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.

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Part no. A2038209489

Mercedes CLK W203 W209 Antenna Amplifier Radio Right O/S A2038209489

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9366413

FEM Module BMW F20 F21 F22 F30 F32 ECU Control Unit Fuse Box 9366413

PLN 474.95

Free delivery - Tue, Nov 25

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Part no. A2139003617

Telematics Module Mercedes W176 W207 W205 Bluetooth Control Unit A2139003617

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. A2465402705

Mercedes W176 Door Harness Loom Cable Wiring Front Left Right N/O/S A2465402705

PLN 75.95

Free delivery - Tue, Nov 25

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Part no. A1765404609

Mercedes W176 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9364201

PLN 237.95

Free delivery - Tue, Nov 25

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Part no. 8C1T18K931AD

Ford Transit Mk7 V Radio CD Multimedia Player Head Unit ECU 8C1T-18K931-AD

PLN 1,519.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9184432-1

BMW 1 3 Series E81 E87 E90 E91 Control Unit Airbag ECU NO CRASH DATA 9184432

PLN 66.95

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Part no. 9244261

Module BMW F10 Central Gateway Control Unit Module ZGW-01 High 9244261

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 7605061

Alternator Generator BMW F10 F30 N20 Diesel Electrical Unit Denso 210A 7605061

PLN 237.95

Free delivery - Tue, Nov 25

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Part no. 9225022

BMW 2 3 4 Series F22 F30 F31 F32 Battery Power B+ Distribution Box 9225022

PLN 123.95

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Part no. 8741637

BMW X1 F40 F48 Mini F55 F56 F57 F60 Earth Cable Battery Cable 8741637

PLN 75.95

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Part no. 9244161

BMW F01 F02 F03 F04 Head Unit Radio Media Player Navigation 9244161

PLN 902.95

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Part no. 6919759

BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

PLN 42.95

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Part no. 9387561

Head Unit BMW I3 I8 Mini F56 Navigation Sat Nav DAB High Control Module 9387561

Product currently unavailable

Part no. 4L0959793B

Audi Q7 4L Front Door Module Driver Right O/S Side Control Unit 4L0959793B

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9266350

BMW F01 F02 HiFi System Amplifier Harman Becker Audio Booster 9266350

PLN 142.95

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Part no. 6928975

Door Wiring Loom BMW E63 E64 Harness Passengers Side 6928975

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 7624617-1

BMW F20 F21 F30 F31 F32 Cable Alternator Starter Base B 7624617

PLN 47.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 4M0959795N

Audi A4 B9 Door Module Rear Left Right N/O/S Control Unit Module ECU 4M0959795N

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2055406921

Battery Wiring Mercedes X253 Diesel OM651 Alternator Harness Cable A2055406921

PLN 80.95

Free delivery - Tue, Nov 25

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Part no. 9355549

BMW 1 2 3 4 Series F20 F22 F21 F30 F32 LCI ECU USB Hub Module 9355549

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. 4F0959795M

Audi A6 C6 Rear Door Left Right N/O/S Module Unit Control ECU 4F0959795M

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 6856314

BMW 1 3 Series F20 F21 F30 F31 ECU ICM Plus Control Unit Module Airbag

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. A0009006007

Fuel Pump Module Mercedes W205 Control Unit ECU A0009006007

PLN 61.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 03L903017E

Audi A4 B8 A5 8T Q5 8R Quattro Alternator Generator 2.0 TDI 03L903017

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9146244

BMW X3 X5 Series E53 E83 Control Unit Sliding Lifting Roof Panorama 9146244

PLN 113.95

Free delivery - Tue, Nov 25

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Part no. 191906383C

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 191906383C

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9276009

BMW F07 GT Rear Antenna Aerial Amplifier AM/FM DABIII FBD2 868MHZ 9237057

PLN 664.95

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Part no. 6989136-1

BMW E60 E61 E63 PDC Rear Parking Sensor Ultrasonic Titangrau II - A08 6989136

PLN 113.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9335298

BMW 1 Series F20 Front Left Door N/S Wiring Loom Harness Cables 9215715

PLN 93.95

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Part no. A1765405408

Mercedes-Benz A-Class W176 Front Door Cable Wiring Loom Harness A1765405408

PLN 94.95

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Part no. 8584816

Engine Wiring BMW G20 G21 X3 G01 B57 Injectors Module Harness Loom 8584816

PLN 379.95

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Part no. A2049013502

Mercedes W204 S204 Airbag Module Air Bag SRS Control Unit ECU A2049013502

PLN 56.95

Delivery - Tue, Nov 25

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Part no. A1715400107

Mercedes SLK R171 Window Lifter Lift Switch Cable Wiring Harness A1715400107

PLN 42.95

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Part no. 6906070

BMW X5 E53 Roof Antenna Amplifier Trap Circuit 6906070

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 8595865

Wiring BMW F32 F33 F36 LCI N57Z Engine Gearbox Module Wiring Harness 8595865

PLN 378.95

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Part no. 8370933

BMW 3 5 6 Series E60 E61 E63 E90 Support Bracket Navigation Computer 8370933

PLN 42.95

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Part no. A1665400141

Mercedes W166 Petrol Engine HV Battery Earth Ground Line Cable Wire A1665400141

PLN 123.95

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Part no. 7541779

BMW Z4 E85 2.0i N46 Cable Alternator Starter Base B+ 7541779

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A6229000700

Mercedes W447 Bosch Glow Plug Relay Controller Unit Control Module A6229000700

PLN 332.95

Free delivery - Tue, Nov 25

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Part no. A1779069601

Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

PLN 427.95

Free delivery - Tue, Nov 25

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Part no. 9119357

BMW 1 3 5 E60 E81 E87 E90 E91 Mini R55 R56 DAB Radio Tuner Module 9119357

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. A6401502579

Mercedes W169 200CDI OM640.941 140HP Engine Control Unit Module ECU A6401502579

PLN 569.95

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Part no. 8671504-1

Starter BMW G20 G21 G30 G32GT G01 G05 Starter Motor Valeo 8671504

PLN 237.95

Free delivery - Tue, Nov 25

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Part no. 9866982

BMW F20 F22 F30 F32 REM Rear Electronic Module Fuse Box Control Unit V5 9866982

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. 6838610

BMW 1 Series F40 Aerial probe AM/FM Antenna 6838610

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 9227238

BMW E93 LCI Boot Trunk Lid Tailgate Wiring Loom Harness Cable 9227238

PLN 189.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8679817

BMW F98 Earth Ground Cable Negative Battery Lead Wiring 8679817

PLN 66.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2229008911

Tuner Box Mercedes W213 W205 W222 Digital Audio Control Unit DAB ECE A2229008911

PLN 218.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9187011

BMW F01 F07 GT Console Lightning Centre LED Lamp Light Cable Wiring 9187011

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. A1775401731

Mercedes W177 M282 Wiring Harness Battery Starter Motor Alternator A1775401731

PLN 284.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6913896

BMW Z4 E85 E86 Aerial Antenna Amplifier Module Rod 6913896

PLN 42.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 5M0035186AA

Radio CD Player VW Volkswagen Golf Polo Passat B6 Head Unit RCD310 5M0035186AA

PLN 75.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8632692

BMW X5 F15 N20 Petrol Wiring Harness Transmission Gearbox Module Cable 8632692

PLN 712.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. A2059007705

Module Mercedes C205 Transmission Drivetrain Control Module Unit A2059007705

PLN 56.95

Delivery - Tue, Nov 25

If paid before 14:00

Part no. 6906548

Mini Cooper R56 Electrical System Fuse Distribution Box 6906548

PLN 85.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9253637

BMW 3 5 Series F10 F11 F30 F31 Airbag Control Unit Module 9253637 65779253637

PLN 89.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 90589541

Vauxhall Opel Astra G Fuse Box Covering Trim Panel Lid Housing 90589541

PLN 47.95

Delivery - Tue, Nov 25

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Part no. 8506566-2

BMW E90 E91 LCI 320d ed N47N 163HP ECU DDE 8506566 Manual Transmition

PLN 284.95

Free delivery - Tue, Nov 25

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Part no. A2139000124

Mercedes W213 W222 C257 Amplifier Module Audio Burmester A2139000124

PLN 1,899.95

Free delivery - Tue, Nov 25

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Part no. 9110621

BMW 3 Series E90 E92 LCI Suppression Filter for Antenna 9110621 652 9110621

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A1179001801

Mercedes W176 Air Module System Control Unit Module ECU A1179001801

PLN 284.95

Free delivery - Tue, Nov 25

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Part no. 7191718

BMW Z4 Series E89 Roadster Cabrio Horn High Tone 7191718

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 9805422

BMW Mini Cooper One R50 R52 R53 R55 R56 R57 R58 R59 R60 R61 Earth Ground Cable

PLN 47.95

Delivery - Tue, Nov 25

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Part no. A2124400314

Mercedes W164 W204 Fuel Pump Module Control Unit ECU A2124400314

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 5Q1937084C

Audi Q2 GA Module BCM Body Control Unit Module ECU 5Q1937084C

PLN 617.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9285504

Distributor BMW X5 F15 X6 F16 B + Battery Power Distributor 9285504

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A2118701585

Rain Sensor Mercedes W211 W219 Windscreen Control Unit Module A2118701585

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. A6395406509

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6395406509

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9166711

BMW E90 Light Control Module ECU LCM NSW Footwell PL2FRMFA 9166711

PLN 142.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 8573260-8

BMW F20 F21 116d ed Diesel N47N 116HP ECU Kit DDE 8573260 + Key + FEM Manual

PLN 1,709.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9145158

BMW E60 E61 E63 E65 PDC Parking Control Module Unit ECU 9145158

PLN 284.95

Free delivery - Tue, Nov 25

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Part no. A2055400555

Mercedes W205 Door Electrical Wiring Harness Front Left N/S A2055400555

PLN 94.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 7520019-5

MINI Cooper S R52 R53 W11 170HP Engine Control Unit ECU DME 7520019 Manual

PLN 189.95

Free delivery - Tue, Nov 25

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Part no. 7PP907279CT

Porsche Macan 95B Body Control Unit Module BCM 7PP907279CT

PLN 807.95

Free delivery - Tue, Nov 25

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Part no. 9119444

BMW E81 E87 LCI E90 E91 E92 Front Fuse Box Power Distribution 9119444

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A2079012500

Air Module Mercedes C204 C207 Sensor Control Unit ECU A2079012500

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. 02M911024

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

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 7P0941828B

Volkswagen Touareg 7P 3.0 TDI Fuse Box Control Module 7P0941828B

PLN 161.95

Free delivery - Tue, Nov 25

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Part no. 7811163

BMW 1 3 5 Series F10 F20 E90 LCI Wiring Harness Engine Glow Plug Module 7811163

PLN 47.95

Delivery - Tue, Nov 25

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Part no. 8P0959655P

Audi A3 8P Air Module Control Unit ECU Module 8P0959655P

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 9118468

BMW X5 X6 Series E70 E71 Seat Backrest Adjustment Adapter Lead Cable 9118468

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9361654

Radio Player Mini F55 F56 CD Bluetooth DAB Control Unit Module 9361654

PLN 427.95

Free delivery - Tue, Nov 25

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Part no. A1695400132

Cable Wiring Mercedes W245 Fuel Pump Sending Unit Plug Socket A1695400132

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 9187533

BMW E92 ECU Body Control Module Junction Box L1 PL2 JBBFE II 9187533

PLN 42.95

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Part no. 80A907777N

Audi Q5 FY Active Suspension Module Damping Chassis Control Unit EFP 80A907777N

PLN 1,139.95

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Part no. A1775401629

Mercedes W177 Rear Bumper PDC Wiring Loom Parking Sensor A1775401629

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. A0005454516

Mercedes W204 Automatic Gearbox EGS Control Module Unit ECU A0005454516

PLN 132.95

Free delivery - Tue, Nov 25

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Part no. 35962

BMW X3 Series E53 E83 iPod Interface Retrofit Connection Module 0035962

PLN 142.95

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Part no. A2479004707

Mercedes W177 Dynamic Adaptive Suspension System Control Unit Module A2479004707

PLN 427.95

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Part no. 6772102

BMW X5 X6 E70 E71 Holder Bracket Actuator Unit 6772102

PLN 47.95

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Part no. 9374510

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9374510

PLN 94.95

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Part no. 8606306

BMW F10 F11 F30 184 HP Petrol N20 Engine Control Unit ECU DME 8606306 Manual

PLN 1,662.95

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Part no. 36100-2A550

Kia Sportage 3 1.7 Diesel Engine Starter Motor Denso 36100-2A550

PLN 56.95

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Part no. 5Q0907361C

Audi A3 8V Fuse Box Control Module Relay Box 5Q0907361C

PLN 94.95

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Part no. 6857300

Air Module BMW F01 F02 LCI F10 F11 F13 ICM Crash Control Unit ECU 6857300

PLN 108.95

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Part no. 4F0959655E

Audi A6 C6 SRS Crash Air Module Safety ECU Unit Control 4F0959655E

PLN 127.95

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Part no. 8408783

BMW X5 E53 Flap Radio Partition Mounting Part Cover Dashboard 8408783

PLN 47.95

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Part no. 6982652

BMW 1 Series E82 E88 Positive Battery Lead Cable Wire 61126982652 6982652

PLN 42.95

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Showing 1090-1188 of 11506 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 .

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