What is the construction and purpose of fuses and fuse boxes?

Fuses and fuse boxes are components of a car's electrical installation responsible for protection and power distribution to individual circuits. A typical fuse contains a fusible link with a specific current rating, and a fuse box has sockets, connectors, circuit descriptions, and often spaces for relays. These elements are mounted in the cabin, engine compartment, or trunk, depending on the vehicle version.

What are fuses and fuse boxes used for?

Fuses and fuse boxes are used to protect wires and power consumers from the effects of overloads and short circuits. Their task is also to organize electrical circuits, which facilitates diagnostics and replacement of a damaged element. Without efficient protection, a failure in one circuit can affect the operation of lights, radio, air conditioning, or control modules.

What is the construction and function of a car electrical relay?

A car electrical relay is a control element that uses a small current to switch a higher-load circuit on or off. It usually consists of a housing, a coil, working contacts, and terminals fitting into a socket in the box. The cooperation of the relay with the fuse box allows for proper power supply to systems such as fans, heating, or selected comfort modules.

How to choose the right fuse box for a car?

It is best to compare the OEM part number, interchangeable numbers, mounting location on the vehicle, and connector type. It is also worth checking the engine version, equipment, and any differences between pre-facelift and post-facelift models. For boxes integrated with relays, the completeness of the relay configuration and pin layout compatibility are also important.

What symptoms indicate a problem with a fuse or fuse box?

A typical symptom is the sudden failure of one device or a whole group of consumers, for example, lights, wipers, or the radio. In the case of a fuse box, there may be power interruptions, traces of overheating, corroded contacts, or loose sockets. Repeated fuse blowing usually means that you also need to check the installation and the component powered by the given circuit.

How to maintain fuses and fuse boxes after installation?

After installation, it is worth periodically checking the cleanliness of the housing, the condition of the cover, and the absence of moisture traces at the connectors. Do not replace a fuse with an element of a higher rating than specified by the manufacturer. It is also good practice to compare the circuit description with the actual car equipment after every major installation repair.

Fuses and fuse boxes

At Global Parts, we offer a wide selection of original used car parts, including fuses and fuse boxes for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our fuses and fuse boxes undergo quality control to ensure you receive a top-quality product.

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Audi A4 B8 A5 8T A6 C7 Q5 8R Fuse Box Relay Module Connector Plug 8K0937501

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775404307-1

Fuse Box Mercedes C118 W177 Engine Compartment Relay Box Module A1775404307

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M5T-14A124-AA

Ford Focus Mk2 C-Max Body Control Module Fuse Box Bracket Holder 4M5T-14A124-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6395450203

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2S6T-14A076-BA

Ford B-Max Fiesta Mk6 Fuse Box Cover Housing Lid Trim Cap 2S6T-14A076-BA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465451440

Mercedes W176 Fuse Relay Box Cover Cap Top Trim Lid A2465451440

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465401350-1

Mercedes W156 W176 W246 Fuse Box Front Relay Control Unit Module A2465401350

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9075407312

Mercedes W907 Battery Fuse Box Positive Distribution Terminal A2479061803

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C1T-14A067-AA

Ford Transit Mk7 Battery Fuse Box Relay Wiring 6C1T-14A067-AA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8367094

BMW E65 Fuse Box Relay Unit Control Module Connector Box 8367094

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1695453740

Mercedes-Benz A-Class W169 Fuse Box Unit Holder Bracket Frame A1695453740

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9330542

BMW G30 G31 Fuse Distribution Box Holder Control Unit Bracket Carrier 9330542

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9234421-1

BMW F01 F02 F04 F06 F07 F10 Front Power Distribution Fuse Box 9234421

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C1T-14A067-AB-2

Ford Transit Mk7 Fuse Box Relay Housing Electrical Unit 2.2 TDCi 6C1T-14A067-AB

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0907361D

Skoda Superb Mk3 3V Fuse Box Relay Control Unit Module 5Q0907361D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059068501

Mercedes W205 Fuse Box Rear Relay Electrical Control Unit Box A2059068501

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465410905

Mercedes W176 W246 C117 X156 Battery Fuse Relay Box Top Cover Trim A2465410905

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2075844181

Mercedes C207 Fuse Box Grouping Fuse Placement Map Card Diagram A2075844181

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BV6N-14A073-DR

Ford Focus Mk3 Body Control Module Fuse Box Control Unit BV6N-14A073-DR

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

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BMW E87 E90 E91 Power Distribution Fuse Box Front 6906624

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BMW F10 F20 F30 Integrated Relay Power Supply Module Distribution Box 7633242

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BMW E81 E82 E84 E87 E88 E90 E91 E92 Power Distribution Box 6936649

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Mercedes W906 Fuse Box Relay Control Unit Electric Module SAM A9069003502

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BMW E87 E90 E91 E92 Front Power Distribution Fuse Box 6906622

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Mercedes Vito W639 Fuse Box Relay Control Unit Electric Module SAM A6399005400

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