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. 8W0906093F

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

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0035652E

Audi A6 C6 MMI Multimedia Sat Nav Navigation Control Head Unit 4E0035652E

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0971767

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0035192SX

Audi A3 S3 8P Radio Media GPS Sat Audi Navigation Plus Unit 8P0035192QX

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0971104S

Audi A8 D4 Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 4H0971104S

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907064FF

Audi A4 S4 B8 Body Control Comfort Unit Module BCM2 Unit ECU 8K0907064FF

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0915181A

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K5907357

Audi A4 B8 Headlight Headlamp Range Control Unit Module 8K5907357

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959793A

AUDI A7 4G8 Door Control Module Front Left N/S Driver Side 4G8959793A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104AC

Audi RS4 A4 B8 8K Parking Sensors Rear Bumper Wiring Loom 8K0971104AC

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0035785

Audi A3 8P MMI Multimedia Interface Unit Module Control ECU 8P0035785

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907658C

Audi S3 8Y A5 F5 Q5 FY A8L 4H Air Quality Sensor Unit 4H0907658C

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018LB

Audi A6 C7 2.0 TDI CGLC 177HP Engine Control Unit ECU 03L906018LA Automatic

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F1971687AL

Audi A6 C6 Rear Left N/S Door Harness Cable Loom 4F1971687AL

PLN 222.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0951605C

VW Volkswagen Golf Audi Seat Alarm System Siren Anti-Theft Signal 1K0951605C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0941817B

Audi A6 A8 D4 Q7 4M CAN Bus Jumper Contact Bridge Connector Plug 4E0941817B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V7035225B

Audi A3 8V Antenna Amplifier Rear Right O/S 8V7035225B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0959655K

Audi A8 4E S8 D3 SRS Bag Control Air Module Unit Bosch 4E0959655K

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0907361C

Audi A3 8V Fuse Box Control Module Relay Box 5Q0907361C

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0035670R

Audi A8L 4H Multimedia Radio Sat Nav CD Player SD SIM Head Unit 4H0035670R

PLN 1,899.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0035785D

Audi A4 B8 A5 8T MMI Multimedia Interface Control Unit Module 4E0035785D

PLN 422.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A1635400382

Mercedes ML W163 Fuse Relay Box ECU Cover Trim A1635400382

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0035670

Audi Q7 4L Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 4L0035670

PLN 1,424.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971228AH

Audi A5 8T Positive Battery Lead Terminal Cable Wiring 2.0 TFSI 8K0971228AH

PLN 275.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0035225J

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

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959760D

Audi A8 4D Front Seat Memory Adjustment Module Unit Right O/S 4H0959760D

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8Y4971104BK

Audi S3 8Y Rear Bumper Wiring Harness Cable Loom 8Y4971104BK

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959793G

Audi A4 B8 Door Module Front Left N/S Control Unit ECU 8T0959793G

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907357A

Audi A7 4G8 Headlight Head Light Lamp Range Control Unit Module ECU 4H0907357A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018JM-1

Audi Q5 8R 2.0 TDI CGLC Quattro 177HP Engine Control ECU Kit 03L906018JM Manual

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0915181

Audi A4 RS4 B8 Battery Terminal Negative Cable Loom Harness Wiring 8T0915181

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0907280A

Audi A6 C6 On Board Onboard Supply Module Control Unit ECU 4F0907280A

PLN 66.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907401J-1

Audi Q5 8R 3.0 TDI CCWA 240HP Quattro Engine ECU Kit Ignition + Key 8R0907401J

PLN 1,187.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0907063CF

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W0907063CF

PLN 474.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8K5035570

Audi A4 B8 Aerial Antenna Disturbance Suppressor 8K5035570

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A907777N

Audi Q5 FY Active Suspension Module Damping Chassis Control Unit EFP 80A907777N

PLN 1,139.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 079903021JX

Audi S8 D3 S6 C6 Alternator Water Cooled 190A 14V 5.2 FSI V10 079903021J

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 04L906021CK

Audi Q5 8R 2.0 TDI CNHA Quattro 190HP Engine Unit ECU Kit 04L906021CK Automatic

PLN 1,899.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959792K

Audi Q3 8U Front Door Module Control Unit ECU Passenger Side 8X0959792H

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907551-1

Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine ECU Kit 8K0907551 Automatic

PLN 1,044.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0907290

Audi Q7 4L Gateway Convenience Module Unit Control ECU 4L0907290

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0035225L

Audi A8 D4 4H Aerial Antenna Amplifier AMP Booster Module 4H0035225L

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959792E

Audi A6 C6 Front Passenger Side Door Left N/S Module Unit Control ECU 4F0959792E

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L2035670J

Audi Q7 4L Head Unit Radio Player Navigation Control Module Alpine 4L2035670J

PLN 1,899.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959793Q

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793Q

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0907637B

Audi A6 C6 Yaw Module Rotation Rate Acceleration Sensor 8E0907637B

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0907468T

Audi A4 B8 A5 8T Gateway Control Unit Module ECU 8T0907468T

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959595K

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595K

PLN 94.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8X0959673

Audi A1 8X Windscreen Heating Control Switch 8X0959673

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959595E

Audi A3 8V Door Control Module Unit ECU Rear Left Right N/O/S 5Q0959595E

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 059903018E

Audi Q7 4L Diesel Alternator Generator Engine Electrical Unit 059903018E

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907468N

Audi A5 8T Gateway Control Module Unit ECU 8R0907468N

PLN 93.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959793S

Audi A4 B8 Front Door Control Module Unit ECU 8K0959793S

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R2035666L

Audi A5 8T Harman Multimedia Sat Navi Radio CD Player Head Unit 8R2035666L

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0971687D

Audi Q3 8U Door Loom Wiring Harness Cable Rear Left Right N/O/S 8U0971687D

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0959595N

Audi Q7 4M Rear Door Control Module Unit ECU Left Right N/O/S 4M0959595N

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03C971612BR

Audi A1 8X 1.4 TSI Engine Wiring Loom Harnes 03C971612BR

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959793T

Audi Q7 4L Door Module Front Driver's Side Control Unit ECU 4F0959793T

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0971687C

Audi A1 8X Rear Door Harness Left N/S Wiring Loom Cable 8X0971687C

PLN 180.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959754

Audi A5 8T Remote Radio Alarm Key Button Control Unit Module 868 MHZ 8T0959754

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959792H

Door Module Audi A5 8T A4 B8 Control Front Left N/S Unit 8T0959792H

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T8035225C

Audi A5 8T Audio Radio Aerial Amplifier Control Unit 8T8035225C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 02E911023T

Seat Leon 5F Engine Starter Motor 2.0 TDI Diesel 02E911023T

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4B0959643E

Audi A3 8P Crash Impact Airbag Sensor Unit Module Air Bag 4B0959643E

PLN 56.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0907063AB

Audi A1 8X BCM Body Control Module Power Supply Unit 8X0907063AB

PLN 161.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L911021E

Audi A4 B8 Starter Motor Engine Motor Actuator Diesel Bosch 03L911021E

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L903023K-1

Audi A3 8P A4 A5 B8 Q5 Alternator Generator Diesel Electrical Unit 03L903023K

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907468L

Audi A5 8F Gateway Control Unit Module ECU 8R0907468L

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0907064EC

Audi A5 F5 BCM Body Comfort Module Onboard Control Unit ECU 8W0907064EC

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959792B

Audi A1 8X Door Module Control Unit Controller Front Passenger's Side 8X0959792B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0971365F

Audi TT FV Driver's Seat Cable Seat Belt Warning Wiring Loom Harness 8S0971365F

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8Y0035042C

Audi S3 8Y Body Control Comfort Module ECU Unit Bluetooth 8Y0035042C

PLN 4,749.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018PH

Audi Q3 8U 2.0 TDI CFGC 177HP Quattro Engine Control Unit ECU 03L906018PH

PLN 712.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 83F971104F

Audi Q3 F3 Rear Bumper PDC Wiring Loom Cabling Parking Sensor 83F971104F

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0907280E

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

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959792D

AUDI S5 8T Door Control Module ECU Front Left N/S 8K0959792D

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H4907357B

Audi A8 D4 Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357B

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6R0971349BK

Audi A1 8X 1.4 TFSI CAXA Alternator Wiring Harness Cable Loom 6R0971349BK

PLN 123.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8T0919611-1

Audi A4 B8 Head Unit Media Player Controller Knob Switch Panel 8T0919611

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 079903805AF

Audi A5 S5 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805AF

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0915181N

Audi A1 8X Negative Battery Terminal Cable Wiring 8K0915181N

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0907159J

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

PLN 170.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06F903023C

Audi Volkswagen Seat Skoda Engine Alternator Generator 06F903023C

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 141951253B

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 141951253B

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. 5Q0907530AL

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0941824A

Audi A1 A4 A6 A7 A8 Fuse Box Connector Socket Module Unit 8K0941824A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907539

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0907530G

Audi A3 8P Gateway Module Diagnostic Interface Control Unit ECU 1K0907530G

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 2100493N

Audi A5 8T Seat Cable Front Left Right N/O/S Wiring Loom Harness 2100493N

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0998572A

Audi Q3 8U Headlight Module LED Headlamp Control Unit 8U0998572A

PLN 199.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1J0971235S

Audi TT 8N HV Battery Negative Earth Terminal Harness Wiring Cable 1J0971235S

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0035456A-1

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959795M

Audi A6 C6 Rear Door Left Right N/O/S Module Unit Control ECU 4F0959795M

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

...

Showing 199-297 of 1408 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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