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. 04L907309K-1

Audi Q3 8U 2.0 TDI Quattro Engine ECU Kit 04L907309K Ignition + Key

PLN 664.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0907468J

Audi A4 B9 Gateway Control Unit Module ECU 8W0907468J

PLN 1,899.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A962243

Audi Q7 4M Rear Hatch Boot Lid Tailgate Opening Control Module Unit 80A962243

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 022971615B

Audi TT 8J 3.2 V6 BUB Ignition Wiring Harness Guide Trim 022971615B

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0907468M

Audi A5 8T Central Gateway Module ECU Control Unit Lear 8T0907468M

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0907441D

AUDI A4 B8 Reversing Camera Control Module Rear View Unit ECU 8T0907441D

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W6971029BF

Audi A5 F5 Front Door Wiring Harness Cable Driver's Side 8W6971029BF

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0959794B

Audi Q7 4L Door Control Module Electrical Unit ECU Rear Right O/S 4L0959794B

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907182H

Audi A8 D4 4H Front Seat Backrest Control Module Unit ECU 4H0907182H

PLN 170.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8T0959792G

Audi A4 B8 Front Door Lock System Module Right O/S Control Unit ECU 8T0959792B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907801E

AUDI A7 4G8 Electric Handbrake Control Module TRW 4H0907801E

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971036B

Audi RS4 B8 Door Wiring Harness Cable Loom Front Right O/S 8K0971036B

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907064BN

Audi A6 C7 Saloon CCM Comfort Control Module Onboard Unit ECU 4H0907064BN

PLN 218.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907637C

Yaw Sensor Audi A4 B8 A5 8T ESP Rotation Rate Unit Module 8K0907637C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0959655S

Audi A3 8P Air Module Control Sensor SRS System ECU Unit 8P0959655S

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0907440

Audi Q7 4L GPS Tracking Location Control Unit Module Locator 8K0907440

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L911024B

Audi A6 C7 2.0 TDI CGLC Diesel Starter Motor 03L911024B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907658

Audi A3 8V A5 8T A6 A7 Air Quality Sensor Control Unit 4H09076588

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 06K903023G

Audi TT FV Engine Alternator Generator Electric 14V 150A 2.0 TFSI 06K903023G

PLN 1,139.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3C0915336A

Audi A3 8P Battery Box Tray Covering Housing Trim Holder Bracket 3C0915336A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0907468G

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

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A907247

Audi SQ5 FY Line Keyless Entry Antenna Control Module 80A907247

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0959655P

Audi A4 B9 Air Module System Control Sensor ECU Unit 8W0959655P

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03F906070GN-2

Audi A1 8X 1.2 TFSI CBZA 86HP Engine Control ECU Kit 03F906070GN Manual

PLN 664.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06E971627Q

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627Q

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0035503E

Audi A4 B8 Transmitting Receiving Unit Road Toll System 4F0035503E

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V0907159

Audi A3 RS3 8V Impact Sound Actuator Body Control Unit Module ECU 8V0907159

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4L0959793B

Audi Q7 4L Front Door Module Driver Right O/S Side Control Unit 4L0959793B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A035223A

Audi Q5 FY Sound System Audio Amplifier Amp Unit Bang & Olufsen 80A035223A

PLN 1,899.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03G906018DN-2

Audi A3 8P 2.0 TDI 170HP BMN Engine Control Unit ECU 03G906018DN Automatic

PLN 161.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0971104J

Audi A8L 4H Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 4H0971104J

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P4035223B

Audi S3 8P Audio Sound BOSE Amplifier Stereo System Module 8P4035223B

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0915181J

Audi Q2 GA Negative Terminal HV Battery Cable Lead Ground Clamp 5Q0915181J

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959655B

Audi A6 C6 Air Module Control Unit ECU Module 4F0959655B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0906093D

Audi A4 B9 Fuel Pump Control Unit Module ECU 8W0906093D

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971687S

Audi A4 B8 Door Wiring Harness Loom Rear Left N/S Cabling 8K0971687S

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0035535

Audi A4 B7 Amplifier Bracket Aerial Antenna Module Mount Holder 8P0035535

PLN 47.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 5Q0937084CJ

Audi A3 8V 1.6 TDI DBKA BCM Body Control Module Unit ECU 5Q0937084CJ

PLN 189.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 8K0907801N

Audi A5 8T Electric Hand Parking Brake Control Unit ECU 8K0907801N

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018JR

Audi A4 B8 2.0 TDI CJCB 136HP Engine Control Unit Module ECU 03L906018JR Manual

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5WA959436J-1

Audi A3 RS3 8Y Keyless Go Module ECU Entry Control Unit 5WA959436J

PLN 113.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4H0907468AC

Audi A8L 4H Gateway Control Module Unit 4H0907468AC

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QA919283G

Audi A3 8V Park Parking Assist PDC Distance Control Unit Module 5QA919283G

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0971237S

Audi Q7 4M Q8 Mk1 Battery Negative Cable Wiring Earth Line 4M0971237S

PLN 161.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907412

Audi A8 D4 Ambient Lighting Control Module Unit ECU 4H0907412

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W9971104T

Audi A4 B9 Rear Bumper PDC Wiring Parking Sensor Loom Harness 8W9971104T

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 038907281B

Audi A6 C6 2.0 TDI Glow Plug Relay Unit Control Module 038907281B

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0862335A

Audi A4 B8 Bluetooth Interface Module Control Unit ECU 8T0862335A

PLN 218.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7N0941329

Audi A3 8V 30 TDI DGTE Ad Blue Reducer Dosage Control Module Unit ECU 7N0941329

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 057911022

Audi Q7 4M Engine Starter Motor Actuator Starter Valeo 3.0 TDI Diesel 057911022

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0959654

Audi A3 8P Steering Wheel Position Angle Sensor Control Unit Module 1K0959654

PLN 42.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 4L0959651

Audi A5 Q7 A6 Front Crash Impact Sensor Control Unit 4L0959651

PLN 142.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 443937105B-1

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 04E0919064

Audi A8 D3 Door Lightning Module Control Unit Front Rear 04E0919064

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907401-1

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

PLN 1,614.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W1907064BC

Audi A4 B9 Body Control Module BCM Comfort Control Unit Power Supply 8W1907064BC

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0941823E

Audi Q7 4M Positive Battery Terminal Distribution Box 4M0941823E

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0907530AM

Audi A3 8V VW Passat B8 Gateway Control Unit Module 5Q0907530AM

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104Q

Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104Q

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

PLN 42.95

Delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 3C0907503-1

Audi S7 4G8 Front Lamp Headlight Level Sensor 3C0907503

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8H0951178

Audi A4 B7 Cabrio Alarm Signal Body Control Sensor Module Unit 8H0951178

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 0AM911023N

Audi A3 8V 1.4 TFSI Petrol Starter Motor Engine Actuator Unit 0AM911023N

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0906093N

Audi A4 S4 B9 Petrol Fuel Pump Control Unit Module ECU 4M0906093N

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0907468AB

Audi A4 B8 2.0 TDI CAGA Gateway Interface Control Module Unit ECU 8T0907468H

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959793D

Audi A1 8X Driver Side Door Module Front Control Unit Module ECU 8X0959793D

PLN 61.95

Free delivery - Mon, Nov 24

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 - Mon, Nov 24

If paid before 14:00

Part no. 5Q0971250Q

Audi A3 S3 8V Negative Battery Terminal Earth Cable Lead Wiring 5Q0971250Q

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 80A907159

Audi SQ5 FY Control Unit Module Active Sound Design 80A907159

PLN 327.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959663B

Audi A5 8T Voltage Converter Stabilizer Control Module Unit ECU 8K0959663B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 3D0951253A

VW Volkswagen Audi Seat Skoda Relay Black 5 Pins 12V 50A Set 433 3D0951253A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QA919283

Audi A3 S3 8V Parking Assist PDC Control Module 5QA919283

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0906131A

Audi A3 8P Engine Unit Bracket ECU Module Holder Bracket Mount 8P0906131A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0941824AK

Audi A4 B9 A5 F5 Q5 FY Fuse Box Battery Terminal 8W0941824AK

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. RHD-8T2035186Q

Audi S3 8V Multimedia MMI Radio Stereo Audio Head Unit CD Player 8T2035186Q

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971104C

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0907159C

Audi A1 8X Impact Sound Actuator Control Module 8X0907159C

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959793J

Audi A6 C7 Door Module Control Unit ECU Front Left N/S 4G8959793J

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906022DH

Audi TT 8J 2.0 TDI 170HP CBBB Quattro Engine Module Unit ECU 03L906022DH Manual

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W9971104M

Audi A4 B9 Rear Bumper PDC Parking Sensor Harness Wiring Loom Cable 8W9971104M

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959392B

Audi A3 S3 8V Door Control Module Front Passenger Side Left N/S 5Q0959392B

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8Y0971693D

Audi S3 8Y Sportback Rear Door Wiring Harness Loom Left Right N/O/S 8Y0971693D

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906022FL

Audi A6 C6 3.0 TDI 233HP Diesel Engine Control Unit ECU Kit Module 03L906022FL

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959592B

Audi A3 8V Door Module Control Unit Front Passenger Side 5Q0959592B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G0907637H

Audi A6 C7 ESP Yaw Rate Module Control Unit Sensor ECU 4G0907637H

PLN 284.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0035223L

Audi A4 B8 A5 8T Audio Amplifier Sound Booster Control Unit Module 8T0035223L

PLN 807.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0941828H

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

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 3Q0907338P

Audi Q2 GA Headlight Light Headlamp Lamp Control Module Unit ECU 3Q0907338P

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0937555

Audi A8L 4H Fuse Box Relay Chamber Lower Cover Lid Housing 4H0937555

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8Y0035465

Audi A3 8Y A4 B9 Q5 FY Harman Speaker Amplifier Booster Sound System 8Y0035465

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7L0937576B

Audi Q7 4L Fuse Box Trim Cover Panel Electrical Unit Housing 7L0937576B

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907364B

Audi Q5 8R A5 8T A4 B8 Active Suspension Module Damping Control Unit 8R0907364B

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

...

Showing 100-198 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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