BMW F83 M4 Fuel Filler Fill in Flap Cover Cap Black Sapphire Metallic - 475

Visual condition of the part 

The product shows signs of use visible in the photos. 

BMW F83 M4 Fuel Filler Fill in Flap Cover Cap Black Sapphire Metallic is an original body component from the Fuel filler covers and accessories group, designed for installation in the rear part of the vehicle. The paint in the Black Sapphire Metallic - 475 shade ensures consistency with the factory BMW color palette, which facilitates the aesthetic replacement of a damaged flap without the need for additional visual matching.

Specifications and technical data

• SKU: 8057823-BS
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8057823
• Substitutable numbers: 8057823, 51178057823
• Location on the vehicle: Rear
• Color: Black Sapphire Metallic - 475
• Category: Fuel Flaps & Components

Purpose and fitment for BMW F83 M4

The presented fuel filler flap has been designed specifically for the BMW F83 M4 model, ensuring it maintains the factory body lines and correct mounting geometry. Its placement in the rear of the vehicle allows for seamless integration with the standard fuel filler cover, maintaining the proper gap relative to the fender and the correct operation of the opening mechanism.

The original BMW origin guarantees compliance with factory quality standards, which translates into stable seating of the component, proper fitment with the bodywork, and predictable behavior during daily use.

Black Sapphire Metallic - 475 color and aesthetic values

The finish in Black Sapphire Metallic - 475 allows for a uniform appearance of the bodywork in vehicles painted in this shade. The metallic structure of the paint provides the characteristic depth and gloss typical of BMW sports models, which is particularly important for visible exterior elements such as the fuel filler flap.

Thanks to the factory paintwork, the flap fits well into the side line of the body, reducing the need for additional painting work after installation. This is a practical solution when replacing a component after mechanical damage or interference in the fuel filler area.

Characteristics of the used component

The item comes from the secondary market, which allows for an economical repair of the fuel filler area while maintaining the original BMW construction. A used fuel filler flap is a good choice in situations where the priority is to maintain the factory look and compatibility while reducing costs.

Choosing an original, used fuel filler cover reduces the risk of fitment problems typical of replacements with imprecise dimensions, and also facilitates installation in the factory mounting location.

Installation and use in the rear area of the vehicle

The flap is intended for installation in the rear part of the body, in the area of the factory fuel filler. The design provided by the manufacturer allows for installation in place of the original component, while maintaining the correct operation of the hinge and the opening and closing mechanism.

In practice, this means that after proper installation, the flap should work with the existing fuel filler cover and seal, providing adequate protection for the filler against external factors such as moisture or road dirt.

BMW fuel filler covers and accessories – expansion and modernization

If you are planning a comprehensive repair or modernization of the fuel filler area in your BMW and need other components from the same group, such as additional covers, shields, or dedicated mounting accessories, check out the available parts in the BMW fuel filler covers and accessories category.

Technical support and knowledge about the fuel system

When working in the fuel filler area, it is worth knowing the basic principles of the entire engine fuel system. Detailed information on diagnostics, component selection by catalog numbers, and operating principles can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which helps to better plan service work within the fuel system.