BMW 1 3 Series F20 F21 F30 LCI M140i 340i B58 Fuel Tank Breather Line Pipe Hose

The BMW 1 and 3 Series F20 F21 F30 LCI M140i 340i B58 Fuel Tank Breather Line is an original fuel system component, specifically designed for the B58 engine. With a precise fit for the factory BMW installation, it ensures stable fuel vapor management and proper integration with other system components. This is a solution for users who expect consistency with the factory design and want to maintain the original engine performance characteristics.

Specifications and technical data

• SKU: 7643104
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643104
• Substitutable numbers: 13907643104, 7643104, EM
• Category: Hoses, Lines & Pipes

Purpose and Technical Function

The offered fuel tank breather line is a part from the Lines, Hoses, and Pipes group, responsible for the controlled flow of fuel vapors between the tank and other system sub-assemblies. In BMW 1 Series F20/F21 and 3 Series F30 LCI models with the B58 engine (M140i, 340i), a properly functioning breather line is crucial for:

• maintaining correct fuel tank pressure,
• stable fuel supply system operation under varying engine loads,
• reducing fuel vapor emissions into the environment.

The original geometry and connector diameters facilitate a leak-free installation and proper cooperation with factory quick connectors and body mounting points.

Construction and Fitment for BMW B58

The line has been designed for specific routing within the BMW engine bay and chassis, making it easy to install in the original mounting points. This ensures:

• minimizing the risk of chafing and unwanted vibrations,
• maintaining the factory routing of the line relative to the tank, body, and exhaust system components,
• a predictable installation process for mechanics familiar with the BMW F20/F21/F30 LCI construction.

The appropriately selected material flexibility of the line helps compensate for body and powertrain movements, which is important for the dynamic operation of M140i and 340i models.

Component Condition and Service Application

The offered line is a used aftermarket part, allowing for an economical repair of the breather system while maintaining original BMW specifications. This type of part is particularly suitable for situations where:

• the existing line has suffered mechanical damage (cracks, abrasions, leaks),
• diagnostic errors related to the fuel tank breather system are present,
• the component needs replacement as part of a broader fuel system service.

Using an original part from a dismantled vehicle allows for the preservation of factory flow parameters and system operating characteristics, which is essential for the precisely tuned B58 engines.

Benefits of Choosing an Original BMW Line

By choosing this breather line, you gain:

• factory fitment for specific BMW 1 and 3 Series models with the B58 engine,
• consistency with the original fuel system architecture,
• the possibility of reducing service costs while retaining an OEM component.

If you are interested in a broader context of using parts from dismantled vehicles and the impact of such choices on the environment and your budget, it is worth reading the article Circular Economy in Your Garage – How Choosing Used Dismantled Parts Truly Supports Environmental Protection and Your Wallet?, which discusses the practical aspects of using used components in modern cars.

BMW Fuel Line System Expansion

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other components from the same group, such as additional lines, flexible hoses, or rigid pipes for medium transport, check the available parts in the BMW Lines, Hoses, and Pipes category.

Summary

The BMW 1 3 Series F20 F21 F30 LCI M140i 340i B58 Fuel Tank Breather Line Pipe Hose is an original fuel tank breather line designed for specific BMW models with the B58 engine. Thanks to its factory fitment, adherence to original routing, and favorable cost-to-functionality ratio, it is a practical service solution for users who want to maintain their fuel system in accordance with the manufacturer's design.