BMW 1 3 Series E81 E87N E88 E90 E90N E91 E91N E92 E92N Fuel Tank Breather Line

The BMW E81 E87 LCI E90 Breather Hose is an original BMW fuel system component, categorized under injector nozzles. Designed for stable engine operation, it supports proper venting and vapor discharge, contributing to smooth engine performance and correct interaction with the injection system.

Specifications and technical data

• SKU: 7550399
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 13907550399
• Substitutable numbers: 13907550399, 7550399
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The BMW breather hose operates in close proximity to the injection system, making its seal and proper routing crucial for stable pressure and effective fuel vapor removal. In E81, E87 LCI, and E90 series vehicles, this component:

• stabilizes injector nozzle operating conditions by maintaining proper system venting,
• reduces the risk of fuel delivery disruptions caused by air bubbles,
• supports smooth engine operation across the full range of loads and temperatures.

Original BMW Manufacturing

As a BMW component, the breather hose is designed for specific models and injector nozzle systems, ensuring:

• factory-matched geometry for routing the hose within the engine bay,
• compatibility with original connectors and mountings used in the E81, E87 LCI, and E90 series,
• material consistency with other components of the fuel and venting system.

This allows for an organized installation without the need for modifications or additional adapters.

Condition and Service Application

The offered hose is a used BMW part, making it an attractive solution for servicing older E81, E87 LCI, and E90 series vehicles. In practice, this means the possibility of:

• economical replacement of a damaged hose while maintaining original specifications,
• restoring proper system venting without altering the injector nozzle design,
• reducing the risk of leaks in the fuel and venting line area.

Replacing the hose is particularly recommended when experiencing symptoms such as a fuel smell around the engine bay, unstable idle speed, or problems with smooth engine operation.

Technical Support and Injector System Knowledge

When diagnosing fuel system issues, it's important to consider not only the hoses but also the injector nozzles themselves. For users who want to better understand the relationship between injector condition and engine performance, we recommend the article: Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails. This provides practical knowledge for planning comprehensive fuel system servicing.

Other BMW Injector Nozzles

If you are planning a more extensive fuel system inspection and are also interested in other components from the same group, check out the available BMW injector nozzles. This will allow you to select components from the same category, optimized for specific models of this brand, and maintain the consistency of the entire system.