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. A2469000516

Radio CD Player Mercedes W176 W246 COMAND Nav Sat Head Unit A2469000516

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9337879

BMW 1 3 4 Series F20 F21 F30 F31 F34 Power Distribution Fuse Box Front 9337879

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6948689

BMW E60 E61 E63 Driver Side Door Air Module Control Unit Module 6948689

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 3414469

BMW X3 E83 Fuse Grouping Front Stick-on Label Diagram 9267980

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 6904620

BMW 7 Series E65 E66 Diversity Antenna Tuner Amplifier Wiring 6904620

PLN 18.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 1388911-1

BMW E36 E38 E85 Mini R52 R57 2x Change-Over Contact Relay Violet Set 1388911

PLN 42.95

Delivery - Mon, Nov 24

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Part no. 7L0909606D

Volkswagen Touareg 7L Front Impact Crash Sensor Right Left N/O/S 7L0909606D

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 2GA035284B

Audi Q2 GA Online Services Control Module ECU Unit 2GA035284B

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2034404913

Mercedes-Benz CLC CL203 Rear Tailgate Boot Lid Wiring Harness Loom A2034404913

PLN 65.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8585727

Wiring BMW F21 F30 F34 F36 Diesel N47N Engine Gearbox Module Harness 8585727

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2139005311

Mercedes W213 Head Unit CD Media Player Audio Auto Radio Controller A2139005311

PLN 712.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9247081

BMW X1 E84 Wiring Loom Harness Passenger Side 9247081

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2535400701

Mercedes A238 M276 Engine Alternator Wiring Loom Harness A2535400701

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2048205497

Mercedes W204 Display Screen Radio Multimedia Navigation Sat Unit A2048205497

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9264974

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

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6940623

BMW 1 3 Series E81 E82 E84 E87 E90 E91 PDC Parking Ultrasonic Sensor Quartz Blue

PLN 61.95

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If paid before 14:00

Part no. 6977982

Mini Cooper R50 R56 R57 R60 Relay No Contact Taubenblau 6977982

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8576333-3

BMW F20 F30 F32 120dX 320dX 420dX Diesel N47N 184HP ECU Kit DDE 8576333 Key FEM

PLN 902.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6970908

BMW E65 E66 Sensor Front Right Door Airbag O/S 6970908

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6938504

Battery Cable BMW E90 E91 E92 E93 Positive Lead Battery Wiring Harness 6938504

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 6838609

Antenna Amplifier BMW F40 Aeral Diversity Control Unit FM DAB Live Dash 6838609

PLN 104.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6986987

BMW Z4 Series E85 Cable Loom Passenger's Door Wiring Harness 6986987 6986982

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9263948

BMW E81 E90 LCI Business System Car Infotaiment Computer CIC 9263948

PLN 759.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2115408445

Gateway Module Mercedes W169 W211 W245 W219 W203 Control Unit ECU A2115408445

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0907247A

Keyless Entry Amplifier Audi A4 B9 A5 F5 Control Box Module Antenna 4M0907247A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9130047

BMW 3 4 5 Series E92 F32 E61 LCPA Seat Belt Module ECU

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8582279-7

BMW F30 F32 320d Engine Module Control Unit ECU DDE ed 420d N47N 163HP 8582279

PLN 170.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6836210

Telematics Control Unit Mini F54 F55 F56 F57 F60 Module 84106836210 6836210

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959792F

VW Touareg 7P Front Door Control Module Unit ECU Passenger Side 4H0959792F

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 070903327C

Volkswagen Touareg Transporter 2.5TDI Alternator Coupling Sleeve Belt 070903327C

Product currently unavailable

Part no. A2469066600

Fuse Box Mercedes W156 W176 W246 Front Relay Control Unit Module A2469066600

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9374506

Body Control Unit BMW F20 F21 F30 F31 F32 Module REM 9374506

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1679008406

Mercedes W167 W177 W247 Ignition Engine Control Unit Module A1679008406

PLN 712.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6950131

BMW X3 E83 Z4 E85 Front Rear Door Mid-range Audio Loudspeaker 6950131

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9688268580

Citroen C4 Starter Motor Diesel Engine 1.6 HDI Actuator Unit 9688268580

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8506444-1

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8506444 CAS3 + Key

PLN 1,139.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959651

Audi A6 C6 Front Impact Sensor Safety Crash Detection Module Unit 4F0959651

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7796127

BMW X5 X6 Series E70 E71 Diesel Battery Cable Starter-Base B+ 7796127

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 6887358

BMW F10 F11 EMF Module Parking Brake Unit Electric Control 6863800

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. A6396890279

Mercedes Viano Vito W639 Radio Fan Adapter Control Unit Module A6396890279

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9236520

BMW X1 E84 Front Bumper Loom Cable Harness Parking Sensors PDC Wiring 9191449

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7807827-1

BMW 1 3 Series E87 E90 LCI 120d 320d N47 Diesel ECU Kit DDE 7807827 CAS3 Key

PLN 712.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5WA980653C

Audi A3 S3 RS3 8Y Front Camera FAS Lane Assistance Control Unit 5WA980653C

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0971224BA

Audi A8 D4 Alternator Starter Motor Wiring Harness Cable Loom 4H0971224BA

PLN 427.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9270356-2

Fuse Carrier BMW F40 Mini F55 F56 F57 F60 Distribution Box 9270356

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9875930

BMW G20 Head Unit Navigation Audio Player Controller Module 9875930

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6932644-1

BMW 3 5 Series E60 E71 E90 E92 Suppression Filter Aerial Module Antenna 6932644

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 6913389

BMW X3 X5 Z4 E53 E83 E85 6 Disc CD Changer Multichanger Without Magazine

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1685400830

Mercedes A W168 Petrol Engine Starter Alternator Electrical Cable A1685400830

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9857620

Door Wiring Mini F60 Cable Loom Rear Left Right N/O/S Harness 9857620

PLN 170.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0907719B

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719B

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 7E0907655A

Audi TT 8J ESP YAW Lateral Acceleration Sensor 7E0907655A

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9216286

BMW F20 F21 Socket Plug Wiring Loom Cable 9216286

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9119495

BMW E92 ECU Body Control Module Junction Box L1 PL2 JBBFE 9119495

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8482365

BMW G20 Installation Cable Wiring Loom 8482365

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 2GA035284A

Seat Ibiza KJ1 VW Polo MK6 Online Services Control Module ECU Unit 2GA035284A

PLN 598.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0971365

Audi A1 8X Driver's Seat Cable Seat Belt Warning Wiring Loom Harness 8X0971365

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A0018209326

Mercedes-Benz E CLS Class W211 W219 Crash Sensor Left Right N/O/S A0018209326

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9285505

Distribution Junction BMW X5 X6 F15 F16 Power Battery Control Unit 9285505

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A4479060400

Mercedes W447 Fuse Relay Box Module Control Unit A4479060400

PLN 263.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9323554

BMW 1 3 Series F20 F21 F30 Operating Unit Audio FBM Control Unit Panel 9323554

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0919283A

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 7075944-2

BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9267516

BMW F10 Central Gateway Module Control Unit Lear ZGW-02 MID Plus 9267516

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K590735700

Audi A5 8T Front Lamp Xenon Headlight Range Control Module 8K590735700

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 918545-102

BMW F11 Wiring Cable Loom 918545-102 767832-113

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3Q0907530AA

Audi Seat Skoda Volkswagen Gateway Control Unit Module ECU 3Q0907530AA

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2533402600

Mercedes X253 Hybrid GLC Battery Electrical Wiring Harness A2533402600

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7801711-1

BMW X3 E83 2.0d M47N2 Engine Control Unit Module ECU DDE 7801711 Manual

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6949229-1

2 x Mini R52 Convertible DWA Door Alarm System Module Control Unit Set 6949229

PLN 47.95

Delivery - Mon, Nov 24

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Part no. 5F4035225B

Seat Leon Mk3 Antenna Amplifier Module FM Right O/S Aerial Booster 5F4035225B

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8971365

Audi A7 4G Seat Cable Front Left Right N/O/S Wiring Loom Harness 4G8971365

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1698207426

Mercedes-Benz A B Class W169 W245 Door Control Unit Right O/S Rear A1698207426

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. A4479000900

Mercedes Vito W447 Air Module Control Unit ECU 4479000900

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1725400035

Electrical Cable Mercedes R172 Transmission To Body Wiring Harness A1725400035

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. A2215408045

TPM Module Mercedes W221 S500 C216 Tire Pressure System Module RDK A2215408045

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 7638477

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 9383069

Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav High Control Module 9383069

PLN 1,709.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8704090

BMW F20 F21 F30 Mini F55 F56 HSD Cable HU CID Wiring Cable 8704090

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 9454245

Differential Locking Module BMW F90 M5 G20 Rear Axle Control Unit ECU 9454245

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8489325

BMW i3 I01 94Ah Rex Hybrid Basic Control Unit Module ECU 8489325

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907401-1

Audi A8 4H 3.0 TDI CDTA 250HP Quattro Engine ECU Kit 4H0907401 BCM + Key + Lock

PLN 1,614.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6771182

BMW E90 E91 E92 E93 Longitudinal Dynamic Module Cruise Control 6771182

PLN 42.95

Delivery - Mon, Nov 24

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Part no. A1775401629-1

Mercedes W177 Rear Bumper PDC Wiring Loom Parking Sensor A1775401629

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1679008207

Telematics Module Mercedes W177 W247 Communication Control Unit ECU A1679008207

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5N0035341G

Volkswagen Golf Scirocco CC Multimedia Interface Module Box 5N0035341G

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1649100075-1

Mercedes ML W164 Lumbar Module Front Seat Lumbar Control Unit A1649100075

PLN 237.95

Free delivery - Mon, Nov 24

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Part no. A2118206185

Mercedes E S Class W211 W220 Telephone Hands Free Control Module A2118206185

PLN 47.95

Delivery - Mon, Nov 24

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Part no. A0009057908

Mercedes C238 Rear Bumper Blind Spot Radar Sensor Left Right N/O/S A0009057908

PLN 474.95

Free delivery - Mon, Nov 24

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Part no. 8574102

BMW F20 F21 F30 F31 F32 Starter Motor Engine Actuator N47N Diesel 8574102

PLN 42.95

Delivery - Mon, Nov 24

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Part no. A1725401450

Mercedes SLK R172 Fuse Box Power Distribution Control Module Unit A1725401450

PLN 94.95

Free delivery - Mon, Nov 24

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Part no. 391144A240

Hyundai H-1 2.5 Diesel Engine Control Unit Module 39114-4A240 Manual

PLN 949.95

Free delivery - Mon, Nov 24

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Part no. 6947216

BMW 3 Series E93 Convertible Rear Bumper FM Radio Aerial Antenna 6947216

PLN 75.95

Free delivery - Mon, Nov 24

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Part no. A2049000300

Mercedes W212 Media Interface Control Unit Module Communication A2049000300

PLN 42.95

Delivery - Mon, Nov 24

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Part no. 6928376

BMW 5 6 Series E60 E61 LCI E63 E64 Cable Wiring Set ARS Valve Block 6928376

PLN 113.95

Free delivery - Mon, Nov 24

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Part no. 9117831

Negative Battery Lead BMW F45 F46 X1 F48 IBS Minus Pole Cable 9117831

PLN 61.95

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Part no. 4H0919275-SHB

VW Golf Mk6 Audi TT 8J Parking Distance Control Sensor Shark Blue Metallic - A5Q

PLN 42.95

Delivery - Mon, Nov 24

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Part no. 8W1907063CC

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W1907063CC

PLN 759.95

Free delivery - Mon, Nov 24

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Part no. 7571142-1

Mini Cooper R55 R56 R57 Battery Cable Wiring Lead Power Positive 7571142

PLN 47.95

Delivery - Mon, Nov 24

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Showing 1-99 of 11489 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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