BMW F31 Fuel Cover Fill In Flap Estoril Blue Metallic - B45

The BMW F31 Fuel Filler Flap Estoril Blue Metallic - B45 is an original fuel filler cover from the BMW range, designed for the F31 3 Series Touring body style. This part, in the distinctive Estoril Blue Metallic - B45 color, helps maintain the visual consistency of the bodywork after repairing or replacing a damaged flap.

Specifications and technical data

• SKU: 7300931-EB
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7300931
• Substitutable numbers: 7300931, 41007300931, EM
• Color: Estoril Blau Metallic - B45
• Category: Fuel Flaps & Components

Characteristics and Purpose of the BMW F31 Fuel Filler Flap

This flap belongs to the category of fuel filler covers and accessories, meaning it is factory-fitted to the fuel filler neck on the BMW 3 Series F31. The design of the part ensures proper closure, compatibility with the opening mechanism, and adequate sealing of the filler area, which is important for both safety and the durability of the paintwork around the cap.

Its original BMW origin translates to a precise fit with the body lines, maintaining factory gaps between body panels, and compatibility with standard hinges and mounting points. This allows the flap to be used as a replacement for a damaged part without the need for bodywork modifications.

Estoril Blue Metallic - B45 Color and Visual Matching

Estoril Blue Metallic - B45 is a distinctive, dynamic shade of blue with a metallic effect, often found on sportier versions. Using a flap in this color allows for:

• maintaining paint consistency in the rear fender and fuel filler area, with no visible shade differences if the rest of the bodywork is in the same paint code,
• limiting the scope of painting in accident repairs – in many cases, a part match is sufficient without requiring a full repaint,
• preserving the original look of the BMW F31, which is important for maintaining the vehicle's value and for future resale.

For body and paint shops, as well as detail-oriented owners, a ready-to-install part in the correct color is a practical solution that reduces repair time and minimizes the risk of shade discrepancies.

Construction, Installation, and Technical Aspects

As a body part from the fuel filler covers and accessories group, the flap is designed to work with the factory opening and closing mechanism on the BMW F31. Its precisely shaped outer and inner surfaces allow for:

• secure mounting to the hinge at the rear of the body,
• proper fit against the bodywork when closed, without excessive play,
• hassle-free fuel filling during daily use.

This part is from the used market (used condition), which is beneficial for those seeking an economical yet original solution. A used OEM part typically retains its factory geometry and mounting method, making it easier to install in place of a damaged flap without additional adaptations.

Practical Application and Benefits of Choosing an Original BMW Flap

Choosing an original fuel filler flap in Estoril Blue Metallic - B45 is particularly recommended in situations where:

• there has been mechanical damage to the flap (e.g., during a collision or vandalism),
• a local body repair is required without repainting the entire side of the vehicle,
• the owner wants to maintain the original look of the BMW F31 with the factory Estoril Blue Metallic color.

An original part from the same BMW product line ensures predictable behavior during installation and a seamless aesthetic match with other body panels. This is a solution that works well in both professional dealerships and independent workshops specializing in the BMW brand.

BMW Fuel Filler Covers – Selection and Additional Information

If you are looking for other parts from the BMW fuel filler covers and accessories category for your car, check out the BMW fuel filler covers and accessories available in our store to select the right option for your specific model and body style.

When replacing the flap, it is also worth checking the condition of the entire refueling system. For practical insights into diagnostics, part number selection, and maintenance, refer to our blog article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair. This will help you plan comprehensive servicing of the filler area and fuel tank in your BMW.