799

Earth Ground Cable BMW X3 F25 Battery Cable Engine Wiring 7601799

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA980653D

Volkswagen Golf CD1 Camera Lane Assist Control ECU Module Unit 5WA980653D

€89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA959436P

Volkswagen Golf CD1 Keyless Go Module ECU Entry Control Unit 5WA959436P

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA907007AC

Volkswagen Golf Mk8 Air Conditioning A/C Control Unit Module 5WA907007AB

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0955559C

Volkswagen Golf 8 Rain Sensor Front Windscreen 5Q0955559C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959392B

Audi A3 S3 8V Door Control Module Front Passenger Side Left N/S 5Q0959392B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 0AM911022C

Volkswagen Golf Mk8 Engine Starter Motor Assembly Unit 0AM911022C

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5H0971104P

Volkswagen Golf Mk8 CD1 Parking Sensor Wiring Rear Bumper Loom Cable 5H0971104P

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5QA919283A

Audi A3 S3 8V VW Golf 7 Seat Leon 3 Parking Assist PDC Control Module 5QA919283A

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0971104

Audi A3 S3 8V Sportback Wiring Harness PDC Parking Sensor Rear Bumper 8V0971104

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4M0035507

Audi A3 8V A4 B9 Telephone Antenna Amplifier Module Unit Booster 4M0035507

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7PP941572AC

Audi A5 F5 Xenon Headlight Resistor Ballast Relay Module Unit 7PP941572AC

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA962132

Volkswagen Golf Mk8 Antenna Amplifier Transmitter Receiver Module ECU 5WA962132

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA915343B

Battery Bracket VW Golf 8 CD1 Audi A3 8Y Battery Clamp Holder 5WA915343B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0951605B

Audi Seat Skoda Volkswagen Golf Mk8 Anti Theft Alarm Siren 5Q0951605B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5H0971385F

Volkswagen Golf Mk8 CD1 Rear Seat Couch Wiring Harness Cable Loom 5H0971385F

€70.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5H0963554

Volkswagen Golf Mk8 Rear Seat Bench Couch Occupancy Sensor Unit 5H0963554

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8583423-5

Mini Cooper D R60 R61 ALL4 N47N 2.0 143HP Engine ECU DDE 8583423 Automatic

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6R0971839A

VW Volkswagen Polo 6R 1.2 TSI Petrol Fuel Sender Pump Cover Panel 6R0971839A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 0AD927755BE

VW Volkswagen Touareg 7L Transfer Box Control Unit Module ECU 0AD927755BE

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7428425-3

Headlight Module BMW F20 F21 LCI Front Lamp Hedlamp LED Control Unit 7428425

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K3959857B

Volkswagen Polo 6R Golf Mk6 3-Door Window Lifter Switch Driver's Side 1K3959857A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7822015

BMW G20 G21 G26 330d 430d B57P Diesel Starter Cable Wiring B+ 7822015

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5A923C4

BMW F40 G20 G21 G30 G31 X3 G01 HiFi Audio Sound Amplifier RAM Module 5A923C4

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K5907357

Audi A4 B8 Headlight Headlamp Range Control Unit Module 8K5907357

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1J6035111

VW Volkswagen Touareg 7L Golf 4 CD Changer 1J6035111

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907472

Audi A4 B8 Headlight Headlamp LED Module Control Unit 8K0907472

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7L0907719A

Volkswagen Touareg Anti Theft Alarm System Control Module Unit ECU 7L0907719A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5J0919506

Seat Ibiza 6J 1.2 TSI CBZB Radiator Fan Relay Module Control Unit ECU 5J0919506

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7L0909606D

Volkswagen Touareg 7L Front Impact Crash Sensor Right Left N/O/S 7L0909606D

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 09D927750EE

VW Volkswagen Touareg 7L Automatic Gearbox Module Control Unit ECU 09D927750EE

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6395460035

Mercedes Vito W447 W639 Battery Terminal Protection Cap Cover A6395460035

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9259581

BMW X3 F25 Map Card Fuse Box Grouping Diagram 9259581

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K0906093H

Seat Ibiza 6J 1.2 TSI Petrol Fuel Pump Control Unit Relay 1K0906093H

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0959792G

Audi A4 B8 Front Door Lock System Module Right O/S Control Unit ECU 8T0959792B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218708326

Mercedes W221 Rear View Backup Camera Control Unit Module A2218708326

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218705687

Mercedes W221 Linguatronic Control Module Unit ECU English Version A2218705687

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9389069

BMW F20 F21 F30 F31 F32 X5 F15 X6 F16 Power Distribution Fuse Box Front 9389069

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0959795H

Audi A4 B8 Door Control Module Unit ECU Rear Left Right N/O/S 8T0959795H

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0035415B

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

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0959793G

Audi A4 B8 Door Module Front Left N/S Control Unit ECU 8T0959793G

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907063BE

Audi A4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907063K

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5A4A1E1

Kafas Camera BMW G20 G30 G28 G80 F40 F44 Front Assist Camera Module 5A4A1E1

€170.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959655L

Audi A4 B8 Air Module Control Unit ECU Crash Control 8K0959655L

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0005400502

Mercedes W212 W221 W447 W906 Adblue Injector Wiring Cable Loom A0005400502

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9805533-1

Mini R60 Rear PDC Parking Sensor Royal Grey Metallic - A48 9805533 SET x2

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9261614-1

BMW F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Glacier A83 Silver Set

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9111165-PB2

PDC Sensor BMW E81 E82 E87 E88 E90 E91 Ultrasonic Parking SET X4 Platinbronze

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L906018JR-1

Audi A4 B8 2.0 TDI CJCB Engine Control Unit Module ECU Kit 03L906018JR Manual

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1H0953227

Audi Seat Volkswagen Polo 6N Turn Signal Hazard Light Relay 191 1H0953227

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0951253C

Seat Skoda Audi VW Polo 6R Multi Use Control Module Relay 4 Pin 646 4H0951253C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0951253A

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6956744-1

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9231280-TS

BMW F07 Parking Module PDC Distance Control Unit Sensor Titan Silver - 354

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8631634

BMW X5 F15 Earth Ground Cable Negative Battery Lead Wiring 8631634

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7577068-2

BMW E90 E91 E92 N52N 325i 218HP Engine ECU Kit DME 7577068 CAS3 Key Automatic

€427.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3AA919041

VW Sharan 7N Voltage Stabilizer Converter Electric Control Unit Module 3AA919041

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5N0035342G

VW Volskwagen Polo 6R Multimedia Electronic ECU Control Unit Module 5N0035342G

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6R0959655K

VW Volkswagen Polo 6R Air Module Bag Control Unit 6R0959655K

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2749000800-5

Mercedes W205 C200 274.920 184HP Engine ECU Kit A2749000800 Key Lock Automatic

€251.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2229005415

Mercedes W205 W213 W222 Comunication Module Telematic Bluetooth A2229005415

€75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8585380-1

BMW F30 330d F32 430d N57N 258HP Control Unit ECU Kit DDE 8585380 FEM Key

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0955557A

Audi A6 C6 Door Crash Impact Sensor Front Left Right N/O/S 4F0955557A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959793E

VW Volkswagen Tiguan 5N Front Right O/S Door ECU Module Control Unit 4F0959793E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0971765

Audi A6 C6 Wing Mirror Adjustment Switch Wiring Loom Cable 4F0971765

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F1971687S

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971687S

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959795E

Audi A6 C6 Rear Door Left N/S Module Unit Control ECU 4F0959795E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959792E

Audi A6 C6 Front Passenger Side Door Left N/S Module Unit Control ECU 4F0959792E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959794E

Audi A6 C6 Rear Door Right O/S Module Unit Control ECU 4F0959794E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7638005

BMW F20 F30 F32 Earth Ground Cable Negative Battery Lead Wiring 7638005

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1031550435

Mercedes W124 M103 Bracket Alternator Mount Holder Support A1031550435

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959651

Audi A6 C6 Front Impact Sensor Safety Crash Detection Module Unit 4F0959651

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F9035225AA

Audi A6 C6 Antenna Amplifier Control Unit Module 4F9035225AA

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 038907281B

Audi A6 C6 2.0 TDI Glow Plug Relay Unit Control Module 038907281B

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0035056B

Audi A6 C6 Head Unit Radio CD Player Control Unit Module 4F0035056B

€222.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F1971687AL

Audi A6 C6 Rear Left N/S Door Harness Cable Loom 4F1971687AL

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0121542002

Mercedes W903 OM611 Diesel Alternator Engine Generator 14V 90A A0121542002

€108.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959792T

Audi A6 C6 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959795P

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8634246

Mini F54 F60 B42 B46 B48 Ignition Injection Valve Wiring Harness Loom 8634246

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L906022FL

Audi A6 C6 3.0 TDI 233HP Diesel Engine Control Unit ECU Kit Module 03L906022FL

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0959655E

Audi A6 C6 SRS Crash Air Module Safety ECU Unit Control 4F0959655E

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0907637A

Audi A6 C6 Yaw ESP Rate Sensor Module Unit Control ECU 4F0907637A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8P0035785

Audi A3 8P MMI Multimedia Interface Unit Module Control ECU 8P0035785

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4E0035654A

Audi A6 C6 MMI Multimedia Navigation Control Head Unit 4E0035654A

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959651

Audi A5 Q7 A6 Front Crash Impact Sensor Control Unit 4L0959651

€47.95

Free delivery - Tue, Nov 25

If paid before 14:00

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Showing 1387-1485 of 11783 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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