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.

More information

Make

Mercedes-Benz A B Class W176 W246 Diesel Fuse Box Relay Unit A2465402150

Product currently unavailable

Part no. A1685400082

Mercedes-Benz A-Class W168 Control Box Unit Cover Front A1685400082

Product currently unavailable

Part no. A2049067702-1

Mercedes W204 Fuse Box Rear SAM Module Electrical Fuse Unit A2049067702

Product currently unavailable

Part no. A2215403050-1

Mercedes W221 Rear SAM Fuse Box Power Distribution Control Unit A2215403050

Product currently unavailable

Part no. A2515400524

Mercedes W251 Fuse Relay Electrical Box Housing Cover A2515400524

Product currently unavailable

Part no. A2045458201

Mercedes W204 Rear Fuse Box Relay SAM Control Unit Module A2045458201

Product currently unavailable

Part no. A1695454332-1

Mercedes W169 W245 SAM Control Module Fuse Box Unit A1695454332

Product currently unavailable

Part no. A2129000006

Fuse Box Mercedes W212 Front Relay Control Unit Electric Module SAM A2129000006

Product currently unavailable

Part no. A1645400272-1

Mercedes W164 W251 Fuse Box Control Unit Module Relay A1645400272

Product currently unavailable

Part no. A2129008207

Mercedes W204 C200 Fuse Box Front SAM Control Module Relay Box A2129008207

Product currently unavailable

Part no. A2129005622

Mercedes W204 Front Fuse Box Relay Control Unit SAM Module A2129005622

Product currently unavailable

Part no. A0005400950

Fuse Box Mercedes Sprinter W901 W902 W903 W904 Relay Control Unit A0005400950

Product currently unavailable

Part no. A2035400050-1

Mercedes SLK R171 W203 W209 Front Fuse Box Relay Control Unit A2035400050

Product currently unavailable

Part no. A1695405645

Mercedes W169 SAM Control Module Fuse Box Unit A1695405645

Product currently unavailable

Part no. A2129004222-1

Mercedes W207 A207 SAM Control Unit Module Fuse Box Rear A2129004222

Product currently unavailable

Part no. lhd-A2215400224

Mercedes W221 S500 OM273 Fuse Relay Box Module Housing Cover A2215400224

Product currently unavailable

Part no. A2129006924

Mercedes W207 W212 SAM Module Fuse Box Relay Control Unit A2129006924

Product currently unavailable

Part no. A2319007707

Mercedes W204 Fuse Box Relay Control Unit Electric Module SAM A2319007707

Product currently unavailable

Part no. A2035454101

Mercedes W203 Front SAM Control Unit Module Fuse Box A2035454101

Product currently unavailable

Part no. A1669068201

Fuse Box Mercedes GLE W166 C292 W463 Relay Control Unit Module A1669068201

Product currently unavailable

Part no. A1699010100-1

Fuse Box Mercedes W169 W245 Sam Control Module Unit ECU A1699010100

Product currently unavailable

Part no. A2115459301-1

Mercedes W211 W219 Fuse Box Rear SAM Module Electrical Fuse Unit A2115459301

Product currently unavailable

Part no. A2129000004-2

SAM Module Mercedes W212 Fuse Box Relay Control Unit A2129000004

Product currently unavailable

Part no. A1405400282

Mercedes C140 Fuse Box Relay Cover Lid Control Unit Bracket Trim A1405400282

Product currently unavailable

Part no. A1715450101

Mercedes SLK R171 Fuse Box SAM Relay Control Unit Module A1715450101

Product currently unavailable

Part no. A2129001306

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129001306

Product currently unavailable

Part no. A2125400080

Mercedes W212 Fuse Box Housing Relay Unit Module A2125400080

Product currently unavailable

Part no. A2075402550

Mercedes W204 W207 Fuse Box Prefuse Box Module Relay Holder A2075402550

Product currently unavailable

Part no. A1715451301-1

Mercedes SLK R171 Roadster Fuse Box Control Unit SAM Module Relay A1715451301

Product currently unavailable

Part no. A6395450601-1

Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450601

Product currently unavailable

Part no. A2129001606

Mercedes S212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129001606

Product currently unavailable

Part no. A2129008107

Mercedes W204 Front SAM Fuse Relay Box Control Unit Module A2129008107

Product currently unavailable

Part no. A2469068601-1

Mercedes W176 W246 Battery Junction Block Battery Plus Pole A2469068601

Product currently unavailable

Part no. A2129009425-1

Mercedes SLK R172 Fuse Box Relay Control Unit SAM Module A2129009425

Product currently unavailable

Part no. A2129004830

Mercedes SLK R172 W212 Rear Fuse Box SAM Relay Control Unit Module A2129004830

Product currently unavailable

Part no. A2035450701

Mercedes W203 Fuse Box Rear SAM Module Relay Control Unit A2035450701

Product currently unavailable

Part no. A2129005712

Mercedes W204 Front Fuse Box Relay Module Sam Control A2129005712

Product currently unavailable

Part no. A1715451701

Mercedes SLK R171 Fuse Box SAM Relay Control Unit Module A1715451701

Product currently unavailable

Part no. A2035454501

Mercedes W203 Fuse Box SAM Control Unit Module Relay A2035454501

Product currently unavailable

Part no. A2035452901

Mercedes-Benz C-Class W203 Fuse Box Control Unit Module SAM A2035452901

Product currently unavailable

Part no. A1645408101

SAM Control Module Mercedes W164 W251 Comfort Fuse Box Unit A1645408101

Product currently unavailable

Part no. A1685453340

Mercedes-Benz A-Class W168 Fuse Box Unit Holder Bracket Frame A1685453340

Product currently unavailable

Part no. A2139003029

Mercedes A238 Fuse Box Control Unit SAM Module Relay A2139003029

Product currently unavailable

Part no. A2479061803

Mercedes W177 W247 Battery Fuse Box Positive Distribution Terminal A2479061803

Product currently unavailable

Part no. A1645403472

Mercedes W164 Fuse Box Relay Module Unit A1645403472

Product currently unavailable

Part no. A0345459432

Mercedes CL C215 W220 Sam Control Module Fuse Box Unit A0345459432

Product currently unavailable

Part no. A1645402401

Mercedes W164 Front Fuse Box SAM Relay Control Unit Module A1645402401

Product currently unavailable

Part no. A2049000902-1

Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module A2049000902

Product currently unavailable

Part no. A2129006624

Fuse Box Mercedes W204 Front Relay Control Unit Module SAM A2129006624

Product currently unavailable

Part no. A2049006709

Mercedes W204 Fuse Box Relay Control Unit Electric Module SAM A2049006709

Product currently unavailable

...

Showing 397-446 of 446 products