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. 9270034

MINI Cooper One F55 F56 F57 Rear Antenna Aerial Amplifier DAB 9270034

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3456051-2

Mini R56 LCI Footwell Light Module High EKS ECU PL3 FRM3R 3456051

£94.95

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Part no. 6906614-1

Mini Cooper One R50 R52 R53 Power Distribution Fuse Box Front 6906614

£13.95

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Part no. 7527610-5

Mini Cooper One R50 R52 W10 Engine Control Unit DME Manual 7527610

£13.95

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Part no. 6976989

Mini Cooper One R52 Body Control Unit Basic Module BC1RD 6976989

£94.95

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Part no. 6906606

Mini Cooper One R50 R52 R53 Fuse Box Electrical Unit Cover Cap Black 6906606

£13.95

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Part no. 9805422

BMW Mini Cooper One R50 R52 R53 R55 R56 R57 R58 R59 R60 R61 Earth Ground Cable

£13.95

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Part no. 3456872

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

£218.95

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Part no. rhd-9136725-1

Mini Cooper One R55 R56 Multifuse B Battery Power Distributor Cable 9136725

£13.95

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Part no. 9812296

Airbag Module Mini R57 R59 Cabrio Convertible ECU Control Unit Air Bag 9812296

£94.95

Free delivery - Tue, Jan 13

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Part no. 9213373

Mini Cooper R57 Convertible Cabrio Petrol Fuse Box 9213373

£18.95

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Part no. 8486547

Mini Cooper F55 F56 Dual-Clutch Transmission Gearbox Control Unit Module DCT

£360.95

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Part no. R50-PARK-LANE

Mini R50 Park Lane Sticker Rear Window Decals Plates Set

£13.95

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Part no. 6975069

Mini Cooper One R50 R52 R53 Cable Door Right Wiring Harness Loom 6975062

£13.95

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Part no. 9805533

Mini R60 Rear PDC Ultrasonic Parking Sensor Royal Grey Metallic 9805533

£13.95

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Part no. 7589971-8

Mini Cooper R55 R56 Engine N12 1.6 120HP ECU Kit DME 7589971 + CAS3 + Key Manual

£142.95

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If paid before 14:00

Part no. 9811224

Mini Cooper One R55 R56 R57 Airbag ECU Control Unit Module 9811224

£13.95

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Part no. 7550017

Mini Cooper One Clubman R55 R56 R58 R59 R60 Starter Motor 1.6 Engine 7550017

£13.95

Free delivery - Tue, Jan 13

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Part no. 2751265-7

Cable Wiring Mini R55 R56 Headlight Lamp Front Left N/S Plug Socket 6913653

£13.95

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Part no. 3452071-1

BMW Mini Cooper R55 R56 R57 CCC CD DVD Navigation Sat Nav Head Unit 9185540

£142.95

Free delivery - Tue, Jan 13

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Part no. 7574294

Mini Cooper S R56 Automatic Gearbox TCU ECU Control Unit EGS Module 7574294

£47.95

Free delivery - Tue, Jan 13

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Part no. 9321022-1

Mini Cooper F55 F56 F57 B+ Junction Terminal Box 300-400 W 9321022

£13.95

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Part no. 7515206

Mini Cooper One R50 R52 Battery Alternator Starter Cable Wiring 7515206

£13.95

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Part no. 9367673

Mini Cooper F55 F56 F57 Visual Boost Surround Central Cover Instrument 9367673

£42.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6821205

Battery Wire Mini Cooper F55 F56 F57 IBS Negative Battery Lead Cable 6821205

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

£13.95

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If paid before 14:00

Part no. 6956020

BMW MINI Cooper Cabrio Convertible R52 Rear Bumper PDC Cables Wiring Loom Set

£28.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7600020-7

Mini R55 R56 R57 N12 DME Petrol Engine Control Unit ECU 7600020

£75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8644475

BMW Mini Cooper F55 F56 F57 Integrated Supply Module Z11 8644475 12638644475

£13.95

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If paid before 14:00

Part no. 7553735-5

MINI R50 R52 One 1.6i 90HP Engine ECU Kit DME 7553735 + Key + EWS Manual

£94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8605258

Mini Cooper S R55 R56 N18 Ignition Injection Valve Wiring Harness 7647197

£113.95

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Part no. 415047

Mini Cooper One R55 R56 R57 Cable Adapter iPod Connection 0415047

£18.95

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Part no. 9361145

Mini Cooper One R55 R56 R57 LCI R58 R59 CHAMP 2 Navigation 9361145

£132.95

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Part no. 8570848

Mini Cooper One D F54 F55 F56 F57 Engine Starter Motor Diesel Bosch 8570848

£28.95

Free delivery - Tue, Jan 13

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Part no. 3457403

BMW Mini Countryman R60 Footwell Light Module High EKS ECU LEAR PL3 FRM 3457403

£142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7526780

BMW Mini R50 One 1.6i Petrol Engine Control Unit DME Manual 7520019 7526780

Product currently unavailable

Part no. 8519663

BMW Mini Cooper R55 R56 LCI N47N 1.6 Diesel Engine ECU Kit DDE CAS 3 Key 8519663

£94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9151148

BMW X5 E70 X6 E71 Mini Cooper R55 R56 R57 6 Disc CD Changer 9151148

£18.95

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Part no. 9136725

BMW Mini Cooper One R55 R56 Multifuse B Battery Power Distributor 9136725

£13.95

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If paid before 14:00

Part no. 3456987-2

Mini Cooper R56 LCI Footwell Light Module High EKS ECU PL3 FRM3R 3456987

£123.95

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Part no. 3450545

Mini Cabrio R57 Roof Operating Unit Light Switch Panel 3450545

£23.95

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Part no. 7641003-2

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 Key Automatic

£522.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7168154

Mini Clubman R55 LCI Wiper Motor Actuator Window Right Rear O/S 7168154

£13.95

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Part no. 7808630

Mini Cooper One D W16 R55 R56 Engine Wiring Loom Harness 7808630 7795052

£56.95

Free delivery - Tue, Jan 13

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Part no. 6915576

BMW Mini Cooper R50 R53 Cable Door Right Wiring Harness Loom 6915575 6944249

£13.95

Free delivery - Tue, Jan 13

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Part no. 0148459-CHRED

Mini Cooper One R50 Fuel Filler Cover Flap 0148459 Chili Red - 851

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1513396

Mini Cooper One S R50 R53 Door Cable Harness Wiring Loom Left N/S 1513396

£13.95

Free delivery - Tue, Jan 13

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Part no. 9185474

Mini Cooper R60 R61 Antenna Aerial Diversity Trap Circuit 9185474

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7520936

Mini R50 Petrol W10 Engine Wiring Loom Harness Automatic Gearbox 7520936

£37.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 2758951

Mini Cooper R58 R59 Dash Roof Operating Unit Light Switch 2758951

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3457416

Mini Cooper R58 Fuse Distribution Box Control Unit High PL3 SPEG H8 3457416

£142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8625072

Wiring Loom Mini Cooper F55 F56 Harness Injection Valve Ignition 8625072

£18.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8617709

BMW Mini Cooper F55 F56 Wiring Harness Motor Sensorsystem Module 8617709

£94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9360501

Mini F54 F55 F56 F57 F60 Rear Electric Power Distribution Fuse Box 9360501

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9808713

Mini Cooper S Cabrio R57 R57N LCI Air Module ECU Control Unit Module 9808713

£94.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9806332

Mini R60 R61 Ultra Sonic Module Alarm System Sensor 9806332

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3455895

Mini Cooper One R56 Footwell Light Module Low EKS ECU PL3 FRM3R 3455895

£142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3456911

Mini Cooper R57 PL3 SPEG H4 Fuse Distribution Box 3456911

£151.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9803846-1

Mini Cooper Countryman R58 R60 R61 Aerial Roof Antenna Base Module 9803846

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3455701-1

BMW Mini Cooper Convertible R57 Footwell Light Module ECU PL3 FRM II 3455701

£113.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3453954

Mini Cooper One R57 R58 Aerial Antenna Amplifier Diversity Module 3453954

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7520019-1

Mini Cooper One R50 Petrol W10 W11 Engine Control Unit DME 7520019 Manual

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9139912

Mini Cooper One F55 F56 DAB Bluetooth Visual Boost Head Unit Basic 9139912

£218.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6820386

Mini F54 F55 F56 Operating Unit Audio Radio Control Switch Panel 6820386

£379.95

Free delivery - Tue, Jan 13

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Part no. 6937083

Ultra Sonic Module Mini Cooper R50 R53 Alarm System Sensor 6937083

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3455539-1

Mini Cooper One 1 R55 R56 R57 Radio Boost CD Player Head Unit 3455539

£132.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7152588

Mini Cooper One R50 R53 JCW Fuel Filler Cover Flap Actuator 7152588 7127872

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7570253

MINI Cooper S R52 R53 Automatic Gearbox Basic Control Unit Module EGS 7570253

£123.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. P0148459-PS

Mini Cooper One R50 Fuel Filler Cover Flap 0148459 Pure Silver - 900

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7553735-10

MINI S R52 R53 W11 Engine Control Unit Module ECU DME 7553735 Manual

£37.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9813237

Mini R60 Rear PDC Ultrasonic Parking Sensor Midnight Grey Metallic 9813237

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3456987

Mini Cooper R60 Footwell Light Module Unit High EKS ECU PL3 FRM3R Lear 3456987

£142.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7587548-5

Mini Cooper S R55 R56 N14 1.6 174HP ECU Kit DME 7587548 CAS3 + Key Manual

£474.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 2755518

Mini R55 R56 R57 Battery Tray Holder Mounting Bracket Housing Box 2755518

£13.95

Free delivery - Tue, Jan 13

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Part no. 9284331

Mini Cooper R55 R56 LCI R60 R61 Roof Light Switch Operating Unit 9284331

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3456365

Roof Security Alarm Mini R55 R56 One Ultra Sonic Module 3456365

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9342080

BMW Mini Cooper F55 F56 F57 F60 Telematics Control Unit Module 2622390

£37.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9312294

BMW Mini F54 F55 F56 F57 F60 Battery Clamping Clam Rail 9312294

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9381445

Mini Cooper F55 F56 F57 IBS Negative Battery Lead Cable 9381445

£18.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3452681-2

BMW Mini Cooper One 2 R55 R56 R57 Radio Boost CD Player Head Unit 3452681

£94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9283526

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9283526

£142.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9167397

Mini Cooper R57 R58 R59 Hands Free Telephone Microphone 9167397

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9270035

Antenna Aerial Amplifier Mini F55 F56 F60 Rear AM/FM DAB 9270035

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7525434

Mini R52 R53 W11 Battery Cable Wire Harness Starter Base B 7525434

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9154128

BMW Mini Cooper One R56 Front Left Passenger's Door Wiring Harness N/S 9154128

£17.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8617050-2

Mini Cooper R56 LCI R58 N16 1.6 122HP Engine ECU Kit DME 8617050 CAS 3 + Key

£189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 3455305

Mini R57 R57N R58 R59 DWA-Alarm System Relay ECU 3455305 65753455305

£13.95

Free delivery - Tue, Jan 13

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Part no. 9240945

Mini Cooper D R55 R56 R57 R60 LCI Electrical System Fuse Distribution Box

£13.95

Free delivery - Tue, Jan 13

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Part no. 6915063

Ultra Sonic Module Mini R50 R53 Alarm System Sensor 6915063

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7510921

Mini R52 Cabrio Petrol W10 Engine Wiring Loom Harness Module 7510921

£28.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7638322

Mini Cooper One R56 LCI N16 1.6 122HP Petrol Engine Unit ECU DME 7638322 Manual

£161.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7640005-2

Mini Cooper R55 R56 R57 N12 120HP ECU Control Unit Kit DME 7640005 CAS3 Key

£132.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9213374

Mini R55 R56 R57 Cover Power Distribution Fuse Box 9213374

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7589971-2

ECU Kit Mini One R55 R56 R57 N12 95HP DME 7589971 + CAS3 + Key Manual

£94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7542310

BMW Mini Cooper One R50 DME Petrol Engine Control Unit ECU Automatic 7542310

£13.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8519663-2

Mini Cooper R56 LCI R60 N47N 122HP Diesel Engine ECU Kit DDE 8519663 CAS 3 Key

£75.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8519663-4

Mini Cooper D ALL4 R60 N47N 1.6 Diesel Engine ECU Kit DDE 8519663 CAS3 + Key

£170.95

Free delivery - Tue, Jan 13

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Part no. 7641003

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 + Key Manual

£474.95

Free delivery - Wed, Jan 14

If paid before 14:00

Part no. 9399466

Mini F54 F55 F56 F57 F60 Telematics Control Unit Module 84109399466 9399466

£18.95

Free delivery - Tue, Jan 13

If paid before 14:00

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Showing 100-198 of 1559 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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