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. A2056186100

Mercedes W205 W238 Rear Battery Holder Bracket Mount Strap Clamp A2056186100

€23.95

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BMW X3 F25 Body Control Module ECU Junction Box JBBFE III V8 9350705

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BMW E87 LCI E90 E91 N43 170HP Engine Control Unit ECU KIT DME 7599881 Automatic

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Audi A3 Starter Motor Engine Diesel 02E911023H

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Audi A5 F5 BCM Body Comfort Module Onboard Control Unit ECU 8W0907064EC

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Skoda Octavia 5E Audi A8 D4 Impact Sound Control Module Unit ECU 5E0907159

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BMW 3 5 Series E60 E90 Portable DVD System Alarm Ultra Sonic Module Unit 6980090

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BMW E89 F10 F25 F26 Battery Clamp Bracket Holder 7586426

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BMW E65 E66 X5 E70 X6 E71 Video TV Tuner Module Control Unit ECU 9177195

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Head Unit BMW F20 F21 Radio Media GPS Sat Navigation Unit 6820526

€142.95

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Ford Mondeo Mk4 2.2 TDCI 175HP Engine Control Unit ECU 8G91-12A650-EN Manual

€113.95

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Volkswagen T-Roc Golf Mk8 USB-C Port Socket Double Rear Centre Console 2G6035954

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Volkswagen Touareg 7P ESP Yaw Rate Sensor Module Unit Control ECU 7P0907652C

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Range Rover L405 Door Module Control Unit Driver's Side CPLA-14D618-AC

€32.95

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Land Rover Discovery Sport L550 Body Control Module BCM Unit FK72-14F041-AE

€85.95

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BMW F40 Heater Air Conditioning System Control Unit Module 5A075F7

€32.95

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Audi A3 8P 1.8 TFSI CDAA 160HP Engine Control Module ECU Kit 8P7907115K Manual

€208.95

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Part no. 7PP959663E

Porsche Cayenne 92A VW Touareg 7P Voltage Stabilizer Control Module 7PP959663E

€23.95

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Part no. 3455304

Mini R57 Cabrio DWA Door Alarm Theft Deterrent System Unit 3455304

€23.95

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Wiring BMW F12 F13 F06 Cable Set For Electric Parking Brake Handbrake 9242204

€80.95

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Part no. 6968649

BMW E93 Convertible Aerial Antenna Amplifier FM/AM Left N/S 6968649

€23.95

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Mercedes-Benz S-Class W221 Rear Door N/O/S Control Unit Module A2219009903

€23.95

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Part no. A2215407710

Mercedes W221 Battery Negative Terminal Cable Wiring Wire A2215407710

€23.95

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Part no. A2215408045

TPM Module Mercedes W221 S500 C216 Tire Pressure System Module RDK A2215408045

€28.95

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Part no. A1694710141

Mercedes W169 W245 Fuel Pump Cable Harness Bracket Mount Trim A1694710141

€23.95

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Part no. 6956744-1

BMW E81 E82 E87 E88 E90 E91 Parking Sensor PDC Sydneyblau - A19 6956744 SET X2

€28.95

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Part no. 8512589

BMW E81 E82 E87 LCI E88 N47S 123d 204HP Engine Unit ECU Kit DDE 8512589 Manual

€341.95

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Part no. 8585225-2

Mini F55 F56 Cooper SD B47 170HP Engine Control ECU Kit DDE 8585225 Manual

€531.95

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Part no. 9289590

BMW X5 X6 E70 E71 Antenna Amplifier Module Trap Circuit 9289590

€23.95

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Mercedes Vito W639 Door Handle Cable Catch Bowden Cable Rear A6397600340

€23.95

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Audi S6 C6 6-Disc CD Changer Magazine Head Unit MMI 4E0910110E

€37.95

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BMW E87 E90 Seat Wiring Front Sport Seat Lumbar Loom Harness Cable 6942556

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Mini Cooper One R50 R53 Loudspeaker Rear 65136956166 6956166

€23.95

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VW Volkswagen Audi Skoda Seat Little Fuse Amp 30A 12V 443937105A

€23.95

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Part no. 8494948

BMW F40 F44 F48 Mini F54 Rear Tailgate Smart Opener Top Wire Sensor 8494948

€32.95

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Part no. 7PP959663E-1

Porsche Cayenne 92A VW Touareg 7P Voltage Stabilizer Control Module 7PP959663E

€23.95

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Audi A6 C6 MMI Multimedia Navigation Control Head Unit 4E0035654A

€284.95

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BMW F20 F21 F30 F31 F32 X5 F15 X6 F16 Power Distribution Fuse Box Front 9389069

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Audi A6 C6 Door Module Front Driver's Side Control Unit ECU 4F0959793P

€23.95

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Ford Transit Custom Mk8 Engine Wiring Loom Harness Cable KK2T-9K499-CBC

€89.95

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Porsche Cayenne 955 Radio Aerial Antenna Amplifier Rear Right O/S 7L5035225A

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Ford Fiesta Mk7 Rear Tailgate Wiring Loom Harness Cable C1BT-17K400-AAF

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Mini Cooper S R56 LCI N18 1.6 184HP Engine Control Unit ECU DME 8610006 Manual

€427.95

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Mercedes W204 Fuse Box Relay Control Unit SAM Module A2049000600

€265.95

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Safety Control Unit BMW F01 LCI F07 F10 F11 F25 Air Module Bag ECU 9350003

€23.95

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Part no. DH52-10C652-AC

Land Rover FREELANDER 2 L359 Battery Cable Wire DH52-10C652-AC

€23.95

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Audi A4 B7 2.0 TDI BPW 140HP Engine ECU Kit Ignition + Key 03G906016KN Manual

€113.95

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Part no. 4K1907594CB

Audi S3 8Y VW Golf Mk8 Sun Roof Module Control Unit ECU 4K1907594CB

€75.95

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Part no. 7561834-23

BMW Z4 E85 2.0i N46 150HP Engine Control Module Unit Kit DME ECU 7561834 Manual

€284.95

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Audi A5 8F Door Speaker Tweeter Front Left N/S 8F0035399

€23.95

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Mercedes C207 E350 CDI BlueEfficiency OM642.836 Engine Module ECU A6429002900

€132.95

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BMW X5 E70 X6 E71 Battery Earth Cable Ground - Pole Lead L= 490MM 9188853

€28.95

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BMW E39 Petrol M52 523i Body Control Module 8381963

€23.95

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BMW 5 6 Series E60 E61 E63 R55 R56 Sensor B-pillar Airbag 65776977398 6977398

€23.95

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Part no. 9345322

BMW F10 LCI ECU Body Control Module V2 Junction Box PL6 JBBFE III 9345322

€23.95

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Part no. 8C1T18K931AD

Ford Transit Mk7 V Radio CD Multimedia Player Head Unit ECU 8C1T-18K931-AD

€332.95

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Part no. A1698208626

Mercedes-Benz A B W169 W245 Door Control Module Right Rear O/S A1698208626

€23.95

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BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8506444 CAS3 + Key

€256.95

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Honda CBR F3 Battery Box Tray Covering Housing Trim Holder Bracket 50325-MAL-600

€23.95

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Audi A6 C7 A7 4G Onboard Supply BCM Body Control Module Unit ECU 4H0907063GG

€189.95

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Part no. AV6N-15K607-AH

Ford Focus Mk3 Motion Alarm Sensor Module Unit AV6N-15K607-AH

€23.95

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BMW E88 Cabrio Footwell Light Module Control Unit ECU BASIS PL2 FRM3R 9251487

€170.95

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Range Rover L405 448DT Diesel Fuse Box Cover Lid Panel Top CK52-14K016-AA

€28.95

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Land Rover Range Rover L405 Air Quality Sensor CPLA-19E906-AA

€23.95

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Part no. 8585375-1

BMW F06 Gran Coupe 640d N57Z 313HP Engine Control ECU Kit 8585375 Automatic

€360.95

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Audi TT 8J A3 8P Windscreen Wiper Stalk Switch Assembly 8P0953519G

€23.95

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BMW F01 F07 Boot Trunk Lid Tailgate Lock Wiring Harness Loom Cable 969713

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Part no. 8513155

Mini Cooper One D F55 F56 B37 Cable Alternator Starter Base 8513155

€23.95

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Mini Cooper R50 R52 Engine Starter Generator Wiring Cable BOSCH 7534704

€23.95

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BMW F10 F11 F12 EMF Module Parking Brake Unit Electric Control 6854856

€32.95

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Part no. 9285505

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

€23.95

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Part no. 8574372-3

BMW F30 330d F32 430d N57N 258HP Engine Unit ECU Kit DDE 8574372 Key FEM

€213.95

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Gearbox Wiring BMW F87 M2 N55 Engine Automatic Loom Harness Cables 7853460

€94.95

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Part no. 7188487

BMW E93 Convertible Battery Mounting Bracket Clamp Bolt Holder Mount 7188487

€23.95

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Part no. A2188201926

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

€89.95

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Part no. A1645400624

Mercedes W164 Fuse Box Relay Housing Cover A1645400624

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BMW X5 E70 CCC Navigation System CD Player Sat Nav Head Unit 9170732

€384.95

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Skoda Fabia 5J Front Door Bass Loudspeaker Left Right N/O/S 5J0035411C

€23.95

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Rear Tailgate Sensor BMW F40 F44 F48 Mini F54 LCI Smart Opener Bottom 8494949

€42.95

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Audi A6 C6 Rear Door Left N/S Module Unit Control ECU 4F0959795E

€23.95

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Part no. A6401500434-1

Mercedes W169 A160 CDI OM640.942 82HP Engine Unit ECU Kit A6401500434 Automatic

€227.95

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Audi A4 B8 Door Module Front Right O/S Control Unit Module ECU 8K0959793J

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Part no. 3D0937499B

Volkswagen VW Phaeton 3D Fuse Box Electrical Control Unit Module 3D0937499B

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Porsche Cayenne 9PA Rear Door Treble Speaker Audio Unit Left N/S 7E0035411B

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VW Volkswagen Transporter T6 Double USB-C Port Socket Control Unit 2G6035736

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Volkswagen Caddy 2K Mk2 Sliding Door Wiring Loom Harness 2K5971692

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Interface Control Module BMW F10 F20 F30 Bus Unit 120 OHM 6807395

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Audi A4 B8 Q7 4L GPS Vehicle Tracking Location Control Unit Module 8K0907440A

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BMW F10 F11 530d N57 245HP Engine Control Unit ECU Kit DDE 8513161 CAS4 2 Keys

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Audi A5 8T Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104Q

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BMW X5 7 Series E38 E53 Control Unit Illuminated Door Handle 8383185

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BMW 3 Series E93 E93N LCI Aerial Antenna Amplifier FM/AM Right O/S 6968650

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Part no. A9079003207

Mercedes W907 Air Suspension Level Control Unit Module Airmatic A9079003207

€142.95

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Mercedes W204 W212 W176 Media Interface Control Unit Module A1729006008

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Mercedes Sprinter W906 Battery Cable Negative Lead Wiring Harness A9065400041

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Part no. 9T16-14B296-AA

Ford Transit Connect Yaw Sensor ESP Rotation Rate Control Unit 9T16-14B296-AA

€51.95

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BMW E93 ECU Body Control Module Unit PL2RR JBBFE IIIR H3 Junction Box 9227186

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Audi A6 C6 Rear Door Wiring Harness Cable Loom Left Right N/O/S 4F1971693G

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Showing 5644-5742 of 14021 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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