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. 8582155-3

BMW F20 F30 F32 120dX 320dX 420dX 184HP N47N Engine ECU 8582155 Automatic

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9130047

BMW 3 4 5 Series E92 F32 E61 LCPA Seat Belt Module ECU

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2135400329

Mercedes X253 Electrical Wiring Harness Cable Hybrid A2135400329

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7558911

BMW 1 Series E81 E82 E87N E88 NOx Cable Wiring Petrol 7558911 12517558911

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4F0959651

Audi A6 C6 Front Impact Sensor Safety Crash Detection Module Unit 4F0959651

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8617707

BMW Mini Cooper F55 F56 Wiring Harness Engine Supply Module Cable Loom 8617707

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8P0907404-1

Audi RS3 8P 2.5 TFSI CEPA Quattro 340HP Engine Unit ECU Kit 8P0907404 Automatic

€1,139.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9170453

BMW X5 E70 Footwell ECU Light Control Module Xenon FRM II Lear 9170453

€170.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9293309

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9293309

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2079013700

Mercedes-Benz E-Class W207 Windscreen Windshield Rain Sensor Control Unit

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9206936

BMW F12 Antenna Aerial Noise Suppression Filter Control Unit Right O/S 9206936

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9362445

BMW F20 F21 F22 Audio Amplifier Harman Kardon Active Sound Design Unit 9362445

€104.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1569007702

Signal Actuation Module Mercedes W176 W246 SAM Control Unit ECU A1569007702

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1K0971349GA

Volkswagen VW Golf Mk6 1.6 TDI Alternator Cable Wiring Harness Loom 1K0971349GA

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7801173-1

BMW X5 X6 E70 E71 M57N2 Alternator Generator 180A VALEO 7801173

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3456625

Mini R56 MMI Multimedia Switch Button Panel Radio Reader Boost CD Player 3456625

€332.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9313638

BMW F30 F31 F80 M3 Front Passenger Wiring Loom Harness Cables 9313638

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4H0951253

Audi A3 8P Multi Use Control Module Relay 4 Pin Light Green Unit 4H0951253

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6934648

BMW X5 E70 E91 LCI Touring Tailgate Trap Circuit Aerial Amplifier 6934648

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7H0907652A

Audi Q7 4L Yaw Rate Speed Sensor Module 7H0907652A

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8574372

BMW F30 F32 330d 430d Diesel N57N Engine Control Unit ECU DDE 8574372 Automatic

€189.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2741504704

Mercedes X253 Engine Wiring Harness Line Supply Line A2741504704

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9172019

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module 9172019

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8617709

BMW Mini Cooper F55 F56 Wiring Harness Motor Sensorsystem Module 8617709

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8W0907064GB

Audi A4 B9 A5 F5 Central Body Control Module BCM Unit ECU 8W0907064GB

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A4539018900

Smart ForTwo C453 Air Module Impact SRS Control Module ECU A4539018900

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8T0959793P

Audi A4 B8 A5 8T Door Control Unit Module Front Driver's Side 8T0959793P

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2125405710

Mercedes W212 PDC Wiring Parktronic Parking Sensor Cable Rear A2125405710

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2049060305

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2049060305

€108.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586536-8

BMW F30 F32 LCI 335dX 435dX N57Z 313HP Engine ECU Kit DDE 8586536 Automatic

€450.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8J0057186Q

Audi TT 8J Radio Head Unit CD Audio Player Control Unit 8J0035186Q

€85.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8E0907307D

Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2124405933

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405933

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9296780

BMW F20 F21 F30 F31 Control Unit Air Conditioning Module 9296780

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2229005914

Mercedes W205 Rear SAM Module Control Unit A2229005914

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0009003310

Mercedes W205 W213 Fuel Pump Module Control Unit ECU A0009003310

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9393144

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

€47.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9316575

BMW 1 2 Series F20 F21 F22 Battery Cable Lead Positive Underfloor 9316575

€75.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8578946-3

BMW F20 F30 F32 120d 320d 420d 184HP N47N Engine ECU Kit DDE 8578946 Automatic

€142.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2139008730

Mercedes C253 W177 W205 W247 Gearbox Module Control ECU Automatic A2139008730

€37.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3508099

BMW X3 SERIES E83 Wiring Loom Harness Passenger Side 3508099

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9130313

BMW 3 Series E93 E93N LCI Cabrio Battery Cable Plus Pole 9130313

€227.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6940236

BMW E90 E91 E92 LCI AUX USB Lead Cable Wire 6940236

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1644400937

Mercedes ML W164 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1644400937

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6850846

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9688268580

Citroen C4 Starter Motor Diesel Engine 1.6 HDI Actuator Unit 9688268580

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 04L907309B-3

Skoda Octavia Mk3 5E 1.6 TDI CLHA 105HP Engine ECU Kit Ignition + Key 04L907309B

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9317175

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9317175

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1K0907530AA

Audi A3 8P Body Gateway Module ECU Control Unit 1K0907530AA

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6H52-18C808-BD

Land Rover Freelander II Audio Amplifier Control Module 6H52-18C808-BD

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8572439-3

Engine Control Unit BMW F30 F31 N57N 330d 258HP ECU DDE 8572439 Automatic

€61.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7639661

BMW F20 Alternator Engine Alternator Generator Denso 170A Petrol N55 7639661

€47.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2044402232

Mercedes W204 W207 Battery Cable Positive Wiring Harness Loom A2044402232

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8E0959655G

Air Module Audi A4 B6 B7 ECU Control Unit Crash Sensor Air 8E0959655G

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2124404851

Mercedes W212 Rear Bumper PDC Wiring Parking Sensor Loom Harness A2124404851

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4F0971547

Audi A6 C6 Cable Wiring Loom Heater Matrix Air Conditioning Cable 4F0971547

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8V0857273P

Audi A3 8V Multimedia Display Screen Radio Sat Nav Head Unit 8V0857273P

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586572

Engine Wiring BMW F20 LCI F30 F31 B47 Automatic Gearbox Loom Harness 8586572

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8U0998572A

Audi Q3 8U Headlight Module LED Headlamp Control Unit 8U0998572A

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8R0907364B

Audi Q5 8R A5 8T A4 B8 Active Suspension Module Damping Control Unit 8R0907364B

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9367693

BMW M5 F90 G11 G12 Power Distribution Relay Fuse Box Make Contact 9367693

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8602988

MINI F54 F55 F56 F57 F60 Cable Alternator Starter Wire 8602988

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8U0955559B

Audi A5 8T Windscreen Rain Sensor Control Unit 8U0955559B

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8516739

Mini One D R56 LCI R60 90HP N47N Engine Control Unit ECU DDE 8516739 Manual

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9382401

BMW F30 LCI 330e Hybrid High Voltage Electronics Unit Holder Support 9382401

€37.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. N1WT-14F514-PFD

VW Amarok Mk2 Front Door Wiring Harness Keyless Left Right N/O/S N1WT-14F514-PFD

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8W2035043E

Audi A4 B9 MMI Multimedia Sat Nav Navigation Control Head Unit 8W2035043E

€474.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9367812

Active Sound Design Module BMW F20 F21 F30 Harman Becker Control Unit 9367812

€47.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1698207326

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Front A1698207326

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9317092

Mini One F55 F56 Cable Electric Automatic Hold Brake Handbrake 9317092

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1729009302

Mercedes W212 W221 Media Interface Control Unit Module A1729009302

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9232896

Dashboard Monitor BMW X5 X6 E70 E71 Onboard Display Screen 8,8" 9232896

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7545150-1

BMW X5 E53 3.0i M54 231HP ECU Engine Kit DME 7545150 Automatic Key EWS

€165.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1179001802

Mercedes W176 Air Module Belt Locking System Control Unit Module ECU

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6956020-2

Mini Cooper One Convertible R52 Rear Bumper PDC Wiring Parking Sensor Loom Cable

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1669005417

Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6793850

Adapter Lead Wire BMW F20 F21 F22 F23 F30 F31 F32 F33 VDC Cable Harness 6793850

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2539009309

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

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A6549001300

Glow Plug Relay Mercedes W213 C238 Diesel OM654 Preglow Module A6549001300

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9247472

BMW E87 LCI ECU Body Control Module Junction Box H2 PL2RR 9247472

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1709317

BMW X5 E53 E60 E61 E63 E64 Petrol Engine Ping Knock Sensor 1709317

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2134400200

Mercedes GLC 300e X253 Electric Drive Ground Earth Line Wire A2134400200

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 912034H670

Hyundai H-1 Fuse Box Front Relay Engine Control Unit Module ECU 91203-4H670

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8486547

Mini Cooper F55 F56 Dual-Clutch Transmission Gearbox Control Unit Module DCT

€427.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6906614-1

Mini Cooper One R50 R52 R53 Power Distribution Fuse Box Front 6906614

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 2K5951172

VW Volkswagen Caddy Maxi Interior Roof Alarm Sensor Module Unit 2K5951172

€108.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6956744

BMW 1 3 Series E81 E82 E87 E88 E90 E91 Ultrasonic Sensor PDC Sydney Blue 6956744

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3427743

BMW X3 Series E83 Wiring Drivers Side Loom Front Door Cables Right O/S 3427743

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6915063

Ultra Sonic Module Mini R50 R53 Alarm System Sensor 6915063

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7600020-7

Mini R55 R56 R57 N12 DME Petrol Engine Control Unit ECU 7600020

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6938226-2

BMW 3 Series 2 E90 E91 LCI M3 Wiring Loom Rear Door Left Right 6938226

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5WA959354

VW Volkswagen Golf Mk8 Air Module Control Unit Crash Impact Sensor 5WA959354

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6925642

BMW 5 6 Series E60 E61 E63 Reserve Fuse Carrier Housing 6925642

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5Q0959393

Audi A3 8V Control Unit Central Door Locking Module ECU 5Q0959393

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5C0937819R

Volkswagen Beetle 5C Fuse Box Relay Module Unit 5C0937819R

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. CC1T-10300-BC

Ford Transit Mk7 2.2 TDCi Diesel Engine Alternator Generator Unit CC1T-10300-BC

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6824110

BMW 3 F30 LCI 330e Hybrid High Voltage Battery Wiring Loom Harness 6821420

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

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Showing 1882-1980 of 12466 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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