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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Products in promotion

Part no. 9393667

BMW F10 LCI Body Control Module ECU Unit JBBFEIII V2 PL6 9393667

€56.95

Free delivery - Wed, Jan 14

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Part no. A2055401900

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2055401900

€80.95

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Part no. A0009000716

Mercedes Vito W447 Diesel Adblue Module Control Unit ECU A0009000716

€104.95

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Part no. 8518569-5

BMW F20 F21 F30 F31 N47N 118d 318d 143HP Engine Control ECU DDE 8518569 Manual

€80.95

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Part no. 6857208

Parking Distance Assistant BMW 20 F21 F30 F31 F36 Control Unit Module 6857208

€42.95

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Part no. 5A149A9

BMW F40 116d B37B B37C15A 116HP Engine Control Unit Module ECU DME 5A149A9

€313.95

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Part no. 7578020-7

BMW E60 E90 LCI 325i 525i N53 218HP Engine Control Unit ECU DME 7578020 Manual

€436.95

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Part no. 9367837

Air Module BMW F45 X1 F48 Mini F54 F55 F56 Air Control Unit ECU 9367837

€170.95

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Part no. A6401502579

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

€170.95

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Part no. 9134669

BMW E93 Convertible Seat Control Unit Module ECU 9134669 FSV 7.10.0

€32.95

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Part no. 4F0903291

Audi A6 C6 3.0 TDI Suppression Condenser Noise Filter 4F0903291

€23.95

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Part no. 5H0963554

Volkswagen Golf Mk8 Rear Seat Bench Couch Occupancy Sensor Unit 5H0963554

€32.95

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Part no. 6798242

ICM Module BMW F10 F11 Integrated Chassis Management QL ES Control Unit 6798242

€23.95

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Part no. 6928944

BMW X3 Series E83 Battery Positive Cable Fuse Box 61136928944 6928944

€23.95

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Part no. 6990090

BMW E61 E63 E90 E92 F06 Mini R55 R56 Trap Circuit Antenna 6990090

€23.95

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Part no. 7L0971767

Volkswagen Touareg 7L Washer Reservoir Bottle Wiring Harness Loom 7L0971767

€23.95

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Part no. 9231442

BMW 2 3 4 Series F22 F30 F32 F36 Antenna Suppression Filter Aerial 9231442

€23.95

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Part no. 6812248

BMW X1 F48 Front Door Wiring Loom Harness Cable Driver Side 6812248

€42.95

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Part no. 6948692

BMW E60 E61 E63 Passenger Side Door Airbag Control Module 6948692

€23.95

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Part no. 8636054

BMW F20 F30 LCI 120i 320i 330i B48 Engine Wiring Cable Loom Harness 8636054

€165.95

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Part no. 4H0907383N

Porsche Macan 95B Trailer Detection Control Module Unit ECU 4H0907383N

€213.95

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Part no. 4H0971224BA

Audi A8 D4 Alternator Starter Motor Wiring Harness Cable Loom 4H0971224BA

€56.95

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Part no. N1XT-14630-TFE

VW Volkswagen Amarok NF Front Door Harness Wiring Passenger Side N1XT14630TFE

€42.95

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Part no. 7N0959795

Skoda Yeti 5L Door Control Unit Module ECU Rear Left N/S 7N0959795

€23.95

Free delivery - Wed, Jan 14

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Part no. 9266328

ICM Module BMW F07 GT F01 F02 F03 F04 Air Module Control Unit ECU 9266328

€23.95

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Part no. 7473684

Door Cable BMW F25 F26 Right O/S Wiring Loom Harness Handle Light Lamp 7252538

€32.95

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Part no. 9366409

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9366409

€94.95

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Part no. 7290719

BMW F40 F54 Cover Battery Vehicle Trim 7290719

€23.95

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Part no. 6882971

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Air 6882971

€28.95

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Part no. 3413934-2

BMW X3 E83 Rear Bumper Wiring Loom PDC Harness 1452049

€23.95

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Part no. A2469005312

Mercedes X117 X156 W246 Relay Control Unit Module A2469005312

€75.95

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Part no. 06E971627M

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627M

€23.95

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Part no. 7837273

BMW 1 3 Series E81 E87 E90 E91 PDC Parking Ultrasonic Sensor Le Mans Blau Blue

€23.95

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Part no. A0009820512

Energy Distributor Mercedes W177 W212 Power Control Unit Module A0009820512

€23.95

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Part no. 6974245

BMW MINI Cooper Clubman R55 R55N LCi Retaining Bracket Safety Belt Rear Left N/S

€23.95

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Part no. 5H0971385F

Volkswagen Golf Mk8 CD1 Rear Seat Couch Wiring Harness Cable Loom 5H0971385F

€70.95

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Part no. 8355056

BMW 5 X5 Series E53 Fuel Tank Flap Actuator 8355056

€23.95

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Part no. 7571142-2

Mini Cooper R55 R56 R57 Battery Cable Wiring Lead Power Positive 7571142

€23.95

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Part no. 3D0951253A

VW Volkswagen Audi Seat Skoda Relay Black 5 Pins 12V 50A Set 433 3D0951253A

€23.95

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Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

€142.95

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Part no. A2466200028

Mercedes W176 Battery Support Holder Bracket Mount A2466200028

€23.95

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Part no. A0025422619-2

Mercedes ML W163 Relay 4-Pin Grey Tyco Set Kit A0025422619

€23.95

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Part no. 6977982-2

Mini Cooper R50 R53 R56 R57 R60 Relay No Contact Taubenblau Blue Set 2X 6977982

€23.95

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Part no. 2GA035284A

Seat Ibiza KJ1 VW Polo MK6 Online Services Control Module ECU Unit 2GA035284A

€132.95

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Part no. 95B907553T

Porsche Macan 95B Air Suspension Control Module Unit ECU 95B907553T

€237.95

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Part no. 02M911023G

VW Volkswagen Golf 1K 2.0 TFSI BWA Starter Motor 02M911023G

€23.95

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Part no. A4148200526

Mercedes Vaneo W414 Front Left Right Door N/O/S Control Unit Module A4148200526

€23.95

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Part no. 95B971030FP

Porsche Macan 95B Door Wiring Harness Loom Cable 95B971030FP

€66.95

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Part no. 8K0907064HE

Audi A4 B8 Body Control Module BCM Comfort Control Unit 8K0907064DP

€23.95

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Part no. 7N0959794

Skoda Yeti 5L Door ECU Module Control Unit Rear Right O/S 7N0959794

€23.95

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Part no. 7641652-1

Engine Wiring BMW F10 F31 F32 N20 Engine Sensor Module 1 Harness 7641652

€47.95

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Part no. 6824129

Inverter Wiring BMW F45 Mini F60 Hybrid High Voltage Battery Cable Loom 6824129

€70.95

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Part no. 4H0971142C

Audi A8 D4 Door Card Wiring Loom Cable Harness Rear Right O/S 4H0971142C

€23.95

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Part no. 9367376

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9367376

€66.95

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Part no. 9370431

BMW X1 Series F48 KaFAS Camera Assist Speed Limit Control 9370431

€47.95

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Part no. 7286050

BMW F20 Control Unit Module Wing Mirror Power Fold 7286050

€66.95

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Part no. A2129007024

Mercedes CLS C218 Front Fuse Relay Box On Board Supply A2129007024

€75.95

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Part no. 9221109-2

BMW E60 Body Gateway Module Control Unit KGM E6X High D-Can Lear 9221109

€23.95

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Part no. 6953467

BMW 1 3 Series E88 E93 Convertible Tel Phone Antenna Aerial 6953467

€23.95

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Part no. 2992478-3

Plug Socket BMW X1 E84 Rear Light In The Side Panel Right O/S Wiring 6984754

€23.95

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Part no. A2205400382

Mercedes CL S Class C215 W220 Fuse Box Unit Front Right O/S Cover A2205400382

€28.95

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Part no. BK3T11000FA

Starter Motor Ford Transit 2.2 TDCI Diesel Engine BK3T11000FA

€47.95

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Part no. 8644376

BMW G20 G30 F40 F45 Mini F54 F56 F60 Crankshaft Position Sensor 8644376

€23.95

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Part no. 9228914

Radio CD Player BMW F10 F11 F13 Navigation ECE Sat Nav Head Unit 9228914

€284.95

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Part no. 9315684

BMW F20 F21 F30 F31 F32 Body Control Comfort Module Unit FEM ECU LR01 9315684

€94.95

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Part no. 6977982-3

Mini Cooper R50 R53 R56 R57 R60 Relay No Contact Taubenblau Blue Set 4X 6977982

€23.95

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Part no. 9113064

BMW 5 Series E60 E61 LCI Centre Console Switch Cluster Control Unit ECU 9113064

€23.95

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Part no. 9811260

BMW Mini Cooper R60 Wiring Passenger Loom Front Door Cables Left N/S 9811260

€23.95

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Part no. 7PP907279CT

Porsche Macan 95B Body Control Unit Module BCM 7PP907279CT

€189.95

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Part no. 03E906019M-2

Volkswagen Polo 6R 1.2 Petrol CGPB 60HP Engine Control ECU Kit 03E906019M Manual

€161.95

Free delivery - Wed, Jan 14

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Part no. 1543107

Ford Transit Connect Alternator Bracket Mount Support 1.8 TDCi 6C1Q-10K019-AC

€32.95

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Part no. 9117877

BMW F20 F21 F30 F31 F32 F33 Negative Minus Pole IBS Battery Lead Cable 9117877

€23.95

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Part no. 9315130

Door Wiring Harness BMW F25 Rear Left Right Door N/O/S Wiring Loom 9315130

€28.95

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Part no. 7607454

Battery Insert BMW F13 F12 F06 Battery Crashpad Foam Insulator 7607454

€23.95

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Part no. A2479002707

Communication Module Mercedes W177 W247 Hermes LTE Control Unit A2479002707

€51.95

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Part no. a0045468040

Mercedes W204 W212 W221 Power Distributor Box Conectors Socket A0045468040

€23.95

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Part no. A2059067200-1

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

€28.95

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Part no. A0009003606

Mercedes W176 W246 Automatic Transmission Control Uni A0009003606

€23.95

Free delivery - Wed, Jan 14

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Part no. 6906626

Mini R50 R52 R53 Fuse Box Housing Electrical Power Distribution Box 6906626

€23.95

Free delivery - Wed, Jan 14

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Part no. A0038206326

Mercedes W221 Door Module Front Door Left N/S Control Module A0038206326

€47.95

Free delivery - Wed, Jan 14

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Part no. TM450

Trafficmaster TM450 GPS Vehicle Location Tracker Control Unit Module ECU

€23.95

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Part no. A0051513901

Kompressor Mercedes W203 W211 M271 Petrol Engine Starter Motor A0051513901

€23.95

Free delivery - Wed, Jan 14

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Part no. A1031550435

Mercedes W124 M103 Bracket Alternator Mount Holder Support A1031550435

€32.95

Free delivery - Wed, Jan 14

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Part no. 7350697-2

BMW X1 F48 Rear Light Lamp Trunk Tailgate Left N/S Loom Harness Wiring 7350697

€23.95

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Part no. 1508937

BMW Mini Cooper S One D R50 R52 R53 Negative Battery Cable Wire 1508937

€23.95

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Part no. 5Q0971230AQ

Seat Leon 5F VW Golf Mk7 Alternator Wiring Harness Loom Cable 5Q0971230AQ

€23.95

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Part no. 4M0959793H

Audi A5 F5 A4 B9 Front Door Control Module Unit ECU Driver's Side 4M0959793H

€28.95

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Part no. A2829003300

Mercedes W177 A200 163HP M282.914 Engine Control Unit ECU A2829003300 Automatic

€37.95

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Part no. 6C0907159B

Volkswagen Polo 6C Body Sound Impact Control Module ECU 6C0907159B

€23.95

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Part no. 8518568-3

BMW F20 F30 120d 320d ed Diesel N47N 163HP ECU Kit DDE 8518568 + Key + FEM

€132.95

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Part no. A4518200675

Smart Fortwo C450 Aerial Antenna Rod Radio GPS Antenna Unit A4518200675

€28.95

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Part no. 4F0907553A

Audi A6 C6 Allroad Adaptive Suspension Module Software Control Unit 4F0907553A

€127.95

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Part no. 9294309

Dashboard Monitor BMW X3 F25 X4 F26 Onboard Central Display Screen 6,5" 9294309

€189.95

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Part no. A0009059101

Mercedes-Benz E-Class W207 W212 ESP Yaw Rotation Rate Sensor A0009059101

€23.95

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Part no. 6989080-OLI

BMW E65 E66 E67 PDC Rear Parking Sensor Ultrasonic Olivin Metallic

€28.95

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Part no. 06E971627Q

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627Q

€23.95

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Part no. 9128602

Cables Wiring BMW E81 E87 LCI Front Bumper PDC Loom Set 9128602

€32.95

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Part no. 6952477

BMW 5 Series E60 E61 Centre Console Switch Centre DTC PDC 6952477

€23.95

Free delivery - Wed, Jan 14

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Part no. 9237055

Antenna Diversity BMW F07 GT Control Unit Module Aeral Amplifier 868 MHZ 9237055

€23.95

Free delivery - Wed, Jan 14

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Showing 2278-2376 of 12466 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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