BMW Z3 Z4 X5 E39 E46 E53 E65 E66 E85 M54 Fuel Tank Breather Line

BMW Z3 Z4 X5 E39 E46 E53 E65 E66 E85 M54 Fuel Tank Breather Line is an original fuel system component responsible for the proper venting of fuel vapors from the tank and pressure stabilization. Thanks to its factory geometry and precise fitment for specific BMW models, it ensures hassle-free installation and proper integration with other fuel system components. It is a practical solution for users looking to restore efficient operation of the venting system following a failure or wear of the old part.

Specifications and technical data

• SKU: 7557924
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557924
• Substitutable numbers: 13907557924, 7557924, 13907503987, 7503987
• Category: Hoses, Lines & Pipes

Function and application of the fuel tank breather line

The fuel tank breather line in BMW E46, E53, and E65 series models is responsible for the controlled discharge of fuel vapors and pressure equalization within the tank. A properly functioning line:

• limits the risk of vacuum or overpressure buildup in the tank,
• supports stable operation of the fuel pump and the entire fuel supply system,
• reduces the likelihood of leaks and unwanted fuel odors,
• ensures correct cooperation with the evaporative emission control system.

By maintaining the factory routing, the line is perfectly matched to the vehicle's body structure and adjacent components, which facilitates servicing and reduces the risk of incorrect installation.

Original origin and compatibility

The product comes from the BMW group, which means it is designed in accordance with the vehicle manufacturer's requirements. The original fuel tank breather line:

• maintains the correct diameter and connection shape,
• is adapted to factory brackets and mounts in the body,
• ensures compatibility with the fuel system used in selected versions of the BMW E46, E53, and E65.

As a result, it provides a safe alternative to non-factory replacements, minimizing the risk of leaks and fuel system diagnostic issues.

Characteristics of the used component

The part is offered as used, which in practice means it has been removed from a vehicle and verified for further serviceability. For many users, this is a sensible choice that allows you to:

• reduce repair costs while maintaining original specifications,
• maintain the consistency of the fuel system with factory components,
• replace a damaged or brittle line without the need for modifications.

Before installation, a standard visual inspection is recommended, as well as installation in accordance with BMW service procedures to ensure tightness and proper routing of the line.

Why choose this breather line

Replacing the fuel tank breather line is particularly important when symptoms such as refueling difficulties, fuel odor around the vehicle, or errors related to the evaporative emission system occur. Using an original line:

• helps restore proper tank venting,
• limits the risk of leaks and uncontrolled vapor escape,
• supports stable engine operation under various load conditions.

If you are planning comprehensive maintenance of the fuel system in your BMW, it is worth considering other elements from the lines and hoses group to avoid the problem returning in the near future.

To select other components of this type for your car, check the available products in the Lines, hoses, and pipes category. If you want to better plan your service and learn about the most frequently replaced parts, check out our guide TOP 10 most frequently replaced parts in your car, where you will find practical tips on operation and failure prevention.