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. 7794911

BMW E87 E90 E91 Cable Alternator Starter Base B 7794911

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2075401102

Mercedes W207 A207 C207 Loudspeaker Cable Wiring Loom Harness

Product currently unavailable

Part no. 4L2035670J

Audi Q7 4L Head Unit Radio Player Navigation Control Module Alpine 4L2035670J

PLN 1,899.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2514401909

Mercedes W164 W251 Wiring Loom Cable Harness Door Front Left Right A2514401909

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6926459

BMW X1 E81 E82 E84 E87 E88 E90 E91 E92 Climate Control Solar Sensor 6926459

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9286156

BMW X3 F25 Footwell Light Module Control Unit ECU FRM3 9286156

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9233009

BMW F33 F83 M4 Convertible DWA-Alarm System Module Unit ECU 9233009

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8379766

BMW E65 E90 E91 E92 E93 Auto Boot Release Switch Tailgate 8379766

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8573260-4

ECU Kit BMW F20 F21 116d ed Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

PLN 1,709.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 2449488

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

Product currently unavailable

Part no. 7296090

BMW Z4 F30 F31 E89 Headlight Ballast Control Unit Xenon Light 7296090

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9141446

BMW E93 Cabrio Convertible Hydraulic Pump Power Supply Cable 9141446

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7522284-1

Mini Cooper One R50 R52 W10 1 Battery Cable Plus Pole 7522284

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9803844-4

Aerial Roof Antenna Mini Cooper Countryman R58 R60 R61 Base Module 9803844

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048704626

Door Module Mercedes W204 Rear Right O/S Control Unit Module A2048704626

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8J0035456A

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9229847

BMW E70 Door Wiring Front Passenger Door Loom Cables Harness 9229847

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0971036B

Audi RS4 B8 Door Wiring Harness Cable Loom Front Right O/S 8K0971036B

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6461505091-2

Mercedes W203 C220 CDI 150HP 646.963 Engine Control ECU Kit A6461505091 Automat

PLN 854.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9280185

Air Module BMW F10 F11 F01 F02 F03 LCI Control Unit ECU 9280185

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9324781

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9324781

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6915327

BMW E46 E39 E60 E81 E87 E90 E91 F10 F20 F30 Relay Make Contact Sky Blue 6915327

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1669007814

Mercedes W166 W176 Navigation Screen Head Unit Sat Nav Display A1669007814

PLN 522.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6461505072-1

Mercedes W211 E220 CDI 646.821 170HP Engine ECU Kit A6461505072 Ignition + Key

PLN 949.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 9289590

BMW X5 X6 E70 E71 Antenna Amplifier Module Trap Circuit 9289590

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9361116

BMW F10 LCI Body Control Module ECU Unit JBBFEIII V2 PL6 9361116

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2139007436

Mercedes W177 W213 Gearbox Transmission Control Module Unit ECU A2139007436

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 2379303

Engine Wiring Mini One F57 Petrol B38 Loom Cable Harness Injector Module 2379303

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9252639

Parking Module BMW E81 E84 E87 E90 E91 Control Unit PDC 9252639

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W0419065D

Audi A4 B9 A5 F5 Power Steering Column Control Unit Module 8W0419065D

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8574091-6

BMW F10 F11 520d N47N 184HP Engine ECU Kit Unit DDE 8574091 CAS4 + Key Manual

PLN 712.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7P6919603

VW Volkswagen Touareg 7P Dashboard Multimedia Display Screen Panel 7P6919603

PLN 664.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6900582

BMW 7 Series E65 E66 Fuse Board Power Distribution Box

PLN 18.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 3448250

BMW X3 E83 Front Door Window Lifter Regulator Motor Right O/S 3448250

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9154349

BMW MINI Clubman R55 Cable Wiring Loom Splitdoor Split Door Rear Left N/S

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8512415-5

Mini Cooper D R56 LCI N47N 112HP Engine ECU Kit DDE 8512415 CAS3 Key Automatic

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9890599

BMW F90 M5 G11 G30 Air Module Crash Control Unit 9890599

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9350003

Safety Control Unit BMW F01 LCI F07 F10 F11 F25 Air Module Bag ECU 9350003

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959595K

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595K

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7237647

BMW E90 LCI F01 F10 F11 F20 F21 Control Unit Xenon Light 7237647

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1669003602

Mercedes W204 R172 DAB Receiver Digital Audio Control Unit Module A1669003602

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0959795F

Audi A5 8F Window Lifter Module Control Unit Rear Left Right N/O/S 8T0959795F

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 3456995

Mini Cooper One R55 R56 R57 LCI R60 Radio Boost CD Player Unit Head 3456995

PLN 854.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L906022DH

Audi TT 8J 2.0 TDI 170HP CBBB Quattro Engine Module Unit ECU 03L906022DH Manual

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9229873

BMW 1 Series E81 Body Control Module ECU L2 PL2RR JBBFE III Junction Box 9229873

PLN 180.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2389055000

Mercedes W205 Antenna Aerial Amplifier Duplexer Module Receiver Unit A2389055000

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8650701-1

BMW F80 M3 F82 F83 M4 S55 431HP Engine Module ECU DME Kit 8650701 Automatic

PLN 4,749.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1775401758

Mercedes W118 W177 W247 Starter Alternator Wiring Loom Harness Cable A1775401758

PLN 341.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1718204426

Mercedes W169 W245 Rain Light Sensor Control Unit Module A1718203726

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6988965

BMW E81 E87 E90 LCI PDC Parking Ultrasonic Sensor Spacegrau 6988965

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L911021E

Audi A4 B8 Starter Motor Engine Motor Actuator Diesel Bosch 03L911021E

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2319003706

Mercedes R231 Control Unit Module Passenger Seat A2319003706

PLN 522.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7394651

BMW 5 F11 Touring Rear Boot Trunk Lid Tailgate Control Unit Module ECU 7333928

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F9035225D

Audi A6 C6 Antenna Amplifier Control Unit Module ECU 4F9035225D

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9253111-1

BMW 1 2 Series F20 F21 F22 Positive Plus Pole Battery Blow Cable Part 9253111

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8586540

BMW F30 F32 LCI 330d 430d N57N 258HP Engine Control Unit Module ECU DDE 8586540

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9317092

Mini One F55 F56 Cable Electric Automatic Hold Brake Handbrake 9317092

Product currently unavailable

Part no. 8631637

Earth Ground Cable BMW i3 I01 Battery Starter Terminal Wiring 8631637

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9187534

BMW E81 Body Control Module Unit ECU L2 PL2 JBBFEII 9187534

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009002308

Mercedes W447 W906 Adblue Module Exhaust Gas Control Unit ECU A0009002308

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9296494

BMW F20 F21 F22 F30 F31 F32 Control Unit Airbag Ecu 9296494

PLN 179.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9146714

BMW X3 E83 Z4 E85 E86 Radio Sat Nav Control Unit CD Player Control Unit 9146714

Product currently unavailable

Part no. A2468201915

AUX Jack Port Mercedes C117 W246 W176 Wiring Loom Cable Harness A2468201915

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5QF959655BT

Seat Ibiza Mk5 Air Module Control Unit 5QF959655BT

PLN 1,899.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2185409606

Mercedes C218 Parktronic Parking Sensor Wiring Cable Rear PDC A2185409606

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8573258

BMW F20 F21 F30 F31 116d 316d 118d 318d Diesel N47N Engine ECU 8573258 Manual

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9367350

KaFAS Camera BMW F10 F20 F30 Mini F55 F56 Front Control Unit Module ECU 9367350

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9252812

BMW F10 F11 F01 Fuse Box Power Distribution Junction Relay Rear 9252812

PLN 66.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A2059001240

Mercedes GLC 220d X253 Air Conditioning Climat A/C Control Module A2059001240

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 2Q0915181B

Seat Ibiza Mk5 Negative Battery Terminal Cable Lead 2Q0915181B

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2049060105-1

Mercedes W204 SAM Control Unit Module Fuse Box Relay Rear A2049060105

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7075944-3

BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009829608

Mercedes W204 W212 W222 Auxiliary Additional Generator Battery A0009829608

PLN 705.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A6397600340

Mercedes Vito W639 Door Handle Cable Catch Bowden Cable Rear A6397600340

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1695403945-1

Mercedes W169 W245 Central Gateway Control Unit Module ECU A1695403945

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0035223AB

Audi A4 B8 8K A5 8T Sound System Audio Amplifier Amp Unit 8T0035223AB

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907064DP

Audi A4 B8 Body Control Module BCM Comfort Control Unit 8K0907064DP

PLN 66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5QA919294C

Audi Seat Skoda Volkswagen PDC Parking Sensor Control Unit Module 5QA919294J

PLN 104.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1645403130

Mercedes W164 Positive Battery Cable Wiring A1645403130

PLN 664.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. K211-K223

Chip Power Chiptuning Box GS2 K211-K223 Control Unit Module Tuning Set

PLN 474.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A2229005914

Mercedes W205 Rear SAM Module Control Unit A2229005914

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9380323

BMW 5 Series F10 Steering Column Module Electronic Control Unit ECU 9380323

PLN 265.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9459681

Seat Module BMW F20 F30 F32 F33 X1 F48 X5 F15 Front Control Unit ECU 9459681

PLN 474.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7188487

BMW E93 Convertible Battery Mounting Bracket Clamp Bolt Holder Mount 7188487

PLN 42.95

Delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. A1698209926

Mercedes W169 W245 ECU Air Control Unit Sensor Module A1698209926

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 95860411300

Porsche Macan 95B Audi A8 D4 Starter Motor 12V DENSO 95860411300 06M911024

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7951069

KaFAS Camera BMW F45 Front Camera Control Unit Module 9384688

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8672514-1

BMW F80 M3 F82 F83 M4 431HP Engine Control ECU Kit DME 8672514 + FEM Module Key

PLN 4,749.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9289115

Radio Professional BMW E81 E87 E90 E91 LCI Autoradio CD Bluetooth 9289115

Product currently unavailable

Part no. 8T0919611-1

Audi A4 B8 Head Unit Media Player Controller Knob Switch Panel 8T0919611

PLN 237.95

Free delivery - Tue, Nov 25

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, Nov 25

If paid before 14:00

Part no. 9157158

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9157158

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1779004106

Door Module Mercedes C118 W177 W247 Front Right O/S Control Unit A1779004106

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F1862335

Audi Q7 4L Bluetooth Interface Telephone Control Module ECU Unit 4F1862335

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

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Showing 694-792 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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