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. 5Q0906121M

Audi Q3 8U 2.0 TDI CUWA Fuel Pump Relay Control Unit Module ECU 5Q0906121M

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W6971035AN

Audi A5 F5 Front Door Wiring Harness Cable Driver's Side 8W6971035R

PLN 218.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959792A

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0919805

Audi A4 B8 Smart Card Reader Smart Card System TV 4F0919805

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 059971627D

Audi A6 C7 High Pressure Pump Fuel Line Electrical Wiring Harness 059971627D

PLN 94.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4H0959591A

Audi A8 D4 4H Sunroof Wind Deflector Module Control Unit 4H0959591A

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0915181A

Audi A5 F5 HV Battery Negative Cable Terminal 8W0915181A

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959795A

Audi A7 4G8 Door Control Module Electrical Unit ECU Rear Right O/S 4G8959795A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0035225AJ

Audi Q7 4L Radio Aerial Antenna Amplifier AM/FM 4L0035225AJ

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V4971687K

Audi A3 RS3 8V 5Dr Door Harness Loom Wiring Rear Left Right N/O/S 8V4971687K

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G0907468AB

Audi A6 C7 Gateway Module Control Unit ECU 4G0907468AB

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0971250AL

Audi A3 8P Negative Battery Terminal Cable Wiring Battery Wire 1K0971250AL

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 3C0919275S-CGR

Audi TT 8J PDC Parking Distance Sensor Control Condor Grey - Y7E 3C0919275S

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0919614B

Audi Q7 4L Navigation Multimedia Control Panel Knob Unit 4L0919614B

PLN 2,089.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K9035382B-1

Audi RS4 B8 Boot Trunk Speaker Spare Wheel Holder Audio Kicker 8K9035382B

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907063BA

Audi A6 C7 Onboard Supply BCM Body Control Module Unit ECU 4H0907063BA

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907705K

Audi A8L 4H Steering Angle Steering Wheel Column Control Module ECU 4H0907705K

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0971035A

Audi A5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971035A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959795C

Audi Q3 8U Door Module Rear Left Door Control Unit 8X0959795C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0907159B

Audi TT 8J Alarm Signal Body Sound Impact Control Module Unit 8J0907159B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104AE

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104AE

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 6C0907359

Audi A4 B8 Air Suspension Module Regulation Control Unit 6C0907359

PLN 47.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0915181F

Audi A8L 4H Negative Battery Cable Lead 4H0915181F

PLN 351.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0907357F

Audi A6 C6 Headlight Head Light Lamp Range Control Unit Module ECU 4F0907357F

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3Q0907338

Audi S3 8V Front Headlight Lamp Range Control Module ECU 3Q0907338

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0035613

Audi A3 8P Bluetooth Module Multimedia Control Unit Cover Unit 8P0035613

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06M911021A

Audi SQ5 FY Starter Motor Engine Diesel Bosch 06M911021A

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 89393773

Audi Q7 4L Headlight Module Ballast Control Unit 89393773

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959793R

Audi A6 C6 Door Module Front Driver's Side Control Unit ECU 4F0959793R

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 04L911021

Audi A5 8T 2.0 TDI CNHA Diesel Engine Motor Starter 04L911021

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0907280B

Audi A8 4E S8 D3 Power Supply Control Module Unit ECU 4E0907280B

PLN 42.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8J0915459

Audi A4 B8 A5 8T TT MK2 Positive Battery Terminal Cable Overload Fuse 8J0915459

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K9035225A

Antenna Amplifier Audi A4 S4 B8 Radio Aerial AM/FM 8K9035225A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 3Q0907338E

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

PLN 104.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0906093G

Audi A4 B7 Fuel Pump Sender Control Relay Module Unit ECU 4F0906093G

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V5035225

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0941824

Audi S6 C6 Wirie Cable Fuse Box Holder Support 4F0941824

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0971230HH

Audi S3 8V Starter Alternator Wiring Harness 5Q0971230HH

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W1959595

Audi Q5 FY Rear Door Control Module Unit Left Right N/O/S 8W1959595

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0971237A

Audi TT 8J Starter Motor Negative Battery Wiring Harness Cable 8J0971237A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0910441C

Audi Q7 4L Rear Reversing Camera Module View Control Unit ECU 4L0910441C

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018KP

Audi TT 8J CFGB 2.0 TDI Quattro 170HP Engine ECU Kit 03L906018KP Automatic

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P4971693P

Audi A3 8P Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8P4971693P

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0959651

Audi A3 8P Air Module Crash Impact Sensor 8J0959651

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0937517A

Audi A4 B8 A5 8T Battery Postive Terminal Distribution Power Board 8K0937517A

PLN 42.95

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. 06E903024L

Audi A4 S4 B9 A5 A5 F5 3.0 Petrol Alternator Generator 14V 150A 06E903024L

PLN 854.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0035072A

Audi TT FV Dashboard Sat Nav Drive Unit MMI Multimedia Infortaiment 8S0035072A

PLN 1,709.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0907637A

Audi A6 C6 Yaw ESP Rate Sensor Module Unit Control ECU 4F0907637A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959592D

Door Module Audi A3 8V VW Golf 7 Seat Leon 3 Front Right O/S 5Q0959592D

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06L903027

Audi Q5 FY Alternator Generator Valeo 2.0 TFSI 06L903027

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0951223

Audi A6 C7 Single Horn Alarm Siren High Tone Control Unit Module 4H0951223

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959792Q

Audi A5 8T Front Door Control Module Passenger Side 8T0959792Q

PLN 42.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4H0911075B

Audi A8L 4H Power Positive Distribution Junction Jumper Box Housing 4H0911075B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

PLN 432.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959793C

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V5971687Q

Audi A3 8V Door Wiring Harness Loom Rear Left Right N/O/S 8V5971687Q

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959393

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

PLN 123.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8P3907357B

Audi S3 8P Xenon Headlight Range Control Module Unit ECU 8P3907357B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959793K

Audi A1 8X Door Module Front Right O/S Driver's Side Control Unit ECU 8X0959793K

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907064DC

Body Control Module Audi A4 B8 A5 8T BCM Comfort Control Unit 8K0907064DC

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0959651A

Audi A4 B7 Front Crash Impact Air Module Sensor Unit Module 8E0959651A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959792F

Audi A1 8X Front Door Control Module Unit Passenger Side 8X0959792F

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 059911021G

Motor Starter Audi A7 4G Q5 8R 3.0TDI Diesel Engine Starter Unit 059911021G

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0035223AH

Audi A4 B8 8K A5 8T Amplifier Audio Sound Booster Module 8T0035223

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959592E

Audi A3 8V Front Door Module Control Unit Module Right O/S ECU 5Q0959592E

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 420919275-1

Rear Bumper PDC Audi A5 Sensor Parking Distance Control 420919275 1706091849

PLN 75.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8D0951253A

Audi A6 C6 Multi Use Relay Unit Module 4 Pins 373 8D0951253A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0959655B

Audi Q3 8U Air Module Control Unit SRS System ECU 8U0959655B

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0035223AB

Audi A4 B8 8K A5 8T Sound System Audio Amplifier Amp Unit 8T0035223AB

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0971845C

Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0959655P

Audi A3 8P Air Module Control Unit ECU Module 8P0959655P

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0907063CG

Audi Q5 FY 2.0 TFSI DAXB Petrol Supply Body Control Module Unit 8W0907063CG

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3Q0907530AC-1

Audi Q2 GA Gateway Diagnostics Interface Control Module 3Q0907530AC

PLN 75.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104F

Audi A4 B8 Rear Wiring Loom PDC Harness Parking Sensor 8K0971104F

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. EXHAUST-FLAP-CONTROL

Audi A3 8V 1.6 TDI CLHA Drive Exhaust Flap Control Module Unit Actuator

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W9971104A

Audi S4 B9 Wiring Loom Set PDC Rear Complete Harness Parking Sensor 8W9971104A

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0906093G

Audi A1 8X VW Seat Skoda Fuel Pump Control Unit Module 1K0906093G

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907468AF

Audi A8 D4 Central Diagnostic Getaway PKO Control Unit Module ECU 4H0907468AF

PLN 474.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4F0959792T

Audi A6 C6 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0919475A

BCM Module Audi Q7 4L A6 C7 A8 4H Body Control Unit ECU 4L0919475A

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0035570

Audi A6 C6 Interference Disturbance Suppressor Filter Module 8T0035570

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0910552G

Audi S8 D3 5.2 FSI 450HP BSM Quattro Engine Unit ECU 4E0910552G Automatic

PLN 1,424.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8S0915181C

Audi Q5 FY A5 Negative Battery Terminal Cable Wiring 8S0915181C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959595B

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595B

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W8959107D

Audi A5 F5 Rear Hatch Tailgate Boot Lid Control Module Unit ECU 8W8959107D

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959792G

Audi A6 C7 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959393K

Audi Q2 GA A3 8V Front Door Control Module Unit Right O/S 5Q0959393K

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8Y0035465A

Audi Q2 GA Harman Speaker Amplifier Booster Sound System 8Y0035465A

PLN 617.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959795E

Audi A8 4H Rear Door Module Control Unit Left Right N/O/S 4H0959795E

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G0971845A

Audi A6 C7 Fuse Relay Box Sam Control Module 4G0971845A

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

...

Showing 496-594 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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