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. 4F0907280E

Audi Q7 4L On Board Power Supply Control Module Unit ECU 4F0907280E

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0937084DC

Audi A3 RS3 8V Body Control Module BCM Control Unit ECU Power Supply 5Q0937084DC

PLN 132.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0035056B

Audi A6 C6 Head Unit Radio CD Player Control Unit Module 4F0035056B

PLN 854.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0937084DR

Audi Q2 GA Body Control Comfort Unit Module BCM Unit ECU 5Q0937084DR

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4D0907131

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 12V 4D09907131

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0907063M

Audi A4 B8 A5 8T Body Control Comfort Unit Module Unit ECU 8K0907063M

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0959593H

Audi A4 S4 B9 Front Door Control Module Unit Driver's Side 8W0959593H

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8A0937530

Audi A6 C6 Fuse Relay Box Module Unit Holder Bracket 8A0937530

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0919275-DGR

Audi TT 8J PDC Parking Distance Sensor Control Daytona Grey Pearl Z7S 4H0919275

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0959792P

Audi A6 C6 Front Door Lock Control Module Unit ECU Passenger Side 4F0959792P

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0915181

Audi TT FV 8S Negative Battery Cable Lead Monitoring Module 8W0915181

PLN 70.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4E0035654A

Audi A6 C6 MMI Multimedia Navigation Control Head Unit 4E0035654A

PLN 1,073.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0907530S

Audi A3 8V Gateway Control Module Unit ECU 5Q0907530S

PLN 161.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0419065D

Audi A4 B9 A5 F5 Power Steering Column Control Unit Module 8W0419065D

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W6971036G

Audi A4 B9 A5 F5 Front Door Wiring Harness Cable Passenger Side 8W6971036D

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8R0907468C

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468C

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8V5035225

Audi A3 8V Keyless Entry Amplifier Control Box Module Aerial Antenna 8V5035225

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4L0907357

Audi Q7 4L Headlight Level Range Adjustment Module Control Unit 4L0907357

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8Y0971036E

Audi A3 8Y Front Door Card Wiring Harness Loom Cable Passenger Side 8Y0971036E

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0959655E

Audi A6 C6 SRS Crash Air Module Safety ECU Unit Control 4F0959655E

PLN 127.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 03G903139D

Audi A4 B7 Engine Alternator Mount Support Bracket 1.9 2.0 TDI 03G903143D

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 81A035035G

Audi Q2 GA Sat Nav Multimedia Control Unit Module SD SIM MIB2 HIGH 81A035035G

PLN 3,324.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4M0941828H

Audi Q7 4M Fuse Box Battery Terminal Cover Housing 4M0941828H

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0959663D

Audi Q3 8U A3 8P A6 C7 Voltage Stabilizer Converter Control Module 8K0959663D

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G0937517

Audi A6 C7 Fuse Battery Junction Box Fuse Distribution Terminal Centre 4G0937517

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 059906627L

Audi Q7 4L Quattro Diesel 3.0 TDI Charge Air Pressure Valve Actuator 059906627L

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8P0907404-1

Audi RS3 8P 2.5 TFSI CEPA Quattro 340HP Engine Unit ECU Kit 8P0907404 Automatic

PLN 4,749.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F1971693G

Audi A6 C6 Rear Door Wiring Harness Cable Loom Left Right N/O/S 4F1971693G

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0915181H

Audi A1 8X Negative Minus Battery Terminal Cable 1.4 TFSI CAXA Petrol 8K0915181H

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8S0035021E

Audi TT FV Mk3 Navi SD GPS MMI Multimedia Head Unit Module 8S0035021E

PLN 2,374.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8X0959793E

Audi A1 8X Q3 8U Front Door Module Driver's Side Control Unit ECU 8X0959793E

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 05E907309CB

Audi Q2 GA 35 TFSI 1.5 DXDB Engine ECU Kit Ignition + Key 05E907309CB Manual

PLN 1,424.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0035225

Audi A8L 4H Aerial Antenna Amplifier AMP Booster Module 4H0035225

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 06L971627A

Audi S1 8X S3 8V VW Golf R Mk7 2.0 TFSI Fuel Injectors Wiring Harness 06L971627A

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0907539

Audi A5 S5 8T Dashboard Sunlight Solar Sun Sensor 8K0907539

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0906093F

A4 B9 35 TFSI Fuel Pump Sender Control Relay Module Unit ECU 8W0906093F

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0907064KB

Audi A5 8T Body Control Comfort Unit Module BCM Convenience Unit ECU 8K0907064KB

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0959795E

Audi A6 C6 Rear Door Left N/S Module Unit Control ECU 4F0959795E

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0881073B

Audi A8L 4H Front Seat Air Pump Control Module Unit 4H0881073B

PLN 94.95

Free delivery - Tue, Jan 13

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

If paid before 14:00

Part no. 8J0035456

Audi S5 8T Antenna Amplifier Aerial Control Module Unit ECU 8J0035456

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 420919275-BLM

Audi A5 8T Rear Bumper PDC Parking Distance Sensor Black Magic Pearl - C9Z

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0910655Q

Audi A6 C6 4F Control Unit Air Module ECU Bosch 4F0959655G

PLN 85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8E0959433CH

Audi A4 B7 Comfort Convience Module Control Unit 8E0959433CH

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0937132F

Vw Golf 5 Audi A3 8P Seat Leon 1P1 Fuse Box Cover Trim Panel Housing 1K0937132F

PLN 61.95

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

If paid before 14:00

Part no. 8W0959595M

Audi A4 B9 A5 F5 Door Module Rear Right Left N/O/S Control Unit 8W0959595M

PLN 113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8N0906018CB

Audi TT 8N 1.8T BAM 224HP Quattro Engine Control Unit ECU 8N0906018CB Manual

PLN 607.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4G5971687BQ

Audi A6 C7 4G Rear Door Harness Wiring Loom Cable Left N/S 4G5971687BQ

PLN 80.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8U0907468G

Audi Q3 8U Gateway Interface Control Module Unit ECU 8U0907468G

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3Q0907338E

Audi S3 8V Front Headlight Lamp Range Control Module ECU 3Q0907338E

PLN 104.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 06M907309H-1

Audi RS5 F5 2.9 TFSI DECA Quattro 450HP Engine Unit ECU Kit 06M907309H Automatic

PLN 3,324.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5WB959107B

Audi Q2 GA Rear Boot Trunk Lid Tailgate Control Unit Module ECU 7367747

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0971228K

Audi A3 8V 1.5 TFSI DPCA Positive Battery Cable Lead Clamp Wire Loom 5Q0971228K

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4N0907063ME

Audi Q7 4M Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907063ME

PLN 759.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0959792A

Audi A5 8T Door Control Module Front Left N/S 8K0959792A

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0915181H

Audi A3 8P Negative Cable Battery Terminal Wiring Loom 1K0915181H

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1S0919275-PHB

Audi A3 8P PDC Parking Distance Control Sensor Module Unit ECU Phantom Black Z9Y

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8P0907279P

Audi A3 8P Gateway Interface Onboard Supply Control Module Unit ECU 8P0907279P

PLN 854.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0959793H

Audi A4 B8 A5 8T Door Module Control Front Unit ECU 8K0959793H

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0951253-1

Audi A3 8P Multi Use Control Module Relay 4 Pin Light Green Unit Set 4H0951253

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4M0959795N

Audi A4 B9 Door Module Rear Left Right N/O/S Control Unit Module ECU 4M0959795N

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0915181D

Audi A3 S3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181D

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0907530AL

Audi A3 8V VW Golf 5G Central Gateway Control Unit Module Relay ECU 5Q0907530AL

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0971250N

Audi A3 8V Volkswagen VW Golf Mk7 Negative Cable Ground Wire Harness 5Q0971250N

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 3Q0907530BB-1

Audi Q2 GA Central Gateway Control Unit Module Relay ECU 3Q0907530BB

PLN 379.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0035061J

Audi A8L 4H Head Unit Radio CD Player Navigation GPS 4H0035061J

PLN 1,329.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0971235A

Audi A4 B9 Negative Battery Terminal Cable Harness Wiring Loom 8W0971235A

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8X0959792H

Audi Q3 8U Door Module Front Door Left N/S Control Module 8X0959792H

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W1907063CC

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

PLN 759.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 04E907309AC-1

Audi A1 8X 1.4 TFSI CZCA 125HP Engine ECU Kit BCM Lock + Key 04E907309AC Manual

PLN 664.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8H0959985B

Audi Q7 4L Keyless Module ECU Door Lock Control Unit 8H0959985B

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4H0959107AC

Audi A8 4D Tailgate Lift Boot Lid Control Unit Module Trunk 4H0959107AC

PLN 180.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0907064CC

Audi A4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907064CC

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8W0906093D

Audi A4 B9 Fuel Pump Control Unit Module ECU 8W0906093D

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 03L903017E

Audi A4 B8 A5 8T Q5 8R Quattro Alternator Generator 2.0 TDI 03L903017

PLN 189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4FO903291

Audi A6 C6 2.0 TDI Relay Condenser 4FO903291

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

PLN 42.95

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. 4H0907801H

Parking Brake Module Audi A6 C7 A7 4G A8 4H Handbrake Control Unit 4H0907801H

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8J0951177

Audi TT 8J Interior Roof Alarm Motion Ultrasonic Sensor 8J0951177

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5LA907357H

Audi A6 C6 Front Lamp Headlight Range Control Module Unit ECU 5LA907357H

PLN 94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4E0907719

Audi A8 S8 D3 Alarm Module Tow Protection Signal Control Unit Block 4E0907719

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0971349CR

Skoda Octavia 1Z Audi A3 8P Alternator Wiring Harness Loom Cable 1K0971349CR

PLN 237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5WA959651

Audi A3 8Y VW Golf Mk8 Air Module Crash Impact Sensor 5WA959651

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0971104C

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

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0971693B

Audi A4 B8 Rear Door Card Harness Wiring Cable Loom Left Right N/O/S 8K0971693B

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0959393

Audi A3 8V Control Unit Central Door Locking Module ECU 5Q0959393

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 06E911021F

Audi A5 8T A6 C7 Engine Starter Motor 3.0 TFSI Petrol 06E911021F

PLN 123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8V0035398A

Audi A3 8V A-Pillar Speaker Tweeter Front Left Right N/O/S 8V0035398A

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 8X0907357C

Audi TT 8J Headlight Head Light Lamp Range Control Unit Module ECU 8X0907357C

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 5Q0937084AE

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

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 06H911021A

Audi A5 8T 2.0 TFSI Petrol Engine Starter Motor Actuator 06H911021A

PLN 75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0907719B

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

PLN 47.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4E0035225BQ

Audi A8 D3 Aerial Amplifier Antenna Receiver Signal Booster Unit 4E0035225BQ

PLN 142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8K0907247

Audi A6 4G Keyless Entry Amplifier Control Box Module Aerial Antenna 8K0907247

PLN 61.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8T0959795F

Audi A5 8F Window Lifter Module Control Unit Rear Left Right N/O/S 8T0959795F

PLN 42.95

Delivery - Tue, Jan 13

If paid before 14:00

Part no. 4N0035446

Audi A3 RS3 8V Aerial Antenna Amplifier Control Module Unit 4N0035446

PLN 474.95

Free delivery - Tue, Jan 13

If paid before 14:00

...

Showing 595-693 of 1552 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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