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. A6399005400-2

Mercedes Vito W639 Fuse Box Relay Control Unit Electric Module SAM A6399005400

Product currently unavailable

Part no. A9068200886

Radio Head Mercedes Vito W639 Sprinter W906 CD Audio Stereo Unit A9068200886

Product currently unavailable

Part no. A2098203026

Mercedes CLK W209 Convertible Rain Light Sensor Windscreen Module A2098203026

Product currently unavailable

Part no. A1779006604

Airbag Module Mercedes C118 W177 W247 Front Air Bag Control Unit ECU A1779006604

Product currently unavailable

Part no. A1729008412

Mercedes SLK R172 Roadster Folding Vario Roof Control Module A1729008412

Product currently unavailable

Part no. A0009059300-CVB1

Mercedes W205 W212 W246 Parking Distance Sensor Set x2 Cavansite Blue - 890

Product currently unavailable

Part no. A1665400224

Mercedes W166 C292 Fuse Relay Box Cover Trim Panel Lid Housing A1665400224

Product currently unavailable

Part no. A2198201926

Door Module Mercedes C219 Front Door Left N/S Control Module A2198201926

Product currently unavailable

Part no. A9075406960

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

Product currently unavailable

Part no. A2539052100

Mercedes GLC C253 X253 Pedestrian Protection Pressure Crash Sensor A2539052100

Product currently unavailable

Part no. A0005429523

Mercedes-Benz C CLK W202 W208 Left N/S Parking System Warning Display Screen

Product currently unavailable

Part no. A2038201311

Phone Adapter Mercedes W203 W211 Contact Plate Holder Telephone A2038201311

Product currently unavailable

Part no. A0035452405

Relay Mercedes W124 E280 Petrol Fuel Pump Cut Off Relay A0035452405

Product currently unavailable

Part no. A0009060086

Mercedes W205 Control Unit Power Distribution Box Electrical A0009060086

Product currently unavailable

Part no. A1685453532

Mercedes W168 ESP + HBA Electronic Stability Program Control Module A1685453532

Product currently unavailable

Part no. A2701504400

Mercedes W176 M270 Petrol Engine Wiring Harness Loom Cable A2701504400

Product currently unavailable

Part no. A0008206926

Acceleration Sensor Mercedes S124 R129 Front Seat Belt Locking Retractor Module

Product currently unavailable

Part no. A1648220230

Mercedes W164 W212 Alarm Sensor Warning Buzzer Module Unit A1648220230

Product currently unavailable

Part no. A1718206526

Mercedes SLK R171 Air Module System Control Unit ECU A1718206526

Product currently unavailable

Part no. A2035453401

Mercedes C CLK Class W203 C209 Sam Control Module Fuse Box Rear A2035453401

Product currently unavailable

Part no. A2218207510

Mercedes W221 Anti Theft Roof Alarm Ultrasonic Motion Sensor Unit A2218207510

Product currently unavailable

Part no. A2479001608

Module Mercedes W177 W247 Instrument Cluster Control Module A2479001608

Product currently unavailable

Part no. A1775404307

Fuse Box Mercedes C118 W177 W247 Engine Compartment Relay Box Module A1775404307

Product currently unavailable

Part no. A2048208185

Rain Sensor Mercedes W204 Light Solar Condensation Control Unit A2048208185

Product currently unavailable

Part no. A2198202326

Mercedes CLS W219 Door Module Front Left N/S Control Unit Module A2198202326

Product currently unavailable

Part no. A0049820008

Mercedes W166 W221 Auxiliary Additional Generator Battery A0049820008

Product currently unavailable

Part no. A6549061500

Starter Mercedes W204 C238 W213 W447 Diesel OM654 Starter Motor A6549061500

Product currently unavailable

Part no. A2115459001

Fuse Box Mercedes W211 W219 Junction Relay Control Unit Module SAM A2115459001

Product currently unavailable

Part no. A6399005400

Mercedes Vito W639 Fuse Box Relay Control Unit Electric Module SAM A6399005400

Product currently unavailable

Part no. A2113231226

Mercedes-Benz E Class W211 Front Right Anti Roll Bar Clamp Bracket A2113231226

Product currently unavailable

Part no. A2479006804

Mercedes W205 Multi-Purpose Windscreen Camera Control Unit Module A2479006804

Product currently unavailable

Part no. A2045450369

Mercedes S204 Fuse Box Terminal Connection Unit A2045450369

Product currently unavailable

Part no. A6461502720

Mercedes Vito W639 OM646 Diesel Engine Wiring Cable Loom Harness A6461501388

Product currently unavailable

Part no. A0009062302

Starter Motor Mercedes W639 W906 Diesel Engine A0009062302

Product currently unavailable

Part no. A6385450319

Mercedes W639 W638 W906 Fuse Box Unit Holder Bracket Frame A6385450319

Product currently unavailable

Part no. RHD-A1669005212

Mercedes ML W166 Front Door Module Right O/S Door Control Unit A2059006013

Product currently unavailable

Part no. A2139004409

Mercedes W213 Door Module Front Right O/S Control Unit A2139004409

Product currently unavailable

Part no. A2138203202

Mercedes W213 Bluetooth Module Multimedia Control Unit ECU A2138203202

Product currently unavailable

Part no. A2045453901

Mercedes W204 Fuse Box Relay Control Unit Electric Module SAM A2045453901

Product currently unavailable

Part no. A0038208286

Mercedes W140 Head Unit Radio Player Control Module Becker A0038208286

Product currently unavailable

Part no. A6461540002

Mercedes Sprinter W906 OM646 Engine Diesel Alternator Generator A6461540002

Product currently unavailable

Part no. A2139009022

SRC Module Mercedes W213 Air Safety Module SRS Control Unit ECU A2139009022

Product currently unavailable

Part no. A6399002900

Mercedes Vito W639 Door Module Front Left N/S Control Unit ECU A6399002900

Product currently unavailable

Part no. A1669000220

Mercedes GLE C292 Coupe Air Control Module Unit Bosch SRS A1669000220

Product currently unavailable

Part no. A2045455401

Mercedes W204 Fuse Box Relay Control Unit Electric Module SAM A2045455401

Product currently unavailable

Part no. A0355400445

Mercedes W204 W212 W221 AMG Fuel Pump Module Control Unit ECU A0355400445

Product currently unavailable

Part no. A2139008409-1

Seat Module Mercedes C238 Front Right Seat Control Unit A2139008409

Product currently unavailable

Part no. A1669008606-1

Seat Module Mercedes W176 W246 Front Left N/S Memory Control Unit A1669008606

Product currently unavailable

Part no. A0061511001

Starter Motor Mercedes W906 M272 Engine Diesel Bosch A0061511001

Product currently unavailable

Part no. A1669006311

Mercedes W166 Tailgate Control Module Unit A1669006311

Product currently unavailable

Part no. A0009067900-2

Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A A0009067900

Product currently unavailable

Part no. A0165459632

Mercedes C140 W202 Engine Cooling Radiator Fan Control Unit Module A0165459632

Product currently unavailable

Part no. A2115459232

Parktronic Module Mercedes W211 PDC Parking Sensors Control Unit A2115459232

Product currently unavailable

Part no. A6397600704

Mercedes Vito W639 Front Left Door N/S Lock Bowden Pull Cable A6397600704

Product currently unavailable

Part no. A1645402372-1

Mercedes W164 W251 Fuse Box Fuse And Relay Module Rear Unit A1645402372

Product currently unavailable

Part no. A2118703889

Mercedes W164 W169 W211 W245 W906 6 Disc CD Changer Player A2118703889

Product currently unavailable

Part no. A2711500620

Engine Wiring Mercedes W204 C207 W212 M271 Harness Loom Cable A2711500620

Product currently unavailable

Part no. A6395400050

Mercedes Vito W639 Battery Terminal Fuse Box Control Unit Module A6395400050

Product currently unavailable

Part no. A2059007147

Mercedes C205 Control Body Comfort Module Unit ECU A2059007147

Product currently unavailable

Part no. A1665420318

Battery Cable Mercedes W169 W211 Negative Lead Wiring Pole Harness A1665420318

Product currently unavailable

Part no. A1645404601

Mercedes ML W164 Control Unit Module Fuse Box SAM A1645404601

Product currently unavailable

Part no. A2711540902

Alternator Generator Mercedes W203 W209 M271 Engine Valeo 120A 14V A2711540902

Product currently unavailable

Part no. A2118702885

Mercedes W211 Door Module Front Right O/S Control Unit ECU A2118702885

Product currently unavailable

Part no. A1648703726

Seat Module Mercedes X164 Rear Third Row Seats Control Module A1648703726

Product currently unavailable

Part no. A2218706586

Mercedes W221 Front Door Control Module Unit Left N/S ECU A2218706586

Product currently unavailable

Part no. A6519007401-8

Mercedes C204 C250CDI OM651.911 204HP BlueEFFICIENCY Engine ECU Unit A6519007401

Product currently unavailable

Part no. A1765400009

Negative Cable Mercedes C117 W176 Battery Lead Minus Pole Wiring A1765400009

Product currently unavailable

Part no. A2118210097

Mercedes E-Class W211 Front Door Wiring Loom Harness Rubber Grommet A2118210097

Product currently unavailable

Part no. A1698208326

Mercedes-Benz W169 W245 Door Module Front Left N/S Control Unit A1698208326

Product currently unavailable

Part no. A1679001414

Head Unit Mercedes W167 W177 Audio Stereo Radio Player Control Unit A1679001414

Product currently unavailable

Part no. A2115456101

Mercedes W211 SAM Module Fuse Box Relay Control Unit A2115456101

Product currently unavailable

Part no. A0045428718

Mercedes-Benz C E W203 W211 Parking Sensor Wiring Loom Cable Harness Front PDC

Product currently unavailable

Part no. A1679004811

Door Module Mercedes W205 Rear Right O/S Door Control Module A1679004811

Product currently unavailable

Part no. A0111548402

Alternator Generator Mercedes W203 M111 Petrol Engine Valeo 120A A0111548402

Product currently unavailable

Part no. A0065427018

Yaw Module Mercedes W221 ML W164 Rotation Rate Acceleration Sensor A0045423818

Product currently unavailable

Part no. A2479061803-1

Mercedes W177 W247 Battery Fuse Box Positive Distribution Terminal A2479061803

Product currently unavailable

Part no. A1729000402

Seat Control Module Mercedes A172 A190 A197 A207 A231 ECU Unit A1729000402

Product currently unavailable

Part no. A2218708826

Mercedes W203 W221 Wind Screen Wind Shield Rain Sensor Unit A2218708826

Product currently unavailable

Part no. A1698203775

Mercedes W169 W245 Aerial Roof Antenna Radio Control Unit Module A1698203775

Product currently unavailable

Part no. A2038200389

Mercedes CL203 Radio Aerial Antenna Amplifier Wiring Cables A2038200389

Product currently unavailable

Part no. A0994644206

Mercedes X253 Steering Wheel Contact Switch Control Plate A0994644206

Product currently unavailable

Part no. A2045407435

Earth Ground Cable Mercedes W204 C207 W212 Line Strap Battery Lead A2045407435

Product currently unavailable

Part no. A2118706189

Mercedes W164 W169 W211 W245 Disc CD Changer A2118706189

Product currently unavailable

Part no. A0009015303

Fuel Pump Control Mercedes C118 C167 W177 W247 Module ECU Receiver A0009008214

Product currently unavailable

Part no. A1648209289-1

Mercedes ML W164 Audio 20 Stereo Radio CD Head Unit Player A1648209289

Product currently unavailable

Part no. A2218702292

Mercedes W221 C216 Keyless Go Easy Entry Control Module 433Mhz A2218702292

Product currently unavailable

Part no. A2135402045

Mercedes W213 Center Console Cupholder Lamp Wiring Harness A2135402045

Product currently unavailable

Part no. A2118704085

Seat Module Mercedes W203 W211 Control Unit Front Left Right N/O/S A2118704085

Product currently unavailable

Part no. A1635401208

Mercedes-Benz ML-Class W163 Inboard Cable Harness Wiring A1635401208

Product currently unavailable

Part no. 96647952XT

Peugeot 3008 USB AUX Connector Interface Adapter Port Socket 96647952XT

Product currently unavailable

Part no. A0009008129-1

PDC Module Mercedes W177 Parktronic Parking Assist Control Module A0009008129

Product currently unavailable

Part no. A2308204226

Mercedes-Benz C M Class W163 W203 Motorola Telephone Control Module A2308204226

Product currently unavailable

Part no. A1635422318

Mercedes ML W163 Yaw Rate Sensor Turn Rate Speed Module A1635422318

Product currently unavailable

Part no. A4479009609

Mercedes Vito W447 Fuse Box Relay Control Unit Electric Module SAM A4479009609

Product currently unavailable

Part no. A0025428918

Mercedes-Benz C M Class W163 W203 ESP Yaw Rotation Rate Sensor A0025428918

Product currently unavailable

Part no. A0111547202

Mercedes-Benz W203 M111 C 200 230 K Bosch Alternator Generator A0111547202

Product currently unavailable

Part no. A6071500133

Engine Wiring Mercedes W176 W246 Diesel OM607 Loom Harness Cable A6071500133

Product currently unavailable

Part no. A6541500800

Mercedes W177 W213 Engine Wiring Harness Loom E220d Diesel A6541500800

Product currently unavailable

Part no. A2048704658

Mercedes W204 Radio Control Function Button Knob Controller Unit A2048704658

Product currently unavailable

...

Showing 1882-1980 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