BMW 1-Series (E81, E82, E87, E88) fuse box and relay Diagrams (2004-2013)

The BMW 1-Series, encompassing the E81, E82, E87, and E88 models produced from 2004 to 2013, is a compact luxury car that combines performance, style, and advanced features. As with any modern vehicle, the BMW 1-Series is equipped with a sophisticated electrical system that controls various functions of the car. In this article, we will delve into the electrical components of the BMW 1-Series, focusing on the fuse box and relay diagrams with their locations, to provide valuable insights for troubleshooting electrical issues and understanding the car’s electrical architecture.

Electrical System Overview

The electrical system of the BMW 1-Series plays a critical role in delivering power to the car’s various components and ensuring their proper functioning. The fuse box and relays are fundamental elements in this system. The fuse box, typically located in the engine bay or interior cabin, contains a series of fuses that safeguard the electrical circuits from overloads and short circuits. These fuses are designed to break the circuit when excess current flows, preventing damage to the components and wiring. The relay, on the other hand, acts as an electrical switch, controlling the flow of power to different components or systems when triggered by specific conditions. It allows the car’s electrical system to distribute power efficiently and activate or deactivate certain functions as needed.

The fuse box and relay diagrams, along with their respective locations, are crucial references when diagnosing and troubleshooting electrical issues in the BMW 1-Series. These diagrams provide a visual representation of the fuse box layout, indicating the specific fuses and relays assigned to different functions and systems of the car. By referring to the diagrams and locating the corresponding fuse or relay, owners and technicians can identify potential faults, such as blown fuses or faulty relays, and take appropriate measures to rectify them. The diagrams also serve as a helpful guide for conducting maintenance tasks and ensuring that the electrical system operates smoothly and reliably.

MUST READ: DYI – How to Check Car Fuses?

(2004-2013) BMW 1-Series (E81, E82, E87, E88) fuse box and relay with Diagram

WARNING

• Never replace a fuse with one that has a higher amperage rating.
• A fuse with a too-high amperage could damage the electrical part and cause a fire.
• On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
• If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
• Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

BMW 1-Series (E81, E82, E87, E88) 2004-2013 fuse assignment

Passenger compartment

This box is located behind the glove compartment, I also call it a glove box. The protective cover must be removed for access. For more details, see the video at the end of the article. 

N54 (135i)

N52 (125i, 130i)

A6000 – Engine control module (ECM)
K6300 – DME main relay
K6319 – Valvetronic (VVT) relay
K6327 – Fuel injector relay
K6539 – Crankcase breather heating relay

N46 (118i, 120i)

N45 (116i)

M47/TU2 (118d, 120d)

In conclusion, the BMW 1-Series (E81, E82, E87, E88) from 2004 to 2013 is a remarkably compact luxury car with a sophisticated electrical system. The fuse box and relay diagrams, along with their respective locations, provide essential information for troubleshooting electrical issues and maintaining the car’s electrical components. By understanding the functions of the fuse box and relays, owners, and technicians can effectively diagnose and resolve electrical problems, ensuring the optimal performance and reliability of the BMW 1-Series. Regular inspection and maintenance of these electrical components, in accordance with the manufacturer’s recommendations, will help prevent potential issues and extend the lifespan of the car’s electrical system, ensuring a delightful driving experience for years to come.