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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Products in promotion

Part no. A0009008709

Mercedes W213 Tyre Pressure Control Module Unit A0009008709

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4E0941285G

Audi S8 D3 Front Headlight Level Control Sensor Left N/S 4E0941285G

PLN 208.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9371386

BMW 4 Series F33 F83 M4 Convertible Top Module CTM Unit 9371386

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8T0907468AD

Audi A4 B8 Gateway Interface Control Unit Module ECU 8T0907468AD

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9283529

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9283529

PLN 664.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2218211251

Mercedes W221 Dashboard Instrument Cluster Panel Button Switch A2218211251

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. DK3T10B728AA

Ford Transit Battery Charge Electrical Machine Control Module Unit DK3T10B728AA

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0907159J

Audi A4 B9 A5 F5 Impact Sound Actuator Control Module 8W0907159J

PLN 170.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6925942

BMW E60 E61 Cable Loom Door Wiring Harness 6925942

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6803169

Air Con Module BMW F20 F30 F31 Mini F55 F56 Air Conditioning A/C Unit 6803169

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8605454

Engine Wiring BMW F10 F21 F30 LCI F36 N20 Loom Module Harness Cable 8605454

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4M0907401AM

Audi Q7 4M 3.0TDI DPXB Quattro 218HP Engine Control ECU 4M0907401AM Automatic

PLN 3,229.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1728208710

Mercedes W176 W246 Roof Towing Alarm Sensor Switch Module A1728208710

PLN 46.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9365819

BMW X5 F15 Wiring Rear Right O/S Door Harness Loom 9365819

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0959592E

Audi A4 B9 Front Door Control Module Unit Passenger Side ECU 8W0959592E

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9207515

BMW X1 E84 Battery Cable Wire Lead Positive 9207515 61129207515

PLN 427.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 03L906018JG

Audi A5 8F 2.0 TDI CGLC 177HP Diesel Engine Control Unit ECU 03L906018JG Manual

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9875929

BMW F20 F21 F22 F23 LCI DAB Navigation Head Control Unit Module Business 9875929

PLN 712.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0959792

Audi A4 B8 Door Module Control Unit Module ECU Front Left N/S 8K0959792

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8663284

BMW F20 F30 F31 LCI B38 ECU Basic DME Control Unit Automatic Gearbox 8663284

PLN 1,614.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2055406304

Mercedes W205 Hybrid Battery Cable Starter Wiring Loom Harness A2055406304

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. BK21-12B681-AA

Ford Transit Custom Mk8 Glow Plug Relay Unit 2.2 Diesel BK21-12B681-AA

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2125403005

Mercedes W212 M271 Wiring Battery Alternator Starter Harness Cable A2125403005

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0014460340

Mercedes W245 B150 CDI OM266.920 Engine Control Unit Module ECU A0014460340

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9348935

BMW X1 F45 F48 Mini F55 F56 F60 Air Module Control Unit Module ECU 9348935

PLN 617.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 2383676

Battery Cable BMW F22 Negative Earth Cable Minus Electrical Wire 7625999

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9240077

BMW E93 Cabrio Convertible Folding Top Roof ECU Module CTM 9240077

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7850609

BMW F80 M3 F82 M4 LCI Cable Wheel Acceleration Sensor 7850609

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1669003602

Mercedes W204 R172 DAB Receiver Digital Audio Control Unit Module A1669003602

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3455305

Mini R57 R57N R58 R59 DWA-Alarm System Relay ECU 3455305 65753455305

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2229005118

Mercedes W205 Ambient Color Light Module ECU A2229005118

PLN 70.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3B0035711B

Seat Leon Mk3 5F Hands Free Microphone Module Speaker Wiring Loom 3B0035711B

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 9153137

BMW F01 F02 F03 Holder Bracket Control Unit Top Rear Side View 9153137

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. P1WA-7P238-GA

VW Amarok Mk2 Transfer Case Box Control Unit Module ECU ECU P1WA-7P238-GA

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5N0971235A

Audi A3 8P VW Golf MK6 Battery Negative Earth Cable Harness Wiring 5N0971235A

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2059003740

Mercedes A205 Convertible Comfort Control Unit Module A2059003740

PLN 393.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6864208

BMW F20 F21 F22 F30 F31 Air Module ECU ICM Control Unit 6864208

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 09G927750FD

VW Volkswagen Tiguan 5N Automatic Gearbox Module Control Unit ECU 09G927750FD

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2168204726

Mercedes W221 Bluetooth Control Module Mobile Phone Interface A2168204726

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8506281-3

BMW E81 E87 LCI E90 N47 115HP Diesel Engine Control Unit ECU DDE 8506281 Manual

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009002308

Mercedes W447 W906 Adblue Module Exhaust Gas Control Unit ECU A0009002308

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9118111

BMW 1 Series E81 E82 Door Wiring Loom Harness 9118111

PLN 56.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2474703702

Mercedes W177 W247 Solenoid Valve Line Pipe Hose Starter A2474703702

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0971687S

Audi A4 B8 Door Wiring Harness Loom Rear Left N/S Cabling 8K0971687S

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6843898

BMW F20 F21 F22 F30 F31 F32 Body Control Module Unit FEM ECU LR01 6843898

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G5907468K

Audi A6 C7 Gateway Interface Electrical Control Unit Module ECU 4G5907468K

PLN 712.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9328591

BMW X6 F16 Boot Trunk Lid Tailgate Wiring Loom Harness Cable 9328591

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6900583-1

BMW 7 Series E65 E66 Cable Wire Power Distribution Box 6900583

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2218101817

Mercedes-Benz W221 Rear Left Right N/O/S Headlining Interior Mirror A2218101817

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A0535450226

Mercedes Sprinter W906 Fuse Box Connector Plug Socket A0535450226

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8T0035225J

Audi A5 8T Antenna Aerial Amplifier Module Control Unit 8T0035225J

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 382327

Ultrasonic Module Mini Countryman Paceman R60 R61 Alarm System Sensor 0382327

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6923502

Mini R50 One D Diesel W17 Cable Starter Base B- Wire 6923502

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6929556

BMW E65 E66 Driver's Seat Air Module Sensor Control Unit Module 6929556

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6824116

BMW 3 F30 LCI 330e Hybrid High Voltage Battery Wiring Inverter Cable 6824116

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7574294

Mini Cooper S R56 Automatic Gearbox TCU ECU Control Unit EGS Module 7574294

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

PLN 275.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. F1ET-14F142-BC

Ford Transit Connect Door Module Front Left N/S Control Unit ECU F1ET-14F142-BC

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 6821407

High Voltage Cable BMW F45 Mini F60 Hybrid Harnes EDH 6821407

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9167198

BMW 1 3 Series E81 E87 E92 E93 Towing Tow Bar Trailer Hook Module Control Unit

PLN 360.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9252550

BMW F10 F12 F20 F21 F22 F30 F31 Front Seat Control Module ECU 9252550

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0971250P

Audi S3 8V Battery Wire Cable Negative Earth Lead 95Q0971250P

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0919275-SDA

Skoda Octavia 1Z PDC Parking Sensor 4H0919275 Anthracite Grey Metallic - F8J

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 7243564

BMW F20 F30 Front Sport Seat Backrest Heating Mat Element 7243564

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W1907064BL

Audi A4 B9 Body Control Module BCM Comfort Control Unit Power Supply 8W1907064BL

PLN 759.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2128204713

Seat Wiring Mercedes W212 Front Loom Harness Passenger Side A2128204713

PLN 66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9365833

Business Navigation BMW F20 F21 F30 F31 Sat Nav Head Unit Player 9365833

PLN 284.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8610635-3

BMW F20 F30 F31 120i 320i N20 184HP Engine Control Unit ECU DME 8610635 Manual

PLN 949.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7394466

BMW F10 F11 X5 F15 LCI F32 F33 Adblue Module Control Unit ECU SCR 7394466

PLN 332.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0959795P

VW Touareg 7P Rear Door Module Control Unit Left Right N/O/S 4H0959795P

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0971036B

Audi RS4 B8 Door Wiring Harness Cable Loom Front Right O/S 8K0971036B

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2078201989

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201989

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2055409240

Mercedes W205 Front Door Electric Wiring Harness Loom Cable Left N/S A2055409240

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9347914

BMW 5 Series F07 F10 F11 CAS4 Control Unit Key Reading Module 9347914

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 13150706

Opel Corsa D Head Air Module Roof Side Curtain 13150706

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2189015200

Mercedes X218 Air Module Control Unit ECU Module A2189015200

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G8959795G

Audi A6 C7 Rear Door Control Module Unit ECU Left Right N/O/S 4G8959795G

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 899543000

Porsche Boxster 986 A/C Air Conditioning Relay Control 12V 10A 899543000

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. A2479002307

Mercedes W177 W247 4Matic Transfer Control Unit Module ECU A2479002307

PLN 569.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2035407408

Mercedes-Benz C W203 Rear Left Right Door Wiring Loom Harness A2035407308

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 95B907159T

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

PLN 712.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2205401124-1

Fuse Box Unit Mercedes CL S C215 W220 1 Front Right O/S ECU A2205401124

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2055457540

Mercedes W205 C238 X253 W213 Inner Firewall Contact Support A2055457540

PLN 93.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3D0971235AD

VW Volkswagen Phaeton Mk1 Battery Negative Terminal Wire Cable 3D0971235AD

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6832924

BMW 4 Series F33 F83 M4 Switch Folding Top Sliding Up Down Roof 9366374

PLN 94.95

Free delivery - Tue, Jan 13

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Part no. 9207360

BMW E60 E87 LCI E90 Hands-free Bluetooth High Basis MULF2 9207360

PLN 237.95

Free delivery - Tue, Jan 13

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Part no. 9365304

BMW F10 F20 F23 F30 Bluetooth Teleservices GPS Telematics Control Module 9365304

PLN 94.95

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If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

PLN 42.95

Delivery - Tue, Jan 13

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Part no. A2079011800

Mercedes W204 W207 Control Unit ECU Sensor Module Air SRS Bag A2079011800

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8V0971228

Audi RS3 8V 2.5 TFSI Quattro Starter Motor Battery Cable Wiring 8V0971228

PLN 123.95

Free delivery - Tue, Jan 13

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Part no. A4709820700

Mercedes W470 Glow Plug Relay Module Unit A4709820700

PLN 94.95

Free delivery - Tue, Jan 13

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Part no. A2034400033-2

Mercedes CLC CL203 Wiring Loom Cable Door Front Left Right N/O/S A2034400033

PLN 47.95

Delivery - Tue, Jan 13

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Part no. 3452166

BMW X3 E83 Air Module Control Unit ECU 3452166

PLN 208.95

Free delivery - Tue, Jan 13

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Part no. A1765406708

Mercedes W176 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1765406708

PLN 85.95

Free delivery - Tue, Jan 13

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Part no. 8506199-3

BMW E60 E61 LCI 520d Diesel N47 Engine ECU Kit DDE 8506199 CAS 3 + Key

PLN 664.95

Free delivery - Tue, Jan 13

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Part no. 4F9971085E

Audi A6 C6 Avant Rear Bumper PDC Wiring Loom Parking Sensor 4F9971085E

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9197177-1

BMW 1 Series E88 Cabrio Footwell Light Module Control Unit ECU NSW 9197177

PLN 170.95

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Part no. 8E0959433CH

Audi A4 B7 Comfort Convience Module Control Unit 8E0959433CH

PLN 237.95

Free delivery - Tue, Jan 13

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Part no. 7990758-CAR

BMW F33 PDC Ultrasonic Parking Sensor PDC 7990758 Carbonschwarz Metallic - 416

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

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Showing 2872-2970 of 12189 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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