What is the construction and purpose of automotive electrical systems?

Automotive electrical systems are a set of components responsible for starting, charging, powering consumers, and controlling vehicle electronics. They include, among others, the battery, alternator, starter, fuses, relays, controllers, and wiring harnesses. These components are located in different parts of the car and work together through connectors and signal buses.

What are automotive electrical systems used for?

Automotive electrical systems are used to supply energy and transmit control signals to vehicle components. Thanks to them, it is possible to start the engine, charge the battery, and operate lights, windows, air conditioning, and safety systems. A fault in one circuit can affect not only comfort but also the correct operation of other modules.

What role does the wiring harness play in a car?

The wiring harness is an organized set of wires, covers, and connectors that connects individual consumers and controllers in the vehicle. It is used to transmit power, ground, and signals between modules. Its construction depends on the body version, equipment, and mounting location, so when replacing it, you must compare the wire routing, plug type, and number of pins.

How to choose an electrical part for a specific car?

The safest way is to compare the OEM number, manufacturer number, connector type, and mounting location. It is also worth considering the engine version, year of manufacture, body type, and equipment, as the same model may have different variants of the alternator, starter, or controller. In practice, verification by VIN is very helpful.

What symptoms indicate a problem with the electrical system?

Typical signals include difficulty starting, flashing warning lights, dimming lights, unstable charging, or the failure of selected consumers. In some cases, controller errors, air conditioning malfunctions, or periodic power outages also occur. Symptoms must always be linked to a specific circuit and cooperating component.

How to take care of automotive electrical systems in daily use?

The basis is regular inspection of the battery condition, terminals, ground wires, and charging. It is also good to check the tightness of housings, the condition of harness insulation, and the cleanliness of contacts exposed to moisture. A quick reaction to the first symptoms of voltage drops or electronic errors makes it easier to avoid a major failure.

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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Parktronic Module Mercedes W204 PDC Parking Sensors Control Unit A2049004106

£13.95

Audi A6 4G Keyless Entry Amplifier Control Box Module Aerial Antenna 8K0907247

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Part no. 8K0907247

Audi A6 4G Keyless Entry Amplifier Control Box Module Aerial Antenna 8K0907247

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BMW X5 E53 E60 E61 E63 E64 Petrol Engine Ping Knock Sensor 1709317

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BMW X5 E53 E60 E61 E63 E64 Petrol Engine Ping Knock Sensor 1709317

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BMW 5 Series E61 Touring Body Control Module ECU Control Unit High 9114448

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Part no. 9114448

BMW 5 Series E61 Touring Body Control Module ECU Control Unit High 9114448

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Navigation Head Unit BMW F20 F21 F30 F31 LCI F32 Radio CD Player High 2 9867503

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Mercedes W212 OM651.924 E220CDI 170HP Engine Control Unit Module ECU A6519003701

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Part no. A6519003701

Mercedes W212 OM651.924 E220CDI 170HP Engine Control Unit Module ECU A6519003701

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Mercedes-Benz C E Class W203 W211 Alarm Anti Theft System Control Module Unit

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Part no. A2118209126

Mercedes-Benz C E Class W203 W211 Alarm Anti Theft System Control Module Unit

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Audi A4 B8 A5 8T A6 C6 Battery Negative Terminal Cable Wiring Wire 8K0915181B

£13.95

BMW Mini Cooper R55 R56 R57 CCC CD DVD Navigation Sat Nav Head Unit 9185540

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Part no. 3452071-1

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Radar Sensor Mercedes W166 W176 W246 Front Control Unit Module A0009054603

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Part no. A0009054603

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Mercedes Vito W639 Door Handle Bowden Cable Catch Rear Wire A6397601804

£18.95

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

£13.95

BMW X5 E53 X3 E83 Control Unit Xenon Adaptive Headlight Ballast 6939069

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Part no. 6939069

BMW X5 E53 X3 E83 Control Unit Xenon Adaptive Headlight Ballast 6939069

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BMW E81 E87 E91 Switch Cluster Steering Column Wiper Stalk 6962678

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Part no. 6962678

BMW E81 E87 E91 Switch Cluster Steering Column Wiper Stalk 6962678

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Mercedes Sprinter W906 Fuse Box Cover Trim Panel Lid Grey A6395450003

£13.95

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Part no. 7394651

BMW 5 F11 Touring Rear Boot Trunk Lid Tailgate Control Unit Module ECU 7333928

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Mercedes W639 W906 ECU Control Unit Sensor Module Air Module A9064460542

£13.95

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Part no. 6814596

BMW 1 2 3 4 Series F20 F21 F30 F31 F32 Rain Light Solar Sensor 6814596

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Part no. 9321022-1

Mini Cooper F55 F56 F57 B+ Junction Terminal Box 300-400 W 9321022

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Radio Professional BMW E81 E87 E90 E91 LCI Autoradio CD Bluetooth 9289115

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Part no. 9289115

Radio Professional BMW E81 E87 E90 E91 LCI Autoradio CD Bluetooth 9289115

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Part no. 4H0955557

Volkswagen VW Polo 6R 5 Audi A6 C7 Air Module Crash Impact Sensor 4H0955557

£13.95

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9176078

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Mercedes W204 Door Module Rear Left N/S Control Unit Module A2048702426

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Part no. A2048702426

Mercedes W204 Door Module Rear Left N/S Control Unit Module A2048702426

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Mercedes W447 Drive Train Sensor Can Distributor A0045467740

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Part no. A0045467740

Mercedes W447 Drive Train Sensor Can Distributor A0045467740

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BMW E60 E61 LCI M-ASK M-Audio Navigation System Controller Player 9195756

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Part no. 9195756

BMW E60 E61 LCI M-ASK M-Audio Navigation System Controller Player 9195756

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Mercedes ML W164 Door Module Front Left N/S Control Unit Module A1648209385

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Part no. A1648209385

Mercedes ML W164 Door Module Front Left N/S Control Unit Module A1648209385

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Mercedes W176 Air Module Belts System Control Unit ECU Bosch A1179009200

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Part no. A1179009200

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Mercedes A B W169 W245 Front Left N/S Suspension Control Track Arm A1693300907

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Part no. A1693300907-1

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Mini Cooper F55 F56 F57 Visual Boost Surround Central Cover Instrument 9367673

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Part no. 9367673

Mini Cooper F55 F56 F57 Visual Boost Surround Central Cover Instrument 9367673

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BMW X5 E53 E60 E65 X3 E83 Adaptive Headlight ECU Control Unit 6934122

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Part no. 6934122

BMW X5 E53 E60 E65 X3 E83 Adaptive Headlight ECU Control Unit 6934122

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BMW F30 REM Rear Electronic Module Fuse Box Control Unit V2 9293307

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Part no. 9293307

BMW F30 REM Rear Electronic Module Fuse Box Control Unit V2 9293307

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Mercedes W205 Head Unit Radio CD Player Audio Sat Nav Multimedia A2059003729

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Part no. A2059003729

Mercedes W205 Head Unit Radio CD Player Audio Sat Nav Multimedia A2059003729

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BMW F20 F30 Mini F55 F56 Control Unit Air Conditioning Module 6820235

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Part no. 6820235

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Head Unit BMW F20 F21 F30 Radio Professional CD Player Control Module 9341078

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BMW F30 F80 M3 Battery Cover Trunk Trim Panel Right Boot 7239175

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Part no. 7239175-1

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BMW 7 F01 LCI On-Board Central Information Display Screen Monitor 10,25" 9284970

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Part no. rhd-9284970

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Part no. 6938064

BMW E65 E66 E67 Amplifier Rear Window Antenna Amplifier Module 868MHZ

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Mercedes W204 PDC Sensor Wiring Loom Harness Front Bumper A2044400035

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Part no. A2044400035

Mercedes W204 PDC Sensor Wiring Loom Harness Front Bumper A2044400035

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BMW X1 E84 Front Door Handle Bowden Pull Cable Wiring 2990415

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Part no. 2990415

BMW X1 E84 Front Door Handle Bowden Pull Cable Wiring 2990415

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Part no. A2048702626

Door Module Mercedes W204 Rear Right O/S Control Unit Module A2048702626

£13.95

BMW X5 X6 E70 E71 Air Module Control ECU Unit Module 9171948 0285010250

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Part no. 9171948

BMW X5 X6 E70 E71 Air Module Control ECU Unit Module 9171948 0285010250

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BMW Z4 E85 2.0i N46 150HP Engine Control Unit ECU DME Manual 7565300

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Part no. 7565300

BMW Z4 E85 2.0i N46 150HP Engine Control Unit ECU DME Manual 7565300

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Part no. A2038219751-2

Mercedes W203 CL203 Roof Alarm Motion Sensor Cover Trim Black A2038219751

£13.95

Mercedes A-Class W169 Battery Lead Wire Cable Negative A0009050054

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Part no. A0009050054

Mercedes A-Class W169 Battery Lead Wire Cable Negative A0009050054

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BMW E60 E61 E63 E81 E87 E90 E91 DAB Radio Tuner Module 9119355

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Part no. RHD-1K8971121S

Volkswagen VW Scirocco Mk3 Passenger Door Wiring Harness Loom Cable 1K8971121S

£28.95

BMW 7 Series E65 E66 E67 Steering Column Control Unit CIM Module

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Part no. 6788716

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BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9395173

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BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9395173

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Mini Cooper S R56 LCI N18 184HP ECU Kit Control Unit DME 7613226 CAS Key Manual

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BMW E82 E88 E92 E93 LCI Accelerating Sensor 9244144

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Part no. 9244144

BMW E82 E88 E92 E93 LCI Accelerating Sensor 9244144

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BMW 1 3 Series F20 F30 F31 LCI Line Cable Power Distribution Module 8624382

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Part no. 8624382

BMW 1 3 Series F20 F30 F31 LCI Line Cable Power Distribution Module 8624382

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£18.95

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

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Part no. A1779009902

Mercedes W177 Front Windscreen Windshield Camera Multi Purpose Unit A1779009902

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Mercedes-Benz W906 313 CDI OM651 Diesel Engine Control Unit CRD ECU A6519000601

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Mercedes-Benz W906 313 CDI OM651 Diesel Engine Control Unit CRD ECU A6519000601

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Cable Wire BMW E60 E61 E81 E87 E90 Tubing For Clamp 7537365

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Part no. 7537365

Cable Wire BMW E60 E61 E81 E87 E90 Tubing For Clamp 7537365

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BMW 5 6 Series E60 E61 E63 E64 Actuator Air Distribution Flap Matrix Heater

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Part no. 6942990

BMW 5 6 Series E60 E61 E63 E64 Actuator Air Distribution Flap Matrix Heater

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Mercedes W204 Door Module Control Unit Module Front Right O/S A2048702126

£13.95

Fuse Box BMW F20 F21 F30 F31 F34 Power Distribution Front 9389068

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Part no. 9389068

Fuse Box BMW F20 F21 F30 F31 F34 Power Distribution Front 9389068

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Part no. RHD-9292246-1

Display Screen BMW F20 F21 F22 Central Information Infotainment 8,8" 9387548

£237.95

BMW Mini Cooper S R55 R56 Automatic Gearbox ECU Control Unit EGS Module 7600562

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Part no. 7600562

BMW Mini Cooper S R55 R56 Automatic Gearbox ECU Control Unit EGS Module 7600562

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Part no. 4F0035061D

Audi A4 A5 A6 Q5 Q7 Radio Control Head Unit Harman Becker 4F0035061D

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Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

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Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

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BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

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Part no. 7075944-2

BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

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Part no. A2048207785

Mercedes W204 Rear Left Door N/S Control Unit Module A2048207785

£13.95

BMW E87 E90 Navigation System Professional CCC Navi Controller 6987692

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BMW E87 E90 Navigation System Professional CCC Navi Controller 6987692

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BMW 6 Series E63 E64 F06 F12 F13 Aerial Antenna Amplifier Module Left N/S

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Part no. 6957347

BMW 6 Series E63 E64 F06 F12 F13 Aerial Antenna Amplifier Module Left N/S

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BMW F30 Seat Control Unit Seat Module Unit Controller ECU 9371130

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Part no. 9371130

BMW F30 Seat Control Unit Seat Module Unit Controller ECU 9371130

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Mini R55 R56 Electric Window Lifter Actuator Motor Door Left N/S 2753721

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Part no. 2753721

Mini R55 R56 Electric Window Lifter Actuator Motor Door Left N/S 2753721

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BMW X5 E53 X3 E83 Control Unit Sliding Lifting Roof Panorama 6955925

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Part no. 6955925

BMW X5 E53 X3 E83 Control Unit Sliding Lifting Roof Panorama 6955925

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Part no. A1715450032

Mercedes SLK R171 PDC Parking Distance Control Unit Module Sensor A1715450032

£13.95

Airbag Module Mini F55 F56 F60 BMW X1 F48 F45 ECU Control Unit Air Bag 6818814

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Part no. 6818814

Airbag Module Mini F55 F56 F60 BMW X1 F48 F45 ECU Control Unit Air Bag 6818814

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BMW E60 Hands Free Electronics Charging MULF 6946393 84216946393

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BMW E60 Hands Free Electronics Charging MULF 6946393 84216946393

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BMW E60 E61 Navigation Head Unit CCC CD Sat Nav Player System Controller 9159028

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Part no. A6397602004

Bowden Cable Mercedes W639 Rear Right O/S Sliding Door Handle Catch A6397602004

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BMW F10 F20 F30 Head Unit Media Navigation Headunit Player 9342033

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Part no. 9342033

BMW F10 F20 F30 Head Unit Media Navigation Headunit Player 9342033

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VW Golf MK5 6 Audi A3 8P Positive Battery Terminal Cable 1K0971228L

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

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BMW E87 E90 E90N E91 E92 E93 Alternator Generator Diesel 7802471

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BMW E87 E90 E90N E91 E92 E93 Alternator Generator Diesel 7802471

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BMW X5 E70 LCI Footwell Light Control Module Unit Lear FRM3R XE 9287250

£85.95

Radio Head Unit Ford Transit 6000 CD Media Player Unit 8C1T-18C815-AD

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

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

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Audi A1 8X Q3 8U Central Gateway Control Unit Module Relay ECU 8U0907468AC

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Mercedes C118 W177 W247 M260 Petrol Engine Starter Motor 12V A2609060100

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Part no. A2609060100

Mercedes C118 W177 W247 M260 Petrol Engine Starter Motor 12V A2609060100

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BMW MINI Cooper Cabrio Convertible R52 Rear Bumper PDC Cables Wiring Loom Set

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Part no. 6956020

BMW MINI Cooper Cabrio Convertible R52 Rear Bumper PDC Cables Wiring Loom Set

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Mercedes W204 Head Unit Radio CD Player Audio Sat Nav Control A2049001813

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Part no. A2049001813

Mercedes W204 Head Unit Radio CD Player Audio Sat Nav Control A2049001813

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Mercedes W204 CD Player Radio Stereo Navigation Sat Nav Head Unit A2049009410

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Part no. A2049009410

Mercedes W204 CD Player Radio Stereo Navigation Sat Nav Head Unit A2049009410

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BMW 7 Series E65 E66 Fuse Board Power Distribution Box

-5%

Part no. 6900582

BMW 7 Series E65 E66 Fuse Board Power Distribution Box

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Part no. A0035422319

Mercedes W176 W246 Relay Battery Decoupling 12V A0035422319

£13.95

BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

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BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

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Mercedes ML W164 Radio Player Audio Stereo CD Player Head Unit A1648202679

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Part no. A1648202679

Mercedes ML W164 Radio Player Audio Stereo CD Player Head Unit A1648202679

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Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 Key Automatic

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Part no. 7641003-2

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 Key Automatic

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Control Unit BMW F01 F02 F07 Air Suspension Control Module ECU 6860385

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Part no. 6860385

Control Unit BMW F01 F02 F07 Air Suspension Control Module ECU 6860385

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Part no. A2129009505

Mercedes W212 PDC Parking Distance Control Unit Module Sensor A2129009505

£13.95

Audi A4 B9 A5 F5 Air Module Pedestrian Protection Sensor Crash 8W0959121A

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Audi A4 B9 A5 F5 Air Module Pedestrian Protection Sensor Crash 8W0959121A

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Audi A3 8P Sat Navi Stereo Radio Audio MMI Head Unit CD Player Unit 8P0035152C

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Part no. 8P0035152C

Audi A3 8P Sat Navi Stereo Radio Audio MMI Head Unit CD Player Unit 8P0035152C

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Part no. 8K0907801L

Audi S5 8T Parking Electric Brake Handbrake Module Control Unit 8K0907801L

£18.95

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

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Part no. 9128602

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

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Mercedes SLK R171 Fuse Box Cover Trim Panel Lid Housing A1715400182

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Part no. rhd-A1715400182

Mercedes SLK R171 Fuse Box Cover Trim Panel Lid Housing A1715400182

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BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9167202

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Part no. 9167202

BMW E60 E61 LCI E63 E64 Body Gateway Module ECU Control Unit 9167202

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