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.

More information

Make

Category

Subcategory

Condition

In Stock

Price

Products in promotion

Part no. 3456872

Mini Cooper R55 R56 R57 LCI R60 Radio Boost CD Player Unit Head 3456872

€256.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9177983

BMW E87 LCI Body Control Module Junction Box H2 9177983

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9289385

BMW F10 F34 GT Telematics Module Bluetooth Telematik Control Unit 9289385

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8507906

BMW 1 3 F20 F21 F30 Engine Gearbox Wiring Harness Glow Plug Module 8507906

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9231443

BMW 3 Series F30 F80 M3 Radio Antenna Amplifier Suppression Filter 9231443

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1729006503

Mercedes SLK R172 Roadster Folding Roof Module Vario Control Unit A1729006503

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5A41CA2

Air Module BMW F45 F46 Mini F55 F56 F60 ECU Control Unit 5A41CA2

€237.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8X0907159C

Audi A1 8X Impact Sound Actuator Control Module 8X0907159C

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 2622341

BMW 2 3 5 Series F10 F22 F30 F32 Antenna Amplifier Module Trap Circuit 2622341

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9171984

BMW E60 E61 E63 E64 LCI Control Unit Lane Departure Warning Module ECU 9171984

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9348935

BMW X1 F45 F48 Mini F55 F56 F60 Air Module Control Unit Module ECU 9348935

€151.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2239053002

Mercedes Vito W447 Aerial Antenna Amplifier Control Unit Module A2239053002

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2188201926

Mercedes CLS C218 Bi-Xenon Headlight Ballast Module Control Unit A2188201926

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8E0971693P

Audi A4 B7 Door Card Speaker Harness Loom Cable Wiring Rear 8E0971693P

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6968835

BMW 1 Series E87 Footwell Control Module Body H2 61356968835 6968835

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8586540

BMW F30 F32 LCI 330d 430d N57N 258HP Engine Control Unit Module ECU DDE 8586540

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 0AM911023T

Volkswagen Touran 1T 1.4 TSI Petrol Engine Starter Motor 0AM911023T

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8T0907468H

Audi A4 B8 Gateway Interface Control Module Unit ECU 8T0907468H

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5Q0919275B-BLK

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6940432

Mini Cooper R50 R53 Adapter Lead With Diode EHPAS Cable Wiring 6940432

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2115454840

Mercedes E-Class S211 W211 Battery Tray Holder Mounting Bracket A2115454840

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8S0907468D

Audi TT FV Mk3 8S Gateway Module Interface Data Bus Control Unit 8S0907468D

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2535405429

Mercedes C253 OM656 Diesel Engine Motor Wiring Loom Cable Harness A2535405429

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9139899

BMW F07 F10 LCI F06 F12 F13 MMI Multimedia CD Player Reader Head Unit 9139899

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9459673-1

Seat Module BMW X4 F26 F20 F30 Front Driver Side Control Unit ECU 9250421

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8510221-2

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

€227.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8067512

BMW F10 F11 F30 F31 Alarm System Unit Security Basis Module 8067512

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6956750

BMW E87 Control Unit PDC Parking Sensor Module Nautikblau Blue - A21 6956750

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 02M911024R

Seat Ibiza 6J Starter Motor Petrol Engine Electrical Unit Actuator 02M911024R

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2129009128

Door Module Mercedes W207 W212 CLS W218 Front Left N/S Control Unit A2129009128

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9123739

BMW 1 3 5 7 Series E81 E87 E90 E91 E92 F01 USB USB Hub Audio Interface Module

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4B0959643E

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9226326

BMW E81 Body Control Module Control Unit L2 PL2RR JBBFE III ECU 9226326

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 24445098

Opel Astra Vectra Zafira Immobilizer Antenna Immobilizer Module Unit 24445098

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8573257-7

BMW F30 F31 320d ed Diesel N47N 163HP ECU Kit DDE 8573257 + Key + FEM Automatic

€123.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7115655-LMB

BMW X3 E60 E61 E83 Front PDC Parking Distance Sensor Le Mans Blau - 381

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7592511

BMW E88 E90 E91 E92 LCI F20 F21 F30 Ignition Wiring N55 Engine Harness 7592511

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8571350

BMW 1 5 Series F10 F11 F20 F21 LCI B47 Starter Acoustic Vibration Plug 8571350

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8630125-4

BMW F20 F21 F30 116i 316i N13 136HP Engine Control ECU Kit DME 8630125 Automatic

€503.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9171900

BMW X5 E70 X6 E71 Computer Control Unit DVD Player RSE MID PLUS PL4 9171900

€360.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2661536679-2

Mercedes W169 A170 M166.940 116HP Engine Unit Module ECU A2661536679 Automatic

€56.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 80A907777N

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

€284.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9873895

BMW F40 Crash Control Unit Air Module ECU Continental 9873895

€123.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7L0959655

Volkswagen Touareg 7L Air Module Control Unit Crash Impact Sensor 7L0959655

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8595865

Wiring BMW F32 F33 F36 LCI N57Z Engine Gearbox Module Wiring Harness 8595865

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8K0907064DC

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

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 95910-1H050

Kia Ceed Hyundai Air Module Safety Control Unit Ver. 3.3 ECU 95910-1H050

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9264923

BMW F01 F02 F10 F11 F13 Power Distribution Fuse Box Rear 9264923

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9399247

BMW F20 F30 F31 F32 ECU Camera Module Based Drive Support

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6R0971537N

Seat Ibiza 6J Battery Ground Line Earth Negative Cable Wiring 6R0971537N

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0009054807-2

Mercedes W118 W177 W206 W247 NOX Sensor Electronics Module A0009054807

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7404880

Fuel Pump Module BMW F20 F21 F30 F31 Control Unit ECU 7404880

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0009827723

Fuse Relay Mercedes W176 W204 W246 4-Pin Unit Black Hella A0009827723

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6941503

BMW X5 Series E53 Cable Harness Door Front Right Left N/O/S 6941503

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0061516201

Starter Motor Mercedes Sprinter W204 W211 W212 OM646 Diesel Engine A0061516201

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 1T0909606

VW Volkswagen Touran 1T Air Module Control Unit Crash Impact Sensor 1T0909606

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2048210197

Door Cable Guide Mercedes W204 Front Wiring Loom Harness Channel A2048210197

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9265300

BMW 1 2 Series F20 F21 F22 F23 LCi Headlight Switch Control Element Light

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6921979

Door Module BMW E65 E66 E67 Front Door Control Unit Passenger Side 6921979

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7638001

BMW 1 3 Series F20 F21 F30 F31 N47N Earth Cable Battery Engine 7638001

€22.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9270354-1

Mini F55 F56 BMW F45 X1 F48 Rear Electric Power Distribution Fuse Box 9270354

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2115452301

Mercedes-Benz E-Class S211 W211 Fuse Box Terminal Connection Unit A2115452301

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9240236

BMW F01 LCI F10 F12 High Voltage Battery Charging Unit Module BCU 150 9240236

€94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3D0959933F

VW Volkswagen Phaeton 3D BCM Body Comfort Control Unit Module ECU 3D0959933F

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1695400209

Mercedes W169 W245 Diesel Engine Starter Wiring Loom Cable A1695400209

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4H4907357G

Audi TT 8S Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357G

€66.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A1679008207

Telematics Module Mercedes W177 W247 Communication Control Unit ECU A1679008207

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4E0035225BQ

Audi A8 D3 Aerial Amplifier Antenna Receiver Signal Booster Unit 4E0035225BQ

€32.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9298945

BMW X1 E84 ECU Body Control Module Junction Box H2 PL2RR JBBFE IIIR 9298945

€113.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9234942

Telematics Module BMW E81 E87 E90 E91 E92 LCI Combox Navigation 9234942

€142.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9225619

BMW F10 Electronic Front Seat Memory Module Control Unit ECU 9225619

€70.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 5Q0907530AH

Audi A3 S3 RS3 8V Gateway Control Module GW MQB Mid Unit ECU 5Q0907530AH

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2129004718

Door Module Mercedes W212 Front Right Control Unit Module A2129004718

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3Q0907530AG

Audi Q2 Q3 F3 1.5 TFSI Gateway Control Unit Module ECU 3Q0907530AG

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2124401851

Mercedes W212 Door Wiring Loom Cable Rear Left Right N/O/S A2124401851

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4G0907468AB

Audi A6 C7 Gateway Module Control Unit ECU 4G0907468AB

€89.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8519668

BMW E90 E91 LCI 320d N47N 184HP Engine Control Unit ECU DDE 8519668 Manual

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A4475406453

Battery Cable Mercedes Vito W447 Diesel OM651 Alternator Wiring A4475406453

€37.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9803844-4

Aerial Roof Antenna Mini Cooper Countryman R58 R60 R61 Base Module 9803844

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A6519007500-4

Mercedes W204 C250 CDI BlueEFFICIENCY OM651.911 Engine ECU A6519007500 Automatic

€108.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9267535

BMW X3 F25 Body Control Module ECU Junction Box JBBFE III 3 V9 Lear 9267535

€37.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 7552176-7

BMW Z4 E85 2.0i N46 150HP ECU Engine Control Kit DME 7552176 CAS2 Key Manual

€332.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2059007218-2

Mercedes GLC X253 Rear Trunk Lid Automatic Closing Lock Mechanism A2059007218

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0038207926

Door Module Mercedes W221 Door Control Unit Module A0038207926

€70.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A0009004434-2

Parking Control Module Mercedes C118 W177 W247 PDC Bluetooth Unit A0009004434

€142.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6911024

BMW Z4 E85 E86 Battery Mounting Bracket Part Holder 6911024

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6906604-1

BMW Mini Cooper One R50 R52 R53 1 Power Distribution Fuse Box Front 6906604

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8X0971365

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

€42.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 95B971693F

Porsche Macan 95B-2 Rear Door Card Wiring Harness Left Right N/O/S 95B971693F

€51.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 3D0919283C

Volkswagen VW Phaeton 3D PDC Parking Sensor Control Unit Module 3D0919283C

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A6461505091-2

Mercedes W203 C220 CDI 150HP 646.963 Engine Control ECU Kit A6461505091 Automat

€208.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 6C0907361E

Fuse Box Audi A1 Seat Ibiza Control Module Relay Box 6C0907361E

€75.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 4E0035225BL

Audi S8 D3 Aerial Amplifier Antenna Receiver Signal Booster Unit 4E0035225BL

€28.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 8R0971104AC

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

€47.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9231399

Camera Module BMW F01 F07 F10 F11 F12 Based Assist Systems Control Unit 9231399

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9189905

BMW X5 E70 X6 E71 Safety Control Unit Air Module Bag ECU Bosch 9189905

€23.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. A2719000700

Mercedes R171 SLK200 Kompressor M271.954 Engine Control Unit ECU A2719000700

€180.95

Free delivery - Wed, Jan 14

If paid before 14:00

...

Showing 2773-2871 of 12469 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 .

used parts volkswagen car parts mercedes used car parts cheap car parts audi auto parts spare parts genuine used audi parts bmw starters, alternators, ecus & wiring mercedes starters, alternators, ecus & wiring mini starters, alternators, ecus & wiring audi starters, alternators, ecus & wiring volkswagen starters, alternators, ecus & wiring