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. 6774078-1

BMW Mini Cooper One R50 R53 R55 R56 R57 Input Cylinder Clutch Control 6758825

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8634244

Engine Wiring BMW F45 Mini F60 B38 Loom Harness Injection Valve Ignition 8634244

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A1569057900

Mercedes W176 Aerial Antenna Amplifier A1569057900

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9124585

BMW 1 3 Series E87 E90 Front Rear PDC Ultrasonic Parking Sensor Sedonarot Red

€26.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 5Q0915181E

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181E

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Mini F54 F60 Trailer Towing Control Module Cover Bracket Mounting 6872066

-5%

Part no. 6872066

Mini F54 F60 Trailer Towing Control Module Cover Bracket Mounting 6872066

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 3417586

Electronic Box BMW X3 E83 LCI 2.5si 3.0si N52N Control Unit Mount Holder 3417586

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8577839-1

BMW F32 F33 430d N57N 258HP Engine ECU DDE Kit 8577839 FEM + Key Automatic

€189.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9154329

Mini Clubman R55 Cable Wiring Loom Splitdoor Door Rear Right O/S 9154329

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 2622892

BMW 1 2 Series F20 F21 F22 F23 Control Unit Module Active Sound Design 2622892

€142.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2229006008

Mercedes W205 W217 W222 Tailgate Trunk Control Module Unit A2229006008

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 06J903023H

Volkswagen Golf Mk7 5G Alternator Generator 2.0 TFSI CHHA 06J903023H

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6974372

BMW 7 Series 7 E65 E66 E67 Ultra Sonic Module

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6807322

Positive Cable BMW F90 M5 G30 Battery Wire Lead Underfloor Wiring 6807323

€89.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A0009005517

Mercedes W177 W205 W238 W257 Gearbox Control Unit Module ECU A0009005517

€113.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9210105

BMW 5 Series F07 GT Gran Turismo Door Wiring Loom Cable Harness 9210105

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9111165-PB

BMW E81 E82 E87 E88 E90 E91 Ultrasonic Sensor PDC Platinbronze A53 9111165

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8506373

BMW X3 Series E83 LCI 1.8d N47 Engine Control Unit ECU Module DDE 8506373 Manual

€227.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7520912

BMW E60 E61 E63 E64 LCI Cover Electronic Box 7520912

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 7M0951253A

-5%

Part no. 7M0951253A

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 7M0951253A

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4F0907637A

Audi A6 C6 Yaw ESP Rate Sensor Module Unit Control ECU 4F0907637A

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6974890-MYS

BMW E87 E90 E91 LCI PDC Ultrasonic Parking Sensor Mysticblau Blue - A07

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Audi A4 B8 Door Control Module Unit ECU Rear Left Right N/O/S 8T0959795H

-5%

Part no. 8T0959795H

Audi A4 B8 Door Control Module Unit ECU Rear Left Right N/O/S 8T0959795H

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9218261

Mini Clubman R55 Clubdoor Cable Wiring Loom Harness Set 9154133

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8635815

BMW F20 F30 LCI 118i 318i B38 Gearbox Wiring Loom Harness Cable 8635815

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

AUDI A5 8T 2.0 TDI CGLC Fuse Relay Box Power Distribution 8K0971845A

-5%

Part no. 8K0971845A

AUDI A5 8T 2.0 TDI CGLC Fuse Relay Box Power Distribution 8K0971845A

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9149843

BMW E81 E87 LCI E90 Hands-Free Bluetooth Module High MULF2 9149843

€56.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 04L907309AB-1

Audi Q3 8U 2.0 TDI DFTA 150HP Quattro Engine ECU Kit Ignition + Key 04L907309AB

€161.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7172536

BMW F01 F10 F11 F20 F21 E90 LCI Control Unit Xenon Light 7172536

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6825538

Comfort Module Unit BMW F20 F21 F30 F31 F32 Body Control FEM ECU LR01 6825538

€75.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9890599

BMW F90 M5 G11 G30 Air Module Crash Control Unit 9890599

€189.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A9065410140

Mercedes-Benz Sprinter W906 Battery Tray Holder Mounting Bracket A9065410140

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2229001306

Mercedes W910 Gearbox Module Transmission Basic Control Unit A2229001306

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7191362

BMW 3 E93 Cable Wiring Loom Harness Hydraulic Pump 7120204 7191362

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A6394404906

Mercedes-Benz Vito W639 Loudspeaker Cable Wiring Loom Harness A6394404906

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2215408045

TPM Module Mercedes W221 S500 C216 Tire Pressure System Module RDK A2215408045

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

VW Audi Seat Skoda Glow Plug Relay Unit Engine Supply Black 4 Pins 1K0951253A

-5%

Part no. 1K0951253A

VW Audi Seat Skoda Glow Plug Relay Unit Engine Supply Black 4 Pins 1K0951253A

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8H0959985B

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

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8708259

BMW F20 F21 F30 F31 LCI G30 G31 G11 Navigation Head Unit Sat Nav High 2 8708259

€655.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9286249

BMW 3 Series F30 F31 Rear Door Wiring Loom Cable Harness 9286249

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2711500420

Mercedes W204 M271 Solenoid SOLV Valve Wiring Harness Petrol A2711500420

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4M0941828H

Audi Q7 4M Fuse Box Battery Terminal Cover Housing 4M0941828H

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4H0907601E

Audi S3 8Y 2.0 TFSI DNFF Petrol Engine Sound Noise Actuator 4H0907601E

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4H0907637K

Audi A8L 4H Yaw Rate Domain Control Module Unit ECU 4H0907637K

€222.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A0035422319

Mercedes W176 W246 Relay Battery Decoupling 12V A0035422319

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9208452

Wiring BMW F07 Front Bumper PDC Wiring Park Assist Sensor Harness 9208452

€70.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6819334

BMW F20 F21 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 6819334

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Passenger Seat Module Mercedes W164 W203 W211 Memory Control Unit A2118705026

-5%

Part no. A2118705026

Passenger Seat Module Mercedes W164 W203 W211 Memory Control Unit A2118705026

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A6519007401-2

Mercedes W204 C250CDI Blue Efficiency OM651.911 204HP Engine ECU A6519007401 Key

€189.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A1185402504

Mercedes C118 Door Harness Rear Left N/S Door Wiring Loom A1185402504

€37.95

Free delivery - Tue, Dec 16

If paid before 14:00

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

-5%

Part no. 1K0919283A

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8584817

BMW G20 G21 G01 G02 Wiring Harness Engine Glow Plug Module 8584817

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4F0959793E

VW Volkswagen Tiguan 5N Front Right O/S Door ECU Module Control Unit 4F0959793E

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2208203226

Seat Heating Sensor Mercedes W209 W211 W220 Left N/S Control Unit A2208203226

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6938221

BMW 3 Series E90 E91 Wiring Loom Front Door Left Passenger Side 6938221

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2079002800

Mercedes W207 Convertible Door Module Front Right O/S Control Unit A2079002800

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2036901430

Mercedes C CLC Class CL203 W203 Rear SAM Unit Fuse Box Trim Cover A2036901430

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7608801

Valve Cable BMW F20 F21 F30 F31 Petrol N13 Valve Tronic Wiring Harness 7608801

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 5Q0919294K

Audi RS3 8V PDC Parking Distance Control Sensor Module Unit ECU 5Q0919294K

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8Y0035042C

Audi S3 8Y Body Control Comfort Module ECU Unit Bluetooth 8Y0035042C

€1,139.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4E0910217C

Audi Q7 4L Front Camera FAS Lane Assistance Control Unit 4E0910217D

€56.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8617551-5

BMW F20 F21 125i N20 218HP ECU Control Unit Kit DDE 8617551 Key FEM Automatic

€474.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7856819

Battery Cable BMW F90 M5 F91 M8 Wire Lead Positive Alternator Starter B+ 7856819

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8N8035223A

Audi TT 8N Amplifier BOSE Premium Audio Sound System Module 8N8035223A

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7222633

BMW E90 E91 LCI Flat Cable Wiring Wire CAS Start Stop ECU Loom 7222633

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

VW Volkswagen Audi Skoda Seat Little Fuse Amp 30A 12V 443937105A

-5%

Part no. 443937105A

VW Volkswagen Audi Skoda Seat Little Fuse Amp 30A 12V 443937105A

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9326437

BMW F30 F31 Wiring Passenger Loom Front Door Cables Harness 9286241

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9340998

BMW 1 2 Series F21 F22 Wiring Passenger Side Loom Front Door Left N/S 9340998

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 8617709

BMW Mini Cooper F55 F56 Wiring Harness Motor Sensorsystem Module 8617709

€113.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 3453954

Mini Cooper One R57 R58 Aerial Antenna Amplifier Diversity Module 3453954

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 6932644-1

BMW 3 5 Series E60 E71 E90 E92 Suppression Filter Aerial Module Antenna 6932644

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Windscreen Camera Mercedes W207 W221 Front Windshield Module Unit A0009058000

-5%

Part no. A0009058000

Windscreen Camera Mercedes W207 W221 Front Windshield Module Unit A0009058000

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2048210197

Door Cable Guide Mercedes W204 Front Wiring Loom Harness Channel A2048210197

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9286236

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

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2118206185

Mercedes E S Class W211 W220 Telephone Hands Free Control Module A2118206185

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9134668

Seat Control Unit BMW E90 E91 E92 Seat Module Unit Controller ECU 9134668

€56.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 04L907309R-3

Audi A3 8V VW Golf VII 2.0 TDI 150HP CRLB Engine Unit ECU Kit 04L907309R Manual

€132.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A2055401542

Mercedes W205 Rear Door Harness Wiring Cable Left Right N/O/S A2055401542

€61.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. MB3G-12B565-FB

VW Amarok Mk2 Automatic Gearbox Transmission Control Module Unit MP3P-14F106-AA

€118.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9244429

BMW X6 Series E71 Rear Bumper PDC Cables Wiring Loom Set 9244429

€56.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9142218

BMW X3 E83 LCI PDC Parking Ultrasonic Sensor Silver Grey 9142218 9139866

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7E0907655A

Audi TT 8J ESP YAW Lateral Acceleration Sensor 7E0907655A

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9364669

BMW F10 F11 LCI Active Sound Unit Control Module Design Amplifier 9337754

€61.95

Free delivery - Tue, Dec 16

If paid before 14:00

Audi A6 C6 Front Door Left N/S Module Unit Control ECU 4F0959792R

-5%

Part no. 4F0959792R

Audi A6 C6 Front Door Left N/S Module Unit Control ECU 4F0959792R

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7835872

BMW 5 Series E60 E63 E64 Carrier Holder Amplifier/Video Module Fairing EDC

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 5WB959107B

Audi Q2 GA Rear Boot Trunk Lid Tailgate Control Unit Module ECU 7367747

€70.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A6519000700-3

Mercedes W906 310 CDI OM651.955 95HP Engine Unit ECU Kit A6519000700 Key Lock

€393.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 7P0941828B

Volkswagen Touareg 7P 3.0 TDI Fuse Box Control Module 7P0941828B

€32.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 510971693J

Volkswagen Golf Sportsvan Door Harness Rear Left N/S Door Wiring Loom 510971693J

€28.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 2990911

BMW X1 Series E84 Carrier Bracket Holder Control Module Unit 2990911

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 5P0951171C

Seat Altea 5P1 Interior Ultrasound Alarm Sensor Module Unit 5P0951171C

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

2 x BMW E63 E64 E93 Alarm System Module Sensor DWA Control Unit Set 6950525

-5%

Part no. 6950525-1

2 x BMW E63 E64 E93 Alarm System Module Sensor DWA Control Unit Set 6950525

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Audi A3 8V Rear Left Right N/O/S Door Card Wiring Loom Harness 8V4971693

-5%

Part no. 8V4971693F

Audi A3 8V Rear Left Right N/O/S Door Card Wiring Loom Harness 8V4971693

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A0009058100

Mercedes ML W166 GL X166 SL R231 C292 Crash Impact Sensor A0009058100

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Retaining Plate Mercedes W205 Relay Fuse Box Holder Bracket A2055463100

-5%

Part no. A2055463100

Retaining Plate Mercedes W205 Relay Fuse Box Holder Bracket A2055463100

Promo price

€23.95

€22.75

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 4L0919614B

Audi Q7 4L Navigation Multimedia Control Panel Knob Unit 4L0919614B

€550.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. A0035421619-1

Mercedes W177 Relay 052 Fuse Box Relay Slot B D E 70A Tyco SET X2 A0035421619

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 1S0919275D-MRE

Audi A5 8T PDC Parking Distance Control Sensor 1S0919275D Misano Red Pearl - Z3M

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

Part no. 9267456

Control Unit BMW F10 F11 Body Module ECU JBBFE IIIR V2 PL6 ECU 9267456

€23.95

Free delivery - Tue, Dec 16

If paid before 14:00

...

Showing 100-198 of 11924 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