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. 7803373-6

BMW E60 E87 E90 120d 320d 520d M47N2 Engine Control ECU Kit DDE 7803373 CAS3

Product currently unavailable

Part no. rhd-9292244

BMW 1 2 Series F20 F21 F22 F23 Central Information Display Screen 6,5" 9292244

Product currently unavailable

Part no. 6982397

BMW E81 E87 E90 E91 E92 Parking Control Module Unit PDC 6982397

Product currently unavailable

Part no. 8574352-3

BMW X1 E84 20d 20dX Diesel N47N Engine Control Unit ECU Kit DDE 8574352 CAS3 Key

Product currently unavailable

Part no. A0365457032

Mercedes C209 W211 CLS C219 Steering Wheel Module Control Unit A0365457032

Product currently unavailable

Part no. 355013 ampassy 5631b6

Audi A4 B7 Audio Sound System Amplifier Bose 355013 5631B6

Product currently unavailable

Part no. DEH-3400UB

Radio Player Pionieer DEH-3400UB CD USB ipod mp3 Player Unit 50W x4

Product currently unavailable

Part no. 0AH911023G

Audi Seat Skoda Volkswagen 1.2 TSI Petrol Starter Motor 0AH911023G

Product currently unavailable

Part no. A2115457201

Sam Control Module Mercedes W211 C219 Fuse Box Front Unit Relay A2115457201

Product currently unavailable

Part no. 2284105

Parking Brake Module BMW F10 M5 F12 F13 M6 Control Unit Lock Module 2284105

Product currently unavailable

Part no. RHD-8T2035652G-1

Audi A5 8T A4 B8 Sat Navi Stereo Radio Audio MMI Head Unit CD Player 8T2035652G

Product currently unavailable

Part no. 7580279-5

BMW E81 E87 LCI E90 120i 320i N43 170HP ECU Kit DME 7580279 CAS3 Key Automatic

Product currently unavailable

Part no. 7552176-6

BMW E87 E90 120i 320i N46 ECU Engine Control Kit DME 7552176 CAS2 Key Manual

Product currently unavailable

Part no. 3455539-3

Mini Cooper R55 R56 Radio Boost CD Audio Player Head Unit 3455539

Product currently unavailable

Part no. 6932812

BMW X3 E83 Radio Navigation System CID Control Unit CD Player 6932812

Product currently unavailable

Part no. CC1112A650AB-1

Ford Transit MK7 2.2 TDCI 100HP Engine Control ECU Kit CC11-12A650-AB Manual

Product currently unavailable

Part no. A6461500477

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

Product currently unavailable

Part no. 03D903025J-1

Seat Ibiza Volkswagen Polo Mk5 6R 1.2 Petrol Alternator Generator 03D903025J

Product currently unavailable

Part no. TUNGSTONE Titanium Plus 77Ah Accumulator

TUNGSTONE Titanium Plus Accumulator Battery 12V 77Ah 680A

Product currently unavailable

Part no. A1729005507

Mercedes R172 Head Unit Radio CD Player Audio A1729005507

Product currently unavailable

Part no. 6S61-18C815-AJ

Ford Transit Connect Radio Head Unit 6000 CD Media Player Unit 6S61-18C815-AJ

Product currently unavailable

Part no. 9340997

BMW F21 Door Wiring Front Passenger Door Loom Cables Harness F22 9340997

Product currently unavailable

Part no. 7N0907530M

Seat Leon Mk2 1P Central Gateway Control Unit Module Relay ECU 7N0907530M

Product currently unavailable

Part no. 7492035

Tailgate Lift Module BMW F31 F36 Mini F60 Trunk Control Unit Rear ECU 7492035

Product currently unavailable

Part no. 7512912-1

BMW X5 E53 4.4i M62 286HP Engine ECU Kit DME 7512912 + EWS3 + Key Automatic

Product currently unavailable

Part no. 7619333-3

Mini Cooper S R60 N18 ALL4 1.6 184HP ECU Kit DME 7619333 + CAS3 + Key Manual

Product currently unavailable

Part no. 6952290

Mini Cooper Cabrio R52 Convertible Folding Roof Control Unit Module ECU 6952290

Product currently unavailable

Part no. 8635808

Engine Wiring BMW F20 F30 F31 LCI B38 Loom Module 2 Harness Cable 8635808

Product currently unavailable

Part no. 7557395-1

Mini Cooper S R52 R53 W11 170HP Engine ECU Kit DME 7557395 EWS Key Manual

Product currently unavailable

Part no. 55217672

Vauxhall Corsa D 1.3 CDTI Engine Starter Motor 55217672

Product currently unavailable

Part no. 7850995

Engine Wiring BMW F80 M3 F82 M4 S55 Inject Loom Cable Harness Injector 7850995

Product currently unavailable

Part no. 9156230

BMW E60 E61 E63 Professional CCC Navigation System Controller 9159022

Product currently unavailable

Part no. 8591073-7

BMW F10 F11 LCI 520d B47 190HP Engine Control Unit ECU DDE 8591073 Manual

Product currently unavailable

Part no. 8797551

BMW X1 F48 Door Cable Front Right O/S Wiring Loom Harness 8797551

Product currently unavailable

Part no. 9252651

BMW 1 2 3 Series F20 F21 F22 F30 Radio Remote Control Receiver 868 MHZ 9252651

Product currently unavailable

Part no. 284B12763R

Smart ForTwo C453 Vauxhall Vivaro Mk2 BCM Body Control Module Unit 284B12763R

Product currently unavailable

Part no. 9231280-TS

BMW F07 Parking Module PDC Distance Control Unit Sensor Titan Silver - 354

Product currently unavailable

Part no. A9065454301

Mercedes Sprinter W906 Fuse Box Relay Control Unit Module A9065454301

Product currently unavailable

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

Product currently unavailable

Part no. A0055422118

Yaw Sensor Mercedes R171 W203 W209 ESP Rotation Rate Unit Module A0055422118

Product currently unavailable

Part no. A6461506679-1

Mercedes W203 C200 CDI OM646.962 122HP ECU Engine Module A6461506679 Automatic

Product currently unavailable

Part no. A2118704726

Seat Module Mercedes W203 CLK W209 W211 Front Memory Control Unit A2118704726

Product currently unavailable

Part no. 03P906021AB

Seat Ibiza 1.2 TDI CFWA Engine Unit Module ECU Manual 03P906021AB

Product currently unavailable

Part no. 7585249-1

BMW E87 LCI E90 116i 316i 1.6 N45N ECU Kit DME 7585249 + CAS3 + Key Automatic

Product currently unavailable

Part no. 8200660022

Renault Master Laguna 2 Opel Movano A Engine Alternator 14V 150A 8200660022

Product currently unavailable

Part no. 6C1T-12B637-CG

Ford Transit Mk7 2.4 TDCi Diesel Engine Wiring Loom Harness Cables 6C1T12B637CG

Product currently unavailable

Part no. 5A5EF33

BMW F45 F46 Mini F54 F55 F56 Head Unit Basic Media DAB Headunit 5A5EF33

Product currently unavailable

Part no. 8516262

BMW X3 F25 X4 F26 B47 Diesel Engine Harness Wiring Loom Cable 8516262

Product currently unavailable

Part no. 6866330

VDC Module BMW F20 F21 F30 F31 Rear Suspension Level Control Unit 6866330

Product currently unavailable

Part no. 3456905

Mini R56 LCI Fuse Relay Distribution Box PL3 SPEG H4 3456905

Product currently unavailable

Part no. 9339415

Harman Becker Hi-Fi F10 F11 F12 F13 Audio Speaker System Amplifier 9339415

Product currently unavailable

Part no. 9128183

BMW E90 Light Module ECU 61359128183 9128183 9128223 PL2FRMFA

Product currently unavailable

Part no. 9364819-1

BMW 1 Series E82 ECU Body Control Module M Junction Box PL2RR JBBFE IIIR 9364819

Product currently unavailable

Part no. A2059006330

Mercedes W205 SAM Module Front Body Comfort Control Unit ECU A2059006330

Product currently unavailable

Part no. 8379375

BMW X5 E53 Loudspeaker Loud Speaker Tweeter Front 65138379375 8379375

Product currently unavailable

Part no. 7790548

BMW E87 E90 E91 E92 E93 Diesel Alternator Valeo 150A Diesel 7790548

Product currently unavailable

Part no. 8506434-4

BMW E81 E84 E87 E90 LCI 18d 118d 318d N47 ECU Kit DDE 8506434 CAS3 Key Automatic

Product currently unavailable

Part no. A0009062003

Alternator Generator Mercedes W204 W207 Petrol Engine Bosch 150A A0009062003

Product currently unavailable

Part no. 9281718

Lane Departure Warning BMW F01 F02 LCI X4 F26 ECU Control Unit 9281718 F01

Product currently unavailable

Part no. A1729000402

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

Product currently unavailable

Part no. 9144776-1

Radio Professional BMW E81 E87 E90 E91 E92 Radio CD Player Head Unit 9144776

Product currently unavailable

Part no. A0009067900-1

Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A A0009067900

Product currently unavailable

Part no. 9280617

BMW F20 Diesel Front Electronic Module Control Unit FEM BCM ECU 9280617

Product currently unavailable

Part no. Halfords 56Ah Accumulator

Halfords 12V Lead Acid Accumulator Battery 56Ah 480A HB013

Product currently unavailable

Part no. 9240351

BMW X5 F20 F21 F30 E70 LCI Trunk Lid Reversing Camera Rear 9240351

Product currently unavailable

Part no. 2T1T-15K600-BD

Ford Transit Connect Central Lock Control Unit Alarm Module ECU 2T1T-15K600-BD

Product currently unavailable

Part no. 8573260-13

BMW F20 F21 116d Diesel N47N 116HP Engine ECU Kit DDE 8573260 + Key + FEM Manual

Product currently unavailable

Part no. 7638193

BMW F20 F21 F30 F31 N13 114i 116i 118i 316i Petrol Engine Starter Motor 7638193

Product currently unavailable

Part no. 2Q0971537AN

Volkswagen Polo Mk6 AW Battery Negative Cable Wiring Earth Line 2Q0971537AN

Product currently unavailable

Part no. A2129008716

Radio Head Unit Mercedes W212 COMAND Navi CD DVD Player Navigation A2129008716

Product currently unavailable

Part no. 3456952

MINI Cooper R55 LCI Footwell Light Module Unit High EKS PL3 FRM3R 3456952

Product currently unavailable

Part no. 5A7F553

BMW G26 Reverse Rear View Camera 5A7F553

Product currently unavailable

Part no. A9069006001

CD Radio Mercedes W639 W906 Audio Stereo Head Unit A9069006001

Product currently unavailable

Part no. 7856817

BMW F90 M5 F91 M8 Battery Cable Wire Lead Positive Alternator Starter B+ 7856817

Product currently unavailable

Part no. 8687064

Starter Motor BMW G30 Engine Starter Actuator Denso 8687064

Product currently unavailable

Part no. 7641652

Engine Wiring BMW F10 F31 F32 N20 Loom Module Harness Cable 7641652

Product currently unavailable

Part no. A2218208089

Mercedes W221 Antenna Amplifier Control Unit Module A2218208089

Product currently unavailable

Part no. 52400527C

Relay 4-Pin Black Voltage Control DLC Con Wysag Unit 52400527C

Product currently unavailable

Part no. A2215450001

Mercedes W221 Fuse Box Front Relay Control Unit Base Module A2215450001

Product currently unavailable

Part no. A2515450432

Air Suspension Module Mercedes S211 W251 Airmatic Control Unit ECU A2515450432

Product currently unavailable

Part no. 8517874-4

BMW F20 F21 116d N47N 116HP ECU Kit DDE 8517874 + Key + FEM + Lock Manual

Product currently unavailable

Part no. 9264974

BMW E81 E82 E87 E88 E90 E91 Front Seat Control Module 9264974

Product currently unavailable

Part no. 231A07345R

Smart Fortwo C453 Central Door Locking Control Unit Module ECU 231A07345R

Product currently unavailable

Part no. 6882266

Air Module BMW X5 F15 X6 F16 ICM SRS Control Unit ECU Bosch 6882266

Product currently unavailable

Part no. 6976964

BMW 3 5 X5 Series E39 E46 E53 BMW Radio Professional TMC Unit 6976963

Product currently unavailable

Part no. 06K907425B-16

VW Golf VII 2.0 TFSI DJHA 310HP Quattro Engine Unit ECU Kit 06K907425B Automatic

Product currently unavailable

Part no. 9247383

Air Module Control BMW X3 F25 F12 F13 Air Module Unit ECU9247383

Product currently unavailable

Part no. A9069006301

Mercedes Sprinter W906 Body Comfort Control Unit Module ECU A9069006301

Product currently unavailable

Part no. A0009067902

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

Product currently unavailable

Part no. LION 78Ah Accumulator

LION Calcium Accumulator Battery 78Ah 700A 12V

Product currently unavailable

Part no. A2115403432

Mercedes-Benz E -Class S211 Touring Wiring Harness Cable Rear A2115403432

Product currently unavailable

Part no. A1408202526

Mercedes C140 Seat Belt Module Control Unit ECU A1408202526

Product currently unavailable

Part no. 1K0971121CN

VW Volkswagen Golf 1K 5D Front Door Wiring Loom Harness Left N/S 1K0971121CN

Product currently unavailable

Part no. 8200568535-1

Renault Master 3 Vauxhall Movano B 2.3 DCI Diesel Starter Motor 8200568535

Product currently unavailable

Part no. 20983513

Vauxhall Astra J Insignia A CD Player Radio Stereo Head Unit 20983513

Product currently unavailable

Part no. A2129000206

Front Fuse Box Mercedes W204 C207 Relay Control Unit SAM Module A2129000206

Product currently unavailable

Part no. N000000004039

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

Product currently unavailable

Part no. 0445684-3

HiFi Audio Retrofit BMW E81 E87 E90 E91 E92 Connector Cable Wire

Product currently unavailable

Part no. A4479002919

Mercedes Vito W447 Head Unit Radio DAB Navigation GPS Nav Display A4479002919

Product currently unavailable

...

Showing 18019-18117 of 20414 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