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. 8518569-5

BMW F20 F21 F30 F31 N47N 118d 318d 143HP Engine Control ECU DDE 8518569 Manual

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2479002513

Telematic Control Module Mercedes W447 W907 W910 Telematics Unit A2479002513

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8P0035192SX

Audi A3 S3 8P Radio Media GPS Sat Audi Navigation Plus Unit 8P0035192QX

€237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6421509478-3

Mercedes W164 ML320 OM642.940 224 HP 4Matic Engine ECU Kit A6421509478 Automatic

€279.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8587952-7

Mini Cooper D F55 F56 B37 116HP Diesel ECU Engine Unit DDE 8587952 Manual

€94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2205404208

Mercedes W220 Rear PDC Parking Sensor Wiring Loom A2205404208

€28.95

Free delivery - Tue, Nov 25

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

€161.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9824601180-1

Citroen Relay III 2.2 DW12RUD Engine Module ECU Kit Ignition + Key 9824601180

€503.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7357564830

Citroen Relay 35 L Steering Column Cluster Wiper Switch Stalk Control 7357564830

€222.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 46859297

Citroen Relay III Air Module Sensor Control Unit ECU 12V 46859297

€165.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4G8959793J

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6800903-2

Mini R50 R52 R53 Steering Wheel Horn Switch Left Right N/O/S Set 6800903

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3413934-2

BMW X3 E83 Rear Bumper Wiring Loom PDC Harness 1452049

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8E0909518AQ-1

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

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9371131

Seat Control Unit BMW F30 F36 Front Seat Module Unit Controller ECU 9371131

€80.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K2971228G

Audi A5 8T 1.8 TFSI Starter Alternator Harness Wiring Cable 8K2971228G

€70.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9285505

Distribution Junction BMW X5 X6 F15 F16 Power Battery Control Unit 9285505

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9390835

Sound Amplifier BMW X5 F15 X6 F16 Active Harman Becker Design 9390835

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8J0057186JX

Audi TT 8J Radio Head Unit CD Audio Player Control Unit 8J0035186J

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1K0906093F

Fuel Pump Control Audi A3 8P VW Golf Mk6 Relay Module Unit ECU 12V 1K0906093F

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9242670

DVD Changer BMW F01 F10 F11 F12 F20 F30 Disc Changer Control Unit 9259800

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218207502

Mercedes W221 Front Centre Dashboard Speaker Logic 7 A2218207502

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8R0907468T

Audi Q5 8R Gateway Module Control Unit ECU 8R0907468T 8R0907468C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0907361C

Audi A3 8V Fuse Box Control Module Relay Box 5Q0907361C

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03G906056S

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

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907551-1

Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine ECU Kit 8K0907551 Automatic

€246.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8V0907159

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8582279-7

BMW F30 F32 320d Engine Module Control Unit ECU DDE ed 420d N47N 163HP 8582279

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8582279-8

BMW F30 F32 F34 GT 320d 420d N47N 184HP Engine Module Unit ECU DDE 8582279

€51.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1J0971235S

Audi TT 8N HV Battery Negative Earth Terminal Harness Wiring Cable 1J0971235S

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8380118

BMW E46 Amplifier Holder Audio Catch Bracket Mount Trim 8380118

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8574091-6

BMW F10 F11 520d N47N 184HP Engine ECU Kit Unit DDE 8574091 CAS4 + Key Manual

€170.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0919604H-1

Audi A8L 4H Navigation Dashboard Display Hud Screen 4H0919604H

€165.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9366407

BMW F20 F21 F30 F31 F32 Body Comfort Module FEM ECU LR01 Control Unit 9366407

€161.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1645400750

Mercedes ML W164 Battery Fuse Box Power Distribution A1645400750

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6935597-TS1

BMW E81 E87 Front Rear Parking Sensor PDC Titansilber Silver 354 6935597

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8507902

Engine Wiring BMW F20 F21 F22 F30 F31 F34 F32 F33 F36 Harness Loom 8507902

€66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3419515

BMW E83 LCI Valvetronic Starter Cable Wire Loom 3419515

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0971142C

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2115400008

ABS Sensor Mercedes W211 C219 Front Brake Wiring Harness Right O/S A2115400006

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2118705726

Air Module Mercedes W211 C219 Air System Control Unit ECU A2118705726

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6942100

BMW E60 Air Module Control Unit Gateway Sensor B Pillar Right O/S 6942100

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048700185

Mercedes W204 Bluetooth Control Unit Module Media Interface ECU A2048700185

€99.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218705087

Mercedes W221 Seat Memory Control Unit Module Front Right O/S A2218705087

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 1J0906381B

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218703086

Mercedes W221 Seat Module Front Right O/S Memory Control Unit A2218703086

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9270020

BMW F06 F12 F13 Front Wiring Loom PDC Harness Parking Sensor 9270020

€89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0959792

Audi A4 B8 Door Module Control Unit Module ECU Front Left N/S 8K0959792

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 059903019H

Audi A8 D4 Alternator Generator Electrical Unit 3.0 TDI Diesel Engine 059903019H

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L906022DH

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

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W0971104A

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

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8J0035223E

Audi TT 8J Coupe Roadster Ultrasonic Sound Control Module ECU Unit 8J0035223E

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6421509478

Mercedes ML W164 OM642 Diesel Engine Control Unit Module ECU A6421509478

€189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 02M911023P

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8J0951177

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1698209226

Door Control Module Mercedes W169 W245 Relay Unit Right Rear O/S A1698209226

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1698200611

Mercedes W245 Bluetooth Module Telephone Control Unit A1698200611

€89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9328591

BMW X6 F16 Boot Trunk Lid Tailgate Wiring Loom Harness Cable 9328591

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3415607

BMW X3 E83 LCI Petrol N52N Cable Alternator Starter Base B+ 3415607

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6401500734

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine Module ECU A6401500734

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0971104S

Audi A8 D4 Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 4H0971104S

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W6971104A

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

€32.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9496815

Front Impact Sensor BMW F70 G05 G14 G15 G29 Safety Crash Module Unit 9496815

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7928682

Radio Receiver BMW F40 F44 G20 G26 Radio Remote Control Unit 434 MHZ 7928682

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 059971627D

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2095451701-1

Mercedes A209 Fuse Box SAM Control Module Relay Box A2095451701

€123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8580165

Mini F54 F55 F56 F57 F60 B47 Wiring Harness Engine Glow Plug Module 8580165

€37.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K0907064FF

Audi A4 S4 B8 Body Control Comfort Unit Module BCM2 Unit ECU 8K0907064FF

€113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9383181

BMW F20 F21 F22 F30 F31 F32 F36 Fuse Box Body Module Control Unit FEM 9383181

€123.95

Free delivery - Tue, Nov 25

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 - Tue, Nov 25

If paid before 14:00

Part no. 4H0959591A

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1635408905

Mercedes-Benz M-Class ML W163 Rear Axle Brake Wiring Loom Harness A1635408905

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4S0907441B

Audi A8 D4 4H Rear View Reverse Parking Camera Module Control Unit 4S0907441B

€89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2535402605

Mercedes GLC X253 Rear Bumper Wiring Loom PDC Harness Parking Sensor A2535402605

€66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W6971030BF

Audi A5 F5 Front Door Wiring Harness Cable Passenger Side 8W6971030BF

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W6971029BF

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

€85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907182H

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0971663A

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

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0959107AC

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

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0881073B

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

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907401M

Audi A8 4H 3.0 TDI CTBA Quattro 258HP Engine Control ECU 4H0907401M

€446.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2118700726

Mercedes W211 Seat Memory Control Unit Module Front Right O/S A2118700726

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A4709820700

Mercedes W470 Glow Plug Relay Module Unit A4709820700

€28.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0959760D

Audi A8 4D Front Seat Memory Adjustment Module Unit Right O/S 4H0959760D

€56.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2219005404

Mercedes R231 Seat Memory Control Unit Module Front Right A2219005404

€379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8572439-3

Engine Control Unit BMW F30 F31 N57N 330d 258HP ECU DDE 8572439 Automatic

€61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0035670T

Audi A8 D4 Reader Radio CD System Audio MMI Multimedia Head Unit 4H0035670T

€550.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03G906018DN-2

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

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0035225L

Audi A8 D4 4H Aerial Antenna Amplifier AMP Booster Module 4H0035225L

€23.95

Free delivery - Tue, Nov 25

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 - Tue, Nov 25

If paid before 14:00

Part no. 4H0962239A

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

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9277812

BMW 2 Series F23 Convertible Rear Trunk Tailgate Antenna Aerial DAB 9277812

€67.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907412

Audi A8 D4 Ambient Lighting Control Module Unit ECU 4H0907412

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H4907357B

Audi A8 D4 Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357B

€75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907064FB

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

€42.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0907468AF

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

€66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W1959595D

Audi Q5 FY Rear Door Control Module Unit Left Right N/O/S 8W1959595D

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2048709289

Mercedes W204 Right O/S Antenna Amplifier Filter Module A2048709289

€23.95

Free delivery - Tue, Nov 25

If paid before 14:00

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Showing 496-594 of 11775 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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