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.

More information

Make

Category

Subcategory

Condition

In Stock

Price

Products in promotion

Part no. 03C907309E

Volkswagen Passat B7 CAXA 122HP ECU Engine Control Unit Automatic 03C907309E

Product currently unavailable

Part no. 059903015R

Alternator Audi A6 C6 3.0 TDI Diesel Engine Generator 059903015R 1068673

Product currently unavailable

Part no. 7N0880742

Volkswagen Sharan 7N Head Air Module Roof Side Curtain Right O/S 7N0880742

Product currently unavailable

Part no. 7L0907401F-1

Volkswagen Touareg 3.0 TDI BKS 225HP Engine Control Unit ECU Kit 7L0907401F Key

Product currently unavailable

Part no. 6R0971349AH

VW Polo MK5 1.2 TDI CFWA Alternator Wiring Starter Motor Harness 6R0971349AH

Product currently unavailable

Part no. 06J903023G-1

VW Volkswagen Polo Gti 6R Golf Mk7 Alternator Generator 14V 140A 6J903023G

Product currently unavailable

Part no. 02Z911021C

Volkswagen Polo 6C Starter Motor Actuator 1.4 TDI Diesel Engine 02Z911021C

Product currently unavailable

Part no. 06F903023J

Audi A4 B7 Alternator Generator 2.0 TDI BRE Engine 06F903023J

Product currently unavailable

Part no. 03G972619KP

Volkswagen VW Touran 2.0 TDI BKD Engine Wiring Harness Loom Cable 03G972619KP

Product currently unavailable

Part no. 04E907309AF

Volkswagen Polo 5 6R 1.2 TSI CJZC 90HP ECU Engine Control 04E907309AF

Product currently unavailable

Part no. 7N0907530S

VW Volkswagen Sharan 7N Gateway Control Unit Module ECU 7N0907530S

Product currently unavailable

Part no. 6Q0909605AL

Volkswagen New Beetle Air Module Control Unit Sensor ECU 6Q0909605AL

Product currently unavailable

Part no. 5K0937087AD

Volkswagen Touran 1T Scirocco III BCM Body Control Module Unit ECU 5K0937087AD

Product currently unavailable

Part no. 059911024J-1

Volkswagen Touareg 7L 3.0 TDI Diesel Engine Starter Motor 059911024J

Product currently unavailable

Part no. 5K0937084H

Volkswagen Sharan 7N Fuse Box Module Comfort BCM Control Unit ECU 5K0937084H

Product currently unavailable

Part no. 7N0843639

Volkswagen Sharan 7N Sliding Door Locking Catch Plate Left N/S 7N0843639

Product currently unavailable

Audi Volkswagen Seat Skoda Petrol Alternator Generator 14V 140A 06J903023D

-40%

Part no. 06J903023D

Audi Volkswagen Seat Skoda Petrol Alternator Generator 14V 140A 06J903023D

Product currently unavailable

Part no. 7N0843638

Volkswagen Sharan 7N Sliding Door Catch Upper Locking Plate Right O/S 7N0843638

Product currently unavailable

Part no. 06K907425B-13

Volkswagen Golf VII R 2.0TSI CJXC 300HP Engine Control ECU Kit 06K907425B Manual

Product currently unavailable

Part no. 7N0906093

Fuel Pump Module VW Volkswagen Sharan 7N Fuel Sender Control Unit ECU 7N0906093

Product currently unavailable

Part no. 03F971612

VW Volkswagen Polo 1.2 TSI CBZB Engine Wiring Harness Cable Loom 03F971612

Product currently unavailable

Part no. 1Y0959255C

Volkswagen New Beetle Convertible Roof Control Module Control Unit 1Y0959255C

Product currently unavailable

Part no. 0AH911023A

VW Volkswagen Touran 1T 1.2 TFSI CBZB Starter Motor 0AH911023A

Product currently unavailable

Part no. 02Z911023E

Volkswagen New Beetle 1.4 TSI Petrol Engine Starter Motor 02Z911023E

Product currently unavailable

Part no. 6Q1937049B

VW Polo 9N Seat Body Control Comfort Unit Module BCM Convenience Unit 6Q1937049B

Product currently unavailable

Part no. 06F903023HX

Volkswagen Golf Mk5 2.0 TFSI Petrol Alternator Generator 06F903023HX

Product currently unavailable

Part no. 5Q0915181G

Volkswagen VW Golf Mk7 Negative Battery Terminal Cable Wiring 5Q0915181G

Product currently unavailable

Part no. 04C903021A

Volkswagen Golf Sportsvan 1.5 TSI Alternator Valeo 14V 140A 04C903021A

Product currently unavailable

Part no. 6R0971349Q

Battery Cable VW Polo 6R Positive Alternator Starter Wiring B+ 6R0971349Q

Product currently unavailable

Part no. 03G906016HJ

Volkswagen Golf 5 2.0 TDI Engine Control Unit ECU Manual 03G906016HJ

Product currently unavailable

Part no. 070906016BT-1

VW Volkswagen Touareg 2.5 TDI BPE Engine Control Unit ECU Kit 070906016BT Key

Product currently unavailable

Part no. 070911023C

Volkswagen Touareg Diesel Engine Starter Motor Actuator Starter 070911023C

Product currently unavailable

Part no. 3AA919475N

Volkswagen Passat B7 PDC Parking Assistant Module Control Unit 3AA919475N

Product currently unavailable

Part no. 022911024K

Volkswagen VW Golf V 1.6 TDI Diesel Engine Starter Motor 022911024K

Product currently unavailable

Part no. 1K0907115F-1

Volkswagen Golf 5 GTI 1K 2.0 TFSI 200HP Engine Ecu Kit 1K0907115F Key Ignition

Product currently unavailable

Part no. 03G906021PD

VW Caddy 1.9 TDI BLS 105HP Engine Control Unit Module ECU 03G906021PD Manual

Product currently unavailable

Part no. 03L907425C

VW Passat Variant PA 1.6 TDI Diesel Blue Motion Engine Control ECU 03L907425C

Product currently unavailable

Part no. 045903143E

VW Volkswagen Polo 9N 1.4 TDI Alternator Bracket Mount Carrier 045903143E

Product currently unavailable

Part no. 03D903025J-1

Seat Ibiza Volkswagen Polo Mk5 6R 1.2 Petrol Alternator Generator 03D903025J

Product currently unavailable

Part no. 39120-2A051

KIA CEED I 1.6 CRDI Diesel Engine Control Module ECU 39120-2A051 Manual

Product currently unavailable

Part no. 7N0959655C

Volkswagen Sharan 7N Air Module ECU Sensor Control Unit 7N0959655C

Product currently unavailable

Part no. 2D0911253

VW Volkswagen LT 35 Glow Plug Module Relay Control Unit Black 2D0911253

Product currently unavailable

Part no. 3C8035730

VW Volkswagen Tiguan 5N Bluetooth Interface Control Module ECU 3C8035730

Product currently unavailable

Part no. 6Q0937517

VW Polo 9N Battery Terminal Fuse Distribution Cable Cover Power Board 6Q0937517

Product currently unavailable

Volkswagen Golf VI Passat B6 Tiguan Starter Motor Diesel Engine 02M911024Q

-5%

Part no. 02M911024Q

Volkswagen Golf VI Passat B6 Tiguan Starter Motor Diesel Engine 02M911024Q

Product currently unavailable

Part no. 070903143C

Volkswagen Touareg 7L Alternator Mounting Bracket Carrier Holder 070903143C

Product currently unavailable

Volkswagen New Beetle 1.4 TSI Petrol Engine Alternator Motor 14V 110A 03C903023F

-15%

Part no. 03C903023F

Volkswagen New Beetle 1.4 TSI Petrol Engine Alternator Motor 14V 110A 03C903023F

Product currently unavailable

Part no. 1K0959433AJ

Volkswagen Golf Mk5 V Body Control Comfort Unit Module 1K0959433AJ

Product currently unavailable

Volkswagen Polo 6R BCM Body Comfort Control Module Unit ECU 6R0937085B

-15%

Part no. 6R0937085B

Volkswagen Polo 6R BCM Body Comfort Control Module Unit ECU 6R0937085B

Product currently unavailable

Part no. 03D906023Q

Volkswagen Fox 1.2 Petrol CHFB 55HP Engine Control ECU Manual 03D906023Q

Product currently unavailable

Part no. 074906018BD

VW Volkswagen LT 35 BBF 95HP Engine Control Unit Module ECU 074906018BD Manual

Product currently unavailable

Part no. 5N0971228D

Volkswagen Tiguan 5N Battery Lead Positive Cable Plus Pole Wiring 5N0971228D

Product currently unavailable

Part no. 3c0937125

Volkswagen VW Passat B6 Fuse Box Relay Electrical Module Unit 3C0937125

Product currently unavailable

Part no. 074903025K

Alternator Volkswagen LT35 2.5 TDI Diesel Engine Alternator 90A Bosch 074903025K

Product currently unavailable

Part no. 028903028C

Volkswagen Golf Mk4 Alternator Generator BOSCH 14V 70A 028903028C

Product currently unavailable

Part no. 03P971612

VW Volkswagen Polo 5 1.2 TDI Engine Wiring Harness Loom Cable 03P971612

Product currently unavailable

Part no. 7L6035191R

VW Volkswagen Touareg 7L Radio Player Navigation Sat Nav Head Unit 7L6035191R

Product currently unavailable

Part no. 2N0971068

VW Volkswagen Crafter 1 Wiring Loom Harness Cable 2N0971068

Product currently unavailable

Part no. 037906024BE

VW Golf 3 GTI 2.0 16V ABF 150KM Petrol Manual Engine Unit Module ECU 037906024BE

Product currently unavailable

Part no. 0AM911023F

Volkswagen Polo 6R Engine Starter Motor Assembly Unit 0AM911023F

Product currently unavailable

Part no. 3C8937049D

VW Volkswagen Touran Body Control Comfort Unit Module BCM 3C8937049D

Product currently unavailable

Part no. 1C0971235A

Volkswagen New Beetle Earth Ground Cable Negative Battery Lead Wiring 1C0971235A

Product currently unavailable

Part no. 1K0953549CF

VW Volkswagen Golf MK6 Steering Wheel Column Control Module 1K0953549CF

Product currently unavailable

Part no. 2D0959800

Volkswagen LT 35 Door Module Central Locking System Module Unit 2D0959800

Product currently unavailable

Part no. 7N0907530C

VW Volkswagen Golf 6 Gateway Control Unit Module ECU 7N0907530C

Product currently unavailable

Part no. 074906018BK

VW Volkswagen LT 35 2.5 TDI AVR 109HP Engine ECU Kit 074906018BK Manual Gearbox

Product currently unavailable

Part no. 038903143AG

VW Polo 9N MK4 Fabia II 1.4 TDI BMS Alternator Mount Support Bracket 038903143AG

Product currently unavailable

Part no. 5N0035342B

VW Volkswagen Touran Golf Polo Interface Module Multimedia Control 5N0035342B

Product currently unavailable

Part no. 03L903023P-1

Volkswagen Crafter 2E 2.0 TDI Diesel Engine Alternator 03L903023P

Product currently unavailable

Part no. 1K0937049N

Volkswagen Golf Mk5 Body Control Comfort Unit Module BCM 1K0937049N

Product currently unavailable

Part no. 1K0953549F

VW Volkswagen Golf MK5 Steering Wheel Column Control Module Unit 1K0953549F

Product currently unavailable

Part no. 1J0035505A

Volkswagen Polo 6N Aerial Roof Antenna Base Antenna Unit 1J0035505A

Product currently unavailable

Part no. 070903024B

Volkswagen Touareg Transporter 2.5 TDI Alternator Generator 14V 180A 070903024B

Product currently unavailable

Part no. 7H0959433B

Volkswagen Transporter T5 Body Control Comfort Unit Module BCM 7H0959433B

Product currently unavailable

Part no. 03C903023G-1

Audi Seat Skoda Volkswagen 1.4 TSI Petrol Alternator Generator 110A 03C903023G

Product currently unavailable

Part no. 03G906021MP

VW Volkswagen Touran TDI Diesel Engine Control Unit ECU 03G906021MP

Product currently unavailable

Part no. 03L907309

VW Volkswagen Crafter 2.0 TDI CKTB 109HP Engine ECU Kit 03L907309 Manual Gearbox

Product currently unavailable

Part no. 1K0971121CN

VW Volkswagen Golf 1K 5D Front Door Wiring Loom Harness Left N/S 1K0971121CN

Product currently unavailable

Part no. 028903028E

Alternator Volkswagen Crafter 2.0 TDI Engine Alternator 120A Bosch 028903028E

Product currently unavailable

Part no. 1K0035186AF

Radio CD Player VW Volkswagen Golf 5 Passat B6 Head Unit MP3 RCD 300 1K0035186AF

Product currently unavailable

Part no. 045903023A-1

VW Polo 4 9N 1.4 TDI Seat Skoda Diesel Engine Alternator Generator 045903023A

Product currently unavailable

Volkswagen Polo 6N Alternator Generator BOSCH 14V 70A 028903025G

-15%

Part no. 028903025G

Volkswagen Polo 6N Alternator Generator BOSCH 14V 70A 028903025G

Product currently unavailable

Part no. 1K0035186R

Radio CD Player VW Volkswagen Golf 5 Passat B6 Head Unit 1K0035186R

Product currently unavailable

Starter Motor Volkswagen VW Golf VI Passat B6 Tiguan Diesel Engine 02M911024

-15%

Part no. 02M911024

Starter Motor Volkswagen VW Golf VI Passat B6 Tiguan Diesel Engine 02M911024

Product currently unavailable

Part no. 1K0909605R

Volkswagen Golf Mk5 Seat Skoda Air Control Module Unit 1K0909605R

Product currently unavailable

Part no. 7L6959933

Volkswagen Touareg 7L Control Comfort Unit Module Unit ECU 7L6959933

Product currently unavailable

Part no. 5H4971162MP

Volkswagen Golf CD1 Front Door Right O/S Loom Wiring Cable Harness 5H4971162MP

Product currently unavailable

Part no. 3C8959760E

Volkswagen VW Passat B7 Driver's Seat Control Unit Module ECU 3C8959760E

Product currently unavailable

Part no. 3D0909610B

VW Volkswagen Phaeton 3D Rear Tailgate Boot Lid Control Module Unit 3D0909610B

Product currently unavailable

Part no. 0001123044

Volkswagen VW Golf VI Passat B6 2.0 TDI Diesel Engine Starter Motor 0001123044

Product currently unavailable

Part no. 6R0971537F

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6R0971537F

Product currently unavailable

Part no. 038906016AJ

VW Volkswagen Transporter T5 1.9 TDI Diesel Engine Control Unit ECU 038906016AJ

Product currently unavailable

Part no. 6R0971235C

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6C0971235A

Product currently unavailable

Part no. 05E903018G

Volkswagen Golf CD1 Alternator Engine Generator Valeo 05E903018G

Product currently unavailable

Part no. 03L972619BA

Volkswagen Golf MK6 Parking Sensor Wiring Rear Bumper Loom Cable 03L972619BA

Product currently unavailable

Part no. 3D0941329

Volkswagen VW Golf Mk7 Headlight Cornering Module Control Unit 3D0941329

Product currently unavailable

Part no. 5Q0959655D

Volkswagen Golf Mk7 Air Module Control Unit ECU 5Q0959655M

Product currently unavailable

Part no. 022911023H

Volkswagen VW Golf V 1.9 TDI Diesel Engine Starter Motor Unit 022911023H

Product currently unavailable

Part no. 6R0919475C

VW Volkswagen Polo 6R PDC Parking Sensor Control Unit Module 6R0919475C

Product currently unavailable

Showing 298-396 of 512 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 .

used parts volkswagen car parts mercedes used car parts cheap car parts audi auto parts spare parts genuine used audi parts bmw starters, alternators, ecus & wiring mercedes starters, alternators, ecus & wiring mini starters, alternators, ecus & wiring audi starters, alternators, ecus & wiring volkswagen starters, alternators, ecus & wiring