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. 6R0937085B

Volkswagen Polo 6R BCM Body Comfort Control Module Unit ECU 6R0937085B

€66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. AV6Q6M0

Ford Transit Connect Mk2 Glow Plug Wiring Harness Engine AV6Q6M0

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6C1T14A481CC

Ford Transit Mk7 Fuse Box Body Control Module ECU 6C1T14A481CC

€70.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8574093-5

BMW F10 F30 320d 520d 163HP Engine Control N47N ECU DDE 8574093 Automatic

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0971104AE

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104AE

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9226333-1

BMW E88 Cabrio ECU Body Control Module H3 Junction Box 9226333

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. AT1T-15T850-AA

Ford Transit Connect PDC Parking Aid Warning Control Module Unit AT1T-15T850-AA

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5M5T14B192CA

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO SET 5M5T14B192CA

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5M5T14B192EA

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO 5M5T14B192EA

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8610635-3

BMW F20 F30 F31 120i 320i N20 184HP Engine Control Unit ECU DME 8610635 Manual

€237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 079903805J

Audi A4 B6 B7 4.2 V8 FSI Alternator Bracket Mount Holder 079903805J

€51.95

Free delivery - Tue, Nov 25

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Part no. RHD-8T2035186Q

Audi S3 8V Multimedia MMI Radio Stereo Audio Head Unit CD Player 8T2035186Q

€32.95

Free delivery - Tue, Nov 25

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Part no. 5A243F5-1

Ultrasonic Sensor BMW F70 G60 U06 Rear Parking PDC Set Portimao Blue - C31

€132.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048708626

Mercedes W212 Media Interface Control Module Unit ECU A2048708626

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0919275-SHB

VW Golf Mk6 Audi TT 8J Parking Distance Control Sensor Shark Blue Metallic - A5Q

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1685453532-2

Mercedes W168 A140 ESP + HBA Electronic Stability Control Module A1685453532

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. D1BT14D212NA

Ford Transit Connect Mk2 II Bluetooth Control Module Unit ECU D1BT14D212NA

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218707386

Mercedes W221 Door Control Unit Module Right Rear O/S A2218707386

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0038206926

Mercedes W221 Door Control Module Unit ECU Rear Left N/S A0038206926

€47.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8507918

BMW F20 F21 N47S1 Engine Wiring Harness Injector Module Loom Cable 8507918

€104.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. DT1T14B321AG

Ford Transit Connect Mk2 II Air Module Control Unit ECU DT1T14B321AG

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. GV6T14A073DF

Ford Transit Connect Mk2 II Fuse Box Body Control Module GV6T14A073DF

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 028903025G

Volkswagen Polo 6N Alternator Generator BOSCH 14V 70A 028903025G

€61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7619143

BMW F20 F21 F30 F31 Valvetronic Servomodule Wiring Cable Loom Harness 7619143

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7P6907357A

Skoda Octavia 5E Front Lamp Headlight Range Control Module Unit ECU 7P6907357A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8C113C190AB

Ford Transit Mk7 Yaw Rate Speed Control Unit Sensor Meter 8C113C190AB

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5A243F5

BMW F70 G60 U06 Rear Ultrasonic Sensor Parking PDC Portimao Blue C31 5A243F5

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009003206

Mercedes W205 W222 Fuel Pump Module Control Unit A0009003206

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5A234D0

Wiring Cable BMW F06 F12 F13 Electric Parking Hand Brake Handbrake Cable 5A234D0

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5A410C5

BMW U06 iX I20 Headlight Headlamp Control Module Unit FLM2 Mid 5A410C5

€137.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5B4E028

Remote Control Receiver BMW F70 X5 G05 G60 U06 Mini F65 Radio Module 5B4E028

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1698207926

Mercedes W169 W245 Control Unit Front Left Door N/S Module A1698207926

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218705093

Mercedes W221 Door Control Module Unit ECU Rear Left Right N/O/S A2218705093

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 06E971627Q

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627Q

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 06E971627M

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627M

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 0AM911023N

Audi A3 8V 1.4 TFSI Petrol Starter Motor Engine Actuator Unit 0AM911023N

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0035223AP

Audi A4 S4 B8 Audio Amplifier Sound Booster Control Unit Module 8T0035223AP

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6R0971537N

Seat Ibiza 6J Battery Ground Line Earth Negative Cable Wiring 6R0971537N

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6C0959655J

Control Unit Seat Ibiza 6J VW Polo 6C 6R Air Module Unit ECU Bosch 6C0959655J

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8577238

BMW F30 F31 Sterter Motor Alternator Cable Wiring Loom Harness 8577238

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 02M911024S

VW Golf MK7 5G Audi A3 8V Engine Starter Motor Valeo 2.0 TDI Diesel 02M911024S

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K0907530G

Audi A3 8P Gateway Module Diagnostic Interface Control Unit ECU 1K0907530G

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0919275-SDA

Skoda Octavia 1Z PDC Parking Sensor 4H0919275 Anthracite Grey Metallic - F8J

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3C0919275S-CGR

Audi TT 8J PDC Parking Distance Sensor Control Condor Grey - Y7E 3C0919275S

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0024463140-4

Mercedes W169 A160 CDI 95HP M266.920 Engine ECU Kit A0024463140 Automatic

€222.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1648702726-1

Mercedes W164 Boot Trunk Lid Tailgate Control Unit Module ECU A1648702726

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4G8959792J

Audi A7 4G8 Door Control Module Front Passenger Side 4G8959792J

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1648205389

Mercedes ML W164 Aerial Antenna Amplifier Unit Module A1648205389

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009828523

Mercedes W164 Suspension Compressor Relay A0009828523

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7798034

BMW E60 E65 E87 E90 Starter Motor Engine 7798034

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959595M

Audi Q2 GA Front Door Module Control Unit Controller Passenger Side 5Q0959595M

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03C971612BR

Audi A1 8X 1.4 TSI Engine Wiring Loom Harnes 03C971612BR

€94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9381102

BMW F20 F30 F36 Front Electronic Module Control Unit FEM 9381102

€89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9381837

BMW X1 F48 Mini F55 F56 Air Module Control Unit ECU 9381837

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0971250Q

Audi A3 S3 8V Negative Battery Terminal Earth Cable Lead Wiring 5Q0971250Q

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0937125A

Fuse Relay Box Volkswagen Audi Skoda Seat Engine Bay Supply Unit 5Q0937125A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4E0035652E

Audi A6 C6 MMI Multimedia Sat Nav Navigation Control Head Unit 4E0035652E

€142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9387626-1

MINI Cooper One F55 F56 Rain / Light / Solar HUD Sensor Windshield 9387626

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0959793R

Audi A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K0971349GA

Volkswagen VW Golf Mk6 1.6 TDI Alternator Cable Wiring Harness Loom 1K0971349GA

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0035420219-3

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue A0035420219

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9317119

BMW F01 F02 F04 F25 Amplifier Unit Top Hifi Audio 9317119

€336.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1S0919275D-MRE

Audi A5 8T PDC Parking Distance Control Sensor 1S0919275D Misano Red Pearl - Z3M

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9382418

BMW F45 X1 F48 G30 Telematics Module Bluetooth Telephone Control Unit 9382418

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 80A962243

Audi Q7 4M Rear Hatch Boot Lid Tailgate Opening Control Module Unit 80A962243

€70.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4M0971104CB

Audi Q7 4M Rear Bumper PDC Parking Sensor Wiring Harness Loom 4M0971104CB

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0971104Q

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104Q

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0971365J

Audi A5 8T Seat Cable Front Wiring Loom Harness Left Right N/O/S 8T0971365J

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3C0907651

Volkswagen VW Golf Mk6 1K Acceleration Sensor 3C0907651

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5M0035724

Volkswagen VW Golf Mk6 1K Aux Socket Port Switch 5M0035724

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6926472

BMW E65 E66 E67 Phone Transmitter Receiver Module ECU SIEMENS 6926472

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8691838-1

Mini F54 F55 F57 B48 136HP Petrol Engine Control ECU Kit DME 8674258 Manual

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959793N

Audi Q5 8R Front Door Module Control Unit ECU Driver's Side 8K0959793N

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9810737980

Citroen Relay 35 L Fuel Pump Carrier Bracket Holder Housing 9810737980

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1644400837

Mercedes W164 Parking Sensor Wiring Loom Cable Harness Front PDC A1644400837

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129069900

Player Audio Mercedes C207 W212 Head Unit CD Media Radio Controller A2129069900

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 420919275-PHB1

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0035420219-2

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959754H

Audi A5 8T Remote Button Smart Key Fob Unit 8K0959754H

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6R0915181E

Audi A1 8X Battery Cable Loom Harness Wiring Negative Terminal 6R0915181E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03F906070GN-2

Audi A1 8X 1.2 TFSI CBZA 86HP Engine Control ECU Kit 03F906070GN Manual

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K1907115M

Audi A4 B8 A5 8T 1.8 TFSI CDHB 160HP Engine Control ECU 8K1907115M Automatic

€156.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8678967

Mini Cooper R56 Petrol Engine Installation Wiring Loom Harness 8678967

€47.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4752820

Positive Cable BMW F20 F21 Under Bonnet Battery Wiring Loom 4752820

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4M0959595N

Audi Q7 4M Rear Door Control Module Unit ECU Left Right N/O/S 4M0959595N

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0971104F

Audi A4 B8 Rear Wiring Loom PDC Harness Parking Sensor 8K0971104F

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4N0907063ME

Audi Q7 4M Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907063ME

€237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4KE959655H

Audi Q7 4M Air Module Control Unit ECU SRS Module Unit 4KE959655H

€156.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0907530AM

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

€28.95

Free delivery - Tue, Nov 25

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Part no. 9270495-1

BMW X5 E70 X6 E71 F10 F11 F12 Parking Sensor PDC Ultrasonic Black 9251944 SET X4

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8N8035223A

Audi TT 8N Amplifier BOSE Premium Audio Sound System Module 8N8035223A

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 09G927750CA

Audi TT 8N Automatic Gearbox Module Control Unit ECU 09G927750CA

€142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6857208

Parking Distance Assistant BMW 20 F21 F30 F31 F36 Control Unit Module 6857208

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7545150-1

BMW X5 E53 3.0i M54 231HP ECU Engine Kit DME 7545150 Automatic Key EWS

€165.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9364636

Body Domain Controller Mini F54 F55 F56 F60 ECU BDC Control Unit Module 9364636

€165.95

Free delivery - Tue, Nov 25

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0035421019-1

Mercedes C117 GLA X156 ML W166 W176 W246 Relay 5 Pins Yellow Set A0035421019

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6956750

BMW E87 Control Unit PDC Parking Sensor Module Nautikblau Blue - A21 6956750

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6394460132

Mercedes Vito Viano W639 Side Sliding Door Control Unit Module A6394460132

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

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Showing 397-495 of 11774 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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