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.

More information

Make

Category

Subcategory

Condition

In Stock

Price

Products in promotion

Part no. 4H0959651A

Audi A1 A6 A7 Impact Crash Control Sensor Module ECU 4H0959651A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1695405645

Mercedes W169 SAM Control Module Fuse Box Unit A1695405645

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1665402709

Mercedes W166 Automatic Gearbox Wiring Loom Harness Cable A1665402709

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8582279-4

BMW F30 320d ed Diesel N47N 163HP Engine Control Unit ECU DDE 8582279 Manual

€99.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2219050018

Mercedes-Benz S-Class W221 Headlining Alarm Sensor Module Cover Trim A2219050018

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059006615

Mercedes W205 Windscreen Rain Sensor Front Control Unit A2059006615

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 237104376R

Mercedes Citan W415 109 CDI OM607.951 Engine Control Unit ECU 237104376R Manual

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959792A

Audi A5 8T Door Control Module Front Left N/S 8K0959792A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6820526

Head Unit BMW F20 F21 Radio Media GPS Sat Navigation Unit 6820526

€142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0907468M

Audi A5 8T Central Gateway Module ECU Control Unit Lear 8T0907468M

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907401-1

Audi A5 8T 3.0TDI CAPA Quattro 240HP Engine ECU Kit Ignition 8K0907401 + Key

€227.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8T0035225J

Audi A5 8T Antenna Aerial Amplifier Module Control Unit 8T0035225J

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2479052503

Mercedes Sprinter W910 Remote Key Control Unit A2479052503

€94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A9075406960-1

Mercedes Sprinter W907 Fuse Box Prefuse Box Module F150/1 - MFB-1 A9075406960

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A9076830400

Mercedes W907 Fuse Box Relay Cover Lid Control Unit Bracket Trim A9076830400

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907279

Audi A5 8T Gateway Convenience Body Module Control Unit ECU 8K0907279C

€23.95

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

€1,139.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2078205489

Mercedes-Benz W207 A207 Left Right A-Pillar Radio Aerial Antenna Amplifier Unit

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3449686

Mini Cooper R55 R56 R57 Passive Go Module Control Unit 3449686

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6C1T-11000-AB-1

Ford Transit Mk7 Starter Motor Engine Actuator Diesel 2.2 TDCi 6C1T-11000-AB

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 02M911023M

Volkswagen VW Golf Mk5 1.6 2.0 GTI Petrol Engine Starter Motor 02M911023M

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0035420219-1

Relay Mercedes W639 W906 5-Pin Black 12V 20A A0035420219 Set X2

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0025422619-3

Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V A0025422619

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0907357

Audi A3 8V Headlight Head Light Lamp Range Control Unit Module ECU 5Q0907357

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0035874B

Audi A3 8V Multimedia Radio Sat Nav CD Player Head Unit 8V0035874B

€237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0025422619-2

Mercedes ML W163 Relay 4-Pin Grey Tyco Set Kit A0025422619

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. EXHAUST-FLAP-CONTROL

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2741504704

Mercedes X253 Engine Wiring Harness Line Supply Line A2741504704

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9196929

Seat Control Module BMW E60 E61 ECU Seat Controller Unit Module 9196929

€61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8582719-1

Mini F55 F56 Cooper D B37 Diesel Engine ECU Kit DDE 8582719 BDC + Key Manual

€408.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9362351

Head Unit Mini F55 F56 BMW F45 i3 I01 Radio DAB Media Player Unit 9362351

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8578945-4

BMW F20 F21 F30 116d 316d N47N 116HP ECU Engine Contol Unit DDE 8578945 Manual

€66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8631727-3

BMW Z4 E89 Roadster 18i N20 156HP ECU Kit DME CAS3 + Key 8631727 Manual

€569.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03E971815A

Volkswagen Polo 6R Cover Wiring Loom Guide Bracket Trim 03E971815A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. E93-RADIO

BMW E93 Head Unit Radio Player Navigation Control Module 5A2BF31

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2188200187

Mercedes W221 Multimedia Interface USB Adapter Port Socket A2188200187

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3437180

BMW E83 Telephone Bluetooth Roof Aerial Module Control Unit 3437180

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129008825

Mercedes C204 Fuse Box Control Unit SAM Module Relay A2129008825

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0019820823

Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0025421419-1

Relay Mercedes W163 W169 W203 W210 Relay Unit 5-Pin Yellow Tyco A0025421419

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0025421319-4

Mercedes W204 Genuine Universal Car Relay 4-Pin Tyco X4 Black A0025421319

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 06A903143P

Audi TT 8N Alternator Bracket Mount Holder 06A903143P

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2128270228-PAL

Mercedes W212 Aerial Fin Roof Antenna Shark Palladium Silver - 792 A2128270228

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

€142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5N0035552K

VW Tiguan 5N Antenna Amplifier Module Control Right O/S Unit 5N0035552K

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6429004201

Mercedes W221 BlueTec Exhaust Gas Aftertreatment Control Unit Module A6429004201

€151.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A4478260000

Mercedes Vito W447 Headlight Turn Indicator Light Socket Plug A4478260000

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3C0937125A

Volkswagen Tiguan 5N Engine Bay Fuse Relay Box Terminal 3C0937125A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2215400205

Mercedes W221 Brake Pad Wear Indicator Sensor Front Left Right N/O/S A2215400205

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0045467540

Mercedes W204 W221 Distributor Box Block Control Unit Relay A0045467540

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2055455100

Mercedes W205 W213 C238 Power Distribution Unit Busbar Connector A2055455100

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5WA971794R

VW Golf 8 1.5 eTSI HV Battery Positive Terminal Harness Cable Wiring 5WA971794R

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2229001912

Mercedes W205 C253 Door Module Rear Left N/S Control Unit ECU A2229001912

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8P0959655J

Audi A3 E 104 T Air Module ECU Sensor Control Unit 8P0959655J

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8519663-24

Mini Cooper SD R55 R56 LCI R60 N47N 143HP Engine ECU DDE 8519663 Automatic

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A0009821923-1

Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relays Set A0009821923

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1695406945

Mercedes SLK R171 Gateway Control Unit Gateway Module ECU A1715405145

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2074401208

Mercedes W207 Parking Sensor Wiring Loom Cable Harness Rear PDC

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2469008115

Mercedes W176 W246 Gearbox Transfer Case Control Module Unit ECU A2469008115

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9315152

BMW X3 F25 Fuse Box Grouping Map Diagram Location 9315152

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1669004002

Door Module Mercedes C117 W176 W246 Front Left N/S Control Unit A1669004002

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059000219

Mercedes C117 W176 W205 Telematics Module Communication Control Unit A2059000219

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1408207126

Mercedes C140 Blinker Hazard Trailer Relay Module Control Unit A1408207126

€227.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8796289

BMW X3 G01 X4 G02 X5 G05 Battery Terminal Negative Cable Wire Wiring 8796289

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 02M911024Q

Volkswagen Golf VI Passat B6 Tiguan Starter Motor Diesel Engine 02M911024Q

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2319009106

Door Module Mercedes R231 Front Door Right O/S Control Module A2319009106

€47.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6C0959653

VW Polo 6R Seat Ibiza 6J Clock Spring Steering Column Squib Ring 6C0959653

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2213201058

Mercedes R231 Valve Block Air Suspension Control Unit A2123200358

€203.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 50325-MAL-600

Honda CBR F3 Battery Box Tray Covering Housing Trim Holder Bracket 50325-MAL-600

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2319014702

Mercedes R231 Air Module Control Unit ECU SRS Module A2319014702

€284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8X0971687C

Audi A1 8X Rear Door Harness Left N/S Wiring Loom Cable 8X0971687C

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8X0971693A

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7L0937576B

Audi Q7 4L Fuse Box Trim Cover Panel Electrical Unit Housing 7L0937576B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9315684

BMW F20 F21 F30 F31 F32 Body Control Comfort Module Unit FEM ECU LR01 9315684

€94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7M0951253C-1

VW Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7H0907652A

Audi Q7 4L Yaw Rate Speed Sensor Module 7H0907652A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959655C

Audi Q7 4L Air Module Control Unit ECU Impact Sensor 4L0959655C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0907468B

Audi Q7 4L Gateway Module Central Control Unit 4L0907468B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1S0919275-PHB

Audi A3 8P PDC Parking Distance Control Sensor Module Unit ECU Phantom Black Z9Y

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959795B

Audi Q7 4L Door Control Module Unit ECU Rear Left N/S 4L0959795B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959794B

Audi Q7 4L Door Control Module Electrical Unit ECU Rear Right O/S 4L0959794B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0907247A

Audi Q7 4L Keyless Entry Amplifier Control Box Module Aerial Antenna 4F0907247A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8H0959985B

Audi Q7 4L Keyless Module ECU Door Lock Control Unit 8H0959985B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959793B

Audi Q7 4L Front Door Module Driver Right O/S Side Control Unit 4L0959793B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7L0864643B

Battery Cover Audi Q7 4L VW Touareg 7P Porsche Cayenne 9PA Top Cap 7L0864643B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0907290

Audi Q7 4L Gateway Convenience Module Unit Control ECU 4L0907290

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959651B

Audi A3 8V Front Impact Sensor Crash Detection Module Unit 5Q0959651B

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0035398A

Audi A3 8V A-Pillar Speaker Tweeter Front Left Right N/O/S 8V0035398A

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 81A035502

Audi A3 8V Wireless Charger Centre Console Phone Charging Module Unit 81A035502

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4L0959792B

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4F0907280E

Audi Q7 4L On Board Power Supply Control Module Unit ECU 4F0907280E

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K0906093G

Audi A1 8X VW Seat Skoda Fuel Pump Control Unit Module 1K0906093G

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8X0959673

Audi A1 8X Windscreen Heating Control Switch 8X0959673

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 02T911023S

Starter Motor Seat Ibiza 6J VW Volkswagen Polo 6R 1.2 Petrol Engine 02T911023S

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2189006806

Mercedes W207 Harman Control Unit Module Amplifier Premium Sound A2189006806

€631.95

Free delivery - Tue, Nov 25

If paid before 14:00

...

Showing 1288-1386 of 11783 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 .

used parts volkswagen car parts mercedes used car parts cheap car parts audi auto parts spare parts genuine used audi parts bmw starters, alternators, ecus & wiring mercedes starters, alternators, ecus & wiring mini starters, alternators, ecus & wiring audi starters, alternators, ecus & wiring volkswagen starters, alternators, ecus & wiring