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. 9131850

CD Changer BMW E60 E61 E63 6-DISC Compact without Magazine 9131850

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7678321

BMW X4 F26 Harness Wiring Cable Loom 7678321 767832-113

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9347470

BMW 1 3 Series F20 F21 F30 Control Unit Controller Touch 9347470

PLN 275.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907383N

Porsche Macan 95B Trailer Detection Control Module Unit ECU 4H0907383N

PLN 902.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9224872

BMW 1 2 3 4 Series F20 F21 F30 F80 Cover Power Distribution Fuse Box 9224872

PLN 18.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129003414

Fuse Box Mercedes C204 W204 Front Relay Control Unit Module SAM A2129003414

PLN 455.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2539009309

Mercedes C253 W293 Rain And Light Sensor Control Unit Module ECU A2539009309

PLN 332.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3404975

BMW X3 Series E83 E83N LCI Solar Sun Light Sensor 3404975

PLN 18.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0937125G-1

Seat Ateca Audi Q3 Mk2 TT 8S Fuse Relay Box Engine Bay Supply Unit 5Q0937125G

PLN 161.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5N0035342G

VW Volskwagen Polo 6R Multimedia Electronic ECU Control Unit Module 5N0035342G

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6923547

BMW E65 E66 6-fold CD Changer Multichanger Without Magazine 6923547

PLN 522.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7525434

Mini R52 R53 W11 Battery Cable Wire Harness Starter Base B 7525434

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1669005605

Door Module Mercedes W176 W246 Front Left N/S Control Unit VST A1669005605

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9282285

BMW X3 F25 Central Gateway Module Control Unit ECU 9282285

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9237085

BMW F10 F11 Cable Loom Door Passenger Side Wiring Harness 9240882

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4M1907468D

Audi A4 B9 Gateway Control Module Unit ECU 4M1907468D

PLN 617.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3Q0907338E

Audi S3 8V Front Headlight Lamp Range Control Module ECU 3Q0907338E

PLN 104.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2711504733

Mercedes W204 Injection Electrical Wiring M271 Petrol Engine Cable A2711504733

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9279391

BMW 5 G11 G30 M5 Door Crash Sensor Front 9279391

PLN 66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9154358

BMW E81 E87 E90 Hands-Free Electronics Charging Module MULF 9154358

PLN 275.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009003713

Mercedes W205 Tyre Pressure Control Module Unit A0009003713

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6C0959655L

Seat Ibiza 6J VW Polo 6C 6R Air Module Unit Control Unit ECU Bosch 6C0959655L

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9153135

BMW F01 F02 F03 Holder Bracket Control Unit Amplifier 9153135

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8627098

BMW F45 X1 F48 Mini F60 Automatic Gearbox Module Control Unit EGS 8627098

PLN 664.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6928934

Antenna Amplifier BMW E82 E90 E92 Diversity Signal Boost 6928934

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1J0906381B

Audi TT 8N Fuse Box Relay Control Unit Module 1J0906381B

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6949450

BMW 5 Series E60 E61 Centre Console DSC PDC Switch Center Cluster 6949450

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9X2Q9A361CA

Range Rover L320 Sport Rear Fuel Pump Control Unit Bracket Holder 9X2Q9A361CA

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1695402733

Mercedes W169 W245 Cable Loom Wiring Parking Sensors Rear A1695402733

PLN 113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6958446

BMW E65 E66 E67 Control Unit Door Front Passenger Side Module ECU 6958446

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9286236

BMW F30 Door Wiring Front Passenger Door Loom Cables Harness F31 9286236

PLN 113.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 8P0035535

Audi A4 B7 Amplifier Bracket Aerial Antenna Module Mount Holder 8P0035535

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9274276

BMW F07 Gran Tourismo Headlight Footwell Light Control Module FRMIII 9274276

PLN 218.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7621178-1

BMW E81 E87 LCI E90 N43 118i 318i ECU Kit DME CAS3 Key 7621178 Manual

PLN 759.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7P6971121H

VW Volkswagen Touareg 7P Door Wiring Loom Harness Front Left N/S 7P6971121C

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1698203185

Mercedes-Benz A B Class W169 W245 Door Control Module Left Rear N/S A1698203185

PLN 46.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8516739-6

Mini SD R56 LCI R60 143HP N47N Engine ECU Kit DDE 8516739 + CAS3 + Key, Manual

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2229009519-1

Mercedes C238 Head Unit Radio CD Player Audio Sat Nav Control A2229009519

PLN 2,279.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9119355

BMW E60 E61 E63 E81 E87 E90 E91 DAB Radio Tuner Module 9119355

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6549061400

Starter Motor Mercedes W213 S213 W238 OM654 Diesel Engine Actuator A6549061400

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129003922-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

PLN 170.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 7795485

BMW X1 E81 E84 E87 E90 E91 Earth Cable Battery Cable 7795485

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A0004461160

Mercedes Sprinter W906 FleetBoard Onboard Time Recorder Control Unit A0004461160

PLN 474.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6519002803-3

Mercedes Vito W447 114 CDI OM651.950 Engine ECU Kit Ignition + 2 Key A6519002803

PLN 1,899.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8512415-7

Mini Cooper SD R60 ALL4 N47N 143HP Engine ECU Kit DDE 8512415 CAS3 Key Manual

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. F1ET-14F144-BC

Ford Transit Connect Door Module Front Right O/S Control Unit ECU F1ET-14F144-BC

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9380885

BMW 1 3 4 F20 F30 F32 Control Unit Air Conditioning A/C Module 9380885

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3457434-1

Mini Cooper One R55 R56 R57 LCI R60 Radio Boost CD Player Head Unit 3457434

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. R50-PARK-LANE

Mini R50 Park Lane Sticker Rear Window Decals Plates Set

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059008118

Telematics Module Mercedes W176 W205 W218 Communication Control Unit A2059008118

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7550975

BMW 1 3 Series E81 E82 E87N E88 E90 E91 E92 N43 Starter Motor

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9288769

BMW F20 F22 F30 Sound Speaker Front Door Audio Mid Range Stereo HiFi 9288769

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 443937105B-1

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8518424-1

BMW F20 F30 118d 318d N47N 143HP Engine Control Unit ECU DDE 8518424 Manual

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

PLN 161.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0038202926

Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129004307

Display Screen Mercedes W204 W212 Information Navigation Dashboard A2129004307

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0907451

Audi A3 8V Sun Light Solar Sensor Control Detector 8V0907451

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2105460141

Mercedes-Benz E-Class W210 Battery Cable Box Connector Petrol A2105460141

PLN 27.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1638201126

Mercedes ML W163 Windscreen Rain Light Sensor Control Module A1638201126

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959793H

Audi A4 B8 A5 8T Door Module Control Front Unit ECU 8K0959793H

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2535401401

Mercedes X253 Battery Wiring Harness Cable Tray Clamp A2535401401

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. BK3T18D815BG

Ford Transit MK8 Radio Head Unit Control Panel BK3T-18D815-BG

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6929557

Air Module BMW E65 E66 Driver's Seat Sensor Control Unit 6929557

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9116542

BMW E39 X5 E53 X3 E83 PDC Parking Distance Control Unit Active Module 9116542

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8D0951253A

Audi A6 C6 Multi Use Relay Unit Module 4 Pins 373 8D0951253A

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6935667-1

BMW Z4 Series E85 Roadster Battery Lead Positive Cable Plus Pole 6935667

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1725420023

Mercedes W176 W204 W246 Front Parking Sensor Display Control PDC A1725420023

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9244426

BMW X5 E70 Rear Bumper PDC Cables Wiring Loom Set 9219647

PLN 218.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129009128

Door Module Mercedes W207 W212 CLS W218 Front Left N/S Control Unit A2129009128

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2045409813

Battery Cable Mercedes W204 W207 Positive Wiring Harness Loom A2045409813

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0971230FP

Battery Cable Audi A3 8V Starter Alternator Wiring Harness 5Q0971230FP

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2465400082

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465400082

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A4148200526

Mercedes Vaneo W414 Front Left Right Door N/O/S Control Unit Module A4148200526

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009001810

Windshield Camera Mercedes W166 R172 Driver Assist Front Camera A0009001810

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7631587

BMW 1 3 X5 Series E53 E81 E87 E90 LCI Battery Mounting Bracket Clamp Bolt Holder

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9273666

BMW F33 F83 M4 Convertible Rear Antenna Aerial Amplifier AM/FM 9273666

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 13150706

Opel Corsa D Head Air Module Roof Side Curtain 13150706

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9181453

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

PLN 18.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959792B

Audi Q7 4L Door Control Unit Module ECU Passenger Side 4L0959792B

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6941430

BMW 5 6 Series E60 E63 Passenger Door Airbag Control Module N/S 6941430

PLN 66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048702789

Aerial Antenna Amplifier Mercedes W204 Estate Left N/S Booster Unit A2048702789

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2479002613

Mercedes CLA C118 W177 W205 W213 Telematics Control Unit Module A2479002613

PLN 151.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9325537

BMW 5 Series F10 Electric Parking Brake Module Cable Wiring Loom 9325537

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009054807

Mercedes W118 W177 W206 W247 NOX Sensor A0009054807

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 80A906093

Audi Q5 FY Fuel Pump Control Unit Module ECU Diesel Kuhnke 80A906093

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7848265

BMW F87 M2 F80 M3 F82 F83 M4 S55 Engine Wiring Loom Module Harness Cable 7848265

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6919905

BMW X5 Series E53 PDC Parking Control Module Unit PDC 6919905

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7641652-1

Engine Wiring BMW F10 F31 F32 N20 Engine Sensor Module 1 Harness 7641652

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8S0915181A

Audi TT FV HV Battery Negative Terminal Cable Harness Loom Wiring 8S0915181A

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 3453293

Mini Cooper One R56 SPEG PL3 M2 Fuse Distribution Box 3453293

PLN 427.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059009230

Air Conditioning Module Mercedes W205 C253 A/C Control Unit ECU A2059009230

PLN 75.95

Free delivery - Tue, Nov 25

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, Nov 25

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, Nov 25

If paid before 14:00

Part no. 7795638

BMW 3 E90 E91 E92 E93 Cable starter-base B Diesel 7795638

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009820012

Mercedes W176 W212 W246 Voltage Converter Power Distributor Inverter

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

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Showing 3466-3564 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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