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. A9060034099

Mercedes-Benz Sprinter W906 Front Right O/S Door Wiring Loom Harness A9060005999

Product currently unavailable

Part no. A1635400841

Mercedes W163 Battery Ground Earth Strap Cable Wiring A1635400841

Product currently unavailable

Part no. A0993200258

Mercedes W213 C238 Air Suspension Valve Block Control Unit Module A0993200258

Product currently unavailable

Part no. A7899823000

Mercedes EQA H243 Relay High Voltage Performance DC 250 A Contactor A7899823000

Product currently unavailable

Part no. A6461541102

Alternator Mercedes Vito W639 Sprinter W906 14V 180A Generator Valeo A6461541102

Product currently unavailable

Part no. A0009829508

Mercedes W205 W213 10Ah 170A Auxiliary Additional Generator Battery A0009829508

Product currently unavailable

Part no. A2098206126

Mercedes W209 Convertible Rain Light Sensor Windscreen Module A2098206126

Product currently unavailable

Part no. A0009006207

Mercedes-Benz A B E W176 W212 W246 Fuel Pump Module Control Unit A0009006207

Product currently unavailable

Part no. A1729008500-1

Mercedes W166 W204 Display Screen Information Navigation Dashboard A1729008500

Product currently unavailable

Part no. A2048704326

Mercedes W204 Door Module Control Unit Module Front Left N/S A2048704326

Product currently unavailable

Part no. A4479007706

Mercedes W447 Door Control Module Front Left N/S A4479007706

Product currently unavailable

Part no. A0061514501-1

Starter Motor Mercedes W204 W212 Sprinter W906 OM651 Diesel Engine A0061514501

Product currently unavailable

Part no. A2139008309

Mercedes W213 Front Seat Control Unit Module ECU A2139008309

Product currently unavailable

Part no. A2709060700

Mercedes W176 Starter Motor 12V Bosch M270 Petrol Engine A2709060700

Product currently unavailable

Part no. A1645402405

Mercedes ML W164 Cable Loom Wiring Parking Sensors Rear Bumper A1645402405

Product currently unavailable

Part no. A6429005601

Mercedes C207 Glow Plug Relay Unit Control Module A6429005601

Product currently unavailable

Part no. A0051511601

Mercedes W168 Vaneo W414 Diesel Engine Speed Starter Motor A0051511601

Product currently unavailable

Part no. A2115455232

Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit A2115455232

Product currently unavailable

Part no. A0009003313

Adblue Module Mercedes W205 W222 W253 Exhaust Gas Control Unit ECU A0009003313

Product currently unavailable

Part no. A6395450003

Mercedes Vito W639 Cover Fuse Box Battery Trim Panel Lid A6395450003

Product currently unavailable

Part no. A1765406109

Wiring Harness Mercedes W176 A45 AMG Petrol M133 Low Temperature Pump Adapter

Product currently unavailable

Part no. A6421501230-1

Mercedes W219 CLS350 CDI OM642.920 Engine Module ECU Kit A6421501230 Key Lock

Product currently unavailable

Part no. B6 787 5877

Mercedes-Benz C-Class W204 Bluetooth Hands-free Mobile Phone Adapter B6 787 5877

Product currently unavailable

Part no. A1635457032

Mercedes ML W163 Module SAM Electronics Control Unit A1635457032

Product currently unavailable

Part no. A2048207785

Mercedes W204 Rear Left Door N/S Control Unit Module A2048207785

Product currently unavailable

Part no. A2464300210

Mercedes-Benz A-Class W176 Brake ABS Pump Holder Bracket Mount A2464300210

Product currently unavailable

Part no. A1669067701

Mercedes ML W166 GLE C292 Relay Current Power Limiter Fuse Box A1669067701

Product currently unavailable

Part no. A2139008828

Air Module Mercedes W213 C238 C253 Control Unit ECU A2139008828

Product currently unavailable

Part no. A0051516501

Mercedes-Benz W203 W210 W220 M112 240 280 320 Engine Starter Motor A0051516501

Product currently unavailable

Part no. A2108200789

Mercedes-Benz E-Class W210 Estate Radio Aerial Antenna Amplifier A2108200789

Product currently unavailable

Part no. A2139006016

Mercedes W213 C238 Air Suspension Level Control Unit Module Airmatic A2139006016

Product currently unavailable

Part no. A6511509000

Mercedes Sprinter W906 Diesel OM651 Engine Wiring Loom Harness A6511509000

Product currently unavailable

Part no. A6519003603-2

Mercedes Sprinter W907 314 CDI OM651.958 143HP ECU Engine Unit A6519003603

Product currently unavailable

Part no. A0009821212

Energy Distributor Mercedes W205 W212 W213 W906 Control Unit Module A0009821212

Product currently unavailable

Part no. A6511530879

Mercedes W906 OM651 Glow Plug Pre Heat Relay A6511530879

Product currently unavailable

Part no. A1769051600-1

Mercedes W176 Front Pressure Impact Crash Sensor Module With Hose A1769051600

Product currently unavailable

Part no. A6398201026

Mercedes Vito W639 Door Front Left N/S Control Unit Module ECU A6398201026

Product currently unavailable

Part no. A1669005012

Mercedes W166 Front Door Module Left N/S Control Unit ECU A1669005012

Product currently unavailable

Part no. A7252701905

Mercedes W213 Mechatronic Automatic Gearbox Control Unit Module A7252701905

Product currently unavailable

Part no. A9069820109-1

Mercedes W907 Positive Battery Terminal Cover Cap Trim Red A9069820109

Product currently unavailable

Part no. A1718600105

Mercedes R171 Seat Air Module Control Unit Front Left N/S A1718600105

Product currently unavailable

Part no. A2115458601-1

Fuse Box Mercedes W211 CLS C219 Rear SAM Module Relay Control Unit A2115458601

Product currently unavailable

Part no. A0999008701

Mercedes W177 Steering Column Control Module A0999008701

Product currently unavailable

Part no. A0028207989-1

Mercedes-Benz C CLK E S Class W210 Changer Player A0028207989

Product currently unavailable

Part no. A1718200626

Mercedes R171 SLK200 Module Front Door Right O/S Control Module Unit A1718200626

Product currently unavailable

Part no. A2078203426

Mercedes W204 C207 Rain Sensor Light Control Unit Front Windscreen A2078203426

Product currently unavailable

Part no. A6549003300

Mercedes W177 Glow Plug Relay Preglow Module Diesel OM654 A6549009900

Product currently unavailable

Part no. A0009003706

Mercedes W207 W212 Parktronic Parking Control Unit Module A0009003706

Product currently unavailable

Part no. A0005427700

Mercedes GLE C292 Coupe Parking PDC Sensor Display Device Unit A0005427700

Product currently unavailable

Part no. A2135400200

Mercedes W205 W213 W238 Fuse Box Cover Control Unit Holder Bracket A2135400200

Product currently unavailable

Part no. A6395450232

Mercedes Vito W639 PDC Parking Distance Control Unit Module ECU A6395450232

Product currently unavailable

Part no. A1669008512

Mercedes GLE 250 AM Tailgate Trunk Control Module Unit A1669008512

Product currently unavailable

Part no. A0018276604

Mercedes W207 Connection Media Interface Cable AUX Wire A0018276604

Product currently unavailable

Part no. A6079002300

Mercedes W176 W246 180 CDI 607.951 109HP Engine Unit ECU Automatic A6079002300

Product currently unavailable

Part no. 6922666

BMW 7 Series E65 Spare Key Fob Emergency Adapter Case Holder Mount Slot 6922666

Product currently unavailable

Part no. A9065451640

Mercedes-Benz Sprinter W906 Fuse Box Unit Holder Bracket Frame A9065451640

Product currently unavailable

Part no. A0131540002

Alternator Mercedes W203 Diesel OM648 OM646 Engine ALternator 200A A0131540002

Product currently unavailable

Part no. A0009829608

Mercedes W204 W212 W222 Auxiliary Additional Generator Battery A0009829608

Product currently unavailable

Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

Product currently unavailable

Part no. A2124401251

Door Cable Mercedes W212 Wiring Loom Front Right O/S Driver Side A2124401251

Product currently unavailable

Part no. A2469009802

Mercedes W176 Radio Control Function Button Knob Controller Unit A2469009802

Product currently unavailable

Part no. A2468200035

Mercedes-Benz A-Class W176 Mikrophone Roof Control Module A2468200035

Product currently unavailable

Part no. A2218707493

Mercedes W221 Seat Control Module Front Right O/S A2218707493

Product currently unavailable

Part no. A2115409910

Mercedes W211 Multimedia Wiring Loom Electrical Harness Cable A2115409910

Product currently unavailable

Part no. A2115420518

Mercedes W211 W219 Earth Ground Cable Battery Wiring Loom Engine A2115420518

Product currently unavailable

Part no. A2139005528

Mercedes W205 W213 Ignition Central Lock Control Unit Module ECU A2139005528

Product currently unavailable

Part no. A0034464110

Mercedes W203 W204 W211 Automatic Gearbox Transmission Control Unit A0034464110

Product currently unavailable

Part no. A0055421918

Yaw Module Mercedes W204 Rotation Rate Acceleration Sensor A0055421918

Product currently unavailable

Part no. A0035429818

Mercedes W203 C209 Yaw Sensor ESP Rotation Rate Control Unit Module A0035429818

Product currently unavailable

Part no. A1715451301

Mercedes R171 Fuse Box Control Unit SAM Module Relay A1715451301

Product currently unavailable

Part no. A1729006903

Seat Module Mercedes W204 W212 Control Unit Front Left Right N/O/S A1729006903

Product currently unavailable

Part no. A2215401682

Mercedes W221 Cover Fuse Box Case Trim Panel Lid A2215401682

Product currently unavailable

Part no. A0025427619

Mercedes-Benz SLS ML G C197 W164 W463 Relay Fuse 5-Pin Green Hella A0025427619

Product currently unavailable

Part no. A6395400431

Mercedes Vito W639 Earth Cable Battery Terminal Wiring A6395400431

Product currently unavailable

Part no. A1695420518-KMG

Mercedes W245 Front Bumper PDC Parking Distance Sensor Comet Grey - 748

Product currently unavailable

Part no. A2048982614

Battery Cover Mercedes W204 W207 Trim Lid Panel A2048982614

Product currently unavailable

Part no. A2469067901-1

Battery Positive Mercedes C117 W176 W246 Plus Pole Terminal Lead A2469067901

Product currently unavailable

Part no. A9065450003-1

Mercedes Sprinter W906 Fuse Box Cover Trim Panel Lid Grey A6395450003

Product currently unavailable

Part no. A0008605903

Mercedes W204 Steering Wheel Air Module Driver's Side Black A0008605903

Product currently unavailable

Part no. A1729006613

Mercedes SLK R172 GPS Navigation System Screen Display A1729006613

Product currently unavailable

Part no. A2045420818

Mercedes-Benz A C W169 W204 Battery Negative Earth Cable Wiring A2045420818

Product currently unavailable

Part no. A0009012604

Mercedes W177 Automatic Gearbox Control Unit Module ECU A0009012604

Product currently unavailable

Part no. A0255453332

Mercedes W202 W210 Engine Cooling Radiator Fan Control Unit Module

Product currently unavailable

Part no. A2215403250

Mercedes W221 Fuse Box Control Unit SAM Module Relay A2215403250

Product currently unavailable

Part no. A2105401031

Mercedes-Benz E-Class W210 Battery Ground Earth Strap Cable Wiring A2105401031

Product currently unavailable

Part no. A2124403758

Mercedes W212 Front Bumper PDC Wiring Parking Sensor Loom Harness A2124403758

Product currently unavailable

Part no. A2059008618

Safety Module Mercedes W205 Airbag SRS Control Module Unit A2059008618

Product currently unavailable

Part no. A2479005807

Mercedes V177 Seat Control Module CSMM Front Right O/S A2479005807

Product currently unavailable

Part no. A0185454132

Mercedes W202 Ignition Engine Control Unit Module C180 M111 Petrol A0185454132

Product currently unavailable

Part no. A0018209726

Mercedes-Benz C CLK Class W203 W209 Airbag Control Unit Module ECU A0018209726

Product currently unavailable

Part no. A1699000500

Mercedes W169 W245 Door Control Module Front Left N/S A1699000500

Product currently unavailable

Part no. A2118705226

Mercedes W211 W219 Navigation Reader DVD CD Player Control Unit A2118705226

Product currently unavailable

Part no. A4475450069

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

Product currently unavailable

Part no. A1729004004-1

Mercedes W204 Display Screen Multifunction Navigation Dashboard A1729004004

Product currently unavailable

Part no. A2056200018

Battery Box Bracket Mercedes W205 W213 W238 Trim Holder Right O/S A2056200018

Product currently unavailable

Part no. A2195406207

PDC Wiring Mercedes W211 W219 Front Bumper Parking Sensor Loom Cable A2195406207

Product currently unavailable

Part no. A2075406010

Mercedes W207 Front Bumper PDC Wiring Parking Sensor Loom Harness A2075406010

Product currently unavailable

Part no. A0005456916

Mercedes W212 CDI Automatic Gearbox Control Module Unit ECU A0005456916

Product currently unavailable

Part no. A1698206726

Mercedes-Benz W245 ECU Control Unit Sensor Module Airbag A1698206726

Product currently unavailable

...

Showing 1585-1683 of 3212 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