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. 8715339-1

Dashboard Monitor BMW G30 G31 Onboard Central Display Screen 10,25" 8715339

Product currently unavailable

Part no. 7549387-3

BMW E60 525i M54 192HP Engine Control ECU Kit DME 7549387 CAS2 Key Automatic

Product currently unavailable

Part no. 7P0915105

Audi Volkswagen Varta Car Battery Accumulator AGM 12V 68Ah 680A 7P0915105

Product currently unavailable

Part no. 6942693-1

Light Module BMW X5 E53 Check Control Unit ECU Lear LCM IV AUTO.LWR 6942693

Product currently unavailable

Part no. A1729008412

Mercedes SLK R172 Roadster Folding Vario Roof Control Module A1729008412

Product currently unavailable

Part no. 8518424-5

BMW F20 F30 118d 318d N47N 143HP Engine ECU Kit DDE 8518424 FEM + Key Manual

Product currently unavailable

Part no. 05C907309F

Seat Ibiza 6J FR 1.0 TSI DUSA 115HP Engine Control ECU Kit 05C907309F Manual

Product currently unavailable

Part no. 7586940-3

BMW E60 LCI 525i E90 E91 325i N53 218HP ECU Kit DME 7586940 CAS3 + Keys Manual

Product currently unavailable

Part no. 9476858

Airbag Module BMW G20 G21 SRS Control Unit Module ECU 9476858

Product currently unavailable

Part no. 9349908

BMW i3 I01 Door Wiring Front Right O/S Door Cable Harness Wiring 9349908

Product currently unavailable

Part no. 9364819-2

BMW E92 ECU Body Control Module M Junction Box PL2RR JBBFE IIIR 9364819

Product currently unavailable

Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

Product currently unavailable

Part no. 5Q0971845

Volkswagen VW Golf Mk8 OBD Diagnostic Socket Loom Cable Plug Wiring 5Q0971845

Product currently unavailable

Part no. 8591073-10

BMW F20 F30 LCI 118d 318d B47 Engine ECU Control Unit DDE 8591073 Automatic

Product currently unavailable

Part no. A1729050151-1

Roof Towing Alarm Mercedes W176 W246 Emergency Sensor Switch White A1729050151

Product currently unavailable

Part no. 3Q0959435

Audi TT FV Entry Keyless Kessy Control Module Unit ECU 3Q0959435

Product currently unavailable

Part no. 9311564

BMW F12 Convertible Folding Top Roof ECU Module Control Unit CVM 9311564

Product currently unavailable

Part no. 7588502-7

Mini Cooper R55 R56 N12 1.6 120HP Engine ECU Kit DME 7588502 CAS3 Key Automatic

Product currently unavailable

Part no. A6511501390

Engine Wiring Mercedes W176 W246 Diesel OM651 Loom Harness Cable A6511501390

Product currently unavailable

Part no. 7555361-7

BMW E60 E61 E90 E91 330i 530i Petrol N52 ECU Kit DME 7555361 CAS2 Key Automatic

Product currently unavailable

Part no. YUASA Silver 5000 80Ah Accumulator

YUASA Silver 5000 12V Accumulator Battery 80Ah 760A HSB019

Product currently unavailable

Part no. 1734633

Ford Fiesta MK7 1.6 TDCI Starter Motor Engine Diesel 8V2111000AD

Product currently unavailable

Part no. 059911024G

Audi A6 C6 ASB 3.0 TDI V6 Starter Motor 059911024G

Product currently unavailable

Part no. 8P0907279C

Audi A3 8P Body Control Comfort Unit Module BCM Unit 8P0907279C

Product currently unavailable

Part no. 057911023EX

Audi Q7 4L Engine Starter Motor Actuator Starter 057911023EX

Product currently unavailable

Part no. A6111531191

Mercedes W901 OM611.987 82HP Engine Unit Module ECU Manual A6111531191

Product currently unavailable

Part no. A2048982614

Battery Cover Mercedes W204 W207 Trim Lid Panel A2048982614

Product currently unavailable

Part no. 7589971-12

Mini One R55 R56 N12 1.4 N12B14A 95HP Petrol ECU Kit DME 7589971 + CAS3 + 2 Keys

Product currently unavailable

Part no. 6C0941824D

Audi A1 S1 8X Fuse Relay Box Module Unit 6C0941824D

Product currently unavailable

Part no. 8579748-1

BMW F10 F11 535d F13 640d N57Z 313HP ECU Kit DDE 8578115 Key + CAS4 Automatic

Product currently unavailable

Part no. 7639049-1

Mini Cooper S R56 LCI N18 1.6 Engine Control Unit ECU Kit DME 7639049 CAS 3 Key

Product currently unavailable

Part no. 6946111

BMW 7 SERIES E65 E66 E67 Sensor, B-pillar left airbag N/S 65776946111 6946111

Product currently unavailable

Part no. 3457428-1

Mini Cooper R58 Footwell Light Module High EKS ECU LEAR PL3 FRM3R 3457428

Product currently unavailable

Part no. 9251426

BMW i3 I01 KaFAS Camera Speed Limit Control ECU Module Unit Front 9251426

Product currently unavailable

Part no. 8H0959433K

Audi A4 B7 Cabrio Body Comfort Central Control Unit Module BCM ECU 8H0959433K

Product currently unavailable

Part no. A2115409108

Mercedes E-Class S211 Parking Sensor Wiring Loom Cable Rear PDC A2115409108

Product currently unavailable

Part no. 9230445

BMW 3 Series E90 Footwell Light Control Module Lear FRM3R PL2 9230445

Product currently unavailable

Part no. DTB2207010149917Z

Mercedes R171 Display Screen Navigation Android Unit Set DTB DTB2207010149917Z

Product currently unavailable

Part no. 83A919605C

Audi RSQ3 F3 Onboard MMI Multimedia Sat Nav Display Touch Screen 83A919605C

Product currently unavailable

Part no. 8632594

BMW F45 Mini F60 High Voltage Battery Wiring Cable Wire Harness Pos Neg 8632594

Product currently unavailable

Part no. 8639595-10

BMW F20 F23 220i Petrol N20 ECU DME Engine Control Unit Module 8617551 Manual

Product currently unavailable

Part no. 6942100

BMW E60 Air Module Control Unit Gateway Sensor B Pillar Right O/S 6942100

Product currently unavailable

Part no. 8781423

BMW F30 Fuse Box Front Body Control Module ECU BCM Unit 8781423

Product currently unavailable

Part no. A1669003501

Mercedes W166 Switch Rotary Selector Controller Navigation Radio A1669003501

Product currently unavailable

Part no. BK2T14301AC

Ford Transit Custom Mk1 Negative Battery Terminal Cable Wiring BK2T14301AC

Product currently unavailable

Part no. Exide Excell 80Ah

Exide Battery Excell EB802 80Ah 700A Accumulator

Product currently unavailable

Part no. A2479003508

Mercedes C118 Instrument Cluster SpeedoMeter Module ECU Control Unit A2479003508

Product currently unavailable

Part no. 7604567-1

BMW E60 LCI E90 E91 325i 525i N53 218HP ECU Kit DME 7604567 CAS3 + Key Manual

Product currently unavailable

Part no. A2118700526

Driver Seat Module Mercedes R171 W203 W211 Memory Control Unit A2118700526

Product currently unavailable

Part no. 4M0907355

Audi A4 B9 Q7 4M A5 F5 Adblue Control Module Unit 4M0907355

Product currently unavailable

Part no. A2049000800

Fuse Box Mercedes W204 S204 SAM Control Unit Module Relay A2049000800

Product currently unavailable

Part no. A2711502879

Mercedes W204 C200 M271.950 184HP Engine ECU Unit Module A2711502879 Manual

Product currently unavailable

Part no. 5A11E72

BMW G20 Axle Differential Module Control Unit ECU 5A11E72

Product currently unavailable

Part no. 6977767

BMW Mini Cooper R50 R52 R53 6-Disc CD Changer Without Magazine 6977767

Product currently unavailable

Part no. 9192740-1

BMW X6 E71 ECU Body Control Module Junction Box PL4 JBBFE II 9192740

Product currently unavailable

Part no. 8T0907441B

Audi S5 8T Rear Reversing Camera Module View Camera Control Unit ECU 8T0907441B

Product currently unavailable

Part no. A2721533391-2

Mercedes R171 272.963 SLK350 272HP Engine Module ECU Kit A2721531291 3 Keys Lock

Product currently unavailable

Part no. 6819950-1

BMW F10 F11 F20 F21 F22 F30 F31 F32 Navigation Sat Nav Head Unit High 6819950

Product currently unavailable

Part no. 6953424-4

BMW Z4 E85 E86 Positive Battery Cable Plus Pole Lead 6953424

Product currently unavailable

Part no. A6519008102

Mercedes SLC 250d R172 OM651.980 204HP Engine Control ECU A6519008102 Automatic

Product currently unavailable

Part no. 7555361

BMW E60 E90 E91 N52 325i 525i 218HP ECU DME 7555361 Engine Control Unit Manual

Product currently unavailable

Part no. A0065424220

Mercedes W164 W251 High Tone Horn Signal Right O/S A0065424220

Product currently unavailable

Part no. 7808405

BMW E60 E61 535d M57N Engine Control ECU Engine Control DDE 7808405 Automatic

Product currently unavailable

Part no. rhd-A4155402608

Door Wiring Mercedes W415 Citan Front Right O/S Loom Cable Harness 241240494

Product currently unavailable

Part no. A2709000900-3

Mercedes W176 A 250 270.920 211HP Blue Efficiency ECU Kit A2709000900 Key Lock

Product currently unavailable

Part no. KT1T18D832BY

Ford Transit Connect Music Radio Stereo CD Player Head Unit KT1T-18D832-BY

Product currently unavailable

Part no. 9389220

BMW Mini Cooper F56 Wiring Passenger Loom Front Left N/S Door Cables 9389220

Product currently unavailable

Part no. 9291962

BMW F20 Door Wiring Front Passenger Door Cable Loom Harness Wiring 9291962

Product currently unavailable

Part no. Bosch S4 004 60Ah Accumulator

Bosch S4 004 Accumulator Battery 60Ah 540A 12V

Product currently unavailable

Part no. 7401878

BMW F30 F31 LCI Front LED Headlight Vertical Actuator Left Right N/O/S 7401878

Product currently unavailable

Part no. Bosch S5 010 85Ah Accumulator

Bosch S5 010 Accumulator Battery 85Ah 800A 12V

Product currently unavailable

Part no. 02M911024C

Volkswagen Tiguan 5N Engine Starter Motor 02M911024C

Product currently unavailable

Part no. 9207852

BMW X5 X6 Series E70 E71 Cable Loom Door Front Passenger Wiring Harness 6900922

Product currently unavailable

Part no. 8509758-1

BMW F01 740d N57S Engine Control Unit ECU Kit DME 8509758 CAS4 Key Automatic

Product currently unavailable

Part no. 8K0907064BP

Audi S5 8T Body Comfort Control BCM Supply Module Unit ECU 8K0907064BP

Product currently unavailable

Part no. A2721533779-1

Mercedes R171 SLK350 272.963 272HP Engine Module ECU Kit A2721533779 2 Keys Lock

Product currently unavailable

Part no. RHD-8E2907355C

Audi A4 S4 B6 B7 8E Module Controller Box Housing Cover Panel 8E2907355C

Product currently unavailable

Part no. A2535402605

Mercedes GLC X253 Rear Bumper Wiring Loom PDC Harness Parking Sensor A2535402605

Product currently unavailable

Part no. 7803372-5

BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE 7803372 CAS3 + Key

Product currently unavailable

Part no. 5A081D4

Module BMW X2 F39 Mini F54 F55 F56 Active Sound Amplifier Design Unit 5A081D4

Product currently unavailable

Part no. BK2T14B144AA

Ford Transit Custom 2.2 TDCI Fuse Relay Box Unit Module BK2T14B144AA

Product currently unavailable

Part no. TM005-3

ConWys AG CFC Towing Hitch Trailer Hook Module Control Unit ECU 52044503RC

Product currently unavailable

Part no. A2124406432

Wiring Loom Mercedes W212 Sound System Display Cable Harness Front A2124406432

Product currently unavailable

Part no. 8386398

BMW X5 Series E53 Connection Cable CD-Changer 8386398

Product currently unavailable

Part no. 3C8937049E

Skoda Octavia II Body Control Module Control Unit BCM ECU 3C8937049E

Product currently unavailable

Part no. 5A4CE55

BMW G20 Radio Audio Amplifier Remote Receiver Control Module Unit 5A4CE55

Product currently unavailable

Part no. 6928990-3

Battery Cable BMW E63 E64 Positive Plus Pole Lead 6928990

Product currently unavailable

Part no. A2098202526

Mercedes CLK C209 Keyless Go Module ECU Entry Door Control Unit A2098202526

Product currently unavailable

Part no. Bosch S5 005 63Ah Accumulator

Bosch S5 005 Accumulator Battery 63Ah 610A 12V

Product currently unavailable

Part no. A6461503934-1

Mercedes CL203 220CDI 646.963 Engine ECU Kit A6461503934 Key + Lock + Ignition

Product currently unavailable

Part no. 9181463

BMW 1 X4 X5 Series F20 F21 F25 F26 Antenna Aerial Diversity Trap Circuit 9181463

Product currently unavailable

Part no. 7573863-2

BMW E90 E92 335i Petrol N54 ECU Kit Control Unit DME 7573863 CAS3 Keys Automatic

Product currently unavailable

Part no. 3457029-1

Mini R56 Footwell Light Module Control Unit Low EKS ECU PL3 FRM3R 3457029

Product currently unavailable

Part no. A2479005807

Mercedes V177 Seat Control Module CSMM Front Right O/S A2479005807

Product currently unavailable

Part no. A1645404501

Mercedes ML W164 Front SAM Body Comfort Module Control Unit A1645404501

Product currently unavailable

Part no. 8J0907115Q

Audi TTS 8J 2.0 TFSI CDLB 272HP Quattro Engine Control ECU 8J0907115Q Automatic

Product currently unavailable

Part no. rhd-7558200

Engine Wiring BMW E60 E61 E63 N62N Ignition Loom Harness Cable 7558200

Product currently unavailable

Part no. A6399000000

Mercedes Vito Viano W639 Side Sliding Door Control Unit Module ECU A6399000000

Product currently unavailable

Part no. 3453809

BMW X3 E83 1.8d 2.0d N47 Engine Wiring Loom Harness Cables Set 3453809

Product currently unavailable

...

Showing 14356-14454 of 20414 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