What is a car electrical system?

This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.

What is an alternator for in a car?

The alternator generates electrical current when the engine is running and charges the battery.

What is the difference between a starter and an alternator?

The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.

How to check if the battery is working?

Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.

What are the most common symptoms of car electrical failure?

Problems starting the engine, flashing warning lights, power windows not working or dimming lights.

Do electrical parts from one model fit another?

Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.

How often should you check your electrical system?

It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Automotive electrical systems

At Global Parts, we offer a wide selection of original used car parts, including automotive electrical systems for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each of our car parts undergoes quality control to ensure you receive a top-quality product.

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Products in promotion

Part no. 8720310

Telematics Module Mini F54 F55 F56 F60 Bluetooth Control Unit ECU 8720310

PLN 265.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2049060405

Mercedes W204 Front Fuse Board Box Relay Unit Case A2049060405

PLN 94.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 8P0035785

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

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9268336

BMW MINI Clubman R55 R55N LCI Cable Adapter Lead Sensor Side Airbag 9207117

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7515200

Mini Cooper R50 R52 R53 Battery Wire Cable Negative Earth Lead 7515200

PLN 46.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8579479-4

BMW F20 F21 F30 F31 118d 318d N47N Engine Control Unit ECU DDE 8579479 Manual

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2035402206

Mercedes W203 Diesel Engine Starter Alternator Electrical Cable A2035402206

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7647591

Engine Wiring BMW i3 I01 Hybrid Rex Sensors Cable Loom Harness 7647591

PLN 379.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 6835346

Mini F60 Rear Door Harness Loom Cable Wiring Left Right N/O/S 6835346

PLN 85.95

Free delivery - Tue, Nov 25

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, Nov 25

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Part no. 7600564

Mini Cooper R56 Automatic Gearbox TCU ECU Control Unit EGS Module 7579136

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. 4M0907590D

Audi S5 F5 Blind Spot Radar Distance Control Module Left N/S Slave 4M0907590D

PLN 664.95

Free delivery - Tue, Nov 25

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Part no. A1775408101

Mercedes W177 W243 W247 Door Wiring Cable Harness Loom Driver Side A1775408101

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8574095

BMW F20 F21 F30 F31 116d 316d 118d 318d Diesel N47N Engine ECU 8574095 Manual

PLN 170.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2139068701

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2139068701

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1695451440

Mercedes W169 W245 Central Gateway Module Bracket Holder Mount A1695451440

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9268438

BMW F10 F11 F01 F02 F03 Crash Impact Air Module Central Sensor Unit 9268438

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9267466

BMW F10 Body Control Module Junction Box V2 PL2 JBBFE III Lear ECU 9267466

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6850846

BMW F10 F11 F12 Parking Brake Unit Electric Control Module EMF 6850846

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9227766

BMW F11 Touring Tailgate Spoiler Probe AM/FM Sensor 9227766

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048701226

Mercedes S204 Door Module Rear Right O/S Control Unit ECU A2048701226

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7G92-14324-AE

Earth Ground Cable Land Rover Freelander 2 Line Strap Battery Lead 7G92-14324-AE

PLN 56.95

Delivery - Tue, Nov 25

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Part no. A2229002009

Mercedes W205 W222 Door Module Control Unit Rear Left N/S A2229002009

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 06J971082D

Audi Q3 8U Engine Injector Module Wiring Harness Cable 2.0 TFSI 06J971082E

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9438731

BMW F20 F21 F22 F30 F31 F32 F36 Body Control Module Unit FEM LR01 9438731

PLN 617.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218702993

Mercedes CL W216 W221 Air Module Control Unit A2218702993

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 0148459-BRG

Mini Cooper One R50 Fuel Filler Cover Flap British Racing Green A67 0148459

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9351155

Control Panel BMW X3 F25 X4 F26 Radio Player High Audio Unit Module 9208591

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0015424723-1

Mercedes W204 W207 W221 Parking Sensor Display Control PDC A0015424723

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8573257

BMW F20 F30 F32 120d 320d 420d N47N 184HP Engine Module ECU DDE 8573257 Manual

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6904165

BMW X5 E53 Front Dashboard Centre Console Lighter Wiring Loom Harness 6904165

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A0055421218

Crash Sensor Mercedes W176 W204 W212 Impact Airbag Unit Module A0055421218

PLN 47.95

Delivery - Tue, Nov 25

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Part no. 8512499-8

BMW E87 E90 LCI N47 118d 318d 143HP Diesel ECU Kit DDE 8512499 CAS3 + Key Manual

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0035225AJ

Audi Q7 4L Radio Aerial Antenna Amplifier AM/FM 4L0035225AJ

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2055406304

Mercedes W205 Hybrid Battery Cable Starter Wiring Loom Harness A2055406304

PLN 113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1679006613

Mercedes W177 Sliding Roof Module Sunroof Panoramic Control Unit A1679006613

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W0971687BR

Audi A4 B9 Rear Right O/S Door Wiring Loom Harness 8W0971687BR

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2465410005

Mercedes W176 W246 Battery Cover Fuse Box Trim Panel Lid A2465410005

PLN 47.95

Delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A2139008530

Mercedes W213 W447 Transmission Gearbox Control Unit Module ECU A2139008530

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3455304

Mini R57 Cabrio DWA Door Alarm Theft Deterrent System Unit 3455304

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. EXHAUST-FLAP-CONTROL

Audi A3 8V 1.6 TDI CLHA Drive Exhaust Flap Control Module Unit Actuator

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9287265

BMW F10 M5 Active Sound Unit Control Module Design Amplifier 9287265

PLN 275.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8636054

BMW F20 F30 LCI 120i 320i 330i B48 Engine Wiring Cable Loom Harness 8636054

PLN 712.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9380322

BMW F01 F02 F03 F10 F11 F13 Central Gateway Control Lear Module Unit ECU 9380322

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2721503933

Engine Wiring Mercedes C209 272960 Petrol Module Loom Harness Cables A2721503933

PLN 256.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A9079000704

Body Control Module Mercedes Sprinter W907 W910 SAM BCM Unit ECU A9079000704

PLN 569.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9329701

BCM Module BMW F20 F21 F30 F31 F32 Body Control Unit Module REM V2 9329701

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9231515

BMW F31 Rear Antenna Aerial Amplifier AM/FM DAB 9231515

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059006330

Mercedes W205 SAM Module Front Body Comfort Control Unit ECU A2059006330

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2709002100-1

Mercedes W176 W246 A180 B180 BlueEFFICIENCY 270.910 122HP Engine ECU A2709002100

PLN 1,424.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9360372

BMW X6 F16 Fuse Box Power Distribution Relay Control Unit Box Rear 9360372

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9153803

BMW X5 Series E70 Light Lightning Control Unit Module FRM II Lear 9153803

PLN 569.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0038212751

Mercedes-Benz M S W221 ML W164 Airbag Impact Crash Sensor Door A0038212751

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129004114

Door Module Mercedes W204 W212 Rear Left N/S Control Unit A2129004114

PLN 37.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8J0951177

Audi TT 8J Interior Roof Alarm Motion Ultrasonic Sensor 8J0951177

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7547141

BMW E82 E84 E87N E88 E90 E91 E92 E93 E93 E-box fan 7547141

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1179006000

Camera Module Mercedes W156 W176 Reversing Rear View Control Unit A1179006000

PLN 237.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A6421509478

Mercedes ML W164 OM642 Diesel Engine Control Unit Module ECU A6421509478

PLN 759.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6396641914

Mount Support Mercedes Vito W639 Battery Bracket Holder Mounting A6396641914

PLN 37.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9393144

BMW G11 G30 Fuse Box Power Distribution Electrical Control Unit Box Rear 9393144

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129004206

Door Module Mercedes W212 E-Class Rear Right O/S Control Unit A2129004206

PLN 37.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8579482

BMW F20 F21 116d ed Diesel N47N 116HP Engine Control ECU DDE 8579482 Manual

PLN 332.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0035570-1

Volkswagen Golf 5G Radio Antenna Noise Signal Disturbance Suppressor 5Q0035570

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8721882

BMW F20 F21 F22 F30 F31 LCI Head Unit Media DAB Navigation Professional 8721882

PLN 1,899.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1775402111

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775402111

PLN 85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8512047

BMW E90 E91 LCI N47N 320d ed ECU KIT DDE CAS 3 Key 8512047 Manual

PLN 759.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0959795J

Audi A5 8T Rear Door Module Control Unit Module ECU Left Right N/O/S 8T0959795J

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6394409909

Wiring Loom Mercedes W639 Vito Cable Sliding Door Rear Left N/S A6394409909

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6963023

BMW 5 6 Series E60 E61 E63 Airbag ECU Control Unit Centre Vehicle Sensor

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4G8959795F

Audi A7 4G Rear Door Control Module Unit ECU Left Right N/O/S 4G8959795H

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9207075

BMW X3 X5 Series E83 E53 Telematics Control Unit Module 9207075

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059007218

Automatic Closing Motor Mercedes S205 Estate X253 Trunk Lid A2059007218

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0141541102

Alternator Generator Mercedes W204 W207 Diesel Engine Valeo 150A A0141541102

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7583740

BMW Z4 E89 Earth Battery Cable Wiring Loom Harness Line 7583740

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2139068701-1

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit A2139068701

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6868253

BMW F20 F21 F30 F31 ECU ICM Control Unit Module Airbag ECU 6868253

PLN 66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9137703

Mini Cooper One R55 R56 Door Wiring Harness Factory Right O/S 9137703

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A0015423723

Mercedes A E Class W169 W211 Parking Sensor Display Control PDC A0015423723

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 3456871-1

Radio Boost CD Player Mini R56 R57 LCI R60 Head Unit Audio Player 3456871

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059004021

Mercedes W205 GLC X253 Door Module Control Unit Front Left N/S A2059004021

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1635402333

Mercedes-Benz M ML W163 Centre Console Wiring Harness Cable Loom A1635402333

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7220891

BMW E91 LCI Control Unit Module Support Plate Bracket Carrier Holder 7220891

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7857551

Battery Cable BMW F80 M3 F82 M4 Wire Lead Positive Alternator Starter B+ 7857551

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8719905

BMW X3 G01 X4 G02 Wireless Charger Centre Console Phone Module Unit 8719905

PLN 142.95

Free delivery - Tue, Nov 25

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, Nov 25

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Part no. A2049003211

Mercedes W204 Stereo Radio Autoradio CD Player Head Unit A2049003211

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. A6461502734-1

Mercedes W204 C220 CDI 170HP 646.811 Engine Unit ECU A6461502734 Automatic

PLN 474.95

Free delivery - Tue, Nov 25

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Part no. 6782372

BMW X1 X3 Z4 E83 LCI E84 E89 E90 E91 E92 Speed Sensor Cluster 6782372

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7612815

BMW F10 M5 F12 F13 M6 F07 X5 F15 Starter Motor 428000-8530 12V 7612815

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6977982

Mini Cooper R50 R56 R57 R60 Relay No Contact Taubenblau 6977982

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9231280-TS

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

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. A1668201089

Mercedes W176 Radio Aerial Antenna Amplifier Booster Unit Module A1668201089

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6774206

Active Cruise Control BMW E90 E91 E92 LCI Longitudinal Dynamic Module 6774206

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

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Showing 4258-4356 of 11506 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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