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. 9138440

BMW 5 Series E60 E61 CCC CD Professional Navigation System Controller 9138440

PLN 1,899.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9861558-1

Rain Sensor BMW F20 F21 F30 F31 Windscreen Light Solar Condensation Unit 9861558

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1724740

BMW E36 E39 E46 Engine Starter Electrical Earth Cable 1724740

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6925945

BMW 5 Series E60 E61 Rear Left Right Door N/O/S Wiring Cable Harness Loom

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9264923

BMW F01 F02 F10 F11 F13 Power Distribution Fuse Box Rear 9264923

PLN 56.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9335298

BMW 1 Series F20 Front Left Door N/S Wiring Loom Harness Cables 9215715

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3453247

BMW X3 E83 E90 Engine Automatic Gearbox Module Wiring Cable Loom Harness 3453247

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9232063

BMW F30 Control Module Sensor 9232063

PLN 74.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6956748

BMW E87 E90 E91 LCI PDC Ultrasonic Parking Sensor Tiefgruen Green A43 6956748

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9798427

BMW F87 LCI M2 Competition S55 411HP Engine Control Unit ECU DME 9798427

PLN 1,329.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9362848

BMW 1 3 Series F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module

PLN 275.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9228495

BMW F07 GT ECU Body Control Module Junction Box V12 PL2 JBBFE III 9228495

PLN 127.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6960259

BMW 1 3 SERIES E81 E82 E87 E90 E91 E92 E93 Flat Cable Wiring Wire CAS Start Stop

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6982652

BMW 1 Series E82 E88 Positive Battery Lead Cable Wire 61126982652 6982652

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8676222

BMW 3 F30 LCI Hybrid 330e Battery Starter Connecting Lead Cable Wiring 8676222

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7615305

Engine Wiring BMW F20 F21 F30 F31 N13 Loom Module Harness Cable 7615305

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9299335

BMW F01 F02 F07 F10 F11 CAS4 Control Unit Key Reading Module 9299335

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9248298

BMW E88 E93 LCI ECU Control Unit Air Module 9248298

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9276016

BMW F11 Aerial Antenna Amplifier Diversity 868 MHZ 9276016

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7521116

Starter BMW E90 Petrol N52 N53 Engine Starter Motor Unit 7521116

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 2622341

BMW 2 3 5 Series F10 F22 F30 F32 Antenna Amplifier Module Trap Circuit 2622341

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7191718

BMW Z4 Series E89 Roadster Cabrio Horn High Tone 7191718

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9136726-2

BMW Mini Cooper R55 R56 Multifuse B Battery Power Distributor Cable 9136726

PLN 18.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7586426

BMW E89 F10 F25 F26 Battery Clamp Bracket Holder 7586426

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. 9119058

BMW E81 E87 E90 E91 Airbag Control Unit ECU NO CRASH DATA 9119058

PLN 66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9193745

BMW 3 5 E60 E61 E90 LCI Display Screen 8.8" Monitor Sat Nav 9193745

PLN 378.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7540369

BMW E46 N46 Wiring Harness Engine Gearbox Module Loom Cable 7540369

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8510221

BMW E90 E91 LCI E92 330d Diesel N57 Engine Control Unit DDE 8510221 Automatic

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6826326

BMW F40 G05 G20 G30 Shark Roof Fin Antenna Aerial Module Unit 6826326

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9264573-2

BMW X1 E84 ECU Body Control Module Unit Junction Box H2 PL2RR JBBFE IIIR 9264573

PLN 122.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6941503

BMW X5 Series E53 Cable Harness Door Front Right Left N/O/S 6941503

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9171948

BMW X5 X6 E70 E71 Air Module Control ECU Unit Module 9171948 0285010250

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9289385

BMW F10 F34 GT Telematics Module Bluetooth Telematik Control Unit 9289385

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7550468-3

BMW E81 E87 LCI E90 E91 Petrol N43 Alternator Generator 170A Denso 7550468

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7605061

Alternator Generator BMW F10 F30 N20 Diesel Electrical Unit Denso 210A 7605061

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7542615

BMW 1 3 5 6 7 Z4 Series E87 E90 E60 E64 E65 E85 Power Distribution Box 7542615

PLN 42.95

Delivery - Tue, Jan 13

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. 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. 9138969

BMW E60 LCI E61 LCI Electronic Driver Circuit Centre Console 9138969

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9227766

BMW F11 Touring Tailgate Spoiler Probe AM/FM Sensor 9227766

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9218702

Rain Sensor BMW F10 F11 Light Solar Fogging Control Unit 9218702

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6820234

Air Conditioning Module BMW F20 F21 F30 F31 A/C Control Unit 6820234

PLN 61.95

Free 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. 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. 6951674-CAR

BMW E81 E87 E90 PDC Parking Sensor Ultrasonic Carbonschwarz Black

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6952914

Wiring Loom BMW E65 E66 Cables Rear Bumper PDC 6952914

PLN 61.95

Free 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. 9322690

BMW F32 F82 M4 Hifi Audio Sound System Speaker AMP Amplifier Module 9322690

PLN 621.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6986077

BMW E81 E87 E90 E91 E92 6-disc CD Changer Without Magazine 6986077

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9231175

Diversity Antenna Amplifier BMW F30 F32 Rear Window DAB Module Unit 9231175

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 130002613-1

BMW 5 X5 7 Series E60 E61 E65 E70 Longitudinal Seat Adjusment Drive Motor

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9181453

BMW 1 X4 X5 Series F20 F21 F25 F26 Antenna Aerial Diversity Trap Circuit 9181453

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9390835

Sound Amplifier BMW X5 F15 X6 F16 Active Harman Becker Design 9390835

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7599881-1

BMW E87 LCI E90 E91 118i 318i Petrol N43 143HP ECU KIT DME 7599881 CAS3 + Key

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9118101

BMW 1 Series E81 E82 Driver Side Offside O/S Door Wiring Loom Harness 9118101

PLN 46.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9254025

BMW 5 7 X3 X5 X6 Series F10 F11 E70 E71 F01 F02 F25 Rain Light Solar Sensor

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8514577

BMW X3 F25 Diesel N47N Engine Gearbox Wiring Loom Harness 8514577

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9113348

BMW E81 E87 LCI E90 E91 DC/DC Wandler Torque Converter Module 9113348

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8507893

BMW 1 2 3 Series F20 F21 F22 F30 F31 N47N Wiring Loom Harness Engine 8507893

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9200503

BMW E60 LCI F01 F07 F10 ECU USB Hub Control Unit Module 9200503

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9470037

Differential Locking Module BMW F40 F48 Rear Axle Control Unit ECU 9470037

PLN 237.95

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. 7841705

BMW E60 M5 E63 E64 M6 V10 S85 Hall Sensor 7836160

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6946393

BMW E60 Hands Free Electronics Charging MULF 6946393 84216946393

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9286171

BMW F20 Front Right O/S Wiring Loom Harness Door O/S 9251711

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8682893

BMW F20 F30 LCI 120i 320i 330i B48 Engine Wiring Cable Loom Harness 8644504

PLN 341.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6859714-1

BMW X5 E70 X6 E71 Air Suspension Supply Compressor Valve Control Unit 6859714

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6809316

BMW F10 F20 F23 F30 Telematics Module Bluetooth Communications Control 6809316

PLN 389.95

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. 9200944

BMW 3 X1 E84 E91 Ultra Sonic Burglar Alarm System Sensor Module 9200944

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9181454

BMW X1 E84 Aerial Antenna Noise Suppression Filter 9181454

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7504737

BMW 5 X5 Series E39 E53 Petrol M62 Engine Starter Motor Adapter Cable 7504737

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8585729

BMW 3 Series F30 320d N47N Engine Gearbox Module Wiring Loom Harness Cables Set

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8632554

Fuse Box Cover BMW X3 G01 X4 G02 Trim Panel Lid Housing Bracket 8632554

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9259469

BMW X3 F25 Fuse Box Power Distribution Control Unit Module Rear 9259469

PLN 46.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7798482

BMW E60 E61 Battery Alternator Cable Lead For Preheater System 7798482

PLN 47.95

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. 7525696

BMW X5 E53 Ground Battery Cable Alternator Starter 7525696

PLN 66.95

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. 6934011

BMW 7 Series E65 E66 Cable Harness Loom Front Door Wiring Left N/S 6934010

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9147618

BMW X5 E70 Navigation System CCC CD Player Sat Nav Head Unit 9147618

PLN 1,234.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7791352

BMW X5 Series E53 3.0d M57N Cable Starter Base B 7791352 12427791352

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6931987

BMW 7 Series E65 E66 E67 Control Unit Voice Input System Module 6931987

PLN 55.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8626086

Alternator Motor BMW F20 F21 LCI B37 Diesel Engine Alternator 180A 8626086

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7801173-1

BMW X5 X6 E70 E71 M57N2 Alternator Generator 180A VALEO 7801173

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9285504

Distributor BMW X5 F15 X6 F16 B + Battery Power Distributor 9285504

PLN 42.95

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. 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. 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. 6928461

BMW E46 E60 E61 E63 E81 E87 E90 E91 X3 E83 X5 E53 E70 Bluetooth Antenna 6928461

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8571357

BMW G11 G12 G20 G21 G30 G31 F33 F36 Generator Alternator 180A Bosch 8571357

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9196938

BMW E93 Seat Control Module Unit ECU 9148266

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9267214

BMW F20 F21 F22 F30 F31 F32 F33 F34 Air Control Unit Module ECU 9267214

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9462544

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 9462544

PLN 75.95

Free 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. 6970890

BMW 7 Series E65 E66 E67 Sensor B-pillar Left Airbag N/S 6970890

PLN 28.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9211494

BMW E88 Cabrio Convertible Folding Top Roof ECU Module CVM6 9211494

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9143439

BMW E81 E87 E90 E91 E92 6-disc CD Changer without Magazine 9143439

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

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Showing 496-594 of 4792 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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