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. 6938975

BMW E60 E61 E63 E64 6-disc Compact CD Changer 6938975

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9454245

Differential Locking Module BMW F90 M5 G20 Rear Axle Control Unit ECU 9454245

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7120204

BMW E93 Cable Wiring Loom Harness Hydraulic Pump 7120204 7191362

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7561834-13

BMW E87 E90 120i 320i N46 150HP Engine Control DME Module 7561834 Automatic

€346.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3412336

BMW X3 E83 Battery Cable Negative Wiring 3412336

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586540-2

BMW F30 F32 LCI 330dX 430dX N57N 258HP Control Unit ECU Kit DDE 8586540 FEM Key

€332.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9307421

Camera Control Unit BMW F20 F21 F30 F31 KaFAS 2 Camera Module ECU 9307421

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9171948

BMW X5 X6 E70 E71 Air Module Control ECU Unit Module 9171948 0285010250

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9252812

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

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7391043

BMW F10 X1 F48 Mini F54 Rear Tailgate Smart Opener Bottom Wire Sensor 7391043

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3450847

BMW X3 E83 LCI Cable Loom Door Passenger Side Wiring Harness 3450838

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9390501

BMW 3 4 Series F31 F32 F80 M3 F82 M4 LCI USB Charger Adapter Socket 9390501

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7011612

BMW 7 Series E65 E66 E67 Centre Console Coinbox With Vent Storage Compartment

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6934095

BMW 7 Series E65 E66 Door Wiring Harness Rear Right Left N/O/S

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6922528

BMW 5 Series E61 E61N LCI Holder Bracket Additional Battery 6922528

€26.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6854031

BMW F01 F02 F03 F07 F10 F11 F12 LCI Active Steering Control Unit Module 6854031

€165.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8693213-1

BMW F30 LCI 330e B48X Engine Control Unit ECU Kit DME 8693213 FEM Key Automatic

€740.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9347822-1

BMW F10 F11 F20 F30 Head Unit Navigation Sat Nav High Control Module 9347822

€170.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6882963

Air Module BMW F01 F02 LCI F07 GT F10 F11 F13 ECU ICM Control Unit 6882963

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9258350

Air Module BMW F20 F21 F22 F30 F31 F32 Control Unit ECU 9258350

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8573260-7

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

€441.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6942551

BMW E87 E90 E91 Front Left N/S Seat Lordosis Pad Adapter Lead Wiring

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7176068

BMW X3 E46 E63 E83 Mini R50 R53 Control Unit Xenon Light 1307329074

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6906347-1

BMW X5 E53 Rear Bumper PDC Plug Socket Loom Cable 6906347

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6922652

BMW X3 E91 E83 Sunroof Sliding Roof Drive Unit Motor Actuator 6922652

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9337879

BMW 1 3 4 Series F20 F21 F30 F31 F34 Power Distribution Fuse Box Front 9337879

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9168335

BMW X1 E84 Antenna Amplifier Diversity 868 MHZ 9168335

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586573

BMW F20 F30 LCI Wiring Harness Engine Gearbox Module 120dX 320dX B47 8586573

€165.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8632554

Fuse Box Cover BMW X3 G01 X4 G02 Trim Panel Lid Housing Bracket 8632554

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9189906-1

BMW E88 E93 Air Module Control Unit ECU 9189906

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7631932

Engine Wiring BMW F30 F31 N20 Loom Module Harness Cable 7631932

€75.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6925945

BMW 5 Series E60 E61 Rear Left Right Door N/O/S Wiring Cable Harness Loom

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9127088

BMW E81 E90 DC/DC Torque Converter Module Wandler 9253208 9127088

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9177983

BMW E87 LCI Body Control Module Junction Box H2 9177983

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9289385

BMW F10 F34 GT Telematics Module Bluetooth Telematik Control Unit 9289385

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8507906

BMW 1 3 F20 F21 F30 Engine Gearbox Wiring Harness Glow Plug Module 8507906

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9231443

BMW 3 Series F30 F80 M3 Radio Antenna Amplifier Suppression Filter 9231443

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5A41CA2

Air Module BMW F45 F46 Mini F55 F56 F60 ECU Control Unit 5A41CA2

€237.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 2622341

BMW 2 3 5 Series F10 F22 F30 F32 Antenna Amplifier Module Trap Circuit 2622341

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9171984

BMW E60 E61 E63 E64 LCI Control Unit Lane Departure Warning Module ECU 9171984

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9348935

BMW X1 F45 F48 Mini F55 F56 F60 Air Module Control Unit Module ECU 9348935

€151.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6968835

BMW 1 Series E87 Footwell Control Module Body H2 61356968835 6968835

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586540

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

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9139899

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

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9459673-1

Seat Module BMW X4 F26 F20 F30 Front Driver Side Control Unit ECU 9250421

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8510221-2

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

€227.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8067512

BMW F10 F11 F30 F31 Alarm System Unit Security Basis Module 8067512

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6956750

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9123739

BMW 1 3 5 7 Series E81 E87 E90 E91 E92 F01 USB USB Hub Audio Interface Module

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9226326

BMW E81 Body Control Module Control Unit L2 PL2RR JBBFE III ECU 9226326

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8573257-7

BMW F30 F31 320d ed Diesel N47N 163HP ECU Kit DDE 8573257 + Key + FEM Automatic

€123.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7115655-LMB

BMW X3 E60 E61 E83 Front PDC Parking Distance Sensor Le Mans Blau - 381

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7592511

BMW E88 E90 E91 E92 LCI F20 F21 F30 Ignition Wiring N55 Engine Harness 7592511

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8571350

BMW 1 5 Series F10 F11 F20 F21 LCI B47 Starter Acoustic Vibration Plug 8571350

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8630125-4

BMW F20 F21 F30 116i 316i N13 136HP Engine Control ECU Kit DME 8630125 Automatic

€503.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9171900

BMW X5 E70 X6 E71 Computer Control Unit DVD Player RSE MID PLUS PL4 9171900

€360.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9873895

BMW F40 Crash Control Unit Air Module ECU Continental 9873895

€123.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8595865

Wiring BMW F32 F33 F36 LCI N57Z Engine Gearbox Module Wiring Harness 8595865

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9264923

BMW F01 F02 F10 F11 F13 Power Distribution Fuse Box Rear 9264923

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9399247

BMW F20 F30 F31 F32 ECU Camera Module Based Drive Support

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7404880

Fuel Pump Module BMW F20 F21 F30 F31 Control Unit ECU 7404880

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6941503

BMW X5 Series E53 Cable Harness Door Front Right Left N/O/S 6941503

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9265300

BMW 1 2 Series F20 F21 F22 F23 LCi Headlight Switch Control Element Light

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6921979

Door Module BMW E65 E66 E67 Front Door Control Unit Passenger Side 6921979

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7638001

BMW 1 3 Series F20 F21 F30 F31 N47N Earth Cable Battery Engine 7638001

€22.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9270354-1

Mini F55 F56 BMW F45 X1 F48 Rear Electric Power Distribution Fuse Box 9270354

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9240236

BMW F01 LCI F10 F12 High Voltage Battery Charging Unit Module BCU 150 9240236

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9298945

BMW X1 E84 ECU Body Control Module Junction Box H2 PL2RR JBBFE IIIR 9298945

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9234942

Telematics Module BMW E81 E87 E90 E91 E92 LCI Combox Navigation 9234942

€142.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9225619

BMW F10 Electronic Front Seat Memory Module Control Unit ECU 9225619

€70.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8519668

BMW E90 E91 LCI 320d N47N 184HP Engine Control Unit ECU DDE 8519668 Manual

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9267535

BMW X3 F25 Body Control Module ECU Junction Box JBBFE III 3 V9 Lear 9267535

€37.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7552176-7

BMW Z4 E85 2.0i N46 150HP ECU Engine Control Kit DME 7552176 CAS2 Key Manual

€332.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6911024

BMW Z4 E85 E86 Battery Mounting Bracket Part Holder 6911024

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9231399

Camera Module BMW F01 F07 F10 F11 F12 Based Assist Systems Control Unit 9231399

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9189905

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9380938

BMW 2 Series F45 Door Wiring Loom Harness Co-Driver's Passenger's Side 9380938

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8494948

BMW F40 F44 F48 Mini F54 Rear Tailgate Smart Opener Top Wire Sensor 8494948

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 969713

BMW F01 F07 Boot Trunk Lid Tailgate Lock Wiring Harness Loom Cable 969713

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8512047-4

BMW E90 E91 LCI N47N 320d 184HP Engine Control Unit ECU DDE 8512047 Automatic

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9393780

BMW F45 F46 Mini F55 F56 F57 KaFAS Camera Front Lane Assist ECU Module 9393780

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6974631

BMW Z4 Z3 Series E36 E85 Module Radar Burglar Alarm Sensor

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7636937

Ping Sensor BMW F20 F31 LCI Mini F55 F56 Engine Block Knock Sensor 7636937

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6836648

BMW G32 Adapter Cable Switch Door Center 6836648

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9124952

BMW 3 Series E90 E91 E92 E93 LCI Cable Duct Battery Lead Rear 9124952

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9189906

BMW E88 E93 LCI Air Module Control Unit ECU 9189906

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9240077

BMW E93 Cabrio Convertible Folding Top Roof ECU Module CTM 9240077

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9361589

BMW 2 F45 Active Tourer Door Wiring Loom Harness Cable Driver's Side 9361600

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8489325

BMW i3 I01 94Ah Rex Hybrid Basic Control Unit Module ECU 8489325

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7075943-2

BMW E60 E61 E65 Front Left N/S Seat Height Adjustment Drive 7075943

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8387546

BMW 3 Z4 Series E46 E85 E86 Battery Positive Cable Fuse Box B Base 8387546

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8366625

BMW 259 259R 259 R22 Connection Plug Relay Pink Tyco 8366625

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8576341-7

BMW F20 F21 F30 F31 116d 316d 116HP N47N ECU Kit DDE 8576341 + Key + FEM

€227.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8715685

BMW F40 Mini F55 F56 Mid Range Sound Speaker Front Door Stereo 8715685

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9303543

BMW F20 F30 F31 Fuse Box Electrical Power Distribution 9303543

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1388911-1

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6960803

BMW E65 E66 E67 Control Unit Voice Input System Module 6960803

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8494949

Rear Tailgate Sensor BMW F40 F44 F48 Mini F54 LCI Smart Opener Bottom 8494949

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9227172

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

€146.95

Free delivery - Wed, Jan 14

If paid before 14:00

...

Showing 1090-1188 of 5105 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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