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

Find it faster

Match to your vehicle

Make

Mercedes C219 Fuse Box Control Unit SAM Module A2115457001

Product currently unavailable

Part no. A6395450601

Mercedes Vito W639 SAM Module Electric Control Unit A6395450601

Product currently unavailable

Part no. A2129008825

Mercedes C204 Fuse Box Control Unit SAM Module Relay A2129008825

Product currently unavailable

Part no. A2129002927

Fuse Box Mercedes SL R231 CLS C218 Fuse Relay Box Sam Control Module A2129002927

Product currently unavailable

Part no. A9065452601

Mercedes Sprinter W906 Fuse Box Relay SAM Module Control Unit A9065452601

Product currently unavailable

Part no. A9065452101

Fuse Box Mercedes Sprinter W906 SAM Control Unit Module A9065452101

Product currently unavailable

Part no. A2035454501

Mercedes W203 Fuse Box SAM Control Unit Module Relay A2035454501

Product currently unavailable

Part no. A2129003814

Fuse Box Mercedes W204 W212 Front Relay Control Unit Module SAM A2129003814

Product currently unavailable

Part no. A2215402250

Mercedes W221 SAM Relay Fuse Box Module Control Unit ECU A2215402250

Product currently unavailable

Part no. A2219067200

Mercedes W221 Fuse Box Control Unit SAM Module Relay A2219067200

Product currently unavailable

Part no. A9015450119-1

Fuse Holder Mercedes Sprinter W906 Electrical Fuse Box Bracket A9015450119

Product currently unavailable

Part no. A2139062202

Mercedes W213 W222 Fuse Box Rear Electrical Fuse Unit Module A2139062202

Product currently unavailable

Part no. A4475401440

Mercedes Vito W447 Fuse Box Relay Control Unit Module A4475401440

Product currently unavailable

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2059007037

-40%

Part no. A2059007037

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2059007037

Product currently unavailable

Part no. A2129006212

SAM Module Mercedes W204 W212 Control Unit Electrical Fuse Box Unit A2129006212

Product currently unavailable

Part no. A2215401682

Mercedes W221 Cover Fuse Box Case Trim Panel Lid A2215401682

Product currently unavailable

Part no. A1715450001

Mercedes SLK R171 Fuse Box Relay Control Unit Electric Module SAM A1715450001

Product currently unavailable

Part no. A2075401550-1

Mercedes W204 Battery Fuse Box Positive Distribution Terminal A2075401550

Product currently unavailable

Part no. A2095452301

Mercedes W209 Convertible Fuse Box Rear SAM Module Control Unit A2095452301

Product currently unavailable

Part no. A2035454201

Mercedes W203 C209 SAM Control Unit Module Fuse Box Front A2035454201

Product currently unavailable

Part no. A2075401850

Fuse Box Mercedes W204 Battery Terminal Control Unit Module A2075401850

Product currently unavailable

Part no. rhd-A2215400750

Mercedes C216 W221 Front Fuse Box Relay Control Unit SAM ECU Module A2215400750

Product currently unavailable

Part no. A2045456201

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2045456201

Product currently unavailable

Part no. A2129004025

Mercedes W212 Fuse Box Relay Control Unit Module SAM A2129004025

Product currently unavailable

Part no. A2045450169

Mercedes W204 SAM Module Fuse Box Relay Control Unit A2045450169

Product currently unavailable

Part no. A6399005400-2

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

Product currently unavailable

Part no. A2119820402

Mercedes CLS W219 Battery Fuse Box Control Unit Module A2119820402

Product currently unavailable

Part no. A2129008507

Mercedes W212 Front Fuse Box SAM Relay Control Unit Module A2129008507

Product currently unavailable

Part no. A2095451701-1

Mercedes A209 Fuse Box SAM Control Module Relay Box A2095451701

Product currently unavailable

Part no. rhd-A2035400250-1

Mercedes W203 W209 W639 Fuse Box Distribution Dashboard A2035400250

Product currently unavailable

Part no. A2049060105-2

Mercedes W204 SAM Control Unit Module Fuse Box Relay Rear A2049060105

Product currently unavailable

Part no. A9015400150

Fuse Box Mercedes Sprinter W901 W902 W903 W904 Relay Control Unit A9015400150

Product currently unavailable

Part no. A2129003922

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

Product currently unavailable

Part no. A2129003702-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003702

Product currently unavailable

Part no. A0035421819

Mercedes C205 Fuse Box Relay Control Unit Module A0035421819

Product currently unavailable

Part no. rhd-A2055407011

Mercedes W205 Front Relay Power Fuse Box Control Unit Module A2055407011

Product currently unavailable

Part no. A2095451401

Fuse Box Mercedes CLK W203 W209 Front SAM Module Control Unit A2095451401

Product currently unavailable

Part no. A6399005400-1

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

Product currently unavailable

Part no. A1645400350-1

Mercedes ML W164 Fuse Prefuse Box Jump Start Terminal A1645400350

Product currently unavailable

Part no. A2219007202

Mercedes-Benz S-Class W221 Front Fuse Box Control Unit Module SAM A2219007202

Product currently unavailable

Part no. A2129009605

Fuse Box Mercedes W204 W212 Diesel Front Sam Control Module Unit A2129009605

Product currently unavailable

Part no. A2049060205-4

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

Product currently unavailable

Part no. A2129007024

Mercedes CLS C218 Front Fuse Relay Box On Board Supply A2129007024

Product currently unavailable

Part no. A2035453801-1

Mercedes W203 W209 Fuse Box Rear SAM Module Relay Control Unit A2035453801

Product currently unavailable

Part no. rhd-A2055402250

Mercedes W205 Fuse Box Relay Control Module Battery Terminal A2055402250

Product currently unavailable

Part no. A2129060105

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129060105

Product currently unavailable

Part no. rhd-A2215400324

Mercedes-Benz S-Class W221 Fuse Relay Electrical Box Storage A2215400324

Product currently unavailable

Part no. A2075402950

Mercedes W204 Power Distribiuton Battery Fuse Box Control Unit ECU A2075402950

Product currently unavailable

Part no. A9015400350

Mercedes Sprinter W903 Fuse Box Relay Electrical Box Unit A9015400350

Product currently unavailable

Part no. A2115455101

Mercedes W211 Trunk Fuse Box Electric Base Relay Box SAM Module A2115455101

Product currently unavailable

Part no. A2105400072

Fuse Box Mercedes W210 R170 Multifunctional Relay Fuse Unit Module A2105400072

Product currently unavailable

Part no. A1695456332

Control Unit Mercedes W169 W245 SAM Module Relay Fuse Box A1695456332

Product currently unavailable

Part no. A1645407662

SAM Module Mercedes Ml W164 Fuse Box Front Relay Control Unit A1645407662

Product currently unavailable

Part no. A2116842518

Mercedes-Benz E-Class S211 Trim Cover Battery Anthracite A2116842518

Product currently unavailable

Part no. A2095451701

Mercedes A209 Fuse Box SAM Control Module Relay Box A2095451701

Product currently unavailable

Part no. A1645401801

Mercedes ML W164 Rear Control Unit Module Fuse Box SAM A1645401801

Product currently unavailable

Part no. A1645400272

Fuse Box Mercedes ML W164 GL X164 Control Unit Module Relay A1645400272

Product currently unavailable

Part no. A9065400350

Mercedes Sprinter W906 Fuse Box Relay Electrical Rifle Box Unit A9065400350

Product currently unavailable

Part no. A2075844181

Mercedes C207 Fuse Box Grouping Fuse Placement Map Card Diagram A2075844181

Product currently unavailable

Part no. A2129003922-1

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129003922

Product currently unavailable

Part no. A2115453101

Mercedes W211 Fuse Box Control Unit SAM Module Relay A2115453101

Product currently unavailable

Part no. A1669068201

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

Product currently unavailable

Part no. rhd-A2045400124

Mercedes-Benz C-Class W204 Fuse Box Housing Cover A2045400124

Product currently unavailable

Part no. A2129008207

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

Product currently unavailable

Part no. A2125406950

Mercedes W212 SAM Fuse Prefuse Box Relay Control Unit A2125406950

Product currently unavailable

Part no. A2129001306

Mercedes W212 Fuse Box Rear SAM Relay Control Unit Module A2129001306

Product currently unavailable

Part no. A2045404150

Fuse Box Mercedes W204 W212 SAM Relay Control Unit Module A2045404150

Product currently unavailable

Part no. A2129004500

Mercedes C207 W212 Fuse Box Relay Control Unit SAM Module A2129004500

Product currently unavailable

Part no. A1715451001-1

Mercedes SLK R171 Fuse Box SAM Relay Control Unit Module A1715451001

Product currently unavailable

Part no. A0025422319

Mercedes-Benz Universal HELLA Relay Module 12V 4RA 940 010 A0025422319

Product currently unavailable

Part no. A2129002627

Mercedes W212 Fuse Box Relay Module Control Unit A2129002627

Product currently unavailable

Part no. A6395400182-1

Mercedes Vito W639 Cover Fuse Box Case Trim Panel Lid A6395400182

Product currently unavailable

Part no. A2049067702-1

Mercedes W204 Fuse Box Rear SAM Module Electrical Fuse Unit A2049067702

Product currently unavailable

Part no. A6395450601-1

Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450601

Product currently unavailable

Part no. A1775404507-1

Mercedes V177 C118 W247 Fuse Box Relay Control Unit Module A177540457

Product currently unavailable

Part no. A2055402350

Mercedes A205 W247 Battery Fuse Box Positive Distribution Terminal A2055402350

Product currently unavailable

Part no. A2129003514

Mercedes W204 Sam Unit Fuse Box Control Module A2129003514

Product currently unavailable

Part no. A1645450303

Mercedes W166 Junction Fuse Block Cover Trim Positive Terminal A1645450303

Product currently unavailable

Part no. A2129000023

Mercedes A207 Fuse Box Relay Rear SAM Control Unit Module A2129000023

Product currently unavailable

Part no. A1695405545

*Mercedes-Benz A-Class W169 Body Control Unit Module SAM A1695405545

Product currently unavailable

Part no. A1665402450

Mercedes ML W166 Fuse Box Front Relay Control Unit Module A1665402450

Product currently unavailable

Part no. A2045842982

Mercedes W204 Fuse Box Grouping Fuse Placement Map Card Diagram A2045842982

Product currently unavailable

Part no. A1645400701

Mercedes ML W164 Rear SAM Module Control Unit Fuse Box A1645400701

Product currently unavailable

Part no. A1645402972

Mercedes W164 Fuse Box Holder A1645402972

Product currently unavailable

Part no. A1635400182

Mercedes-Benz ML-Class W163 Fuse Box Lid Cover Box Trim A1635400182

Product currently unavailable

Part no. A0005460373

Mercedes-Benz E S R Class W211 W221 W251 Replacement Fuse Kit A0005460373

Product currently unavailable

Part no. A1645408101

SAM Control Module Mercedes W164 W251 Comfort Fuse Box Unit A1645408101

Product currently unavailable

Part no. A2129005622-1

Mercedes W204 Front Fuse Box Relay Control Unit SAM Module A2129005622

Product currently unavailable

Part no. A2049009701

Mercedes W204 Front Fuse Box Relay Control Unit SAM Module A2049009701

Product currently unavailable

Part no. A2129009908

Mercedes SLK R172 Fuse Box Relay Control Unit SAM Module A2129009908

Product currently unavailable

Part no. A1645403272

Mercedes ML W164 Fuse Box Relay Control Unit Module A1645403272

Product currently unavailable

Part no. A2129007324

Mercedes SLK R171 Petrol M271 Fuse Box SAM Relay Control Module A2129007324

Product currently unavailable

Part no. A2035450301

Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

Product currently unavailable

Part no. A1645407562

Mercedes W164 Front Fuse Box Relay Control Unit SAM Module A1645407562

Product currently unavailable

Part no. A4475460064

Mercedes W447 Fuse Box Module Cover Trim Trunk A4475460064

Product currently unavailable

Part no. A2465403803-1

Mercedes W117 W156 W176 W242 W246 Electrical Fuse Relay Box A2465403803

Product currently unavailable

Part no. A2115456101

Mercedes W211 SAM Module Fuse Box Relay Control Unit A2115456101

Product currently unavailable

Mercedes-Benz S-Class W221 Fuse Box Control Unit Module SAM A2219067300

-40%

Part no. A2219067300

Mercedes-Benz S-Class W221 Fuse Box Control Unit Module SAM A2219067300

Product currently unavailable

Part no. A1775404507

Mercedes V177 C118 W247 Fuse Box Relay Control Unit Module A1775404507

Product currently unavailable

...

Showing 397-495 of 717 products