BMW 1 3 Series F20 F21 F30 F31 LCI M140i 340i Vent Breather Hose Pipe 7637521

BMW 1 3 Series F20 F21 F30 F31 LCI M140i 340i Vent Breather Hose Pipe is an original component from the Lines, Hoses and Pipes group, designed for use in modern BMW 1 and 3 Series facelift engines. A properly selected vent breather hose is crucial for the stable operation of the engine system, which is why choosing an original BMW component is a safe and technically sound solution.

Specifications and technical data

• SKU: 7637521
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7637521
• Substitutable numbers: 11157637521, 7637521, EM
• Category: Hoses, Lines & Pipes

Purpose and function of the vent breather hose

The presented vent breather hose has been designed for BMW F-series models with M140i and 340i engines in facelift (LCI) versions. Its task is the controlled discharge of gases from the appropriate area of the engine system, which supports the proper operation of the power unit, stable operating pressures, and correct interaction with other auxiliary components.

A properly selected vent breather hose:

• reduces the risk of leaks in the engine system,
• supports the maintenance of correct engine operating parameters,
• ensures compatibility with the factory hose layout in BMW F20, F21, F30, and F31 LCI models.

Construction and fitment for BMW F20/F21/F30/F31 LCI

The original BMW vent breather hose is a component designed for specific body and engine variants, ensuring it maintains the correct shape, diameter, and mounting points. This translates into secure routing of the hose in the engine bay, no interference with other components, and easier installation.

The main structural advantages include:

• factory fitment for the hose layout in M140i and 340i models,
• preservation of the original hose routing geometry,
• compatibility with standard connectors and brackets in the engine bay.

Thanks to this, the hose can be used both as a replacement part during standard repairs and when restoring a vehicle to its factory configuration after modifications.

Characteristics of the used component

The offered vent breather hose is a used component, sourced from the dismantling of an original BMW vehicle. This type of component allows for economical repair while maintaining the manufacturer's original specifications. In practice, this means the ability to replace a worn or damaged hose with a factory equivalent, without the need to resort to aftermarket parts with uncertain parameters.

Choosing an original, used vent breather hose is particularly beneficial in the case of:

• engine system repairs where maintaining the factory configuration is important,
• reducing service costs while maintaining OEM quality,
• projects where compliance with BMW technical documentation is essential.

Benefits of using an original BMW hose

Using a BMW vent breather hose in F20, F21, F30, and F31 LCI models brings a number of practical service and operational benefits. The original component ensures:

• secure fitment to the engine system without the need for modifications,
• consistency with other elements from the Lines, Hoses and Pipes group,
• easier diagnostics of potential leaks due to the preservation of the factory hose routing.

For workshops and individual users, this means shorter installation time, lower risk of post-repair issues, and the ability to keep the vehicle in a configuration consistent with the manufacturer's design.

System expansion – other BMW lines, hoses, and pipes

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

Technical support and engine component selection

When working with the engine system – regardless of the brand – it is crucial to correctly select accessories, lines, and venting elements. For users interested in a broader context of servicing power units and selecting appropriate components, an article dedicated to the operation and maintenance of engines in other popular models may be helpful, available here: Reliability under the star – how to take care of engine accessories in popular Mercedes-Benz C and E-Class models?.

Summary

BMW 1 3 Series F20 F21 F30 F31 LCI M140i 340i Vent Breather Hose Pipe is an original component from the Lines, Hoses and Pipes group, designed for use in modern BMW F-series engines. It enables a technically correct replacement of a worn hose, preservation of the factory engine system configuration, and maintenance of high engine performance, which is important both in daily operation and in professional service.