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.

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Part no. 9289587

BMW 2 X1 Series F45 F48 Radio Antenna Amplifier Suppression Filter 9289587

€23.95

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Starter Motor Mercedes W205 W213 W238 W447 OM654 Engine Diesel A6549061600

€47.95

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Ford Transit Custom Engine Starter Motor 2.0 EcoBlue GK2T-11000-DB

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Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

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BMW F30 Hybrid 330e B48X Positive Battery Lead Cable Starter Unit Wiring 9387151

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Gearbox Wiring BMW F20 F30 125d 325d N47S1 Engine Loom Harness Cables 8507924

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BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

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Audi Q7 4L Washer Bottle Reservoir Wiring Loom Harness 4L0971767

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Audi A4 B8 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104C

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BMW X3 F25 Footwell Light Control Unit Module ECU FRM III TEMIC 9290013

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BMW F20 F30 Wiring Harness Engine Transmission Module Diesel Manual N47N 8507909

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Porsche Cayenne 9PA Rear Bumper Wiring Harness PDC Loom Cable 7L5971104E

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Audi A4 B9 Gateway Control Module Unit ECU 4M1907468D

Product currently unavailable

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Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

€23.95

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Mercedes S205 Display Screen Multimedia Navigation Sat Head Unit A2059004113

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

€170.95

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Mercedes W176 Door Harness Loom Cable Wiring Front Left Right N/O/S A2465402705

€23.95

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Battery Cable Mercedes W176 W246 Positive Wiring Starter Harness A2465407832

€170.95

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Headrest Adjustment BMW E46 E64 Front Right O/S Seat Actuator 8267406

€23.95

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Energy Distributor Mercedes W205 W238 Power Control Unit Module A0009822112

€23.95

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Mini F54 F55 F56 F57 F60 Rain Light Solar HUD Sensor 9496244

€66.95

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BMW E46 M3 Z4 E85 M3.2 Engine Starter Motor Valeo 7834214

€85.95

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Part no. 1K0907719C

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719C

€23.95

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Part no. A2229005415

Mercedes W205 W213 W222 Comunication Module Telematic Bluetooth A2229005415

€75.95

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Part no. 7160897

BMW X5 E53 E60 E61 E65 E81 E87 E90 E91 Turn Indicator Silver Bulb 7160897

€23.95

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Part no. 6920472

BMW 7 Series E65 E66 E67 Sensor Vehicle Centre AIRBAG

€23.95

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BMW 5 X5 Series E39 E53 Dual Band Cable Compensator Hands Free Phone 6907520

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Part no. A2055455100

Mercedes W205 W213 C238 Power Distribution Unit Busbar Connector A2055455100

€37.95

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Part no. E92-PDC-WIRING-LOOM-HARNESS-REAR-BUMPER-2

BMW E92 E92N LCI PDC Wiring Loom Harness Rear Bumper

€23.95

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Audi A8 4H Rear Door Module Control Unit Left Right N/O/S 4H0959795E

€23.95

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Mini F60 Countryman Door Wiring Harness Rear Left Right N/O/S 6805893

€37.95

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Volkswagen Touareg 7P Negative Battery Cable Wiring Loom 7P0971225B

€23.95

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BMW 5 Series F10 F11 B Plus Distributor Box Front Battery Cable Unit 9153418

€23.95

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Rear Bumper Antenna BMW E93 E93N LCI Aerial Telephone 6970701

€28.95

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Part no. A2128203589

Antenna Amplifier Mercedes W212 Aerial Module Rear Roof Frame Right A2128203589

€23.95

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Head Unit Mercedes W447 Radio Navigation Audio 15 Control Unit A4479002405

€218.95

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BMW X3 F25 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9271216

€66.95

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Audi A3 8V Module BCM Body Control Unit Module ECU 5Q0937084AE

€32.95

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Mercedes W204 Stereo Radio Autoradio CD Player Head Unit A2049003211

€47.95

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FEM Module BMW F20 F22 F30 F32 ECU Control Unit Fuse Box 9395176

€132.95

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Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465400082

€28.95

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Ford Transit Connect PDC Parking Aid Warning Control Module Unit AT1T-15T850-AA

€23.95

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Mini Cooper One R55 R56 R57 LCI R60 Radio Boost CD Player Unit Head 3456995

€237.95

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Mercedes CLK A209 Cabrio Alarm Anti Theft System Control Module Unit A2098209810

€32.95

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Door Module Mercedes C118 W177 H243 Front Right O/S Door Control A1779005409

€80.95

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Renault Relay III Unit Module 4 Pins 12V 8200263345

€23.95

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Mercedes GLA X156 Tailgate Lift Boot Lid Control Unit Module A2469003615

€70.95

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Mercedes W177 M260 Petrol Engine Wiring Cable Loom Harness A2601503100

€189.95

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Audi Q7 4L Air Module Control Unit ECU Impact Sensor 4L0959655C

€23.95

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Mercedes W204 Automatic Gearbox EGS Control Module Unit ECU A0005454516

€31.95

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Mini Cooper One R50 R53 Loudspeaker Rear 65136956166 6956166

€23.95

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Porsche Macan 95B Battery Starter Motor Alternator Wire Cable Loom 95B971228AA

€94.95

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Porsche Macan 95B PDC Parking Sensor Wiring Rear Bumper Loom 95B971104T

€170.95

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Part no. 9216468

BMW F10 F11 F20 F30 F31 Front Seat Heating Control Module ECU 9216468

€23.95

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Part no. A0038207726

Mercedes W212 Siren Alarm Horn Signal Module Unit A0038207726

€23.95

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Part no. A2059001811

Mercedes W205 Rear Door Control Module Unit Left N/S ECU A2059001811

€23.95

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Part no. A1698702210

Mercedes-Benz A B W169 W245 Tow Protection Switch Button Control Unit Module

€23.95

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BMW 2 Series F23 Convertible Rear Trunk Tailgate Antenna Aerial DAB 9277812

€67.95

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BMW F20 F21 F22 F30 F31 F33 F34 Air Module Control Unit ECU 9296495

€23.95

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Part no. 6958525-1

BMW 5 X5 X6 Series 1 E60 E61 E70 F07 F10 F11 Seat Adjustment Switch Left N/S

€23.95

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Part no. 1508927-1

Mini Cooper S R52 R53 Positive Battery Cable Fuse Box Module B 6911180

€23.95

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Part no. A2535403718

Mercedes X253 Rear Bumper Electrical Wiring Harness A2535403718

€66.95

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Door Module Mercedes C118 W177 H243 Front Left N/S Door Control A1779005409

€123.95

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BMW E90 E91 LCI Flat Cable Wiring Wire CAS Start Stop ECU Loom 7222633

€23.95

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BMW 5 6 Series E60 E61 E63 LCI Cable Set Start / Stop Switch Wiring Loom 6970087

€23.95

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Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

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Part no. A6071550335

Alternator Belt Tensioner Mercedes W176 OM607 Diesel Holder Mounting Panel

€37.95

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Battery Mounting Bracket Mini Cooper R55 R56 R57 R60 R61 Clamp Bolt Holder

€23.95

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Ignition Coil BMW E81 E87N LCI E90 E91 E92 F10 F11 Bosch 7638477

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Mini Cooper R55 R56 R57 LCI R60 R61 Radio Boost CD Player Unit Head 3457568

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Audi A3 8Y Seat Belt Warning System Wiring Harness Cable Loom System 8Y0971365N

€23.95

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BMW F31 Antenna Aerial Diversity Trap Circuit 9231518

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Fuse Box Mercedes W177 Relay Fuse Box COntrol Module Unit A1779061102

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Audi TT FV HV Battery Negative Terminal Cable Harness Loom Wiring 8S0915181A

€23.95

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Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050338

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Mercedes W906 314 CDI OM651 Engine Module ECU Kit A6519003403 Automatic

€474.95

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Mercedes W639 116 CDI 651.940 163HP Engine Module ECU Kit A6519009302 Key Lock

€427.95

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Audi A6 C7 High Pressure Pump Fuel Line Electrical Wiring Harness 059971627D

€23.95

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Mercedes-Benz A M Class W166 W176 Parking Brake Control Unit Module ECU

€23.95

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BMW F20 Front Electronic Module Body Control Unit FEM ECU 9314229

€284.95

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BMW E81 E84 E87 E90 E91 Parking Control Module Unit PDC 6982394

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BMW F20 F21 F30 Wiring Loom Harness Injection Valve Ignition 7607973

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Mercedes W221 Dashboard Fuse Box Front Left N/S Control Module A2215450601

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BMW F20 F21 F22 F30 F31 F32 Mini F55 F56 F57 Head Unit Basic Media DAB 8794297

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BMW X5 E53 Fuse Distribution Box Relay Board 6907395 8380409 6909721

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Parking Sensor BMW E81 E87 E90 E91 PDC Front Rear Titansilber Silver - 354

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Audi A3 8V Wireless Charger Centre Console Phone Charging Module Unit 81A035502

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BMW Mini Cooper R50 R52 R53 JCW Fuse Box Housing 6906600

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Part no. 8672514-1

BMW F80 M3 F82 F83 M4 431HP Engine Control ECU Kit DME 8672514 + FEM Module Key

€1,139.95

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Part no. 7823973-1

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 7823973 CAS3 + Key

€189.95

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Part no. 95B907159T

Porsche Macan 95B Engine Sound Generator Actuator Module Control Unit 95B907159T

€165.95

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Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

€66.95

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Part no. EL2T-19A391-ACW

Ford Transit Custom Mk8 Bluetooth Microphone Unit Module EL2T-19A391-ACW

€42.95

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Showing 1684-1782 of 12466 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 .

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