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. 9474776

KaFAS Camera BMW F10 F20 LCI F30 Mini F55 F56 Control Unit ECU Module 9474776

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9221109-2

BMW E60 Body Gateway Module Control Unit KGM E6X High D-Can Lear 9221109

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6950364

BMW E65 E66 Front Right Door O/S Wiring Harness Carrier 6950364

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9227172

BMW X6 Series E71 ECU Body Control Module Junction Box PL4 9227172 61359227172

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6867168

BMW 1 2 Series F20 F21 F30 F31 N13 N47N ECU ICM Control Unit Module 6867168

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6798937

BMW F11 Touring Air Suspension Control Unit ECU Rear Axle Module 6798937

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6857262

Air Module BMW F01 F02 LCI F10 F11 F13 ICM SRS Control Unit ECU Bosch 6857262

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6956750

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

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3417160

BMW X3 E83 LCI Cable Alternator Starter Base B 3417160

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9282424

BMW 3 5 Series F10 F30 Control Unit Module Top Rear Side View Camera 9282424

PLN 712.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7583225-11

BMW E87 LCI E90 118i 318i N43 143HP ECU Control Kit DME 7583225 Automatic

PLN 1,139.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6972064

BMW 1 3 X1 SERIES E81 E87 E90 E91 E92 Ultra Sonic Module Alarm System 6972064

PLN 18.95

Delivery - Tue, Jan 13

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Part no. 5A2D553

Audio Receiver BMW F40 G22 G30 G31 X3 G01 DAB ECE Control Unit Module 5A2D553

PLN 759.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9226885

BMW F20 F21 Aerial Antenna Amplifier Diversity DAB 9226885

PLN 85.95

Free delivery - Tue, Jan 13

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Part no. 9139899

BMW F07 F10 LCI F06 F12 F13 MMI Multimedia CD Player Reader Head Unit 9139899

PLN 398.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8607569

BMW X5 F15 40eX N20 Hybrid Starter Motor Automatic Transmission 8607569

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7810860-1

BMW 3 Series E90 E91 E92 E93 LCI N47N Engine Alternator Starter Cable B 7810860

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6821407

High Voltage Cable BMW F45 Mini F60 Hybrid Harnes EDH 6821407

PLN 142.95

Free delivery - Tue, Jan 13

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Part no. 8355056

BMW 5 X5 Series E53 Fuel Tank Flap Actuator 8355056

PLN 47.95

Delivery - Tue, Jan 13

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Part no. 6953424-3

BMW Z4 E85 E86 Positive Battery Cable Plus Pole Lead 6953424

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9247467

BMW E82 ECU Body Control Module Unit PL2RR JBBFE L1 61359247467 9247467

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 9153418-2

BMW F10 F11 B Plus Distributor Box Front Battery Cable Unit 9153418

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 8368932

BMW E39 Alarm Sensor Comfort Control Module Unit ECU 55892110

PLN 100.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8576333-2

Engine Unit ECU BMW F20 F30 F32 120dX 320dX 420dX N47N 184HP DDE 8576333 Manual

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9474810

Air Module BMW G30 G31 X3 G01 X4 G02 SRS Control Unit ECU 9474810

PLN 188.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6935597-TS1

BMW E81 E87 Front Rear Parking Sensor PDC Titansilber Silver 354 6935597

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8512499

Engine Control Unit BMW E81 E87 E90 E91 LCI N47 Diesel ECU DDE 8512499

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9271216

BMW X3 F25 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9271216

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7555188

BMW 5 6 Series F10 F11 F12 F13 Control Unit Box Cover 7555155

PLN 37.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9377150

BMW 1 Series F20 Bluetooth Control Module Unit TCB ECE 9377150

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8510832

BMW E90 E91 LCI N47N 318d 143HP Engine Control Unit ECU DDE 8510832 Automatic

PLN 617.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6866986

BMW F01 F02 LCI F06 F10 F11 F13 ECU ICM Control Unit Module Airbag 6866986

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7809196

BMW X3 E83 LCI 2.0d N47 177HP Engine ECU Control Unit Module DDE 7809196 Manual

PLN 664.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9243896-1

Central Information Display BMW F10 F11 LCI Boardmonitor Screen 7" 9243896

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 9177195

BMW E65 E66 X5 E70 X6 E71 Video TV Tuner Module Control Unit ECU 9177195

PLN 1,044.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6812250

BMW X1 F48 Door Wiring Loom Harness Cable Front Passenger Side N/O/S 6812250

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8506374-6

BMW E60 E87 E90 120d 177 HP N47 ECU Engine Control Unit DDE 8506374 Manual

PLN 427.95

Free delivery - Tue, Jan 13

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Part no. 9368387

BMW F07 F10 F11 X6 F16 Rear Cabin Entertainment Audio CD DVD Player 9368387

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9296780

BMW F20 F21 F30 F31 Control Unit Air Conditioning Module 9296780

PLN 55.95

Delivery - Tue, Jan 13

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Part no. 9159332

BMW F01 F10 F11 Heater Fan Blower Unit Motor Wiring Cable Harness 9159332

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7809999-3

BMW X3 E83 LCI 1.8sd 2.0sd N47 177HP Engine Control Unit ECU DDE 7809999 Manual

PLN 664.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7558911

BMW 1 Series E81 E82 E87N E88 NOx Cable Wiring Petrol 7558911 12517558911

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6957759

BMW E60 E61 E63 Driver Side Door Air Module Control Unit Module 6957759

PLN 85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5A19AC3

BMW F40 ACSM5 Control Unit Air Module ECU Control Module 5A19AC3

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7805349-1

BMW X3 Series E83 LCI M47N2 2.0d 150HP ECU Kit DDE + EWS4 + Key 7805349 Manual

PLN 948.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9302937

BMW F01 LCI Cable Door Rear Left Right N/O/S Wiring Harness 9262882

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6905639

BMW E65 E66 Japan Mobile Phone Buffer Module ECU J-buf 6905639

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9165623

BMW X5 X6 Series E70 E71 Airbag Control ECU Unit Module 9165623

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9114215

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

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9244429

BMW X6 Series E71 Rear Bumper PDC Cables Wiring Loom Set 9244429

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1722094

Battery Cable BMW E36 E46 M43 M57 Starter Alternator Wiring Harness 1722094

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6832924

BMW 4 Series F33 F83 M4 Switch Folding Top Sliding Up Down Roof 9366374

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9225619

BMW F10 Electronic Front Seat Memory Module Control Unit ECU 9225619

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9227181

BMW E90 LCI Body Control Module H1 PL2RR JBBFE IIIR 61359227181 9227181

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9241331

BMW X1 E84 USB AUX-IN Socket Plug 9241331

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 2622892

BMW 1 2 Series F20 F21 F22 F23 Control Unit Module Active Sound Design 2622892

PLN 739.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9319918

Adapter Lead Wire BMW F45 F46 X1 F48 Cable Active Air Flap Control 9319918

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8585933

Wiring Loom Harness BMW F20 F30 F36 LCI B47 Engine Gearbox Module 8585933

PLN 522.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8514291

Battery Cable BMW X3 F25 X4 F26 B47 Alternator Starter Base B Cable 8514291

PLN 161.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9267200-1

BMW E92 ECU Body Control Module Junction Box L1 PL2RR JBBFE 9267200

PLN 170.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9234424

BMW F10 F11 Fuse Box Power Distribution Control Unit Box Rear 9234424

PLN 66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7195197

BMW E88 Convertible Folding Top Roof ECU Module CVM Bracket Holder Mount 7195197

PLN 85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6970908

BMW E65 E66 Sensor Front Right Door Airbag O/S 6970908

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7624617-1

BMW F20 F21 F30 F31 F32 Cable Alternator Starter Base B 7624617

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9385026-1

BMW F01 F07 LCI F10 F11 F25 Air Module Control Unit ECU 9385026

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5A57FC8

BMW F20 F21 F22 F30 X3 F25 M Sport Radio Remote Key Fob Control 868 Mhz 5A57FC8

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9229875

BMW 3 Series E90 LCI Body Control Module H1 PL2RR JBBFE IIIR 61359229875 9229875

PLN 141.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9301522

BMW F01 F02 F07 F10 F11 CAS4 Control Unit Key Reading Module 9301522

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9125237

CD Changer BMW X5 E70 X6 E71 Mini R55 R56 R57 6 Disc Changer Unit 9125237

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7188557

BMW F10 S63N Control Unit Fuel Pump 7188557

PLN 1,424.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7622995

Cable Alternator Starter BMW F20 F21 F30 F31 N55 Battery Wiring Harness 7622995

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9153802

BMW X5 E70 Footwell Light Module Control Unit ECU FRM II NSW Lear 9153802

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9286113

BMW F20 F21 F22 F30 F32 FEM Module ECU Control Unit Fuse Box 9286113

PLN 237.95

Free delivery - Tue, Jan 13

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Part no. 9144260

BMW F01 F02 F20 F21 Interior Antenna Aerial Convenience Comfort Access 9144260

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6972065

BMW E91 Touring Ultra Sonic Burglar Alarm System Sensor Module 6972065

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6925715

BMW 1 3 Series E81 E82 E87 E90 E91 E92 Positive Battery Terminal Cover 6925715

PLN 47.95

Delivery - Tue, Jan 13

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Part no. 7243564

BMW F20 F30 Front Sport Seat Backrest Heating Mat Element 7243564

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8506281-5

BMW E87 E90 LCI 116d 316d Diesel N47 ECU KIT Engine DDE 8506281 CAS3 Key Manual

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6933270

BMW 7 Series E65 E66 E67 Control Unit Door Rear Driver Side 6933270

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8678976

Engine Wiring Mini F56 BMW F40 Petrol B38C Valvetronic Servo Motor Harness

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9267085

Antenna Amplifier BMW F01 F10 F13 Aeral Diversity 868 MHZ Control Unit 9267085

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7446712

BMW F23 Cabrio Convertible Folding Top Roof ECU Control Unit CVM Module 7446712

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7638194

BMW F20 F21 F22 F30 F31 Engine Starter Motor N20 N26 N55 Petrol 7638194

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9207515

BMW X1 E84 Battery Cable Wire Lead Positive 9207515 61129207515

PLN 427.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7843349

BMW F10 F11 LCI M5 F06 F13 M6 S63N Cable Alternator Starter Base B+ 7843349

PLN 151.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6837092

BMW G30 G12 Fuse Relay Box Rear Trunk Power Distribution B + Box Basis 6837092

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7806976-6

BMW E70 E71 3.0d M57N2 235HP Engine Control ECU KIT DDE 7806976 CAS3 Key

PLN 1,234.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8512499-2

BMW 1 3 Series E87 E90 LCI N47 116d 316d Diesel ECU Kit DDE 8512499 CAS 3 Key

PLN 427.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9259831

BMW E93 Convertible Wiring Loom Front Door Cables Cable Passenger Side 9186668

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8509910

BMW X3 F25 X4 F26 Engine Electronics Control Unit Box Cover Trim 8509910

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 9274570

BMW F20 Head Unit Navigation GPS Sat Nav Infotainment DAB High F10 F30 9274570

PLN 759.95

Free delivery - Tue, Jan 13

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Part no. 6842527

BMW G20 Battery Terminal Voltage Distribution Box 400W MID 6842527

PLN 132.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9241974

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9241974

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9291964

BMW 1 Series F20 Front Left Door N/S Wiring Loom Harness Cables 9291964

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6824383

BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 6824383

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9364818

BMW Z4 E89 ECU Body Control Module Junction Box H2 PL2RR JBBFE IIIR 9364818

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9145172

BMW E90 E91 E92 E93 LCI Battery Bracket Lower Section Box 9145172

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 5A70A69

BMW F40 Parking Module Comfort Control Unit ECU 5A70A69

PLN 474.95

Free delivery - Tue, Jan 13

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Part no. 6941445

BMW E63 E64 Bluetooth Cable Hands Free Telephone Microphone Unit 6941445

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

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Showing 793-891 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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