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. A2229009519

Mercedes C238 Head Unit Radio CD Player Audio Sat Nav Control A2229009519

Product currently unavailable

Battery Junction Block Mercedes W176 W246 Battery Plus Pole Terminal A2469068601

-15%

Part no. A2469068601

Battery Junction Block Mercedes W176 W246 Battery Plus Pole Terminal A2469068601

Product currently unavailable

Part no. A0009008129-1

PDC Module Mercedes W177 Parktronic Parking Assist Control Module A0009008129

Product currently unavailable

Part no. A6511400800-1

Mercedes Sprinter W910 ECU Bracket Control Unit Module Holder Mount A6511400300

Product currently unavailable

Part no. A0035423918

Yaw Sensor Mercedes W203 W209 ESP Rotation Rate Control Unit Module A0035423918

Product currently unavailable

Part no. A1645404601

Mercedes ML W164 Control Unit Module Fuse Box SAM A1645404601

Product currently unavailable

Part no. A1695455332

Mercedes W169 PDC Parking Sensor Distance Control Module Unit ECU A1695455332

Product currently unavailable

Part no. A2469003818

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469003818

Product currently unavailable

Part no. A1635422318

Mercedes ML W163 Yaw Rate Sensor Turn Rate Speed Module A1635422318

Product currently unavailable

Part no. A1695407705

Mercedes-Benz A B W169 W245 Door Cable Harness Wiring Loom Front Left N/S

Product currently unavailable

Mercedes Sprinter W906 OM651 OM642 Diesel Adblue Control Unit ECU A0009002914

-40%

Part no. A0009002914

Mercedes Sprinter W906 OM651 OM642 Diesel Adblue Control Unit ECU A0009002914

Product currently unavailable

Part no. A1649002901

Mercedes ML W164 Gateway Control Unit Gateway Module ECU A1645406745

Product currently unavailable

Part no. A2059007815

Mercedes W205 Radio Audio Navi GPS Head Unit A2059007815

Product currently unavailable

Part no. A2139003326

SAM Module Mercedes W213 C238 Rear Trunk Control Unit ECU A2139003326

Product currently unavailable

Part no. A0061516101

Mercedes ML W164 Diesel Engine Starter Motor A0061516101

Product currently unavailable

Part no. A2139006633

Mercedes X253 Central Control Unit Electronic Module A2139006633

Product currently unavailable

Part no. A2208201475

Mercedes-Benz S-Class W220 Aerial Roof Antenna Shark Radio A2208201475

Product currently unavailable

Part no. A2711500620

Engine Wiring Mercedes W204 C207 W212 M271 Harness Loom Cable A2711500620

Product currently unavailable

Part no. A1669062300

Mercedes W221 Rear Armrest DVD Player Control Headunit A1669062300

Product currently unavailable

Part no. A0028203226

Air Module Mercedes W210 SRS Control Unit ECU Control Module A0028203226

Product currently unavailable

Part no. A2229000821

Mercedes C238 Headlight Ballast Control Unit Module A2229000821

Product currently unavailable

Part no. A0055421818

Mercedes W204 Yaw Rotation Rate Acceleration Sensor Module A0055421818

Product currently unavailable

Part no. A1694402805

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

Product currently unavailable

Part no. A6399000300-1

Mercedes Vito Viano W639 Side Sliding Door Control Unit Module ECU A6399000300

Product currently unavailable

Part no. A1121535479

Mercedes W203 C240 M112.912 170HP Engine Control Module Unit ECU A1121535479

Product currently unavailable

Part no. A1665460143

Mercedes ML W166 Fuse Box Electric Distribution Control Module A1665460143

Product currently unavailable

Part no. A6089060100

Starter Mercedes W177 W247 C118 1.5 OM608 Diesel Starter Motor A6089060100

Product currently unavailable

Part no. A2098205489

Mercedes W209 Radio Head Unit Media Player Navigation Screen A2098205489

Product currently unavailable

Part no. A2469069600-1

Battery Cable Mercedes W176 W246 Negative Harness Lead Terminal A2469069600

Product currently unavailable

Part no. A6110920140

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

Product currently unavailable

Distributor Box Mercedes W204 W207 W221 Connector Block Control Unit A0045467640

-5%

Part no. A0045467640

Distributor Box Mercedes W204 W207 W221 Connector Block Control Unit A0045467640

Product currently unavailable

Part no. A2035454701

Mercedes-Benz C CLC Class CL203 S203 W203 Fuse Box Module SAM Unit A2035454701

Product currently unavailable

Part no. A1718200726-1

Mercedes R171 Front Module Door Left N/S Control Unit A1718200726

Product currently unavailable

Part no. A1769009203

Mercedes R172 R231 Headlight LED Ballast Control Unit Module A1769009203

Product currently unavailable

Part no. A1635402209

Mercedes-Benz M ML W163 Rear Bumper Parktronic Wiring Loom Harness A1635402209

Product currently unavailable

Part no. A2129068800

Radio Head Unit Mercedes W212 COMAND Navi CD DVD Player Control Unit A2129068800

Product currently unavailable

Part no. A0305452632

Mercedes ML W163 270 CDI Automatic Transmission Control Module A0305452632

Product currently unavailable

Part no. A0355454232

Mercedes W211 Automatic Gearbox Transmission Module Control Unit ECU A0355454232

Product currently unavailable

Part no. A2059000628

Door Module Mercedes W205 Front Right O/S Door Control Module Unit A2059000628

Product currently unavailable

Part no. A2078210411

Mercedes W204 W207 Centre Console Connector AUX USB Port Socket Trim A2078210411

Product currently unavailable

Part no. A2098202526

Mercedes CLK C209 Keyless Go Module ECU Entry Door Control Unit A2098202526

Product currently unavailable

Part no. A1635457032

Mercedes ML W163 Module SAM Electronics Control Unit A1635457032

Product currently unavailable

Part no. A9068201589

Mercedes Sprinter W906 Radio Stereo Audio Head Unit A9068201589

Product currently unavailable

Part no. A1668600602

Mercedes W166 Head Roof Curtain Right O/S Side Air Module A1668600602

Product currently unavailable

Part no. A9065403815

Mercedes Sprinter W906 OM651 Battery Wiring Harness Loom Cable A9065403815

Product currently unavailable

Part no. A0009004434-1

Parking Control Module Mercedes C118 W177 W247 PDC Bluetooth Unit A0009004434

Product currently unavailable

Part no. A0009003213

Adblue Module Mercedes W166 W212 R172 C218 C292 Control Unit ECU A0009003213

Product currently unavailable

Part no. A6519002803

Mercedes W251 R320 CDI OM642 4Matic Engine Unit ECU KIT A6519002803 Key Lock

Product currently unavailable

Part no. A0015404517

Mercedes-Benz C E Class W202 W210 ESP Yaw Rotation Rate Sensor A0015404517

Product currently unavailable

Part no. A2049009701

Mercedes W204 Front Fuse Box Relay Control Unit SAM Module A2049009701

Product currently unavailable

Part no. A1644406532

Mercedes ML W164 Diesel OM629 Wiring Alternator Starter Harness A1644406532

Product currently unavailable

Part no. A2049004306

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049004306

Product currently unavailable

Part no. A1648220230

Mercedes W164 W212 Alarm Sensor Warning Buzzer Module Unit A1648220230

Product currently unavailable

Part no. A2059001814

Mercedes W205 Air System Control Unit Module ECU A2059001814

Product currently unavailable

Part no. A4479001000

Mercedes Vito W447 Air Module Sensor Control Unit ECU A4479001000

Product currently unavailable

Part no. A2095451701-1

Mercedes A209 Fuse Box SAM Control Module Relay Box A2095451701

Product currently unavailable

Parking Module Mercedes W221 W216 Sensor PDC Distance Control Unit A2219000804

-5%

Part no. A2219000804

Parking Module Mercedes W221 W216 Sensor PDC Distance Control Unit A2219000804

Product currently unavailable

Part no. A2115459301

Mercedes W211 W219 Fuse Box Rear SAM Module Electrical Fuse Unit A2115459301

Product currently unavailable

Part no. A6461541102-3

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

Product currently unavailable

Part no. A2028207426

Mercedes W202 W208 Anti Theft Alarm Module Control Unit ECU A2028207426

Product currently unavailable

Part no. lhd-A2218206389

Mercedes C216 W221 Display Screen Multifunction Navi Command A2218206389

Product currently unavailable

Part no. A6121533279-1

Mercedes-Benz ML W163 270 CDI Engine Control ECU Kit A6121533279 Key Automatic

Product currently unavailable

Part no. A0993200258

Mercedes W213 C238 Air Suspension Valve Block Control Unit Module A0993200258

Product currently unavailable

Part no. A2118705694

Mercedes W211 Radio Head Unit CD Audio Player Control Unit A2118705694

Product currently unavailable

Part no. A2465402605

Mercedes-Benz A B W176 W246 Engine Temperature Sensor Wiring Cable Harness

Product currently unavailable

Part no. A9065403527-1

Positive Cable Mercedes W906 OM651 Battery Starter Alternator Plus A9065403527

Product currently unavailable

Part no. A2539005009

Display Screen Mercedes C253 Vito W447 W448 Head Unit Touch Monitor A2539005009

Product currently unavailable

Part no. A2135402045

Mercedes W213 Center Console Cupholder Lamp Wiring Harness A2135402045

Product currently unavailable

Part no. A0009822223

Mercedes W906 SAM Module Fuse Box Relay Control Unit Regulator A0009822223

Product currently unavailable

Part no. A2048700594

Radio Player Mercedes-Benz W204 COMAND Navi CD Head Unit A2048700594

Product currently unavailable

Part no. A2105401930

Mercedes-Benz E-Class W210 Battery Positive Plus Cable Loom Harness A2105401930

Product currently unavailable

Part no. A1698203775

Mercedes W169 W245 Aerial Roof Antenna Radio Control Unit Module A1698203775

Product currently unavailable

Part no. A0009067702-1

Mercedes W204 W207 W212 Alternator Generator Engine Diesel 180A 14V A0009067702

Product currently unavailable

Part no. A2055455440

Mercedes C205 Keyless Go Module Unit Bracket Mount Holder Support A2055455440

Product currently unavailable

Part no. A2721540002

Alternator Generator Mercedes R171 W209 M272 Petrol Engine 150A A2721540002

Product currently unavailable

Part no. A2038201585-1

Mercedes W203 Door Module Control Unit Front Left N/S A2038201585

Product currently unavailable

Part no. A0215452032

Mercedes C140 CL420 119.981 279HP Engine Unit ECU A0215452032 Automatic Gearbox

Product currently unavailable

Part no. A2098205226

Mercedes CLK C209 Rear Body Control Module Unit BCM ECU A2098205226

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. A2229008911-1

Tuner Box Mercedes W213 W205 W222 Digital Audio Control Unit DAB ECE A2229008911

Product currently unavailable

Mercedes W204 Fuse Box Relay SAM Control Unit Module A2129005912

-15%

Part no. A2129005912

Mercedes W204 Fuse Box Relay SAM Control Unit Module A2129005912

Product currently unavailable

Part no. A1665405202

Mercedes ML W166 GLE C292 Engine Compartment Fuse Box Right A1665405202

Product currently unavailable

Part no. A2469007018

Mercedes W176 W246 Display Screen Radio Navigation Sat Nav Unit A2469007018

Product currently unavailable

Part no. A2219013000

Mercedes W221 Fuse Box Control Unit SAM Module Relay A2219013000

Product currently unavailable

Part no. A2118703889

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

Product currently unavailable

Part no. A2219006902

Mercedes Class W221 Rear Fuse Box Control Unit Module SAM A2219006902

Product currently unavailable

Part no. A0091547602

Mercedes R170 Alternator Generator M111 Petrol Engine 90A A0091547602

Product currently unavailable

Part no. A2208274642-1

CD Changer Mercedes W203 W209 W220 6 Disc Player With Magazine A2208274642

Product currently unavailable

Part no. A2218702826

Mercedes W203 W209 W221 Windscreen Rain Sensor Control Module A2218702826

Product currently unavailable

Part no. A0141541502

Alternator Generator Mercedes W204 W212 M271 Engine Lucas 150A 14V LRA03506

Product currently unavailable

Part no. A6421501500

Mercedes W639 3.0CDI OM642.990 Engine Control Unit ECU A6421501500 Automatic

Product currently unavailable

Part no. A2059008618

Safety Module Mercedes W205 Airbag SRS Control Module Unit A2059008618

Product currently unavailable

Mercedes W176 W242 W246 Alternator Generator Bosch M270 Petrol A0009061903

-40%

Part no. A0009061903

Mercedes W176 W242 W246 Alternator Generator Bosch M270 Petrol A0009061903

Product currently unavailable

Part no. A2711532291

Mercedes W203 C180 Kompressor M271.946 Engine ECU A2711532291 Automatic

Product currently unavailable

Part no. A2035450701

Mercedes W203 Fuse Box Rear SAM Module Relay Control Unit A2035450701

Product currently unavailable

Part no. A1645401730

Mercedes W164 Battery Starter Alternator Wiring Harness Cable OM642 A1645401730

Product currently unavailable

Part no. A2709002100-3

Mercedes X117 CLA 250 270.920 4-Matic Engine Control Unit Module A2709002100

Product currently unavailable

Part no. A2198202326

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

Product currently unavailable

Part no. A2059004236

Mercedes W205 Harman Radio Stereo CD Player Audio Sat Head Unit A2059004236

Product currently unavailable

...

Showing 2971-3069 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