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. 5Q0919275B-BLK

Audi Q2 GA Front Parking Sensor Assist Control Module Black 5Q0919275B

PLN 61.95

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. 5M0907357G

Audi Q3 8U Headlight Range Control Unit Module ECU 5M0907357G

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959754H

Audi A5 8T Remote Button Smart Key Fob Unit 8K0959754H

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0919813E

Audi A4 B8 Chip Card Reader for Road Toll ETC Japan Module Unit 4F0919813E

PLN 113.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4F0907247A

Audi Q7 4L Keyless Entry Amplifier Control Box Module Aerial Antenna 4F0907247A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0906121D

Audi Q3 8U 2.0 TDI CFGC Fuel Sender Pump Control Module Unit ECU 5Q0906121D

PLN 351.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0971349CD

Audi TT 8J Alternator Main Cable Wiring Harness Loom 8J0971349CD

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F7910401L-1

Audi A6 C6 2.7 TDI CANC Quattro 190HP Engine Control Unit ECU Kit 4F7910401L

PLN 1,187.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959795F

Audi Q5 8R Rear Door Control Module Unit ECU Left Right N/O/S 8K0959795F

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K1907401K

Audi A4 B8 8K A5 8T 2.7 TDI 190HP CGKA Engine Control ECU 8K1907401K Automatic

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971688S

Audi A4 B8 Door Harness Loom Cable Wiring Rear 8K0971688S

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959792J

Audi A4 B8 Door Module Front Left N/S Control Unit Module ECU 8K0959792J

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0035192E

Audi A4 B9 Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 8W0035192E

PLN 1,139.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0951177

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

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906019AG-1

Audi A6 C6 2.0 TDI CAHA 170HP Engine ECU Kit 03L906019AG Ignition + Key Manual

PLN 854.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5K0962132A

Audi Q3 F3 Keyless Entry Amplifier Control Box Module Aerial Antenna 5K0962132A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 02M911022F

Audi Q2 GA 35 TFSI DXDB Petrol Starter Motor Manual 02M911022F

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03G903016F

Audi A4 B8 2.0 TDI Alternator Generator 150A Diesel Engine Unit 03G903016F

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0915181

Audi A4 B8 A5 8T TT Mk2 Negative Battery Terminal Cable Lead 8X0915181

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959792R

Audi Q5 8R Door Module Control Unit Front Passenger Side 8K0959792R

PLN 75.95

Free 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. 8K0035474B

Audi A4 B8 A5 8T Connector AUX Adapter Port Socket Plug 8K0035474B

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1J0906381B

Audi TT 8N Fuse Box Relay Control Unit Module 1J0906381B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03G906056S

Audi A3 8P 1.9 TDI BLS 105HP Engine Control Module Unit ECU 03G906056S Manual

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959651B

Audi A3 8V Front Impact Sensor Crash Detection Module Unit 5Q0959651B

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0962239A

Audi A8 D4 Rear Hatch Boot Lid Tailgate Opening Cable Wiring Line 4H0962239A

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0915181E

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181E

PLN 42.95

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. 8P0907357F

Audi S4 B7 Headlight Head Light Lamp Range Control Unit Module ECU 8P0907357F

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959592F

Door Module Audi A3 8V Volkswagen Golf 7 Control ECU Front Left N/S 5Q0959592F

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0820047

Audi TT FV 8S A/C Air Condition Climate Control Module Unit ECU 8S0820047

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 02M911024Q

Volkswagen Golf VI Passat B6 Tiguan Starter Motor Diesel Engine 02M911024Q

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907472

Audi A4 B8 Headlight Headlamp LED Module Control Unit 8K0907472

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 059903143K

Audi A4 B7 A6 C6 Alternator Bracket Pulley Mount Holder 2.7 3.0 TDI 059903143K

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 07K907309L

Audi RS3 8Y 2.5 TFSI Quattro 400HP DNWC Engine Unit ECU 07K907309L Automatic

PLN 3,799.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0937517

Audi A8L 4H Fuse Relay Battery Junction Box Housing 4H0937517

PLN 284.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8K0959794A

Audi A4 B8 Door Module Rear Right O/S Control Unit Module ECU 8K0959794A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V4971030AD

Audi A3 S3 8V Front Door Wiring Harness Loom Cable Passenger Side 8V4971030AD

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959651

Audi A5 8T A4 B8 Crash Impact Sensor Control Unit 8K0959651

PLN 70.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0959593N

Audi A4 B9 Front Door Module Control Unit ECU Driver's Side 8W0959593N

PLN 180.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0971349GA

Volkswagen VW Golf Mk6 1.6 TDI Alternator Cable Wiring Harness Loom 1K0971349GA

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7P0907652

Yaw Sensor Audi Q7 4L Rotation Rate Unit Module 7P0907652

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0910110E

Audi S6 C6 6-Disc CD Changer Magazine Head Unit MMI 4E0910110E

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0971693A

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693A

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0035456C

Audi A4 B7 Telephone Aerial Antenna Signal Amplifier Module 8E0035456C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0959643B

Audi A4 B7 Crash Impact Airbag Sensor Unit Module 8E0959643B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0959595H

Audi A5 F5 Rear Door Control Module Unit ECU Left Right N/O/S 8W0959595H

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0963553D

Volkswagen Skoda Seat Audi Seat Pressure Sensor Front Passenger Side 8S0963553D

PLN 66.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0953549A

Audi S6 C6 Steering Column Wiper Switch Stalk Cruize Control 4F0953549A

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06M907309D-1

Audi SQ5 FY 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit Gateway + Key 06M907309D

PLN 2,374.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907468C

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03C903024F

Alternator Audi A3 8P VW Passat B7 Engine Generator 1.4 TSI 03C903024F

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0907590D

Audi S5 F5 Blind Spot Radar Distance Control Module Left N/S Slave 4M0907590D

PLN 664.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A907247A

Audi Q5 FY Keyless Entry Amplifier Control Box Module Aerial Antenna 80A907247A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959795F

Audi A7 4G Rear Door Control Module Unit ECU Left Right N/O/S 4G8959795H

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06N971627B

Audi A3 8Y Engine Injector Module Wiring Harness Cable 2.0 TFSI 06N971627B

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QS959655A

Audi A3 S3 8Y Air Module Crash Impact Sensor Unit Control ECU 5QS959655A

PLN 1,044.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6R0915181E

Audi A1 8X Battery Cable Loom Harness Wiring Negative Terminal 6R0915181E

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0971226

Audi TT 8J Negative Battery Cable Lead 8J0971226

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959793D

Audi A4 B8 A5 S5 8T Door Module Control Unit Front Left N/S 8K0959793D

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907064FB

Audi A8 D4 BCM Module Body Control Unit Convenience ECU 4H0907064FB

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971095E

Audi A4 B8 Front Bumper PDC Wiring Park Assist Sensor Harness 8K0971095E

PLN 294.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0035225J

Audi A1 8X Antenna Booster Amplifier Upper Rear Right O/S 8X0035225J

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959655H

Audi A7 4G8 Air Module Control Unit ECU SRS Module Unit 4H0959655H

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 06A903143P

Audi TT 8N Alternator Bracket Mount Holder 06A903143P

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QS915181

Audi A3 S3 8Y Battery Negative Terminal Cable Wire 5QS915181

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0907530AJ

Audi RS3 8V Gateway Control Module GCM Unit ECU 5Q0907530AJ

PLN 142.95

Free 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. 7M0951253A

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 7M0951253A

PLN 42.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4H0907182G

Audi A8 D4 4H Multicontour Seat Module Control Unit Left Right N/O/S 4H0907182G

PLN 170.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971845A

AUDI A5 8T 2.0 TDI CGLC Fuse Relay Box Power Distribution 8K0971845A

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959792D

Audi A5 8T Front Door Control Module Unit Left N/S 8T0959792D

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959792J

Audi A7 4G8 Door Control Module Front Passenger Side 4G8959792J

PLN 42.95

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. 4G0035083

Stereo DAB Radio Audi A4 B8 Q5 8R CD Player Radio Receiver Head Unit 4G0035083

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0971142C

Audi A8 D4 Door Card Wiring Loom Cable Harness Rear Right O/S 4H0971142C

PLN 94.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 5QA919283A

Audi A3 S3 8V VW Golf 7 Seat Leon 3 Parking Assist PDC Control Module 5QA919283A

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G0907401F-1

Audi A7 4G 3.0 TDI CDUC Quattro Engine ECU Kit BCM + Ignition + Key 04L907445F

PLN 1,662.95

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. 8V4971693F

Audi A3 8V Rear Left Right N/O/S Door Card Wiring Loom Harness 8V4971693

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3G0962243C

Volkswagen Seat Skoda Audi Tailgate Module Controller 3G0962243C

PLN 142.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 03L906022NN

Audi A4 B8 2.0 TDI 143HP CAGA Diesel Engine Control Unit ECU Module 03L906022NN

PLN 427.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G0907697J

Audi A7 4G A6 C7 Daytime Running Lights DRL LED Headlight Module Unit 4G0907697J

PLN 256.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 02M911023P

Audi Volkswagen Seat Skoda 2.0 TDI Diesel Starter Motor Engine Bosch 02M911023P

PLN 170.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4G8971085DP

AUDI A6 C7 A7 FY Sensor Harness Installation PDC Radar 4G8971085DP

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P3035223B

Audi S3 8P Audio Sound System Amplifier Bose 290328

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QA919294B

Audi A3 8V VW Volkswagen Golf VII PDC Park Assist Control Module Unit 5QA919294B

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0971845A-1

Audi A6 S6 C6 Body Comfort Module Convenience Control Unit 4F0907289J

PLN 94.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8T0959792K

Audi A5 S5 8T Door Module Control Unit Front Passenger Side 8T0959792K

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0915519

Volkswagen Polo Touareg Audi A4 A6 A7 A8 Battery Overload Protection 4F0915519

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

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Showing 1-99 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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