Audi A4 B8 A5 8T Fuel Tank Filler Screw Fuel Cap Cover Petrol 8K0201550A

Audi A4 B8 A5 8T Fuel Tank Filler Screw Fuel Cap Cover Petrol is an original refueling system component designed for Audi vehicles with petrol engines. It ensures a tight seal of the filler neck, stabilizes the fuel system operation, and helps maintain the vehicle's proper performance parameters.

Specifications and technical data

• SKU: 8K0201550A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0201550A
• Substitutable numbers: 8K0201550A, 8K0 201 550 A
• Fuel type: Petrol
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The fuel cap in Audi A4 B8 and A5 8T models is responsible for secure and airtight closure of the filler neck, which limits petrol evaporation and prevents contaminants from entering the tank. A correctly selected component of this type supports stable operation of the fuel supply system, facilitates the maintenance of proper fuel vapor pressure, and reduces the risk of fuel system diagnostic errors.

In petrol-powered vehicles, the material's resistance to fuel and vapors, as well as proper seal fitting, is particularly important. Using a dedicated cap for the specific Audi A4 B8 / A5 8T generation allows for maintaining factory operating parameters and compliance with emission control systems.

Construction and fitment for Audi A4 B8 / A5 8T

The offered cap belongs to the Fuel tanks and filler pipes category, making it structurally adapted to work with the factory filler neck in these models. The shape, mounting method, and seal geometry are designed so that the cap locks securely into the socket while allowing for convenient unscrewing during refueling.

Its original Audi origin means maintaining the vehicle manufacturer's quality standards, which translates into precise fitment with body and fuel system components. In practice, this facilitates installation, minimizes the risk of leaks, and eliminates problems typical of replacements with inaccurate dimensions.

Benefits of using an original fuel cap

Using a dedicated fuel cap in the Audi A4 B8 / A5 8T brings a number of practical operational benefits, including:

• maintaining the tightness of the filler neck and limiting petrol evaporation,
• protecting the inside of the tank from dust, water, and other contaminants,
• maintaining proper cooperation with the fuel system venting and diagnostic systems,
• stable fitment to the factory body socket, without play or tension.

For the user, this means more predictable vehicle behavior, a lower risk of fuel system-related faults, and comfortable, repeatable operation of the opening and closing mechanism during daily refueling.

Professional selection and operation in the fuel system

When choosing a fuel cap for an Audi, it is worth following the manufacturer's markings and compatibility with the specific body generation to avoid installation and sealing problems. A properly matched component helps maintain the efficiency of the entire fuel system, including the tank, lines, and venting elements.

If you want to deepen your knowledge about the operation and maintenance of the fuel supply system, diagnostics, and regeneration of components such as injectors, pumps, or the tank, it is worth checking out our guide: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips there that will facilitate conscious operation and servicing of the vehicle.

Expanding work within the Audi refueling system

If you are planning a comprehensive repair or upgrade of the refueling area in your Audi and need other elements from the same group, such as tank components, filler pipe sections, or additional mounting elements, check the available parts in the Audi fuel tanks and filler pipes category.

To maximize the potential of used components and extend their durability in daily operation, you can also use the advice contained in the article How to extend the life of used car parts?, where practical methods for maintenance and condition checks of dismantled elements are described.