Filler Cap BMW E60 X3 E83 E90 Mini R50 R56 Fuel Tank Filler Cap Cover 7222391

Filler Cap BMW E60 X3 E83 E90 Mini R50 R56 Fuel Tank Filler Cap Cover is an original component from the Fuel filler flaps and caps group, designed for the airtight sealing of the fuel filler neck in selected BMW and Mini models. It ensures secure isolation of fuel from the external environment, reduces evaporation, and protects the fuel system against contamination.

Specifications and technical data

• SKU: 7222391-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7222391
• Substitutable numbers: 16117222391, 7222391, 16116765046, 6765046, 16116756772, 6756772, 16117224480, 7224480, 16116754491, 6754491, 16116759042, 6759042, 16116754634, 6754634, 16116765045, 6765045, 16116759252, 6759252, 16111184668, 1184668, 16110149425, 0149425
• Category: Fuel Tank Caps

Purpose and technical function

The presented cap is a factory-fitted solution used in BMW E90 series vehicles as well as Mini R50 and R56 models, which guarantees a proper fit to the fuel filler neck and correct operation with the factory tank ventilation system. The design ensures stable mounting and repeatable closure, which is essential for both operational safety and the correct functioning of the fuel system.

Thanks to the use of original sealing geometry, the cap maintains the appropriate pressure in the tank, minimizing the risk of moisture, dirt, or dust entering the fuel. This translates into more predictable engine performance and reduced load on components such as the fuel pump or injectors.

Compatibility and OEM identification

The element was designed as a BMW OEM part, which means compliance with factory dimensional and material standards. The presence of a dedicated OEM part number and associated interchangeable numbers facilitates precise identification of the component via manufacturer catalogs, VIN, or service documentation, thereby reducing the risk of selecting an incompatible replacement.

For users and workshops, this means the possibility of hassle-free replacement of a worn or damaged cap with a part of the same specification, without the need for modifying the filler neck or additional alterations. This is particularly important in vehicles equipped with fuel filler opening sensors or fuel system leak monitoring systems.

Benefits of using an original fuel filler cap

Using an original fuel filler cap in the BMW E90 and Mini R50/R56 brings a number of practical operational benefits:

• maintaining factory fuel system tightness and reducing fuel evaporation,
• protecting the inside of the tank from external contaminants,
• maintaining correct cooperation with the diagnostic and ventilation system,
• secure, repeatable closure of the filler without play or uncontrolled unscrewing.

For the user, this means stable, predictable vehicle operation and a lower risk of problems related to fuel system performance. For service centers and workshops, installing such a component allows for repair compliance with manufacturer guidelines, which is important when servicing fleet vehicles or vehicles covered by extended service programs.

Condition, origin, and practical application

The cap comes from the original BMW production line, which ensures consistency with other fuel system components in a given model. As a used part, it is a good choice for users looking for a cost-effective solution while maintaining factory specifications. It works well both for typical maintenance replacement and for repairs following mechanical damage in the fuel filler area.

In practice, installation is limited to basic service tasks and does not require specialized tools, provided that the filler neck and mounting elements are in good technical condition. Thanks to this, the cap can be replaced both in a professional workshop and during standard vehicle maintenance.

Fuel system expansion and technical knowledge

To better understand the role of the fuel filler cap in the entire fuel supply system, it is worth familiarizing yourself with issues related to injectors, pumps, and the fuel tank – these are discussed in detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This allows for conscious planning of service maintenance and component selection by OEM numbers.

Other items from the BMW Fuel filler flaps and caps group

If you are planning a comprehensive repair or modernization of the fuel filler area in your BMW and need other elements from the same group, such as additional caps, flaps, or filler covers, check the available parts in the BMW Fuel filler flaps and caps category.