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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Part no. 8W1959593

Audi Q5 FY Front Door Control Module Unit Right O/S Side 8W1959593

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8971365M

Audi A7 4G Seat Cable Front Left Right N/O/S Wiring Loom Harness 4G8971365

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959651A

Audi A1 A6 A7 Impact Crash Control Sensor Module ECU 4H0959651A

PLN 85.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0971104A

Audi A4 B9 Rear Bumper Cable PDC Parking Sensor Wiring Harness Loom 8W0971104A

PLN 161.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7H0907652A

Audi Q7 4L Yaw Rate Speed Sensor Module 7H0907652A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0971228N

Audi A3 VW Golf Caddy Battery Lead Positive Cable Plus Pole Wiring 1K0971228N

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0035507

Audi A3 8V A4 B9 Telephone Antenna Amplifier Module Unit Booster 4M0035507

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8J0035456

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

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0937084DC

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

PLN 132.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907601E

Audi S3 8Y 2.0 TFSI DNFF Petrol Engine Sound Noise Actuator 4H0907601E

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0959794E

Audi A6 C6 Rear Door Right O/S Module Unit Control ECU 4F0959794E

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0959655G

Audi A4 B8 Air Module ECU Control Unit Crash Sensor 8K0959655G

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959795N

Audi A4 B8 Rear Door Control Module Unit Left Right N/O/S 8T0959795N

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. A2128204185

Mercedes W204 W212 Door Module Control Unit Module Rear Right O/S A2128204185

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959793F

Audi A1 8X Front Door Module Unit Control Driver's Side Right O/S 8X0959793F

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4N0035446

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

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959792H

Audi A8 D4 4H Front Door Control Module Unit ECU Passenger Side 4H0959792H

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1S0919275D-MRE

Audi A5 8T PDC Parking Distance Control Sensor 1S0919275D Misano Red Pearl - Z3M

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0971663A

Audi A8 D4 Front Door Wiring Harness Loom Cable Left N/S 4H0971663A

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0907279P

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

PLN 854.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0881073B

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

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06L971627M

Audi Audi Q5 FY 2.0 TFSI QUATTRO Petrol Fuel Injectors Wiring Harness 06L971627M

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959795H

Audi A4 B8 Door Control Module Unit ECU Rear Left Right N/O/S 8T0959795H

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 1J0973332A

Audi RS4 B8 Cable Loom Wiring Plug Socket 2 Pins 1J0973332A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4E0035729

Audi A6 C6 Bluetooth Interface MMI Multimedia Control Module ECU Unit 4E0035729

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1S0919275-DGR

Audi A5 8T Parking Sensor Control Module Daytona Grey Metallic - Z7S 1S0919275

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0907468R

Audi A4 B8 Gateway Control Unit Module ECU 8T0907468R

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 05L907309

Audi A4 B9 A5 F5 30 TDI DTNB 136HP Engine Control Unit ECU 05L907309 Automatic

PLN 1,092.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7PP941572AB

Audi A4 B9 Volkswagen Tiguan 1T Headlight Ballast Control Module 7PP941572AB

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0959651

Front Crash Impact Audi A4 B9 A5 F5 Air Module Sensor Unit 4M0959651

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 06L903018H

Audi A4 B9 A5 F5 Alternator Generator Valeo 2.0 TFSI DDWA 06L903018H

PLN 522.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 81A035466B

Audi A3 8V Bang Olufsen Audio AMP Amplifier Module Control Unit ECU 81A035466B

PLN 1,614.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K1907115M

Audi A4 B8 A5 8T 1.8 TFSI CDHB 160HP Engine Control ECU 8K1907115M Automatic

PLN 465.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06E971627M

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627M

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 06H971627

Audi A5 8T 2.0 TFSI Petrol Fuel Injectors Wiring Cable Harness 06H971627

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0971228B

Audi A5 8T Battery Starter Alternator Harness Wiring Cable 8K0971228B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018JR-1

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

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P4963553

Audi A3 8P Front Seat Occupation Sensor Left Right N/O/S 8P4963553

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 04L906021BQ

Audi A4 B8 Engine Control Unit Module ECU 2.0 TDI CNHC 163HP 04L906021BQ

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959393B

Audi A3 8V Front Door Control Module Unit Right O/S 5Q0959393B

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 02E911022H

Audi S3 8Y 2.0 TFSI Starter Motor Engine Petrol 02E911022H

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0035110A

Audi A6 C6 CD Player Changer Multimedia Module Control Unit 4F0035110A

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0959593D

Audi TT FV A3 8V Door Module Control Unit Front Right O/S Side ECU 5Q0959593D

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L903023K

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

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907508

Audi RS6 C7 Acceleration Engine Sensor Module Control Unit ECU 4H0907508

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8D0951253-1

Audi A4 B6 B7 B8 Q7 4L A6 C7 A8 D4 Multi Use Relay Unit Module 4 Pins 8D0951253

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0907468BA

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468AQ

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5WA980653C

Audi A3 S3 RS3 8Y Front Camera FAS Lane Assistance Control Unit 5WA980653C

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0937615C-1

Audi TT FV Fuse Relay Box Module Electrical Control Unit 5Q0937615C

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0971228DH

Audi Q7 4M Q8 Mk1 Starter Motor Wiring Harness Cable Line 4M0971228DH

PLN 474.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959107AC

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

PLN 180.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0907279

Audi A6 C6 Power Supply Module Comfort Control Unit ECU 7591534

PLN 75.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8P0907063AD

Audi TT 8J Body Comfort Control BCM Module Unit ECU 8P0907063AD

PLN 617.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 1K0907719C

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 02E911023Q

Audi A3 8P Engine Starter Motor Actuator 2.0 TDI Diesel 02E911023Q

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0903291

Audi A6 C6 3.0 TDI Suppression Condenser Noise Filter 4F0903291

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959795G

Audi A6 C7 Rear Door Control Module Unit ECU Left Right N/O/S 4G8959795G

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4FO903291

Audi A6 C6 2.0 TDI Relay Condenser 4FO903291

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 03L906018RC-1

Audi Q3 8U 2.0 TDI CFGC Quattro Engine ECU Kit 03L906018RC Ignition + Key Manual

PLN 949.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959795D

Audi A8L 4H Rear Door Module Control Unit Left Right N/O/S 4H0959795D

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0941823F

Audi A4 B9 Power Distribution Fuse Box Battery 8W0941823F

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W1907063AG

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W1907063AG

PLN 1,139.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0971365

Audi A1 8X Driver's Seat Cable Seat Belt Warning Wiring Loom Harness 8X0971365

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QS919298

Audi A3 S3 8Y VW Caddy SB Mk4 Parking Sensor Module Control Unit 5QS919298

PLN 569.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8N8035223A

Audi TT 8N Amplifier BOSE Premium Audio Sound System Module 8N8035223A

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0971365J

Audi A5 8T Seat Cable Front Wiring Loom Harness Left Right N/O/S 8T0971365J

PLN 56.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0971230ES

Battery Cable Audi A3 8V Starter Alternator Wiring Harness 5Q0971230ES

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 81A035502

Audi A3 8V Wireless Charger Centre Console Phone Charging Module Unit 81A035502

PLN 123.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0907357C

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

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0959793M

Audi A5 8T Front Door Control Module Left N/S Driver's Side Unit 8T0959793M

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0959792D

Audi A1 8X Front Passenger Side Door Module Unit Control ECU 8X0959792D

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 079903805J

Audi A4 B6 B7 4.2 V8 FSI Alternator Bracket Mount Holder 079903805J

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W6907217B

Audi A5 F5 Front Windscreen Windshield Lane Assist Camera 8W6907217B

PLN 332.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907145

Audi A6 C7 Air Suspension Level Height Adjustment Module Control Unit 4H0907145

PLN 379.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8K0951253

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins 8K0951253

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8U0907468Q

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468Q

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4M0907566D

Audi S5 F5 Blind Spot Radar Distance Control Module Right O/S Master 4M0907590D

PLN 664.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T0971365C

Audi A5 8T Seat Cable Front Left Right N/O/S Wiring Loom Harness 8T0971365C

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0909518AQ-1

Audi A4 B7 1.8T BZB 163HP Engine Control Unit Module ECU Set 8E0909518AQ

PLN 807.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G2971228DQ

Audi A6 A7 4G 3.0 TDI Starter Alternator Wiring Harness 4G2971228DQ

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5Q0937084AE

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

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0971104AC

Audi Q5 8R Rear Bumper PDC Parking Sensor Wiring Harness Loom 8R0971104AC

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8R0907468F

Audi A5 8T Diagnostic Interface Gateway Control Module Unit ECU 8R0907468F

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F0971765

Audi A6 C6 Wing Mirror Adjustment Switch Wiring Loom Cable 4F0971765

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 8E0057185KX

Audi A4 B7 Radio Media Player Audio CD Head Unit Player Concert 8E0057185KX

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907801F

Audi A6 C7 Parking Brake Handbrake Module Control Unit 4H0907801F

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 7L0864643B

Battery Cover Audi Q7 4L VW Touareg 7P Porsche Cayenne 9PA Top Cap 7L0864643B

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8X0907159B

Audi A1 8X Fuel Pump Module Control Unit ECU 8X0907159B

PLN 113.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0906093G

Audi A4 B9 A5 F5 Petrol Engine Fuel Pump Control Unit Module 8W0906093G

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 83A962239

Audi A3 8Y Q3 F3 Rear Hatch Boot Lid Tailgate Opening Cable Wiring 83A962239

PLN 237.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4F1941824A

Audi A5 F5 Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824A

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 5QA919294L

Audi Q2 GA Park Parking Assist PDC Distance Control Unit Module 5QA919294L

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0035225

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

PLN 94.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0907247

Audi A6 4G Keyless Entry Aerial Antenna Control Unit Module 4H0907247

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

Part no. 4H0959793R

Audi A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

PLN 61.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W0971687BR

Audi A4 B9 Rear Right O/S Door Wiring Loom Harness 8W0971687BR

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8T2035110B

Audi A5 8T Radio Head Unit Navi CD DVD Player Changer 8T2035110B

PLN 189.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 8W6971104A

Audi A5 F5 Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 8W6971104A

PLN 142.95

Free delivery - Mon, Nov 24

If paid before 14:00

Part no. 4G8959792A

AUDI A7 4G8 Door Control Module Front Right O/S Passenger Side 4G8959792A

PLN 42.95

Delivery - Mon, Nov 24

If paid before 14:00

...

Showing 595-693 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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