Automotive electrical systems
More informationAt 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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Mercedes W204 SAM Module Fuse Box Relay Control Unit A2129005722
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Mercedes W207 Connection Media Interface Cable AUX Wire A0018276604
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Audi A3 8P Starter Motor Engine Diesel Actuator Unit 02A911023 LRS00791
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BMW E81 E82 E87 LCI E88 N47S 123d ECU Kit DDE 7812502 + CAS3 + Key Automatic
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Vauxhall Combo Fiat Punto 1.3 Diesel Starter Motor 51810307A152
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Crash Impact Sensor Mercedes C118 W177 W247 Front Acceleration Unit A1679052401
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BMW 3 F30 LCI 330e B48X HV Accumulator Battery Positive Cable Wiring 7544895
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Mini Cooper S R52 R53 W11 170HP Engine Control Unit Module ECU 7557395 Automatic
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FEM Module BMW F20 F21 F22 F30 F32 ECU Control Unit Fuse Box 9286113
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Mercedes-Benz C CLK W202 W208 Electrical Fuse Relay Box Storage A2085400150
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Audi Q2 GA Online Services Control Module ECU Control Unit 5WA035282
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Mercedes W245 B170 M266 Engine Control ECU Kit A2661538879 Key Lock Automatic
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Mercedes R171 SLK 200 M271.954 Engine Control Unit ECU Kit A2711536091 Key Lock
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BMW E61 E61N LCI Antenna Amplifier Diversity 868 MHZ 9183564 6985531 6934478
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Mercedes W447 Comfort Control Unit Module A4479009509
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Engine Wiring Mini F56 Cooper S B46 B48 Valvetronic Cable Loom Harness 8617703
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BMW E82 Front Headlight Lamp Module Footwell Unit Lear FRM3R PL2 ECU 9263796
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BMW 3 Series E90 E91 E92 330d M57N2 Diesel Manual Engine Wiring Loom Harness
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Head Unit Mercedes Sprinter W906 Radio Cd Player Unit A9068200086
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BMW E60 E90 330d 530d M57N2 ECU Engine ECU Kit DDE 7801712 CAS2 + Key Automatic
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Head Unit Mercedes GLA X156 Radio CD Player Sat Nav Tel Media Unit A2469009612
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Mini Cooper F56 136HP Petrol B38 Engine Control ECU DME 8638785 Manual
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BMW E60 E87 E90 M47N2 120d 320d 520d ECU Kit DDE 7803373 CAS3 Key
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BMW F48 20dX B47D 190HP Engine Control Unit ECU Kit DDE 8595429 BDC Key
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VW Tiguan 5N 2.0TDI 4motion 140HP CBAB Engine Control Unit 03L906022G Automatic
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Ford Transit Mk8 Alternator Generator Unit 220A 2.0 Diesel Engine 6CIT-10300-BC
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Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205
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Mercedes ML W164 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1644400937
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Mercedes R231 Electronic Control Unit Module A2319003705
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BMW F30 LCI B48X 330e Hybrid Electric High Voltage Battery 8677631
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Audi A3 8V Multimedia Display Screen Radio Sat Nav Head Unit 8V0857273H
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Radio Head Unit Mercedes C117 W176 W246 Navi CD Player Navigation A2469000112
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Mini Cooper R60 R61 N16 122HP Engine Control Unit ECU DME 8652745
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Mercedes W221 Parking EPB Hand Brake Actuator Module Control Unit A2214302449
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Audi A4 B9 2.0 TFSI CVKB Petrol Engine Starter Motor 06L911021
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Audi TT 8J Body Control Comfort Unit Module BCM Unit 8J0959433
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BMW X5 E53 3.0i Petrol M54 Alternator Valeo 140A 7551252
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Audi A4 B6 4.2 BBK Petrol Engine Alternator Generator 079903021D
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Mercedes W447 114 CDI OM651.950 Engine Control Unit ECU Kit A6519002803 Keys
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Audi S4 B6 4.2 V8 BBK Quattro 344HP Engine Control Module ECU 8E0910560J Manual
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Radio Player Mercedes W204 COMAND Navi CD Head Unit A2048700196
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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 .