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. A2124405833

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405833

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 3457402

Mini Cooper R58 Coupé Footwell Light Module High EKS PL3 FRM3R 3457402

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 09G927750CA

Audi TT 8N Automatic Gearbox Module Control Unit ECU 09G927750CA

PLN 569.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3456478

Mini R58 Door Module Harness Wiring Loom Cable Set Driver's Side 3456478

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9231179

Antenna Amplifier BMW F30 F80 M3 F82 M4 Rear Aerial Booster AM/FM DAB 9231179

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9118931

BMW E60 E61 LCI Airbag ECU Control Unit Module 9118931

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6970904

BMW 7 Series E65 E66 E67 Sensor Rear Seat Airbag 65776970904 6970904

PLN 46.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2218705687

Mercedes W221 Linguatronic Control Module Unit ECU English Version A2218705687

PLN 360.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7570254

Plus Cable BMW X1 E81 E87 E90 E91 N45 N46 Alternator Starter Wiring 7570254

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2128203985

Mercedes W204 W212 Door Module Rear Left N/S Control Unit Module A2128203985

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1635400441

Mercedes-Benz M-Class ML W163 Ground Cable Right O/S Wheel Arch A1635400441

PLN 93.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9281068

Antenna Receiver BMW F33 F83 M4 Convertible Aerial DAB Unit 9281068

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8W0906093D

Audi A4 B9 Fuel Pump Control Unit Module ECU 8W0906093D

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. F20-On-Board-Screen

On-Board Screen BMW F20 F21 F30 F31 Information Display Touch Monitor 8,8"

PLN 1,206.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9136039

BMW E60 E63 Body Control Module ECU Control Unit 9136039

PLN 47.95

Delivery - Tue, Nov 25

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Part no. 6861026

BMW I01 F45 F46 Mini F55 F56 Parking Assistant PDC Control Unit Module 6861026

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2045420623

Mercedes W204 Warning Device Parktronic Display Rear Sound Signal A2045420623

PLN 85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 95B035736A

Porsche Macan 95B USB SD SIM Card Module Multimedia Reader Port 95B035736A

PLN 474.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 059903018E

Audi Q7 4L Diesel Alternator Generator Engine Electrical Unit 059903018E

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6968651

BMW 3 Series E93 Cabrio Rear Left N/S Aerial Antenna Unit AM/FM 6968651

PLN 132.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6974373-1

BMW E81 E84 E87 E88 E90 Ultra Sonic Module Alarm System 9149671

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 1388911

BMW E36 E38 E21 E85 R52 R57 Change-Over Contact Relay Violet 1388911

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9270491-BS

PDC Parking Sensor BMW E70 LCI F07 F25 Ultrasonic Black Sapphire 9216207

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3AA919041

VW Sharan 7N Voltage Stabilizer Converter Electric Control Unit Module 3AA919041

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6964139

BMW 7 Series E65 E66 E67 Front Control Unit Door Passenger Side 6964139

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 7533103

Mini Cooper S R52 R53 W11 Engine Wiring Loom Harness 7533103

PLN 237.95

Free delivery - Tue, Nov 25

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Part no. 9243896-1

Central Information Display BMW F10 F11 LCI Boardmonitor Screen 7" 9243896

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A1729060205

Mercedes SLK R172 Rear SAM Fuse Relay Box Control Unit Module A1729060205

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8507924

Gearbox Wiring BMW F20 F30 125d 325d N47S1 Engine Loom Harness Cables 8507924

PLN 360.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2038219551-2

Mercedes CL203 Rear Roof Alarm Motion Sensor Control Unit Module A2038219551

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 80A907247

Audi SQ5 FY Line Keyless Entry Antenna Control Module 80A907247

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6971353

BMW X3 E46 E83 Navigation Computer GPS System DVD Player Unit 6971353

PLN 427.95

Free delivery - Tue, Nov 25

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Part no. 6942100

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

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8C1T-18C815-AD-1

Ford Transit Radio Head Unit 6000 CD Media Player Unit 8C1T-18C815-AD

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6900583

BMW E65 E66 Power Distribution Box 6900583

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 7394649

BMW F01 F02 F03 F10 LCI X3 F25 Control Unit Rear Function Module 7327886

PLN 379.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03C903024F

Alternator Audi A3 8P VW Passat B7 Engine Generator 1.4 TSI 03C903024F

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 130002613

BMW 5 X5 7 Series E60 E60N E61 E65 E66 E67 E70 Drive Longitudinal Seat Adjust

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9224275

BMW F01 F02 F07 GT Control Unit Air Module ECU 9224275

PLN 94.95

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

PLN 104.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129000217

Mercedes W212 Radio Head Unit Navi CD Player Control Unit A2129000217

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9217004

Battery Cable Plus BMW X5 E70 E70N LCI X6 E71 Positive Pole 9217004

PLN 113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7591534

BMW F01 F10 F20 F21 F30 F87 Integrated Supply Module Unit 7591534

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9243667

BMW X3 F25 X4 F26 Rear Door Left Right N/O/S Wiring Loom Cables Harness 9243667

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9364552

Seat Wiring BMW F45 X1 F48 Mini F55 F56 Passenger's Side Sensor Cable 9364552

PLN 94.95

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

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059007143

SAM Module Mercedes W205 Trunk Rear SAM Control Module A2059007143

PLN 408.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2069055100

Mercedes C118 W167 W177 W206 W247 Stereo Amplifier Harman Kardon A2069055100

PLN 42.95

Delivery - Tue, Nov 25

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 - Tue, Nov 25

If paid before 14:00

Part no. 6927270

BMW 5 Series E60 Seat Control Unit Module Left Right N/O/S Temic 6927270

PLN 132.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2229001814

Door Module Mercedes W205 X253 Rear Left N/S Control Unit A1698209126

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059067200

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6839769

KaFAS Module BMW F10 F20 F30 Mini F55 F56 Assist Camera Control Unit 6839769

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6922262

BMW 7 Series E65 E66 E67 Control Unit Door Front Passenger Side 6922262

PLN 37.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A6549061600

Starter Motor Mercedes W205 W213 W238 W447 OM654 Engine Diesel A6549061600

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 4H0911075B

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

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8693361

BMW F87 M2 Engine Control ECU Kit DME 8693361 N55 370HP Key Dual Clutch

PLN 3,324.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7789231

BMW X5 E46 E53 E60 E65 Preheater System Lead Cable Starter 7789231

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2049012704

Mercedes W204 ECU Control Unit Crash Impact Sensor Air Module A2049012704

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 5Q0959393

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

PLN 123.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8507899

BMW F31 N47N 320d Engine Wiring Harness Module Diesel 8507899 8507896

PLN 237.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9234087

BMW E70 F01 F02 F10 F11 Rain / Light / Solar Fogging Sensor Control Unit 9234087

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9281722

BMW E93 Cabrio Convertible Folding Top Roof ECU Module CTM 9281722

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9381581

BMW i3 I01 IBS Cable Negative Battery Lead Wiring Harness Control Unit 9381581

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9222071

BMW F07 BCM Body Control Module Unit Controller 9222071

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9142092

Bluetooth Antenna BMW X1 X3 Z4 E84 E89 F01 F02 F03 F25 Amplifier AMP 9142092

PLN 42.95

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

PLN 313.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2215403110

Mercedes W221 Positive Battery Cable Wire A2215403110

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 3455305-1

2 x Mini R57 R58 R59 DWA Door Alarm System Module Control Unit Set 3455305

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A6541500800

Mercedes W177 W213 Engine Wiring Harness Loom E220d Diesel A6541500800

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9257152

Telematics Bluetooth BMW F10 F20 F22 F30 Combox GPS Control Unit Module 9257152

PLN 241.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A6459060800

Starter Motor Mercedes W176 W246 C117 Diesel Engine Denso A6459060800

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9177784

BMW X5 E70 X6 E71 X6 E72 Map Fuse Box Grouping Diagram Card 9177784

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1698206726

Mercedes-Benz W245 ECU Control Unit Sensor Module Airbag A1698206726

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2129004014

Mercedes W204 W212 Front Door Module Control Unit Module Left N/S A2129004014

PLN 61.95

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

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1694710141

Mercedes W169 W245 Fuel Pump Cable Harness Bracket Mount Trim A1694710141

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A2118703126

Headlight Module Mercedes C209 W211 CLS C219 Level Control Unit ECU A2118703126

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 8K1907401K

Audi A4 B8 8K A5 8T 2.7 TDI 190HP CGKA Engine Control ECU 8K1907401K Automatic

PLN 332.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8590041

BMW G30 G31 B47 Diesel Glow Heater Plug Engine Wiring Loom Cable 8589786

PLN 113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A1779005104

Mercedes W177 Ambient Lighting Control Module Unit ECU A1779005104

PLN 161.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2188201926

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

PLN 332.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8678967

Mini Cooper R56 Petrol Engine Installation Wiring Loom Harness 8678967

PLN 170.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8582719-1

Mini F55 F56 Cooper D B37 Diesel Engine ECU Kit DDE 8582719 BDC + Key Manual

PLN 1,519.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9337881

BMW 1 3 4 F20 F21 F30 F31 F32 Power Distribution Fuse Box Rear 9337881

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A2079013700

Mercedes-Benz E-Class W207 Windscreen Windshield Rain Sensor Control Unit

PLN 75.95

Free delivery - Tue, Nov 25

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Part no. A6081550035

Mercedes W177 Alternator Mounting Bracket Carrier A6081550035

PLN 284.95

Free delivery - Tue, Nov 25

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Part no. A1779005409

Door Module Mercedes C118 W177 H243 Front Right O/S Door Control A1779005409

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7M0951253C-1

VW Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A1669004002

Door Module Mercedes C117 W176 W246 Front Left N/S Control Unit A1669004002

PLN 85.95

Free delivery - Tue, Nov 25

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Part no. A0015425918-ALB

Mercedes W202 C208 W208 W220 Parking Distance Sensor PDC Almandine Black

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A1775405501

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775405501

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6920469

BMW E65 E66 E67 Sensor A-pillar Right Airbag 65776920469 6920469

PLN 47.95

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Part no. 8T0959795Q

Audi A5 B8 8T Door Module Control Unit Left Right N/O/S 8T0959795Q

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6824129

Inverter Wiring BMW F45 Mini F60 Hybrid High Voltage Battery Cable Loom 6824129

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6957759

BMW E60 E61 E63 Driver Side Door Air Module Control Unit Module 6957759

PLN 85.95

Free delivery - Tue, Nov 25

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Part no. 06L971627K

Audi TT FY 2.0 TFSI Petrol Fuel Injectors Wiring Harness 06L971627K

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 5A0BD89

BMW F40 Power Distribution Fuse Box LIN Control Unit Module 5A0BD89

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 7394466

BMW F10 F11 X5 F15 LCI F32 F33 Adblue Module Control Unit ECU SCR 7394466

PLN 332.95

Free delivery - Tue, Nov 25

If paid before 14:00

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Showing 3268-3366 of 11506 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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