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 Q3 8U 2.0 TDI Fuel Pump Sender Control Relay Module Unit ECU 5Q0906121F
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Audi A8 4E S8 D3 Comfort Unit Control Module 4E0907289E
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Parking Distance Audi A3 8V TT Mk3 Seat Leon MK3 Control Module 5Q0919283E
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Audi A3 8V Body Control Comfort Unit Module BCM Unit ECU 5Q0937084AJ
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Audi A3 8V Air Module Control Unit SRS System ECU 5Q0959655A
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Ford Transit Custom Rear Bumper Parking Sensor Wiring Harness Loom BK2T15K867DC
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Mercedes W221 Front Door Control Left N/S Module Unit ECU A2219007301
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Mercedes W221 S350 BlueTEC OM642.862 Engine ECU Kit Ignition + Key A6421508900
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Skoda Octavia 3 5E Front Bumper Wiring Harness Loom 5E0971095CN
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Mercedes W221 Fuse Box Control Unit SAM Module Relay A2219013000
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Positive Cable BMW Z4 E89 Convertible Battery Plus Pole Power Red 9249103
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BMW Z4 E89 Roadster Cabrio Convertible Top Module CTM 09264978
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Mercedes W221 Cover Fuse Box Case Trim Panel Lid A2215401682
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Parktronic Module Mercedes W221 W216 Parking Sensor Control Unit A2219009202
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Audi RS4 B8 Front Bumper PDC Wiring Park Assist Sensor Harness 8K0971095G
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Audi A3 8V Gateway Control Module Unit ECU 5Q0907530S
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BMW Z4 E89 LED Footwell Control Module ECU 9286885
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BMW Z4 E89 20i N20 184HP Petrol Engine ECU Kit CAS3 + Keys 8661466 Automatic
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Alternator BMW F87 M2 F80 M3 F82 F83 M4 S55 Engine Generator 250A Denso 7848603
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Volkswagen Golf Mk5 2.0 TFSI Petrol Alternator Generator 06F903023HX
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Audi A4 B9 Voltage Converter Module Auxiliary Battery Unit 8W0915101A
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BMW Z4 E89 23i N52N 204HP sDrive Engine ECU Kit CAS3 + Key 7624048 Manual
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Audi RS3 8V Potential Power Distribution Junction Box Jump Point 1K0937517
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BMW E89 Max Brose Footwell Light Module Control Unit ECU FRM3R 9249086
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Audi RS3 8V PDC Parking Distance Control Sensor Module Unit ECU 5Q0919294K
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Audi A1 8X Starter Motor Petrol Engine Electrical Unit Actuator 02M911024J
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Audi A1 8X Air Module Control Unit Sensor 8X0959655B
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Audi A1 8X Fuse Relay Box Electrical Control Unit Module 8X0937124
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Audi RS3 8V Front Windscreen Rain Light Solar Sensor Unit 8U0955559C
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Negative Battery Cable Audi A1 8X Volkswagen Polo Mk5 6R Cable 6R0971228S
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Audi A3 RS3 8V AMR Module Rear Suspension Damper Control Unit 8V0907376E
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Audi A1 8X Multimedia Radio CD Player Navigation Head Unit 8X0035183
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Mercedes W166 Front SAM BCM Control Unit Module CBC V4 ECU A1669006020
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Audi A1 8X Positive Battery Overload Protection 8X0915459
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Mercedes GLE250 W166 OM651.960 204HP Engine ECU Kit Ignition + Key A6519004201
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Volkswagen Touareg Transporter 2.5TDI Alternator Coupling Sleeve Belt 070903327C
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Volkswagen Touareg Transporter 2.5 TDI Alternator Generator 14V 180A 070903024B
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BMW F80 M3 F82 M4 S55 431 HP Engine Control Unit ECU DME 8645445 Dual Clutch
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Mercedes Vito W639 OM651.940 136HP 113 CDI Engine ECU Kit A6511501879 Keys+Lock
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BMW 3 Series F30 F80 Boot Trunk Lid Tailgate Wiring Loom Harness Cable 9260012
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Mercedes Vito W639 Automatic Gearbox EGS53 Control Unit Module ECU A0009001700
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Volkswagen Golf Sportsvan Fuse Box Engine Compartment Relay Unit 5Q0937125B
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Mercedes GLE 250 AM Tailgate Trunk Control Module Unit A1669008512
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Mercedes W166 Radio Sat Nav CD Multimedia Control Central Head Unit A1669005420
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VW Volkswagen Golf SV Gateway Control Unit Module ECU GW MQB High 3Q0907530L
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VW Volkswagen Golf SV Online Services Module Control Unit ECU 5NA035284B
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VW Volkswagen Golf Sportsvan Multimedia Sat Nav Radio Display Screen 5G6919605B
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VW Volkswagen Golf 1K 5D Front Door Wiring Loom Harness Left N/S 1K0971121CN
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Mercedes W238 Coupe Convertible Module Control Unit ECU A2059001336
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Audi RS4 B8 Body Control Comfort Unit Module BCM Unit ECU 8K0907064JJ
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BMW F20 Radio Professional CD Player Control Module 9335351
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Mercedes A238 Convertible Folding Top Roof ECU Module Control Unit A2389000501
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Mercedes W213 Alternator Generator 200A 14V A0009063003
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VW Golf 5 V 1K Fuse Box Control Unit Relay Power Distribution Module 1K2941824
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VW Golf V 5 1K Roof Top Antenne Control Unit Module 1K0035507F
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Volkswagen Golf Mk5 1K GTI 2.0 TFSI BWA 200HP Engine ECU 1K0907115F Manual
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Mini Cooper R50 W10 116HP Engine Control Unit ECU Kit DME 7557395 Key EWS
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Mercedes Sprinter W906 OM651 Engine Wiring Harness Cable Loom A9065402727
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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 .