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. A2035400031

Mercedes CLK W203 C209 Negative Battery Terminal Cable A2035400231

Product currently unavailable

Part no. A2049017801

Mercedes W204 W212 Windscreen Rain Sensor Control Unit A2049017801

Product currently unavailable

Part no. A0045429118

ECU Module Mercedes W169 W211 W245 Yaw Rate Sensor Unit ESP A0045429118

Product currently unavailable

Part no. A0025422519

Mercedes W168 W169 W245 Blue Relay 4-Pin Tyco A0025422519

Product currently unavailable

Part no. A1695420018-PS

Mercedes-Benz W169 Front Bumper Parking Distance Sensor Parktronic Polar Silver

Product currently unavailable

Part no. A0009822023

Mercedes W204 W212 W221 Battery Relay Module Unit A0009822023

Product currently unavailable

Part no. A0001501780

Ignition Coil Mercedes W202 W203 M111 Cable Connector A0001501780

Product currently unavailable

Part no. A2049014504

Rain Sensor Mercedes W204 W212 Windscreen Control Unit A2049014504

Product currently unavailable

Part no. A0005428418

Mercedes A B C Class W169 W203 W245 Outside Air Temperature Sensor A0005428418

Product currently unavailable

Part no. A0009820012

Mercedes W176 W212 W246 Voltage Converter Power Distributor Inverter

Product currently unavailable

Part no. A2079010600

Rain Sensor Mercedes W204 W212 Light Solar Condensation Control Unit A2079010600

Product currently unavailable

Part no. A9068201186

Mercedes Vito W639 Sprinter W906 CD Audio Stereo Radio Head Unit A9068201186

Product currently unavailable

Part no. A0005405624

Fan Wiring Mercedes W639 W906 Heater Blower Unit Motor Cable Harness A0005405624

Product currently unavailable

Part no. A2466280041

Mercedes-Benz A B Class W176 W246 Battery Holder Mount Bracket A2466280041

Product currently unavailable

Part no. A2661540802

Mercedes-Benz W169 W245 Alternator Generator Petrol 90A A2661540802

Product currently unavailable

Part no. A0051512101

Mercedes W168 W169 W245 Petrol Engine Starter Motor A0051512101

Product currently unavailable

Part no. A0009057802

Crash Impact Sensor Mercedes C118 W177 W205 W247 Acceleration Unit A0009057802

Product currently unavailable

Part no. A0061510301

Mercedes W169 W245 Petrol Engine Starter Motor M266 A0061510301

Product currently unavailable

Part no. A1665420018

Battery Cable Mercedes W176 Negative Lead Wiring Harness Control A1665420018

Product currently unavailable

Part no. A2478204102

Mercedes W907 Aux USB Port Socket A2478204102

Product currently unavailable

Part no. A2518206510

Mercedes W212 Light Sensor Sunlight Sensor Front A2518206510

Product currently unavailable

Part no. A0025428319

Mercedes W176 W204 C207 W212 C218 W246 Relay 4-Pin Black Hella 12V A0025428319

Product currently unavailable

Part no. A9065403527

Positive Cable Mercedes W906 OM651 Battery Starter Alternator Plus A9065403527

Product currently unavailable

Part no. A1698700689

Mercedes W169 W245 CD Player Radio Stereo Head Unit A1698700689

Product currently unavailable

Part no. A9069001002

Mercedes Sprinter W906 Parking Control Unit Module Sensor PDC A9069001002

Product currently unavailable

Part no. A1769051600

Mercedes W176 Front Pressure Impact Crash Sensor Unit Module

Product currently unavailable

Part no. A6397601704

Bowden Cable Mercedes W639 Rear Sliding Door Exterior Handle Wire A6397601704

Product currently unavailable

Part no. A1648203085

Mercedes ML W164 Window Windscreen Rain Light Sensor A1648203085

Product currently unavailable

Part no. A2469069600

Mercedes W176 W246 Backup Battery Negative Minus Terminal Lead A2469069600

Product currently unavailable

Part no. A1695420018-PLS

Mercedes W169 Front Bumper Parking Distance Sensor Parktronic Polar Silver 761

Product currently unavailable

Part no. A0009067900

Alternator Mercedes W204 W212 Diesel Engine OM651 Valeo 180A A0009067900

Product currently unavailable

Part no. A9064461442

Mercedes Sprinter W906 ECU Control Unit Sensor Module A9064461442

Product currently unavailable

Part no. A2215420417-MB

Parking Sensor Mercedes W169 W204 W212 PDC Sensor Front Mountain Gray 787

Product currently unavailable

Part no. A0065424218

Mercedes Sprinter W906 Turn Rate Sensor Module Control Unit A0065424218

Product currently unavailable

Part no. A0009063822

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

Product currently unavailable

Part no. A1775407932

Mercedes W177 W247 Positive Battery Cable Lead Wire Starter A1775407932

Product currently unavailable

Part no. A2229001614

Module Mercedes C205 Front Door Right O/S Control Module Unit A2229001614

Product currently unavailable

Part no. A9066880008

Mercedes W906 Cover Footwell Fuse Box Trim OBD Grey A9066880008

Product currently unavailable

Part no. A6395450191

Mercedes Vito W639 Positive Battery Terminal Cover Cap Trim Red A6395450191

Product currently unavailable

Part no. A9065400113

Mercedes-Benz Sprinter W906 Rear Door Licence Plate Lighting Wiring Cable

Product currently unavailable

Part no. A0025424419

Mercedes Vito W639 Coolant Radiator Fan Relay Control Module A0025424419

Product currently unavailable

Part no. A0035421819

Mercedes C205 Fuse Box Relay Control Unit Module A0035421819

Product currently unavailable

Part no. A0131541002

Mercedes-Benz Vito Viano W639 Alternator Generator Diesel 200A A0131541002

Product currently unavailable

Part no. A1645400182

Mercedes ML W164 GL X164 Fuse Box Cover Trim Panel Cap A1645400182

Product currently unavailable

Part no. A6395450301

Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450301

Product currently unavailable

Part no. A9069005103

Mercedes Sprinter W906 Radio CD Player Audio Bluetooth Head Unit A9069005103

Product currently unavailable

Part no. A2218700092

Mercedes W203 W221 Rain Light Sensor Control Module A2218700092

Product currently unavailable

Part no. A2711502733

Wiring Harness Mercedes W203 M271 Kompressor Petrol Engine Camshaft A2711502733

Product currently unavailable

Part no. A9075450100

Fuse Box Mercedes Sprinter W907 W910 Relay Box Fuse Box Module A9075450100

Product currently unavailable

Part no. A2115407907

Mercedes-Benz E-Class W211 Battery Positive Cable Wiring A2115407907

Product currently unavailable

Part no. A0009068206

Alternator Generator Mercedes W177 W247 M260 Petrol Engine 200A 14V A0009068206

Product currently unavailable

Part no. A9064408234

Mercedes W906 Positive Battery Cable Wiring Loom Harness A9064408234

Product currently unavailable

Part no. A0009052804

Radar Sensor Mercedes W176 W207 W246 Front Control Unit Module A0009052804

Product currently unavailable

Part no. A6397600604

Mercedes-Benz Vito W639 Front Left Door N/S Lock Bowden Pull Cable A6397600604

Product currently unavailable

Part no. A6519064800

Mercedes GLC X253 GLC 220d Diesel OM651 Engine Starter Motor Bosch A6519064800

Product currently unavailable

Part no. A2035402206

Mercedes W203 Diesel Engine Starter Alternator Electrical Cable A2035402206

Product currently unavailable

Part no. A6110920140

Mercedes-Benz M-Class ML W163 Fuel Pump Bracket Holder Housing A6110920140

Product currently unavailable

Part no. A1698207589

Mercedes W169 W245 CD Player Radio Audio Head Unit A1698207589

Product currently unavailable

Part no. A2018210047

Relay Mercedes W124 Indicators Wipers Hazard Lights Relay A2018210047

Product currently unavailable

Part no. A2035400050

Fuse Box Mercedes SLK R171 W203 W209 Front Relay Control Unit A2035400050

Product currently unavailable

Part no. A2038202686

Mercedes W203 W639 Audio 10 CD Player Audio Stereo Radio Head Unit A2038202686

Product currently unavailable

Part no. A6549009900

Glow Plug Relay Mercedes W177 Diesel OM654 Preglow Module A6549009900

Product currently unavailable

Part no. A1776204201

Mercedes C118 W177 W247 Battery Box Trim Housing Cover Support A1776204201

Product currently unavailable

Part no. A1569005303

Mercedes W176 Body Control Module BCM Control Unit ECU A1569005303

Product currently unavailable

Part no. A1679002718

Mercedes W205 W213 Door Module Front Left N/S Control Unit ECU A1679002718

Product currently unavailable

Part no. A0131546802

Alternator Generator Mercedes W204 W212 OM651 14V 180A Engine Electrical Unit

Product currently unavailable

Part no. A6402003370-1

Alternator Belt Tensioner Mercedes W169 W245 OM640 Diesel Holder Mounting Panel

Product currently unavailable

Part no. A2139068601

Mercedes W205 W213 Actuator Drive Exhaust Flap Control Unit A2139068601

Product currently unavailable

Part no. A2465403803

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465403803

Product currently unavailable

Part no. A0009061903

Mercedes W176 W242 W246 Alternator Generator Bosch M270 Petrol A0009061903

Product currently unavailable

Part no. A0009067900-1

Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A A0009067900

Product currently unavailable

Part no. A0025421219-1

Mercedes W168 W203 W211 W218 Relay Unit 5-Pin Yellow Hella A0025421219

Product currently unavailable

Part no. A0028201326

Mercedes SLK R171 Crash Sensor Air Bag Impact Module Control Unit A0028201326

Product currently unavailable

Part no. A0009828023

Fuse Relay Mercedes C117 W166 W176 W205 X253 Black 4 Pin 12V A0009828023

Product currently unavailable

Part no. A9065403527-1

Positive Cable Mercedes W906 OM651 Battery Starter Alternator Plus A9065403527

Product currently unavailable

Part no. A2229006014

Mercedes S205 C205 SAM Module Rear Body Comfort Control Unit ECU A2229006014

Product currently unavailable

Part no. A0051516601

Starter Motor Mercedes W203 W209 W211 W906 Engine Diesel A0051516601

Product currently unavailable

Part no. A9064402341

Positive Cable Mercedes W906 OM651 Battery Starter Alternator Plus A9064402341

Product currently unavailable

Part no. A0061517401

Starter Motor Mercedes Sprinter W906 OM651 Diesel Engine 0986021360

Product currently unavailable

Part no. A1648701589

Mercedes ML W164 Aerial Antenna Amplifier Module Unit A1648701589

Product currently unavailable

Part no. A2075401850

Fuse Box Mercedes W204 Battery Terminal Control Unit Module A2075401850

Product currently unavailable

Part no. A0025422619-1

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

Product currently unavailable

Part no. A1679052401

Crash Impact Sensor Mercedes C118 W177 W247 Front Acceleration Unit A1679052401

Product currently unavailable

Part no. A2711541402

Mercedes W203 W204 M271 Engine Alternator Generator Valeo 120A 14V A2711541402

Product currently unavailable

Part no. A9065460643

Mercedes Sprinter W906 Fuse Box Relay Bracket Monunt Holder A9065460643

Product currently unavailable

Part no. A2465407732

Battery Cable Mercedes W176 W246 Positive Wiring Starter Harness A2465407732

Product currently unavailable

Part no. A0001139065

Starter Motor Mercedes W204 W212 OM651 Diesel Engine Starter A0001139065

Product currently unavailable

Part no. A2139062201

Mercedes W213 Bonnet Hood Crash Actuator Unit Left Right N/O/S A2139062201

Product currently unavailable

Part no. A2048708826

Mercedes W204 W212 Front Windscreen Rain Light Sensor Control Unit A2048708826

Product currently unavailable

Part no. A1775406500

Mercedes W177 Electrical Wiring Harness Starter & 3-Phase Alternator A1775406500

Product currently unavailable

Part no. A0051512901

Mercedes ML W163 Engine Starter Motor A0051512901

Product currently unavailable

Part no. A0028202426

Mercedes W211 Xenon Headlight Level Control Module A0028202426

Product currently unavailable

Part no. A1694402805

Mercedes-Benz A B W169 W245 Starter Alternator Battery Lead Cable A1694402805

Product currently unavailable

Part no. A9079000806

Mercedes Sprinter W907 W910 Front SAM Body Control Module Unit ECU A9079000806

Product currently unavailable

Part no. A2205400031

Mercedes A B S Class W169 W220 W245 Battery Lead Cable Negative A2205400031

Product currently unavailable

Part no. A6429002700

Mercedes W203 W204 W212 OM642 Glow Plug Relay Unit Control Module A6429002700

Product currently unavailable

Part no. A1645403462

Mercedes W164 Gateway Control Unit Gateway Module ECU A1645403462

Product currently unavailable

Part no. A4479009005

Mercedes Vito W447 Head Unit Radio Navigation GPS Nav Display A4479009005

Product currently unavailable

Part no. N000000004039

Mercedes ML GLC W164 X164 W204 Additional Backup Battery 12V 1.2Ah N000000004039

Product currently unavailable

...

Showing 1486-1584 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