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. 9154329

Mini Clubman R55 Cable Wiring Loom Splitdoor Door Rear Right O/S 9154329

€23.95

Free delivery - Tue, Jan 13

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Part no. 9196669

CD Changer 6 Disc BMW E81 E87 E90 E91 E92 Without Magazine 9196669

€32.95

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Part no. 1Z0907115A

Skoda Octavia RS VRS 1Z II 2.0 TFSI BWA 200HP Engine Unit ECU 1Z0907115A Manual

€113.95

Free delivery - Tue, Jan 13

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Part no. 7534921-1

BMW 3 X3 Z4 Series E46 E83 E85 Engine Control Unit Box Bottom Part 7534921

€23.95

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Part no. 8654977

BMW X5 F15 N20 Petrol Sensor System Engine Wiring Harness Cable Loom 8654977

€175.95

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Part no. A0025427219

Mercedes W169 W245 W204 W212 Relay 4-Pin Black Hella A0025427219

€23.95

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Part no. A2128203485

Door Module Mercedes W204 W212 Front Left N/S Control Unit Module A2128203485

€23.95

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Part no. A2045458601

Mercedes W204 Fuse Box Rear Relay Control Unit Module SAM A2045458601

€113.95

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Part no. A2229006008

Mercedes W205 W217 W222 Tailgate Trunk Control Module Unit A2229006008

€23.95

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Part no. 6983075

BMW F01 F07 F10 F30 LCI Fan Motor For Amplifier Control Unit Module Controller

€23.95

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Part no. A9065410140

Mercedes-Benz Sprinter W906 Battery Tray Holder Mounting Bracket A9065410140

€23.95

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Part no. A1644400837

Mercedes W164 Parking Sensor Wiring Loom Cable Harness Front PDC A1644400837

€80.95

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Part no. 8507918

BMW F20 F21 N47S1 Engine Wiring Harness Injector Module Loom Cable 8507918

€104.95

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Part no. DE8T19H463DC

Ford Transit Connect Mk2 Rain Sensor Control Unit Module FoMoCo DE8T-19H463-DC

€23.95

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Part no. KV6T-14B060-AAF

Ford Transit Connect Battery Cable Engine Wiring Harness Loom KV6T-14B060-AAF

€37.95

Free delivery - Tue, Jan 13

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Part no. 7589971-8

Mini Cooper R55 R56 Engine N12 1.6 120HP ECU Kit DME 7589971 + CAS3 + Key Manual

€170.95

Free delivery - Tue, Jan 13

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Part no. 8576341-4

BMW F20 F21 F30 F31 118d 318d 143HP N47N ECU Kit DDE 8576341 + Key + FEM

€284.95

Free delivery - Tue, Jan 13

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Part no. A2465400308

Alternator Cable Mercedes W176 W246 OM651 Battery Prefuse Box A2465400308

€23.95

Free delivery - Tue, Jan 13

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Part no. 6954776

BMW Z4 E85 Roadster Cabrio Convertible Roof Module Folding Top 6954776

€37.95

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Part no. 9244422

BMW X5 E70 LCI Front Bumper PDC Loom Cables Wiring Set 9244422

€37.95

Free delivery - Tue, Jan 13

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Part no. 7571142-1

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

€23.95

Free delivery - Tue, Jan 13

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Part no. A1638201126

Mercedes ML W163 Windscreen Rain Light Sensor Control Module A1638201126

€23.95

Free delivery - Tue, Jan 13

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Part no. 8654460-2

Mini Cooper F54 F55 136HP Petrol B38 Engine ECU Kit DME 8654460 + BDC + Key

€370.95

Free delivery - Tue, Jan 13

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Part no. 9803844

Mini Cooper Countryman R60 R61 Aerial Roof Antenna Base Module 9803844

€23.95

Free delivery - Tue, Jan 13

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Part no. 6905639

BMW E65 E66 Japan Mobile Phone Buffer Module ECU J-buf 6905639

€23.95

Free delivery - Tue, Jan 13

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Part no. 6986987

BMW Z4 Series E85 Cable Loom Passenger's Door Wiring Harness 6986987 6986982

€56.95

Free delivery - Tue, Jan 13

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Part no. 4G5907468K

Audi A6 C7 Gateway Interface Electrical Control Unit Module ECU 4G5907468K

€165.95

Free delivery - Tue, Jan 13

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Part no. N1XT-14D338-ADC

VW Volkswagen Amarok NF Wiring Harness Loom Cable N1XT-14D338-ADC

€23.95

Free delivery - Tue, Jan 13

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Part no. 03L906019AG-1

Audi A6 C6 2.0 TDI CAHA 170HP Engine ECU Kit 03L906019AG Ignition + Key Manual

€218.95

Free delivery - Tue, Jan 13

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Part no. 8X0959793F

Audi A1 8X Front Door Module Unit Control Driver's Side Right O/S 8X0959793F

€23.95

Free delivery - Tue, Jan 13

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Part no. 1K0919041

VW Golf MK6 Seat Leon 1P Altea Voltage Stabilizer Control Unit Module 1K0919041

€23.95

Free delivery - Tue, Jan 13

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Part no. 8K2907115S-1

Audi A4 B8 8K A5 8T 2.0 TFSI CDNB 180HP Engine Control ECU 8K2907115S Manual

€89.95

Free delivery - Tue, Jan 13

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Part no. 8J0035456A-1

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

€23.95

Free delivery - Tue, Jan 13

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Part no. 8706502

BMW 1 3 4 Series F20 F21 F30 F31 Radio Remote Control Receiver 434 MHZ 8706502

€23.95

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Part no. 06M907309D-1

Audi SQ5 FY 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit Gateway + Key 06M907309D

€617.95

Free delivery - Tue, Jan 13

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Part no. 4H0907355D

Audi A7 4G A8L 4H Ad Blue Control Module Unit ECU 4H0907355D

€32.95

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Part no. 9185542

BMW X5 E70 CCC Radio CD Player Navigation 9185542

€237.95

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Part no. 7567776

Starter Cable BMW E81 X1 E84 E87 E90 N52 Alternator Battery Wire B 7567776

€23.95

Free delivery - Tue, Jan 13

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Part no. 7794908

Preheater System Lead BMW E87 E90 E91 Diesel 7794908

€23.95

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Part no. 9118101

BMW 1 Series E81 E82 Driver Side Offside O/S Door Wiring Loom Harness 9118101

€23.95

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Part no. 1H0953227

Audi Seat Volkswagen Polo 6N Turn Signal Hazard Light Relay 191 1H0953227

€23.95

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Part no. 50325-MAL-600

Honda CBR F3 Battery Box Tray Covering Housing Trim Holder Bracket 50325-MAL-600

€23.95

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Part no. 8582279-4

BMW F30 320d ed Diesel N47N 163HP Engine Control Unit ECU DDE 8582279 Manual

€99.95

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Part no. 9286789

BMW E88 ECU Body Control Module H4 Junction Box PL2RR JBBFE IIIR 9286789

€80.95

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Part no. 8Y0035465A

Audi Q2 GA Harman Speaker Amplifier Booster Sound System 8Y0035465A

€146.95

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Part no. 8W0947355M

Audi A4 B9 LED Module Light Unit Wiring Harness Right Rear O/S 8W0947355M

€23.95

Free delivery - Tue, Jan 13

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Part no. 8638585

BMW F20 F21 F30 F31 LCI Cable Alternator-Starter-Base B+ 8638585

€23.95

Free delivery - Tue, Jan 13

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Part no. 7520912-1

BMW E60 E61 E63 E64 LCI Lid Cover Panel Electronic Box 7520912

€23.95

Free delivery - Tue, Jan 13

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Part no. 1K0937517-1

Audi A3 RS3 8V Potential Power Distribution Junction Box Jump Point 1K0937517

€23.95

Free delivery - Tue, Jan 13

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Part no. A2034400033

Mercedes CLC CL203 Wiring Loom Cable Door Front Left Right N/O/S A2034400033

€23.95

Free delivery - Tue, Jan 13

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Part no. A2129004106

Door Module Mercedes W212 Rear Left N/S Control Unit A2129004106

€23.95

Free delivery - Tue, Jan 13

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Part no. 8652443

BMW F45 Wiring Harness Motor Sensor System Module 8652443

€42.95

Free delivery - Tue, Jan 13

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Part no. 7273667

BMW F30 F31 F32 Rear Tailgate Smart Opener Lower Antenna 7273667

€23.95

Free delivery - Tue, Jan 13

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Part no. 9276099

BMW F01 F10 Diversity Aerial Antenna Amplifier Module DAB 9276099

€35.95

Free delivery - Tue, Jan 13

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Part no. A2479005707

Mercedes W177 Front Seat Left N/S Module Control Unit ECU A2479005707

€113.95

Free delivery - Tue, Jan 13

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Part no. 6832695

Mini Clubman F54 Battery Cable Negative Terminal Wiring 6832695

€23.95

Free delivery - Tue, Jan 13

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Part no. VW-Remote-Key

VW Passat Radio Remote Control Alarm Key Fob Control Unit Module

€23.95

Free delivery - Tue, Jan 13

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Part no. 6864927

BMW F01 F02 LCI F06 F10 F11 F13 ECU ICM Control Unit Air Module 6864927

€23.95

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Part no. A1698204515

Media Plug Mercedes W169 W245 Multimedia Connection Cable Wire A1698204515

€23.95

Free delivery - Tue, Jan 13

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Part no. A2469009212

Mercedes X117 Tailgate Boot Control Rear Module Unit A2469009212

€80.95

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Part no. 10723AF

Ford Transit Connect Battery Box Tray Housing Holder Bracket 10723AF

€23.95

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Part no. 6906914

BMW X5 E53 Battery Cable Negative Wire 6919976

€23.95

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Part no. 9207075

BMW X3 X5 Series E83 E53 Telematics Control Unit Module 9207075

€80.95

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Part no. 1472984-3

Mini R50 R52 R53 R55 R56 R57 R58 R59 R60 5-Pin Black Relay Wiper Set 1472984

€23.95

Free delivery - Tue, Jan 13

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Part no. 8577241

BMW F30 F32 LCI 330d 335dX 430d 435dX Alternator Starter Cable B+ 8577241

€23.95

Free delivery - Tue, Jan 13

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Part no. 7L0909606D

Volkswagen Touareg 7L Front Impact Crash Sensor Right Left N/O/S 7L0909606D

€23.95

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Part no. 6791131

BMW F01 ICM Module Integrated Chassis Management QL ES Control Unit 6791131

€47.95

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Part no. A1775401758

Mercedes W118 W177 W247 Starter Alternator Wiring Loom Harness Cable A1775401758

€80.95

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Part no. 6980089

BMW 5 Series E60 E61 Alarm System Unit Ultra Sonic Module 6980089

€23.95

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Part no. 8632692

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

€175.95

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Part no. 8678964

BMW X1 F48 Mini Cooper F55 F56 Engine Gearbox Module Wiring Cable Loom 8678964

€23.95

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Part no. 6911908

On Board Monitor BMW X5 E70 X6 E71 Sat Nav System Screen Display 8,8" 6911908

€85.95

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Part no. 8K0907637A

Audi A5 8T Acceleration Yaw Rate Sensor Module Control Unit ECU 8K0907637A

€23.95

Free delivery - Tue, Jan 13

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Part no. A2038700326

Mercedes CLC CL203 Front Left N/S Door Control Module Unit A2038700126

€28.95

Free delivery - Tue, Jan 13

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Part no. A1728100011

Mercedes W176 W204 W212 Navigation Control Unit Module NTG 4.5 A1728100011

€23.95

Free delivery - Tue, Jan 13

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Part no. 4F0910655Q

Audi A6 C6 4F Control Unit Air Module ECU Bosch 4F0959655G

€23.95

Free delivery - Tue, Jan 13

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Part no. A0025428019

Relay Mercedes W176 W246 4-Pin Black Hella 12V A0025428019

€23.95

Free delivery - Tue, Jan 13

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Part no. A0035420219-2

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219

€23.95

Free delivery - Tue, Jan 13

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Part no. 8602973

Battery Cable BMW F45 Mini F54 F56 B48 Alternator Starter Wiring 8602973

€42.95

Free delivery - Tue, Jan 13

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Part no. 6854856

BMW F10 F11 F12 EMF Module Parking Brake Unit Electric Control 6854856

€32.95

Free delivery - Tue, Jan 13

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Part no. 9360371

BMW X6 F16 Fuse Relay Box Control Unit Power Distribution 9360371

€23.95

Free delivery - Tue, Jan 13

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Part no. 9253482-2

BMW E87 Junction Box ECU Body Control Module Unit H2 PL2RR JBBFE IIIR 9253482

€23.95

Free delivery - Tue, Jan 13

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Part no. A0045428718-1

Mercedes W203 W211 Parking Distance Sensor PDC Iridium Bright Silver

€23.95

Free delivery - Tue, Jan 13

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Part no. 9185474

Mini Cooper R60 R61 Antenna Aerial Diversity Trap Circuit 9185474

€23.95

Free delivery - Tue, Jan 13

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Part no. 8677247

Mini Countryman F60 Cable Alternator Starter Wire 12428677247 8677247

€28.95

Free delivery - Tue, Jan 13

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Part no. A2769004901

Mercedes A238 Convertible E450 M276.823 Engine ECU Unit A2769004901 Automatic

€474.95

Free delivery - Tue, Jan 13

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Part no. 4H0907801F

Audi A6 C7 Parking Brake Handbrake Module Control Unit 4H0907801F

€23.95

Free delivery - Tue, Jan 13

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Part no. 8K0971104T

Audi A4 S4 B8 Front Rear Bumper PDC Parking Sensor Wiring Loom 8K0971104T

€28.95

Free delivery - Tue, Jan 13

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Part no. 6807395

Interface Control Module BMW F10 F20 F30 Bus Unit 120 OHM 6807395

€23.95

Free delivery - Tue, Jan 13

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Part no. 7516404

BMW E60 Cable Starter Generator Alternator B+ Base Wire Harness 7516404

€23.95

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Part no. 7273666

BMW F30 F31 F32 Rear Tailgate Smart Opener Upper Antenna 7273666

€28.95

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Part no. 6875997

ICM Control Unit BMW F01 F02 LCI F06 F10 F11 F13 ECU Module 6875997

€32.95

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Part no. 9171217

BMW E93 ECU Body Control Module H1 PL2 JBBFE Junction Box 9171217

€37.95

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Part no. 9197177-1

BMW 1 Series E88 Cabrio Footwell Light Module Control Unit ECU NSW 9197177

€104.95

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Part no. 7559811

Earth Ground Cable BMW E60 E61 E63 N62N 540i 550i 650i Battery Starter Wiring

€23.95

Free delivery - Tue, Jan 13

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Part no. 4F1971687AL

Audi A6 C6 Rear Left N/S Door Harness Cable Loom 4F1971687AL

€51.95

Free delivery - Tue, Jan 13

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Part no. 9804157

BMW F20 F21 F22 F23 LCi Mid-range Sound Speaker Stereo HiFi

€23.95

Free delivery - Tue, Jan 13

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Part no. 7850599

BMW F80 M3 F82 M4 Wheel Accelerator Sensor Cable Rear Axle Suspension 7850599

€28.95

Free delivery - Tue, Jan 13

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Part no. 6963013

BMW 5 6 Series E60 E61 E63 Driver Side Door Airbag Control Unit Module 6963013

€23.95

Free delivery - Tue, Jan 13

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Showing 496-594 of 12452 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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