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. A0018276604

Mercedes W207 Connection Media Interface Cable AUX Wire A0018276604

Product currently unavailable

Part no. A0005429223

Mercedes-Benz C CLK W202 W208 Right O/S Parking System Warning Display Screen

Product currently unavailable

Part no. A2519005200

Mercedes R350 V251 Head Unit Radio Player Navigation Media Bluetooth A2519005200

Product currently unavailable

Part no. A2539005906

Mercedes C253 Body Control Module Temic A2539005906

Product currently unavailable

Part no. A6519000700-2

Mercedes W906 313 CDI OM651.955 129HP Diesel Engine ECU Kit A6519000700 Key Lock

Product currently unavailable

Mercedes W204 Radio Player Audio 20 Navi CD Player Head Unit A2049069701

-15%

Part no. A2049069701-1

Mercedes W204 Radio Player Audio 20 Navi CD Player Head Unit A2049069701

Product currently unavailable

Part no. A1775405710

Parking Sensor Wiring Mercedes W177 W247 Rear Bumper PDC Loom Cable A1775405710

Product currently unavailable

Part no. A1698207826

Airbag Module Mercedes W169 W245 Air Bag Sensor Control Unit ECU A1698207826

Product currently unavailable

Part no. A9079060100

Mercedes Sprinter W907 Battery Power Distributor Current Limiter A9079060100

Product currently unavailable

Part no. A2711504279

Mercedes W204 C180 156HP Kompressor M271.910 Engine ECU A2711504279 Manual

Product currently unavailable

Part no. A6461541102

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

Product currently unavailable

Part no. A2479001506

Mercedes C118 W177 W247 Body Control Module BCM V2 A2479001506

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. A6397602004

Bowden Cable Mercedes W639 Rear Right O/S Sliding Door Handle Catch A6397602004

Product currently unavailable

Part no. A2049000902-1

Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module A2049000902

Product currently unavailable

Part no. A0305454932

Mercedes-Benz E W210 Estate CDI Gearbox Control Module Unit ECU A0305454932

Product currently unavailable

Part no. A1669008808

Mercedes W212 Becker Navigation Map Pilot Control Unit Module A1669008808

Product currently unavailable

Part no. A6429002900-7

Mercedes W204 C350 CDI OM642.830 Engine Module ECU Kit A6429002900 Key + Lock

Product currently unavailable

Part no. A6421501500-2

Mercedes W639 3.0CDI OM642.990 Engine Control Unit ECU Kit A6421501500 Key Lock

Product currently unavailable

Part no. A0215455632

Mercedes Sprinter W901 OM602 Engine Control Unit ECU Module A0215455632 Manual

Product currently unavailable

Part no. A2098204189

Mercedes-Benz CLK-Class C209 W209 Aerial Antenna Amplifier Unit A2098204189

Product currently unavailable

Mercedes W221 SAM Relay Fuse Box Module Control Unit ECU A2215402250

-15%

Part no. A2215402250

Mercedes W221 SAM Relay Fuse Box Module Control Unit ECU A2215402250

Product currently unavailable

Part no. A2049005903-1

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049005903

Product currently unavailable

Part no. A1695420518-KMG

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

Product currently unavailable

Part no. A1729008412

Mercedes SLK R172 Roadster Folding Vario Roof Control Module A1729008412

Product currently unavailable

Part no. A6402002770

Alternator Belt Tensioner Mercedes W169 W245 OM640 Diesel Holder Mounting Panel

Product currently unavailable

Part no. A0009004436

Mercedes C118 C205 C253 Automatic Gearbox Control Unit Module ECU A0009008324

Product currently unavailable

Part no. A6079002300-2

Mercedes W176 180 CDI OM607.951 Blue Efficiency ECU Kit A6079002300 Key Lock

Product currently unavailable

Part no. A2035400050

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

Product currently unavailable

Part no. A0009056121

Mercedes W118 W177 W247 Front Radar Distance Control Unit Module A0009056121

Product currently unavailable

Part no. A2098205489-1

Mercedes W209 Radio Head Unit Media Player Navigation Screen A2098205489

Product currently unavailable

Part no. A2048702826

Mercedes S204 Module Control Unit Trunk Lid Rear Tailgate Lift A2048702826

Product currently unavailable

Part no. A2115406445

Mercedes C219 Gearbox Electronic Control Unit Module A2115406445

Product currently unavailable

Mercedes W447 W907 W910 Engine Control Unit Module ECU A6549009400

-40%

Part no. A6549009400

Mercedes W447 W907 W910 Engine Control Unit Module ECU A6549009400

Product currently unavailable

Part no. A1718204226

Mercedes R171 Convertible Roof Top Control Unit Module ECU A1718204226

Product currently unavailable

Part no. A2048700196

Radio Player Mercedes W204 COMAND Navi CD Head Unit A2048700196

Product currently unavailable

Part no. A2469067901-1

Battery Positive Mercedes C117 W176 W246 Plus Pole Terminal Lead A2469067901

Product currently unavailable

Part no. A2098203026

Mercedes CLK W209 Convertible Rain Light Sensor Windscreen Module A2098203026

Product currently unavailable

Part no. A2113231226

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

Product currently unavailable

Part no. A2139007939

Mercedes W167 W177 W247 Headlight Ballast Control Module Right O/S A2139007939

Product currently unavailable

Part no. A2115401805

Battery Cable Mercedes W211 OM647 Starter Alternator Wiring Harness A2115401805

Product currently unavailable

Part no. A1665408909

Mercedes ML W166 Diesel OM642 Engine Automatic Transmission Wiring Harness

Product currently unavailable

Part no. A2059005122

Seat Module Mercedes W205 W253 Memory Control Unit Driver's Side A2059005122

Product currently unavailable

Part no. A1569056800

Mercedes-Benz X156 Front Bumper Pressure Crash Impact Sensor A1569056800

Product currently unavailable

Part no. A2139052403

Mercedes W213 Trunk Tailgate Rear Switch Sensor Module A2229059004

Product currently unavailable

Part no. A1728201700

Mercedes W176 W246 USB Interface Multimedia Adapter Connector A1728201700

Product currently unavailable

Part no. A9065454701

Mercedes W906 Fuse Box Relay Control Unit Electric Module A9065454701

Product currently unavailable

Part no. A6397600504-1

Mercedes Vito W639 1 Rear Left Right Sliding Door Handle Bowden Cable

Product currently unavailable

Door Module Mercedes W176 W246 Front Left N/S Control Unit VST A1669005605

-5%

Part no. A1669005605

Door Module Mercedes W176 W246 Front Left N/S Control Unit VST A1669005605

Product currently unavailable

Part no. A2139008828

Air Module Mercedes W213 C238 C253 Control Unit ECU A2139008828

Product currently unavailable

Part no. A2048708826

Mercedes W204 W212 Front Windscreen Rain Light Sensor Control Unit A2048708826

Product currently unavailable

Part no. A2123300135

Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

Product currently unavailable

Part no. A0009004710

PDC Module Mercedes W205 X253 Parking Sesnor Assist Control Module A0009004710

Product currently unavailable

Part no. A2139007929

Mercedes W213 GLC X253 Hybrid High Voltage Battery Inverter Module A2139007929

Product currently unavailable

Part no. A1694403805

Mercedes-Benz A B W169 W245 Starter Alternator Wiring Loom Harness A1694403805

Product currently unavailable

Part no. A2048200089

Mercedes-Benz C E Class W204 W207 Aerial Antenna Amplifier Unit A2048200089

Product currently unavailable

Part no. A9064460742

Mercedes Sprinter W906 Air SRS Bag Control Module Unit 0285010033 A9064460742

Product currently unavailable

Part no. A2123200558

Mercedes W212 Valve Block AMG Air Suspension Control Unit Module A2123200558

Product currently unavailable

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

-40%

Part no. A2115458601-1

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

Product currently unavailable

Part no. A6461500678-1

Mercedes Vito W639 109CDI 646.980 95HP Engine ECU Kit A6461500678 Ignition + Key

Product currently unavailable

Part no. A9066200131

Mercedes-Benz Sprinter W906 Battery Tray Housing Box Case A9066200131

Product currently unavailable

Part no. A0015422623-1

Mercedes Vito W639 Parking Sensor Warning Device Display A0015422623

Product currently unavailable

Part no. A0009060086

Mercedes W205 Control Unit Power Distribution Box Electrical A0009060086

Product currently unavailable

Part no. A0009002013

Mercedes W213 C238 Tyre Pressure Monitor Sensor Module Unit TPMS ECU A0009002013

Product currently unavailable

Part no. A2115459232

Parktronic Module Mercedes W211 PDC Parking Sensors Control Unit A2115459232

Product currently unavailable

Part no. A2095452001

Mercedes CLK C209 Fuse Box Relay SAM Module Control Unit A2095452001

Product currently unavailable

Part no. A0009067902

Mercedes W204 S204 C204 Alternator Generator 150A 14V 1.8 Petrol A0009067902

Product currently unavailable

Part no. A2535406430

Mercedes X253 Front Bumper PDC Wiring Parking Sensor Loom Harness A2535406430

Product currently unavailable

Part no. A2195450732

Mercedes CLS W219 Parking Sensor PDC Distance Control Unit Module A2195450732

Product currently unavailable

Part no. A1729004004-1

Mercedes W204 Display Screen Multifunction Navigation Dashboard A1729004004

Product currently unavailable

Part no. A2129003825

Mercedes W204 SAM Module Control Unit Electrical Fuse Box Unit A2129003825

Product currently unavailable

Part no. A0009015810

Gearbox Control Mercedes W177 W247 Transmission Unit Module ECU A0009015810

Product currently unavailable

Part no. A2229063202

Fuse Box Mercedes W205 W222 Electrical Relay Box Module Unit A2229063202

Product currently unavailable

Part no. A1679002718

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

Product currently unavailable

Part no. A2129006709

Head Unit Mercedes C207 W212 High Line Radio Sat Nav DVD Bluetooth A2129006709

Product currently unavailable

Part no. A6519005301-14

Mercedes S212 E220CDI OM651.924 170HP Engine Control Unit ECU Kit A6519005301

Product currently unavailable

Part no. A1698700289

Mercedes-Benz A-Class W169 CD Player Radio Stereo Head Unit A1698700289

Product currently unavailable

Part no. A6461500477

Mercedes W906 311 CDI 646.985 109HP Engine Unit Module ECU A6461500477 Manual

Product currently unavailable

Part no. A1669003708

Mercedes W166 Hatch Tailgate Central Module Locking Control ECU A1669003708

Product currently unavailable

Part no. A6519060000

Starter Motor Mercedes W639 W906 OM651 Engine Diesel Bosch A6519060000

Product currently unavailable

Part no. A9065402727

Mercedes Sprinter W906 OM651 Engine Wiring Harness Cable Loom A9065402727

Product currently unavailable

Part no. A2829061900

Mercedes W177 M282 Petrol Engine Starter Motor A2829061900

Product currently unavailable

Part no. A1729006609

Mercedes SLK R172 Radio CD Player Sat Nav Comand Head Unit A1729006609

Product currently unavailable

Part no. A1648705094

Mercedes ML W164 Audio Stereo Radio CD Player Head Unit A1648705094

Product currently unavailable

Part no. A6111537779-1

Mercedes W203 C220CDI OM611.692 116HP Engine Unit ECU Kit A6111537779 Key Lock

Product currently unavailable

Part no. A2075401850

Fuse Box Mercedes W204 Battery Terminal Control Unit Module A2075401850

Product currently unavailable

Part no. A2129009025

Mercedes W212 Fuse Box Front Relay Control Unit Module SAM A2129009025

Product currently unavailable

Part no. A2118701826

Seat Module Mercedes W203 W211 Control Unit Front Left Right N/O/S A2118701826

Product currently unavailable

Part no. A2711540902

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

Product currently unavailable

Part no. A6519003203-4

Mercedes W906 313 CDI OM651.955 129HP Diesel Engine ECU A6519003203 Manual

Product currently unavailable

Part no. A0061513701

Mercedes W164 W204 W211 C216 C219 M273 Starter Motor Assembly A0061513701

Product currently unavailable

Part no. A0002704652

Mercedes W907 DSM ISM Gearbox Control Unit Module Cloning Coding A0002704652

Product currently unavailable

Part no. A2098205926

Mercedes CLK C209 Body Control Module Unit A2098205926

Product currently unavailable

Part no. A0009828323-1

Mercedes W176 W246 Power Relay Control Module 5 Pin 12V A0009828323 Set X2

Product currently unavailable

Part no. A2049001202

Mercedes W204 S204 Estate Rear SAM Control Unit Module A2049001202

Product currently unavailable

Part no. A0061516001

Mercedes R171 W204 W212 Starter Motor Bosch M272 Engine Petrol A0061516001

Product currently unavailable

Part no. A1698202675-2

Mercedes W169 W245 Aerial Roof Antenna Radio Rod A1698202675

Product currently unavailable

Part no. A4475460064

Mercedes W447 Fuse Box Module Cover Trim Trunk A4475460064

Product currently unavailable

Part no. A6461507272-1

Mercedes W639 109CDI 646.980 Engine ECU Kit Ignition + Key + Lock A6461507272

Product currently unavailable

...

Showing 2179-2277 of 3267 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