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. A1698201585

Mercedes W245 ECU Control Unit Sensor Air Module A1698201585

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6921309

BMW E65 E66 Centre Console Front Armrest Tray Cables Wiring Set 6921309

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1698200089

Mercedes A B Class W169 W245 Aerial Antenna Amplifier Right O/S A1698200089

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0971235J

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971235J

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6900582

BMW 7 Series E65 E66 Fuse Board Power Distribution Box

PLN 18.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009059101

Mercedes-Benz E-Class W207 W212 ESP Yaw Rotation Rate Sensor A0009059101

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6957348

BMW 6 Series E63 E64 F06 F12 F13 Aerial Antenna Amplifier Module Right O/S

PLN 28.95

Delivery - Tue, Jan 13

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Part no. 3Q0959655AC

Skoda Octavia 5E Air Module Control Unit ECU Module Sensor 3Q0959655AC

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1669002906

Mercedes W204 Headlight Range Control Unit Module ECU A1669002906

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9331207

BMW F20 CD DAB Radio Bluetooth Head Unit 9331207

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G8959793A

AUDI A7 4G8 Door Control Module Front Left N/S Driver Side 4G8959793A

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2466200018

Mercedes-Benz A-Class W176 Battery Frame Holder Bracket Mount Plate A2466200018

PLN 47.95

Delivery - Tue, Jan 13

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Part no. 5Q1937084C

Audi Q2 GA Module BCM Body Control Unit Module ECU 5Q1937084C

PLN 617.95

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Part no. A6395450203

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

PLN 75.95

Free delivery - Tue, Jan 13

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Part no. A2139003022

Door Module Mercedes W205 W213 X253 Rear Right Door Control Unit A2139003022

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0959792T

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

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 1472984-2

Mini R50 R52 R53 R55 R56 R57 R58 R59 R60 5-Pin Black Relay Wiper Set 1472984

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2045402710

Mercedes W204 Wiring Loom Cable Door Rear Left Right N/O/S A2045402710

PLN 42.95

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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. 1388911-1

BMW E36 E38 E85 Mini R52 R57 2x Change-Over Contact Relay Violet Set 1388911

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9184432-1

BMW 1 3 Series E81 E87 E90 E91 Control Unit Airbag ECU NO CRASH DATA 9184432

PLN 66.95

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. 7835131

BMW E60 E61 LCI M5 E63 M6 Fuel Injection System Adapter Lead 7835131

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6934002

BMW 7 SERIES E65 E66 Door Wiring Harness Mod Carrier Front Left N/S 6934002

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9316576

BMW 3 Series F30 F31 Battery Cable Wire Lead Positive Underfloor 9316576

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8602973

Battery Cable BMW F45 Mini F54 F56 B48 Alternator Starter Wiring 8602973

PLN 142.95

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. A2038219751-2

Mercedes W203 CL203 Roof Alarm Motion Sensor Cover Trim Black A2038219751

PLN 42.95

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. A2048207385

Mercedes-Benz C W204 Front Left Door N/S Control Unit Module A2048207385

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A9069014700

Air Module Mercedes W639 W906 Control Unit ECU Air Sensor 0285011060

PLN 522.95

Free 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. 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. 8E1971035DJ

Audi A4 B7 Front Door Wiring Harness Loom Cable Left N/S 8E1971035DJ

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6906600-1

BMW Mini Cooper R50 R52 R53 JCW Fuse Box Housing 6906600

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2218702993

Mercedes CL W216 W221 Air Module Control Unit A2218702993

PLN 61.95

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. 9227178

BMW E82 ECU Body Control Module Junction Box L1 PL2RR JBBFE 9227178

PLN 85.95

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. 8371312

BMW 3 Series E46 Relay Control Unit Module Bracket Holder 61358371312 8371312

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 7152588

Mini Cooper One R50 R53 JCW Fuel Filler Cover Flap Actuator 7152588 7127872

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009828223-1

Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223 SET x2

PLN 66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3428336

Mini Clubman Cooper R55 Antenna Amplifier Diversity Signal Booster 3428336

PLN 203.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9287433

BMW F21 F22 Wiring Loom Door Drivers Side Front Right O/S 9340973

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9362395

BMW F20 F30 F31 F34 Electrical Body Control Unit Module REM V2 9362395

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9313618

BMW 3 Series F30 F31 F80 M3 Front Rear Right O/S Wiring Loom Harness Cables Set

PLN 218.95

Free 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. 9160187

BMW 1 Series E81 Body Control Module ECU L2 PL2 JBBFE II Junction Box 9160187

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9186664

BMW 3 Series E92 Front Right O/S Driver Side Door Wire Wiring Loom 9186664

PLN 66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9267205

BMW E91 Touring LCI ECU Body Control Module Junction Box H2 9267205

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6821205

Battery Wire Mini Cooper F55 F56 F57 IBS Negative Battery Lead Cable 6821205

PLN 56.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A1679003118

Door Module Mercedes W205 W213 X253 Front Right O/S Control Unit A1679003118

PLN 322.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1635408905

Mercedes-Benz M-Class ML W163 Rear Axle Brake Wiring Loom Harness A1635408905

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009060401

Mercedes W204 OM651 14V 150A Alternator Generator Engine Start/Stop A0009060401

PLN 208.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A6519000601

Mercedes-Benz W906 313 CDI OM651 Diesel Engine Control Unit CRD ECU A6519000601

PLN 427.95

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. 8K0907637A

Audi A5 8T Acceleration Yaw Rate Sensor Module Control Unit ECU 8K0907637A

PLN 42.95

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. 2449488

Head Unit Mini F55 F56 Navigation Head Unit Radio DAB Media Player 2449488

PLN 1,424.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6943285

BMW E65 Xenon Headlight Control Module LM E6X LWR 6943285

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 31327066

Starter Motor Volvo S40 V70 XC90 Diesel Engine Actuator Motor 31327066

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9197354

BMW X1 X3 E84 F25 Cigarette Lighter Socket With Cable 9197354

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0061516201

Starter Motor Mercedes Sprinter W204 W211 W212 OM646 Diesel Engine A0061516201

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. 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. 7850599

BMW F80 M3 F82 M4 Wheel Accelerator Sensor Cable Rear Axle Suspension 7850599

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9159794

BMW 3 Series E93 Cabrio Airbag Control Unit Module ECU 9159794 65779159794

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A9064461142

Air Module Mercedes W639 W906 Control Unit ECU A9064461142

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6929554

BMW E65 E66 Door Air Module Sensor Control Unit Front Right O/S 6929554

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8T0971365J

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

PLN 56.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 5A5D3C0

Keyless Entry BMW F40 G20 G21 G30 G31 Comfort Access Antenna 5A5D3C0

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9134666

Seat Module BMW E87 E90 E91 E92 Control Unit ECU 9134666

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A9079009304

Mercedes Sprinter W907 Radar Sensor Distance Active Brake System A9079009304

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9389068

Fuse Box BMW F20 F21 F30 F31 F34 Power Distribution Front 9389068

PLN 94.95

Free 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. 9209684

BMW F01 F02 F04 F07 ECU ICM Control Unit Air Module Bag 9209684

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9189905

BMW X5 E70 X6 E71 Safety Control Unit Air Module Bag ECU Bosch 9189905

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009050438

Windscreen Camera Mercedes W204 W212 Front Windshield Camera Unit A0009050438

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6957761

BMW 5 6 Series E60 E61 E63 Passenger Door Airbag Control Module 6957761

PLN 28.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7848467

Engine Wiring BMW F80 M3 F82 F83 M4 S55 Loom Module Harness Cable 7848467

PLN 522.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9280186

BMW 5 7 Series F10 F11 F01 F02 F03 LCI Airbag Control Module ECU Unit 9280186

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9805670

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

PLN 75.95

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

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Part no. 3508099

BMW X3 SERIES E83 Wiring Loom Harness Passenger Side 3508099

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2465401850

Prefuse Box Mercedes W176 OM607 Fuse Relay Control Unit A2465401850

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1698207526-1

Mercedes W169 W245 Door Control Unit Left N/S Rear A1698207526

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8581751

BMW F40 MINI F56 F57 F60 Engine Control Unit ECU Box Top Cover Shield 8581751

PLN 42.95

Delivery - Tue, Jan 13

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Part no. 8373700-2

BMW E60 E63 E87 E90 E91 4X Relay Make Contact White Green Set 8373700

PLN 56.95

Delivery - Tue, Jan 13

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Part no. 6958358

BMW 5 X5 Series E39 E53 Hands-free Electronics Charging Module MULF 6958358

PLN 188.95

Free delivery - Tue, Jan 13

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Part no. 8R0919604A-1

Audi A5 8T Multimedia Radio Sat Nav Screen Display Head Unit 8R0919604A

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7571142-1

Mini Cooper R55 R56 R57 Battery Cable Wiring Lead Power Positive 7571142

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2059004321

Mercedes W205 X253 Front Right O/S Door Control Unit Module A2059004321

PLN 42.95

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. 7638192

BMW F20 F21 F30 F31 N13 Petrol Engine Starter Motor Bosch 7638192

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7533100

Mini Cooper One R50 Petrol W10 Engine Wiring Loom Harness Module 7533100

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9384214

BMW F10 ECU Body Control Module V2 PL6 JBBFE III Junction Box 9384214

PLN 208.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8386708

BMW X5 Series E53 Xenon Headlight Ballast Control Unit Module Hella 8386708

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2118703126

Headlight Module Mercedes C209 W211 CLS C219 Level Control Unit ECU A2118703126

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

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Showing 1189-1287 of 12186 products

Key components of vehicle electrical systems

Original electrical parts for popular car brands

A car's electrical system is a complex system responsible for many key functions—from engine starting to lighting and on-board electronics. Modern cars are equipped with increasingly advanced electrical solutions that not only improve driving comfort but also enhance safety. At the Global Parts automotive store you will find a wide range of used car parts , such as alternators, starters, batteries, control modules and other automotive electrical systems that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini and many others.

How does a car's electrical system work?

A car's electrical system is a complex system that consists of several key components that work together to ensure the vehicle's reliable operation:

Battery accessories – Includes clamps, cables, holders and other components necessary for battery installation and maintenance.

Electronic control modules and controllers – They control and manage the operation of various vehicle systems, such as the engine, air conditioning and ABS.
Alternators and generators – Responsible for generating electricity and charging the battery while the engine is running.
Parts for alternators and generators – Including voltage regulators, brushes and bearings that ensure proper operation of the alternator.
Starters – Key components of the starting system that enable the engine to be started.
Starter parts – Including bendixes, rotors and solenoids necessary for the proper operation of the starter.
Batteries – They store the electrical energy necessary to start the engine and power on-board systems.
Wires, harnesses and connectors – They transmit energy and electrical signals between various vehicle systems.
Fuses and fuse boxes – Protect the electrical system against overloads and short circuits.
Relays – They control the flow of current in individual electrical circuits of the vehicle. A functioning electrical system is the basis for the reliability of your car, regardless of operating conditions.

Key technical parameters of electrical systems

Each of these components has specific technical parameters that determine its compatibility with the vehicle. For example, alternators installed in mid-range cars (e.g., Volkswagen Passat B6) typically have a capacity of 90 A to 140 A, while luxury vehicles (e.g., Mercedes S-Class) require alternators with a capacity exceeding 180 A. Starter motors vary in torque and operating voltage – the standard is 12 V, while 24 V starters are used in heavy-duty vehicles.

Why is it worth taking care of your car's electrical system?

Regular maintenance and replacement of electrical system components is key to reliability and road safety. Faulty components can lead to:

Problems starting the engine.
Failure of safety systems such as ABS or airbags.
Decreased efficiency of on-board equipment, e.g. lighting or air conditioning. At the Global Parts store we offer original used car parts , which have undergone detailed quality tests, ensuring their full functionality.

Symptoms of electrical system disruptions

In practice, electrical faults manifest themselves in a variety of ways. Drivers most often notice: dimming lights when parked, difficulty starting the engine, a voltage drop on the on-board computer, or air conditioning malfunctions. The table below presents typical correlations:

Symptom	Possible cause	Item to check
Difficulty starting the engine	Worn out starter or battery	Starter motor, battery
Dimming the lights	Inefficient alternator	Alternator, voltage regulator
Electric windows not working	Damaged relays or harness	Relays, wires

How to choose the right parts for your electrical system?

When choosing parts for the electrical system, such as alternators, starters or control modules, it is worth paying attention to:

Vehicle-specific fit – Every car make and model requires specific specifications. At Global Parts, you'll find parts that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini, and many more .
Technical condition – All used parts we offer are thoroughly checked to ensure their reliability.
Technical parameters – For example, alternators should have appropriate current output, adapted to the needs of your vehicle.

Compatibility and fit

The selection of electrical parts is based primarily on OEM part numbers, but matching them to specific parameters is equally important, including current, voltage, and the number of connector pins. For example, the 120A alternator used in the Audi A4 B7 differs significantly from the 150A version installed in the Audi A6 C6 . Therefore, using manufacturer catalogs or providing the VIN makes finding the right component much easier.

Why choose used electrical parts?

Purchase of used car parts This solution allows you to combine savings with quality. Why choose it?

Lower costs – Used alternators, starters and other parts are cheaper than new ones, but offer the same high quality.
Ecology – You support recycling and reduce waste by choosing used car parts .
Wide range – We offer electrical parts for the most popular car brands, so you can easily find what you need.

How to take care of your car's electrical system?

To ensure your electrical system operates reliably for years, it is worth remembering a few rules:

Regularly check the battery condition and charge level.
Take care of your cables and connectors – corrosion or damage can lead to voltage drops and failures.
Monitor the operation of the alternator and starter – early detection of problems will help avoid more serious breakdowns. If you have any problems, you will find the right car parts at Global Parts that will help restore your vehicle to full working order.

Step-by-step control procedures

Measure the battery voltage with a multimeter – the resting value should be approximately 12.6 V.
Check the charging voltage with the engine running – the correct range is 13.8–14.5 V.
Assess the condition of the wires and terminals – lack of corrosion and a firm seat are essential.
If in doubt, check the quiescent current consumption – it should not exceed 0.05–0.08 A.

FAQ - Frequently asked questions about electrical systems in cars

Question	Answer
What is a car electrical system?	This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.
What is an alternator for in a car?	The alternator generates electrical current when the engine is running and charges the battery.
What is the difference between a starter and an alternator?	The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.
How to check if the battery is working?	Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.
What are the most common symptoms of car electrical failure?	Problems starting the engine, flashing warning lights, power windows not working or dimming lights.
Do electrical parts from one model fit another?	Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.
How often should you check your electrical system?	It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Summary: Automotive electrical systems at Global Parts Automotive Store

Automotive electrical systems are the foundation of the reliability and comfort of every modern vehicle. By choosing the right parts, such as alternators, batteries, and control modules, you can ensure your car's full operational efficiency. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , or others, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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