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. 8W1907063AC

Audi A4 B8 Body Control Comfort Unit Module BCM Unit ECU 8W1907063AC

Product currently unavailable

Part no. 6934846-1

BMW 3 Series E91 E91N LCI Antenna Amplifier Diversity Unit 868 MHZ 6934846

Product currently unavailable

Part no. 9299265

BMW 1 2 3 Series F20 F21 F22 F30 Radio Professional CD Bluetooth Player 9299265

Product currently unavailable

Part no. A2059004433

Mercedes W205 Head Unit Radio CD Player Audio Sat Nav Multimedia A2059004433

Product currently unavailable

Part no. 5Q4959592E

Seat Leon Mk3 Door Module Control Unit Front Passenger's Side Door 5Q4959592E

Product currently unavailable

Part no. 7613226-2

Mini Cooper S R56 LCI N18 184HP ECU Kit Control DME 7613226 CAS3 Key Automatic

Product currently unavailable

Part no. 9326010

Radio Player BMW F20 F21 F30 F31 CD DAB Bluetooth Head Unit Audio Player 9326010

Product currently unavailable

Part no. A1699002400

Mercedes W169 CD Navi Media Player Radio COMAND Head Unit A1699002400

Product currently unavailable

Part no. 4F0907468D

Audi A6 C6 Diagnostic Interface Gateway Control Module Unit ECU 4F0907468D

Product currently unavailable

Part no. 8512043-3

BMW E90 E91 LCI 318d N47N 143HP Engine ECU Kit DDE 8512043 CAS3 Key Automatic

Product currently unavailable

Part no. 03G906016JA

Audi A4 B7 1.9 TDI Engine Control Unit Module ECU 03G906016JA Manual Gearbox

Product currently unavailable

Part no. 7520019-9

Mini One 1.6i R50 W10 90HP Engine ECU Kit DME 7520019 + EWS + Key Automatic

Product currently unavailable

Part no. 9149229

BMW 5 6 E60 E63 LCI Radio CHAMP Professional CD Player System Controller 9149229

Product currently unavailable

Part no. A2115457332

Mercedes W211 PDC Parking Sensor Module Control Unit A2115457332

Product currently unavailable

Part no. 8980147432

Vauxhall Astra H Corsa D Merriva B 1.7 CDTI Engine Starter Motor 8980147432

Product currently unavailable

Part no. 4H0907348C

Audi A8 D4 4H Relay Fuse Bracket Holder Junction Box 4H0907348C

Product currently unavailable

Part no. 0AH911023G

Audi Seat Skoda Volkswagen 1.2 TSI Petrol Starter Motor 0AH911023G

Product currently unavailable

Part no. 7640005

Mini Cooper R55 R56 R57 Petrol N12 DME 7640005 Engine Control Unit ECU

Product currently unavailable

Part no. A9068205626

Door Module Mercedes W906 Front Door Right O/S Control Module A9068205626

Product currently unavailable

Part no. E90 Wiring Loom Set PDC rear

BMW E90 E90N E91 E91N LCI Wiring Loom Set PDC Rear Set Complete

Product currently unavailable

Part no. 6917549

Mini Cooper R50 R52 R53 Rear Bumper PDC Ultrasonic Sensor Cosmos Black - 303

Product currently unavailable

Part no. 9224673

BMW E81 E87 E90 E91 Hands-free Electronics Charging MULF2 9224673

Product currently unavailable

Part no. 7621309

Engine Wiring Mini R56 LCI R60 N18 Loom Harness Injection Valve Ignition 7621309

Product currently unavailable

Part no. 02T911024N

Seat Ibiza 6J VW Volkswagen 6R Starter Motor 1.2 1.6 Petrol Engine 02T911024N

Product currently unavailable

Part no. 5NA980611A

Volkswagen Golf 8 CD1 Wireless Phone Charging Center Console Module 5NA980611A

Product currently unavailable

Part no. A0101540802

Mercedes W903 Diesel Engine Alternator Generator 45-90A 14V A0101540802

Product currently unavailable

Part no. 7565300-13

BMW E87 E90 118i 318i N46 129HP ECU Control Unit Module DME 7565300 Automatic

Product currently unavailable

Part no. A6519007500-5

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

Product currently unavailable

Part no. A0025424419-1

Mercedes Vito W639 Coolant Radiator Fan Relay Control Module A0025424419

Product currently unavailable

Part no. A2711538579-1

Mercedes R171 SLK 200 M271.944 163HP Engine Module ECU Kit A2711538579 Key Lock

Product currently unavailable

Part no. 8519663-17

Mini Cooper SD ALL 4 R60 N47N 143HP Diesel Engine ECU DDE 8519663 Manual Gearbox

Product currently unavailable

Part no. A4159066000

Starter Motor Mercedes W415 Citan OM607 OM608 Diesel Engine Starter 233006508R

Product currently unavailable

Part no. 8U0907441

Audi Q3 8U Camera Module Rear View Parking Camera Control Unit 8U0907441

Product currently unavailable

Part no. 8387568-1

BMW E65 Battery B Engine Compartment Terminal Point Cover 8387568

Product currently unavailable

Part no. 03L903023-1

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023

Product currently unavailable

Part no. 8T0959760B

Audi S5 8T Front Seat Control Module Unit ECU Left Right N/O/S 8T0959760B

Product currently unavailable

Part no. 9364201

BMW G30 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9364201

Product currently unavailable

Part no. A4475450069

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

Product currently unavailable

Part no. 4H0971224

Audi A8 D4 Battery Starter Alternator Harness Wiring Cable 4H0971224

Product currently unavailable

Part no. 7641652

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

Product currently unavailable

Part no. 6H52-10E958

Land Rover Freelander 2 Display Screen Multimedia Navigation Sat 6H5210E958

Product currently unavailable

Part no. 6952296

BMW 1 3 X1 Z4 Series E81 E87 E88 E89 E90 E91 E92 E93 Radio Business CD 6952296

Product currently unavailable

Part no. 1734633

Ford Fiesta MK7 1.6 TDCI Starter Motor Engine Diesel 8V2111000AD

Product currently unavailable

Part no. 6919275

BMW Z4 Series E85 E86 Body Control Unit Module GM5 Star12 Delphi 6919275

Product currently unavailable

Part no. 6942912-1

BMW E81 E82 X1 E84 E87 E90 E91 E92 Power Distribution Box Black 6942912

Product currently unavailable

Part no. 7565300-8

BMW E87 E90 E91 118i 318i N46 129HP Engine ECU Kit DME 7565300 Manual Key CAS 3

Product currently unavailable

Part no. A0005461366

Mercedes W203 W209 Relay Unit Module 2 Pins White Hella A0005461366

Product currently unavailable

Part no. 3455440

MINI Cooper One R56 PL3 SPEG H5 Fuse Distribution Box 3455440

Product currently unavailable

Part no. 7798180-2

BMW E60 E87 E90 E91 120d 320d 520d M47N2 ECU Kit DDE 7798180 CAS2 + Key Manual

Product currently unavailable

Part no. 6943854

BMW E60 E61 E63 E64 ECU Control Unit Key Reading Module CAS 2 6943854

Product currently unavailable

Part no. 9671583580

Peugeot 207 1.6 HDI Diesel Glow Plug Wiring Loom Cable Wiring 9671583580

Product currently unavailable

Part no. A0175450632

Mercedes C140 Gearbox Module Transmission Basic Control Unit A0175450632

Product currently unavailable

Part no. A6421500856

Mercedes W164 Diesel OM642 Engine Wiring Loom Harness Cable A6421500856

Product currently unavailable

Part no. 1T0880201T

Volkswagen Tiguan 5N Air Module Control Unit Module 1T0880201T

Product currently unavailable

Part no. 8E0910115H-1

Audi A4 B7 2.0 TFSI BGB Quattro 200HP Engine ECU Kit Ignition 8E0910115H + Keys

Product currently unavailable

Part no. 8803370

Display Screen Mini F55 F56 F60 Multimedia Navigation Sat Nav Unit 6,5" 8803370

Product currently unavailable

Part no. 6970701-2

Rear Bumper Antenna BMW E93 E93N LCI 2 Aerial Telephone 6970701

Product currently unavailable

Part no. 8T0971365Q

Audi A5 8T Seat Cable Front Left Right N/O/S Wiring Loom Harness 8T0971365Q

Product currently unavailable

Part no. 4KE907468F

Audi Q7 4M Gateway Interface Control Unit Module ECU 4KE907468F

Product currently unavailable

Part no. 8512498-8

BMW X1 E84 E90 LCI 20dX 320xd N47 177HP ECU Kit DDE 8512498 CAS3 Key Manual

Product currently unavailable

Part no. 8K0907063DG

Audi Q5 8R Body Control Comfort Unit Module Unit 8K0907063DG

Product currently unavailable

Part no. C11492-104

BMW F20 F30 Air Duct Front Slam Panel Flap Control Motor Drive Unit C11492-104

Product currently unavailable

Part no. 6823590

BMW F10 Footwell Light Control Unit Module ECU FRM III 6823590

Product currently unavailable

Part no. 4B0919471A

Audi TT 8N Headlight Module Ballast Relay Control Unit 4B0919471A

Product currently unavailable

Part no. A2139008409-1

Seat Module Mercedes C238 Front Right Seat Control Unit A2139008409

Product currently unavailable

Part no. A0015429619

Mercedes R129 W202 Relay Green Control Unit 12V 30A A0045450405

Product currently unavailable

Part no. 8510221-5

BMW E90 E91 LCI 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

Product currently unavailable

Part no. A2218700092

Mercedes W203 W221 Rain Light Sensor Control Module A2218700092

Product currently unavailable

Part no. A0009068806

Alternator Mercedes R172 SLC 43 AMG Petrol OM276 200A Valeo A0009068806

Product currently unavailable

Part no. a2469004716

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

Product currently unavailable

Part no. A4479058203

Mercedes Vito W447 Radio Remote Control Alarm Key Fob Unit A4479058203

Product currently unavailable

Part no. 9166279

BMW E81 E87 Boardmonitor Central Information Display Screen Control Unit 9166279

Product currently unavailable

Part no. 6971370

BMW 1 3 X1 Series E81 E82 E84 E87 E90 E91 E92 Power Distribution Box 6971370

Product currently unavailable

Part no. 1489994

Mini R50 R52 Starter Motor Engine W10 0,9KW Bosch Actuator 1489994

Product currently unavailable

Part no. A2045454701

Mercedes W204 Fuse Box Relay Control Unit Electric Module SAM A2045454501

Product currently unavailable

Part no. 9195756-2

BMW E60 LCI Radio Player Audio System Controller Head Unit 9195756

Product currently unavailable

Part no. A2215402862

Mercedes W221 Fuse Box Front SAM Module Relay Control Unit A2215402862

Product currently unavailable

Part no. 9263797-1

BMW X1 E84 Footwell Light Module Control Unit ECU PL2 FRM3R 9263797

Product currently unavailable

Part no. 7805098

BMW Mini Cooper One D R55 R56 Engine Starter Motor Diesel Valeo 7805098

Product currently unavailable

Part no. 8506666-2

Mini Cooper D R60 ALL4 N47N Diesel Engine ECU Kit DDE 8506666 CAS3 Key Manual

Product currently unavailable

Part no. 2T1U-10300-CG

Ford Transit Connect MK1 Focus MK1 Engine Alternator Generator 2T1U-10300-CG

Product currently unavailable

Part no. 7537281

BMW Z4 Series E85 M54 Wiring Loom Harness Engine Ignition Module 7537281

Product currently unavailable

Part no. 7565300-2

BMW Z4 E85 2.0i N46 150HP ECU Control Unit Module Kit DME 7565300 EWS Key Manual

Product currently unavailable

Part no. A2469016002-1

Display Screen Mercedes W176 W246 Central Information Dashboard Dash A2469016002

Product currently unavailable

Part no. 9388224

Mini F55 F56 F57 Visual Boost Surround Central Cover Instrument 9388224

Product currently unavailable

Part no. 8K0907063DC

Audi A5 8T Body Control Comfort Unit Module BCM Unit ECU 8K0907063DC

Product currently unavailable

Part no. A2115455301

Fuse Box Mercedes W211 Rear Trunk Module Relay Fuse Box SAM A2115455301

Product currently unavailable

Part no. 9172420

BMW 1 3 5 Series E60 E81 E87 LCI E90 Hands-free Bluetooth Module High MULF2

Product currently unavailable

Part no. 06H903017T-1

Audi A5 8T A4 B8 2.0 TFSI Engine Alternator Generator 06H903017T

Product currently unavailable

Part no. A1695450540

Fuse Box Mercedes W169 W245 Electrical Relay Control Unit A1695450540

Product currently unavailable

Part no. 6954007-1

PDC Module BMW E60 E61 E63 E64 E65 PDC Parking Control Module Unit ECU 6954007

Product currently unavailable

Part no. A2038705089-1

Mercedes W203 CD Media Player Radio Audio 20 Phone Head Unit A2038705089

Product currently unavailable

Part no. A2239016902

Engine Sound Generator Mercedes W177 W213 GLC C253 Front Rear Unit A2239016902

Product currently unavailable

Part no. A2479069901

Mercedes H243 Bonnet Actuator Left Right N/O/S Pedestrian Protection A2479069901

Product currently unavailable

Part no. 7616431-2

BMW E60 E90 E91 LCI 330i 530i N53 272HP ECU Kit DME 7616431 CAS3 + Key Automatic

Product currently unavailable

Part no. 8642704

Mini One F56 B38 102HP Petrol Engine ECU Control Unit DDE 8642704 Manual

Product currently unavailable

Part no. 95862083202

Porsche Cayenne 92A Fuel Tank Gauge Right O/S Sender Control Unit TDI 7P0919673

Product currently unavailable

Part no. 6938943

BMW E81 E87 E90 Hands-Free Electronics Charging Module MULF 6938943

Product currently unavailable

Part no. 7806779

MINI Cooper One D R55 R56 Alternator Generator Diesel 150A 7794970

Product currently unavailable

...

Showing 10693-10791 of 11786 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