Audi A4 B8 Fuel Insert Filler Housing Surround 8K0809999A

Audi A4 B8 Fuel Insert Filler Housing Surround is an original body component from the Fuel filler flaps and accessories group, designed for precise installation in the Audi A4 B8 generation model. This used, factory-original part ensures proper flap guidance and secure seating of the filler neck, which translates into correct operation of the refueling system and a consistent appearance of the side body panel.

Specifications and technical data

• SKU: 8K0809999A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0809999A
• Substitutable numbers: 8K0809999A, 8K0 809 999 A
• Category: Fuel Flaps & Components

Purpose and technical function

The fuel filler housing in the Audi A4 B8 is responsible for the stable mounting of the flap and the guide elements in the filler area. A correctly selected component:

• maintains the proper geometry of the filler opening relative to the fender panel,
• ensures correct operation of the hinge and flap opening mechanism,
• protects the area around the filler neck from excessive dirt and moisture,
• reduces the risk of stress and cracks in the body panel in the refueling area.

Thanks to the use of an original design, compatibility with factory mounts and the stock fuel filler flap is maintained.

Benefits of using an original housing

Using a component sourced from Audi allows you to maintain the structural integrity of the body. Factory fitment translates into:

• proper alignment with the fender line and filler flap,
• no need for modifications to mounts or custom adapters,
• preservation of the original rigidity of the fuel filler zone,
• easier installation compared to aftermarket replacements with uncertain geometry.

This solution is particularly beneficial for post-accident repairs, replacing corroded parts, or restoring the vehicle to a factory-like condition.

Part condition and installation aspects

The fuel filler housing is a used part, sourced from vehicle dismantling, which allows for the preservation of the original material and structural specifications. Before installation, standard visual verification, surface cleaning, and alignment with existing body mounting points are recommended.

In practice, installation involves:

• removing the damaged or corroded housing,
• checking the condition of the mounts in the fender,
• seating the housing in the factory points and checking the flap operation,
• testing the opening and closing mechanism after installation.

Part selection by numbers and fuel system compatibility

The component should be selected based on catalog data and manufacturer markings, which minimizes the risk of incompatibility with a specific version of the Audi A4 B8 body. In case of doubt, it is useful to compare the shape, mounts, and flap guidance method with the currently installed part.

For users interested in a broader perspective on issues related to refueling and engine supply, the article describing the diagnostics and operation of the fuel system will be helpful – details can be found in the material Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Repair expansion and selection of other elements

If you are planning a comprehensive repair or upgrade of the fuel filler zone in your Audi and need other elements from the same group, such as flaps, seals, or additional mounts, check the available parts in the Audi fuel filler flaps and accessories category.

When deciding whether to stick with used parts or consider the regeneration of other components, a guide comparing both approaches may be helpful – more information can be found in the article Regenerated or used original – which part to choose for repairs?.