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. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

€23.95

Free delivery: Mar 10 – 13

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Part no. A6519060026

Starter Motor Mercedes W204 W212 W639 OM651 Diesel Engine DENSO A6519060026

€42.95

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Part no. A1679009011

Mercedes W205 C213 X253 Rear Door Control Module Unit ECU Left N/S A1679009011

€42.95

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Part no. A2129003704

Parking Module Mercedes W207 W212 PDC Distance Control Unit Sensor A2129003704

€28.95

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Part no. 7187221

BMW F01 F02 F03 LCI Rear Third Stoplamp Stop Lamp Brake Light 7187221

€23.95

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Part no. 8K0971688S

Audi A4 B8 Door Harness Loom Cable Wiring Rear 8K0971688S

€23.95

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BMW X1 F48 Cable Loom Door Rear Left Right N/O/S Wiring Harness 6840095

€28.95

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Audi A6 C6 Rear Left N/S Door Lock Control Module Unit ECU 4F0959795P

€23.95

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BMW F20 F21 F30 F31 F32 Rear Body Control Unit Module REM 9279822

€32.95

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Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

€28.95

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Part no. A2229005118

Mercedes W205 Ambient Color Light Module ECU A2229005118

€23.95

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Fuse Box BMW F01 F02 F07 F10 F11 Power Distribution Front 9234421

€23.95

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BMW E60 LCI Front Seat Control Module Unit ECU Left Right N/O/S 9134642

€51.95

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Part no. 4H0906093D

Fuel Pump Audi A8 D4 Q7 4L Diesel Control Unit Module 4H0906093D

€37.95

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Part no. 06K907425B-21

Seat Leon Cupra 5F 2.0 TFSI CJXA 280HP Engine Control ECU Kit 06K907425B Manual

€284.95

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Part no. 2GA947202

VW Volkswagen T-ROC A11 Front Door LED Handle Light Wiring Right O/S 2GA947202

€23.95

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Part no. 8518568-4

BMW F20 F30 F32 120d 320d 420d N47N 184HP Engine Unit ECU DDE 8518568 Automatic

€89.95

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Part no. 9229847

BMW E70 Door Wiring Front Passenger Door Loom Cables Harness 9229847

€23.95

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Part no. 9366413

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

€94.95

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Part no. 3457441

Mini Cooper One R55 R56 R57 LCI R60 R61 CHAMP 2 Navigation DAB 3457441

€284.95

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Part no. 95B919475G

Porsche Macan 95B PDC Parking Assist Sensor Module Control Unit 95B919475G

€104.95

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Part no. 6807322

Positive Cable BMW F90 M5 G30 Battery Wire Lead Underfloor Wiring 6807323

€89.95

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Part no. 6870197

BMW X5 F15 X6 F16 Air Module ECU ICM Control Unit 6870197

€28.95

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Part no. 8793253

BMW X3 G01 Rear Right O/S Door Wiring 8793253

€28.95

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Part no. 9387561

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

€227.95

Free delivery: Mar 10 – 13

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Part no. A6519002803-4

Mercedes W447 114 CDI OM651.950 136HP Engine Unit ECU Kit A6519002803 Automatic

€379.95

Free delivery: Mar 10 – 13

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Part no. A1699000100

Mercedes-Benz A B W169 W245 Front Left Door N/S Control Unit Module A1699000100

€32.95

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Part no. 2T1411000BC

Ford Transit Connect Starter Motor Engine Diesel 2T1411000BC

€47.95

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Part no. 8507885

BMW 1 3 Series F20 F30 Diesel N47N Wiring Harness Engine Gearbox Module 8507885

€37.95

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Part no. 8512415-7

Mini Cooper SD R60 ALL4 N47N 143HP Engine ECU Kit DDE 8512415 CAS3 Key Manual

€227.95

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Part no. 1378238-1

BMW E60 E63 E87 E90 E91 Relay Make Contact Orange Bosch 4 Pins Set 1378238

€23.95

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Part no. 03C972619CG

VW Passat B7 Engine Wiring Loom Cable Harness Injector Module Petrol 03C972619CG

€104.95

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Part no. 9157158

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9157158

€23.95

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Part no. A2059004021

Mercedes W205 GLC X253 Door Module Control Unit Front Left N/S A2059004021

€28.95

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Part no. A1775405520

Mercedes W177 Front Door Harness Loom Cable Wiring Left Right N/O/S A1775405520

€56.95

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Part no. 7L9971104

Volkswagen Touareg 7L Rear Bumper PDC Parking Sensor Wiring Loom 7L9971104

€23.95

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Part no. 02M911023S

Audi TTRS 8J VW Golf Mk6 Starter Motor Engine Bosch 2.0 TDI Diesel 02M911023S

€28.95

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Part no. 5Q0915411H

Volkswagen Jetta A6 Battery Box Protective Casing Insulation 5Q0915411H

€32.95

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Part no. 3457582

Mini R55 R56 LCI R57 LCI R61 Fuse Box Power Distribution Relay 61353457582

€237.95

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Part no. 9323477

BMW X5 F15 X5 M F85 Rear Door Wiring Harness Left Right N/O/S 9323477

€42.95

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Part no. A1669004402

Door Module Mercedes W176 W246 Front Right O/S Control Unit Module A1669004402

€23.95

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Part no. 4K0919390F

Audi A6 C8 Door Panel LED Module Light Unit Rear Right O/S 4K0919390F

€23.95

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Part no. 9350002

BMW F01 F07 F10 F11 X3 F25 Control Unit Air Module ECU Unit Continental 9350002

€23.95

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Part no. 9366407

BMW F20 F21 F30 F31 F32 Body Comfort Module FEM ECU LR01 Control Unit 9366407

€161.95

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Part no. 9857620

Door Wiring Mini F60 Cable Loom Rear Left Right N/O/S Harness 9857620

€66.95

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Part no. 9270392-2

BMW F20 F21 F22 Central Information Display Dashboard Screen 6,5" 9270392

€23.95

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Part no. 6763735

BMW X5 E60 E81 E87 E90 E91 E92 Xenon Headlight Level Sensor

€23.95

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Part no. A2533402600

Mercedes X253 Hybrid GLC Battery Electrical Wiring Harness A2533402600

€23.95

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Part no. 6949922

BMW 3 5 E46 E61 Touring Amplifier Soft Antenna Suppression Filter 6949922

€23.95

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Part no. A2044400035

Mercedes W204 PDC Sensor Wiring Loom Harness Front Bumper A2044400035

€37.95

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Part no. 8677250

Battery Starter Cable Mini Countryman F60 Cooper S B48 Positive Plus 8677250

€32.95

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Part no. A2215408507

Mercedes W221 Door Wiring Harness Cable Front Left Right N/O/S A2215408507

€32.95

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Part no. 7792130

BMW Mini Cooper One R50 R52 R53 R55 R56 R57 Earth Ground Cable 7792130

€23.95

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Part no. 6R0959655M

VW Volkswagen Polo 6R Seat Ibiza 6J Air Module Control Unit ECU 6R0959655M

€37.95

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Part no. 8X0959793K

Audi A1 8X Door Module Front Right O/S Driver's Side Control Unit ECU 8X0959793K

€23.95

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Part no. 9231283-BS

BMW X5 E70 F10 PDC Parking Sensor Distance Control Sensor Black Sapphire - 475

€23.95

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Part no. 06K907425B-18

Audi S3 8V 2.0 TFSI DJHA 310HP Quattro Engine ECU Kit 06K907425B BCM + Key

€284.95

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Part no. 4G8959793A

AUDI A7 4G8 Door Control Module Front Left N/S Driver Side 4G8959793A

€23.95

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Part no. 6863392

BMW F20 LCI X3 F25 X4 F26 F30 F31 F36 Air Module Control Module Unit 6863392

€332.95

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Part no. A0009055504-TNG1

Mercedes W166 C207 Front Rear PDC Parking Distance Sensor Tenorite Grey - 755

€23.95

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Part no. 7841705

BMW E60 M5 E63 E64 M6 V10 S85 Hall Sensor 7836160

€23.95

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Part no. 3M5T-14N003-SB

Land Rover Discovery 4 L319 Wiring Harness Loom Passenger Seat 3M5T-14N003-SB

€23.95

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Part no. 95561209201

Porsche Cayenne 955 9PA Starter Negative Minus Battery Cable Wiring 7L0971228F

€42.95

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Part no. A0009050438

Windscreen Camera Mercedes W204 W212 Front Windshield Camera Unit A0009050438

€28.95

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Part no. 9208452

Wiring BMW F07 Front Bumper PDC Wiring Park Assist Sensor Harness 9208452

€70.95

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Part no. 9371386

BMW 4 Series F33 F83 M4 Convertible Top Module CTM Unit 9371386

€108.95

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Part no. 8585727

Wiring BMW F21 F30 F34 F36 Diesel N47N Engine Gearbox Module Harness 8585727

€32.95

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Part no. A0009003206

Mercedes W205 W222 Fuel Pump Module Control Unit A0009003206

€23.95

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Part no. 5Q0971250T

Volkswagen Golf Mk7 Seat Leon 5F Battery Wire Negative Earth Lead 5Q0971250T

€28.95

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Part no. 9384988

BMW F20 F45 F46 Kafas Camera Control Module Unit ECU 9384988

€23.95

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Part no. A2479009312

Mercedes W910 Telematics Module Communication Blutooth Control A2479009312

€80.95

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Part no. A2049009004

Parking Module Mercedes W204 S204 PDC Distance Control Unit Sensor A2049009004

€23.95

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Part no. 9311850

BMW 1 3 Series F20 F21 F30 F31 Control Unit Air Conditioning A/C Module 9311850

€23.95

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Part no. A9079000304

Mercedes Sprinter W907 W910 Air Module Sensor Unit ECU A9079000304

€66.95

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Part no. 4F0959792T

Audi A6 C6 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

€23.95

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Part no. 9653805580

Peugeot 308 1.6 HDI Diesel Glow Plug Wiring Loom Cable Wiring 9653805580

€23.95

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Part no. 3C1T14A120AA

Ford Transit Mk6 Starter Motor Battery Cable Loom Wiring Harness 3C1T-14A120-AA

€23.95

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Part no. 5Q0959354A

VW Volkswagen Tiguan AX1 Front Air Module Crash Impact Sensor Unit 5Q0959354A

€23.95

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Part no. A2215408609

Mercedes W221 Rear Door Wiring Harness Cable Left N/S A2215408609

€32.95

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Part no. 6C1T-14A076-BB

Ford Transit Mk7 Fuse Box Cover Electrical Unit Housing Trim Cap 6C1T-14A076-BB

€23.95

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Part no. 8F0971029AM

Audi A5 8T Front Door Electric Wiring Loom Harness Driver's Side 8F0971029AM

€42.95

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Part no. 7L5035884E

Porsche Cayenne 9PA MMI Multimedia Navigation Control Head Unit 7L5035884E

€237.95

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Part no. 6834091

BMW F87 F80 F82 Audio Amplifier Harman Becker Active Sound Design System 6834091

€99.95

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Part no. A2389055000

Mercedes W205 Antenna Aerial Amplifier Duplexer Module Receiver Unit A2389055000

€23.95

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Part no. 05L907309AD-1

VW Transporter T6.1 2.0 TDI DNAB 110HP Engine Control ECU Kit 05L907309AD Manual

€455.95

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Part no. CV1T-14B531-AG

Ford Fiesta MK7 Door Module Front Driver Side Control Unit CV1T-14B531-AG

€23.95

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Part no. 7P6907530M

VW Volkswagen Touareg 7P Gateway Module Control Unit ECU 7P6907530M

€28.95

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Part no. A0009001705

Mercedes C117 PDC Parking Sensor Control Module Unit ECU A0009001705

€61.95

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Part no. 2GA971104C

VW Volkswagen T-Roc A11 Wiring Loom PDC Rear Harness Parking Sensor 2GA971104C

€42.95

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Part no. 8H22-14D374-AD

Land Rover Discovery 3 L319 Air Module Sensor Control Unit 8H22-14D374-AD

€37.95

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Part no. DN1T-15K600-JE

Ford Fiesta Mk7 Body Control Module BCM Controller Unit ECU DN1T-15K600-JE

€28.95

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Part no. 04E907309AC-1

Audi A1 8X 1.4 TFSI CZCA 125HP Engine ECU Kit BCM Lock + Key 04E907309AC Manual

€161.95

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Part no. 4M0959595N

Audi Q7 4M Rear Door Control Module Unit ECU Left Right N/O/S 4M0959595N

€32.95

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Part no. A2535401001

Battery Cable Mercedes C238 C253 Starter Alternator Wiring Harness A2535401001

€42.95

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Part no. A2128300008

Fan Blower Mercedes W212 Comand Navi CD Control Unit Module Cooler A2128300008

€23.95

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Part no. A0009055103

Distance Radar Module Mercedes W176 W207 W212 Front Distronic Unit A0009055103

€189.95

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Part no. 8720310

Telematics Module Mini F54 F55 F56 F60 Bluetooth Control Unit ECU 8720310

€61.95

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Part no. 1H5951253

Volkswagen Touareg 7L Relay Alternator Alarm Black 4 Pin 12V No 143 1H5951253

€23.95

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Part no. A0005406904

Mercedes X253 Ground Line Battery Earth Cable Wire A0005406904

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Showing 6238-6336 of 13888 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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