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. A0065427018

Yaw Module Mercedes W221 ML W164 Rotation Rate Acceleration Sensor A0045423818

Product currently unavailable

Part no. A2215400850

Mercedes W221 Fuse Box Relay Control Unit Module A2215400850

Product currently unavailable

Part no. A9015400150

Fuse Box Mercedes Sprinter W901 W902 W903 W904 Relay Control Unit A9015400150

Product currently unavailable

Part no. A2059006222

Mercedes W205 Head Radio CD Player Navi Interface Control Unit A2059006222

Product currently unavailable

Part no. A2118703889

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

Product currently unavailable

Part no. A2189061903

SD Card Mercedes W156 W176 W205 Garmin Map Pilot Navigation Europe A2189061903

Product currently unavailable

Part no. A2059008430

Head Unit Mercedes C205 Radio Player USB Sat Nav Harman A2059008430

Product currently unavailable

Part no. 284B68764R

Mercedes W415 Fuse Box Relay Control Unit Module 284B68764R

Product currently unavailable

Part no. A2049007806

Mercedes W204 Sound Audio Amplifier Unit Harman Becker A2049007806

Product currently unavailable

Part no. A9069003903

Mercedes Sprinter W906 Central Lock Locking Control Unit Module A9069003903

Product currently unavailable

Part no. A9079060100

Mercedes Sprinter W907 Battery Power Distributor Current Limiter A9079060100

Product currently unavailable

Part no. A6397600704

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

Product currently unavailable

Part no. A2711502433

Engine Wiring Harness Mercedes W203 W211 M271 Loom Wiring Cable A2711502433

Product currently unavailable

Part no. A0035423918

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

Product currently unavailable

Part no. A2118275542

Mercedes W169 W211 6 Disc CD Changer Player Glove Box A2118275542

Product currently unavailable

Part no. A1718200386-1

Mercedes SLK R171 Stereo Radio CD Player Head Unit A1718200386

Product currently unavailable

Part no. A1718203389

Head Unit Mercedes R171 Radio Player Sat Nav Comand DVD APS A1718203389

Product currently unavailable

Part no. rhd-A2055407011

Mercedes W205 Front Relay Power Fuse Box Control Unit Module A2055407011

Product currently unavailable

Part no. A6549001400-2

Mercedes W213 E220 CDI OM654 194HP Engine ECU Kit A6549001400 Key Lock Automatic

Product currently unavailable

Part no. A6429009900

Adblue Module Mercedes W164 W212 W221 Control Unit ECU A6429009900

Product currently unavailable

Part no. A1645402372

Mercedes W164 W251 Fuse Relay Module Rear Fuse Box Unit A1645402372

Product currently unavailable

Part no. A2095451401

Fuse Box Mercedes CLK W203 W209 Front SAM Module Control Unit A2095451401

Product currently unavailable

Part no. A6399005400-1

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

Product currently unavailable

Part no. GPBZ1901-5X

Mercedes W205 MMI Multimedia CarPlay Android Retrofit Interface Kit GPBZ1901-5X

Product currently unavailable

Part no. A2039000000-1

Mercedes CL203 Head Unit CD Player Radio Audio Controller Unit A2039000000

Product currently unavailable

Part no. A2038201311

Phone Adapter Mercedes W203 W211 Contact Plate Holder Telephone A2038201311

Product currently unavailable

Part no. A1775402729

Parktronic Wiring Mercedes W177 Front Bumper Parking Assist Harness A1775402729

Product currently unavailable

Part no. A6421508900-3

Mercedes W221 S350 BlueTEC OM642.862 Engine ECU Kit A6421508900 Key Ignition

Product currently unavailable

Part no. A2098204526

Mercedes CLK W209 Convertible Roof Top Control Unit Module ECU A2098204526

Product currently unavailable

Part no. A2469004716-1

Radio CD Player Mercedes W176 W246 Audio Navigation Stereo Head Unit A2469004716

Product currently unavailable

Part no. A2215407962

Mercedes CL C216 W221 S500 Air Pneumatic Suspension Control Module A2215407962

Product currently unavailable

Part no. A2469069600-1

Battery Cable Mercedes W176 W246 Negative Harness Lead Terminal A2469069600

Product currently unavailable

Part no. A2129006924

Mercedes W207 W212 SAM Module Fuse Box Relay Control Unit A2129006924

Product currently unavailable

Part no. A2215400901

Parktronic Module Mercedes W221 Parking Aid Sensors Control Unit A2215400901

Product currently unavailable

Part no. A9069000104

Mercedes Sprinter W906 Radio Stereo Sat Nav Display Screen Head Unit A9069000104

Product currently unavailable

Part no. A2129009605

Fuse Box Mercedes W204 W212 Diesel Front Sam Control Module Unit A2129009605

Product currently unavailable

Part no. A6461506478-1

Mercedes W906 OM646.984 88HP Engine Control Unit Module ECU Kit A6461506478 Keys

Product currently unavailable

Part no. A2118205785

Mercedes W211 S211 Airbag System Control Unit Module ECU

Product currently unavailable

Part no. A2049060205-4

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

Product currently unavailable

Part no. A2465840971

Mercedes W176 Fuse Box Allocation Fuse Placement Map Card Diagram A2465840971

Product currently unavailable

Part no. A6519009102-1

Mercedes W212 E300 Hybrid 651.924 204HP Engine ECU Kit A6519009102 Keys Lock

Product currently unavailable

Part no. A2469000012-1

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

Product currently unavailable

Part no. A6409004900

Mercedes W169 A180 CDI OM640.940 109HP Engine Control Unit ECU A6409004900

Product currently unavailable

Part no. A9069006002

Mercedes W906 Rear Bumper Blind Spot Radar Sensor Left Right Module A9069006002

Product currently unavailable

Part no. A6079002300-3

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

Product currently unavailable

Part no. A6395450601

Mercedes Vito W639 SAM Module Electric Control Unit A6395450601

Product currently unavailable

Part no. A1665420318

Battery Cable Mercedes W169 W211 Negative Lead Wiring Pole Harness A1665420318

Product currently unavailable

Part no. A1669009808

Mercedes ML W166 Head Unit Radio Player Sat Nav Tel SD Card Unit A1669009808

Product currently unavailable

Part no. A6079000700-1

Mercedes W176 A180 CDI OM607.951 BlueEFFI Engine ECU Kit Lock + Key A6079000700

Product currently unavailable

Part no. A6519003403-2

Mercedes W906 314CDI OM651.955 143HP Engine Unit Module ECU Kit A6519003403

Product currently unavailable

Part no. A2710107344-1

Mercedes A209 CLK200 K M271.955 Engine Control Unit ECU Kit A2710107344 Key

Product currently unavailable

Part no. A2115403845

Mercedes W211 Battery Module Trunk Relay Control Module Unit A2115403845

Product currently unavailable

Part no. A2035453801-1

Mercedes W203 W209 Fuse Box Rear SAM Module Relay Control Unit A2035453801

Product currently unavailable

Part no. A2215403050

Mercedes W221 Rear SAM Fuse Box Power Distribution Control Unit A2215403050

Product currently unavailable

Part no. A1648209585

Mercedes ML W164 Air Module System Control Unit A1648209585

Product currently unavailable

Part no. A0009002008

Mercedes W205 Body Control Module Control Unit BCM ECU Module A0009002008

Product currently unavailable

Part no. 281156606R

Mercedes Citan W415 Renault Kangoo Master Radio CD Player Head Unit 281156606R

Product currently unavailable

Part no. RHD-A1778685200

Mercedes CLA C118 W177 W247 M260 Inerting System Gas Generator A1778685200

Product currently unavailable

Part no. A2661531491-4

Mercedes W169 A160 266.920 95HP Engine Control Unit ECU Kit A2661531491 Key Lock

Product currently unavailable

Part no. A2469008313-1

Radio Media Headunit Mercedes C117 W176 Sat Navigation Control Panel A2469008313

Product currently unavailable

Part no. A6519007500-8

Mercedes W204 C220CDI BlueEFFICIENCY OM651.911 Engine ECU Kit A6519007500 Key

Product currently unavailable

Part no. A1718207326

Mercedes R171 Air Module SRS Control Unit Crash Sensor ECU A1718207326

Product currently unavailable

Part no. A1635400841

Mercedes W163 Battery Ground Earth Strap Cable Wiring A1635400841

Product currently unavailable

Part no. 6953547

MIni Cooper R50 R52 R53 Display Screen Multimedia Navigation Sat Nav 6953547

Product currently unavailable

Part no. A2055402224

Mercedes S205 X253 Center Console Wiring Loom Electrical Harness A2055402224

Product currently unavailable

Part no. A2469003615

Mercedes GLA X156 Tailgate Lift Boot Lid Control Unit Module A2469003615

Product currently unavailable

Part no. A0225452426

Mercedes W176 Bumper PDC Wiring Parking Sensor Loom Harness Plug A0225452426

Product currently unavailable

Part no. A2038204585

Airbag Module Mercedes W203 W209 SRS Control Unit Crash Sensor ECU A2038204585

Product currently unavailable

Part no. A1665420518

Battery Wiring Mercedes ML W166 Battery Negative Terminal Cable Wire A1665420518

Product currently unavailable

Part no. A0015454516

Mercedes CLC CL203 Automatic Gearbox Control Unit Module ECU A0015454516

Product currently unavailable

Part no. A2389053301

Tailgate Trunk Mercedes X117 X156 W205 Boot Rear Control Module Unit A2389053301

Product currently unavailable

Part no. A2139003617-1

Telematics Module Mercedes W176 W205 W207 Bluetooth Control Unit A2139003617

Product currently unavailable

Part no. A9060034099

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

Product currently unavailable

Part no. A2539006905

Mercedes GLC X253 Central Display Dashboard Infotainment Screen A2539006905

Product currently unavailable

Part no. A2469002617

Mercedes W117 W242 W246 Head Unit Audio Player Radio Sat Nav Module A2469002617

Product currently unavailable

Part no. A1698705794

Radio Player Mercedes W169 Audio 20 Stereo CD Head Unit Display A1698705794

Product currently unavailable

Part no. A2118706789

Audio Amplifier Mercedes W211 C219 Harman Kardon Sound Module Unit A2118706789

Product currently unavailable

Part no. rhd-A6511503586

Mercedes W212 OM651 Diesel Engine Wiring Harness Loom Cable A6511503586

Product currently unavailable

Part no. A1718201726

Mercedes SLK R171 Seat Heated Heating Control Unit Module ECU A1718201726

Product currently unavailable

Part no. A2098202626

Mercedes CLK C209 Keyless Go Module ECU Door Lock Control Unit A2098202626

Product currently unavailable

Part no. A2139062607

Mercedes W213 SD Card Garmin Map Pilot Navi Europe 2019 A2139062607

Product currently unavailable

Part no. A0009001900

Mercedes W639 Automatic Gearbox EGS Control Unit Transmission Module A0009001900

Product currently unavailable

Part no. A2218209289

Mercedes-Benz S W221 Aerial Antenna Control Unit DAB TV Keyless-GO A2218209289

Product currently unavailable

Part no. A6429002900-1

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

Product currently unavailable

Part no. A1679001414

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

Product currently unavailable

Part no. A9079007404

Mercedes Sprinter W907 W910 Body Control Module ECU A9079007404

Product currently unavailable

Part no. A0009827008-1

Mercedes W204 W212 W222 Auxiliary Additional Generator Battery A0009827008

Product currently unavailable

Part no. A6079001800

Mercedes W176 A180 CDI OM607.951 109HP Engine ECU A6079001800 Automatic

Product currently unavailable

Part no. A1698208089

Mercedes W168 W203 W209 Audio Sound System Amplifier Unit A1698208089

Product currently unavailable

Part no. rhd-A2125405808

Screen Cable Mercedes W212 Wire Connector Monitor Display A2125405808

Product currently unavailable

Part no. A2711504279

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

Product currently unavailable

Part no. A2129006426

Head Unit Mercedes W212 High Line Radio Sat Nav DVD Bluetooth A2129006426

Product currently unavailable

Part no. A2129006709

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

Product currently unavailable

Part no. A2129004518

Door Control Unit Mercedes W204 W207 W212 Front Left N/S Module ECU A2129004518

Product currently unavailable

Part no. A0009007006

Adblue Module Mercedes W207 W212 Control Unit ECU A0009007006

Product currently unavailable

Part no. A1561502379-1

Mercedes ML63 W164 AMG 4Matic M156.980 510HP Engine ECU A1561502379 Automatic

Product currently unavailable

Part no. A0005455716

Mercedes W204 C220 CDI Automatic Transmission Control Module TCU A0005455716

Product currently unavailable

Part no. A1698705894-1

Mercedes-Benz A B Class W169 W245 CD Player Radio Stereo Head Unit A1698705894

Product currently unavailable

Part no. A1645406501

Mercedes ML W164 Front SAM Control Unit Module ECU A1645406501

Product currently unavailable

...

Showing 3070-3168 of 5405 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