Fuel Fill Flap BMW F30 F80 M3 Cover Cap Liquid Blue Metallic - B40 2239979

Visual condition of the part

The product shows signs of use visible in the photos.

Fuel Fill Flap BMW F30 F80 M3 Cover Cap Liquid Blue Metallic - B40 is an original body component from the Fuel filler flaps and accessories group, designed for 3 Series models, including the sporty M3 version. The paint in the Liquid Blue Metallic – B40 shade allows for an aesthetic match to the factory body color, without the need to experiment with the shade.

Specifications and technical data

• SKU: 2239979-LBL
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2239979
• Substitutable numbers: 2239979, 41002239979
• Color: Liquid Blue Metallic - B40
• Category: Fuel Flaps & Components

Purpose and function of the component

The fuel fill flap in the BMW F30 and F80 M3 series is responsible for protecting the fuel filler neck from dirt, moisture, and mechanical damage. A properly selected cover ensures:

• visual consistency with the body line and fender contours,
• proper closing and cooperation with the opening mechanism,
• protection of the fuel filler area against corrosion and dirt.

The component from this series is structurally matched to the factory mounting, which facilitates installation and reduces the risk of improper fitment with the bodywork.

Liquid Blue Metallic – B40 color

The Liquid Blue Metallic – B40 shade is a characteristic metallic paint used in selected BMW 3 Series configurations. Using a flap in this color allows for:

• maintaining a uniform paint surface in the rear fender area,
• reducing or completely eliminating the need for repainting the component,
• aesthetic integration with the body line in versions with a more dynamic character, including the M3.

For users who care about the visual consistency of the body, this is a practical solution when replacing a damaged or missing flap.

Product characteristics and installation

The BMW fuel fill flap from this series is a body component designed as part of the fuel filler system, working with the hinge and opening mechanism. Thanks to the design consistent with factory specifications:

• the proper gaps between the flap and the body are maintained,
• the component works with the original locking mechanism,
• installation in place of a damaged cover is possible without interfering with the fender structure.

The product comes from disassembly, which in practice means a real possibility of restoring full functionality to the fuel filler area while maintaining a favorable cost-to-quality ratio.

Benefits of using an original BMW flap

Using an original fuel fill flap in a BMW F30 or F80 M3 allows for maintaining factory fitment parameters and mechanism operation. The most important advantages include:

• Factory fit – geometry consistent with the F-series body line, without the need to adjust replacements.
• Color consistency – the Liquid Blue Metallic – B40 paint enables aesthetic replacement of the component in vehicles of this color.
• Reduction of repair costs – using parts from disassembly often allows avoiding the full painting process of a new, raw component.

BMW fuel filler flaps and accessories – expanding the filler area

If you are planning a comprehensive repair or upgrade of the fuel filler area in your BMW and need other components from the same group, such as additional covers, guards, or accessory protective elements, check the available parts in the BMW fuel filler flaps and accessories category.

Technical support and knowledge about the fuel system

When replacing components in the fuel filler area, it is worth understanding how the entire fuel system works with the tank, pump, and injectors. A detailed discussion of operation, diagnostics, and component selection by identification numbers can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which may be helpful when planning broader service work.