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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Audi A3 8V Body Control Comfort Unit Module BCM Unit ECU 5Q0937084AJ
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Audi Q7 4M Electric Alternator Starter Positive Wiring Harness Cable 4M0971349Q
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BMW F12 F13 F20 F21 Alternator Generator 14V 210A N55 Petrol Engine 7591529
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Audi A5 8T Body Control Comfort Unit Module BCM Unit ECU 8K0907064EB
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Mercedes SL R231 Roof Module Controller ECU A2319006905
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Mini Cooper R56 LCI R58 N16 1.6 122HP Engine ECU Kit DME 8625068 CAS 3 + Key
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BMW X3 E83 E46 E60 E61 E65 Alternator Generator 150A 7521137
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Display Screen Peugeot Partner Expert Multifunction Dashboard Clock 9665614680
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VW Volkswagen Golf 7 Front Door Control Module Passenger Side Unit 5Q0959392D
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Mercedes-Benz C-Class W203 M111 C 180 C 200 K Engine Starter Motor A0051515301
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BMW X3 F25 Tailgate Trunk Lid Wiring Harness Rubber Cover Right O/S 9285768
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Volkswagen Crafter 2E 2.0 TDI Diesel Engine Alternator 03L903023P
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Audi A4 B8 A5 8T Gateway Diagnostic Interface Control Unit Module ECU 8T0907468R
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VW Volkswagen Polo 6R 1.4 TSI Petrol Alternator Wiring Harness Loom 6R0971349AP
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VW Volkswagen Transporter T5 Golf Mk4 Fuel Pump Relay Unit Grey 109 1J0906381A
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Mercedes CLK W209 Fuse Box Relay Control Unit Module SAM Fuse Box A2095450001
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Mercedes S204 Door Module Rear Left N/S Control Unit ECU A2048701126
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Audi A4 B8 A5 8F 2.0 TDI Diesel Engine Alternator Generator 04L903017D
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Audi A7 4G8 Westfalia Towing Hitch Module Control Unit 506737
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BMW F80 M3 F82 F83 M4 S55 431HP Engine Unit Module ECU DME 8679840 Drivelogic
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Audi A8 4D Front Seat Memory Adjustment Module Unit Right O/S 4H0959760D
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BMW F30 330d N57N 258HP Diesel Engine Unit ECU Kit DDE 8585379 Key Automatic
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Mercedes Vito W447 Battery Cable Alternator Wiring Diesel OM651 A4475400600
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VW Volkswagen Phaeton Mk1 Battery Negative Terminal Wire Cable 3D0971235AD
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Mercedes W203 Gearbox Transmission Control A0325451232
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BMW 7 Series E65 E66 Diversity Antenna Tuner Amplifier 6933575
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Audi A3 8V 1.6 TDI CLHA 105HP Engine Unit ECU Kit 04L907309B Key Ignition
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Land Rover Freelander Ford Mondeo Focus Airbag Crash Impact Sensor 3M5T14B342AB
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3 x BMW E88 E89 E93 Convertible Cabrio DWA Alarm System Module 6989713
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Mercedes X253 Steering Wheel Contact Switch Control Plate A0994644206
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Seat Adjustment Motor Mercedes W221 Front Seat Motor Actuator 0390203255
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Mercedes C238 Rear Control Unit Module Bracket Holder Trim Panel A2385452700
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BMW F01 F07 Boot Trunk Lid Tailgate Lock Wiring Harness Loom Cable 969713
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Mercedes R172 R231 Headlight LED Ballast Control Unit Module A1769009203
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BMW i4 G26 Fuse Box Front Body Control Module ECU BCM Unit 5B31359
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Mercedes Vito W447 Battery Cable Alternator Wiring Diesel OM651 A4475400010
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BMW F30 Fuse Box Relay Control Unit Module 9314235
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Mercedes-Benz C E W203 W210 200 220 CDI Transmission Control Unit Module ECU
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Audi A4 B8 Body Control Comfort Unit Module BCM Convenience Unit 8K0907064EC
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Alternator BMW G11 G12 LCI G20 G21 G30 G31 Alternator 250A Denso 8634167
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Airbag Module Mercedes C118 W177 W247 Front Air Bag Control Unit ECU A1779005513
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Seat Ibiza FR KJ1 Fuse Distribution Box Electrical Control Unit 2Q0937548D
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Mercedes W177 W243 W247 Door Wiring Cable Harness Loom Driver Side A1775408101
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Mercedes Sprinter W901 W638 Fuse Box Relay Control Unit Module A0005400650
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BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A 7542529
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BMW E60 E90 325i 525i N52 218HP ECU Module Kit DME 7567178 CAS3 Key Automatic
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Mercedes W168 Battery Support Holder Front Mount Bracket A1686100336
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Varta Accumulator Battery 80Ah 800A 12V Silver Dynamic AGM F21
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Mercedes W177 A200 M282.914 163HP Engine Control Unit Module ECU A2829003200
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VW Touareg 7L Body Control Comfort Unit Module STG Convenience ECU 7L0959933H
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Seat Wiring BMW F45 X1 F48 Mini F55 F56 Passenger's Side Sensor Cable 9364552
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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 .