Audi S4 B6 Fuel Filler Cap Screw Lock Petrol Locking Mechanism Petrol 1J0201553C

Audi S4 B6 Fuel Filler Cap Screw Lock Petrol Locking Mechanism is an original component from the Fuel filler flaps and caps group, designed for petrol supply systems. It ensures a tight seal of the tank, stabilizes the operating conditions of the fuel system, and helps maintain the correct engine performance parameters.

Specifications and technical data

• SKU: 1J0201553C
• Mark: Audi
• Condition: Used
• OEM Part Number: 1J0201553C
• Substitutable numbers: 1J0201553C, 1J0 201 553 C
• Fuel type: Petrol
• Part type: Fuel Tank Cap
• Category: Fuel Tank Caps

Purpose and technical function

The fuel filler cap in the Audi S4 B6 is responsible for the controlled, secure closing of the fuel tank neck in a petrol-powered vehicle. A properly selected component limits fuel evaporation, minimizes the risk of contaminants entering the tank, and stabilizes pressure in the system, which is significant for the operation of the fuel pump and injectors.

In the case of modern petrol engines, a leaking or damaged cap can cause diagnostic errors, rough engine operation, or increased fuel consumption. Using the correct cap dedicated to Audi allows for restoring the proper operating conditions of the supply system without the need for interference with other components.

Product characteristics and advantages of use

The presented cap comes from the Audi parts line, which means maintaining factory geometry, the appropriate seal profile, and fitment to the thread and filler socket. Thanks to this, installation is predictable, without the need for modifications or the use of additional adapters.

Key benefits of using this component in the Audi S4 B6 include:

• maintaining the tightness of the fuel filler neck in a petrol system,
• limiting the ingress of moisture and contaminants into the tank,
• stabilization of fuel system operating conditions,
• compliance with the vehicle manufacturer's factory requirements.

As a part from the Fuel filler flaps and caps group, the cap is an essential maintenance element – its correct selection is particularly important in higher-power cars, such as the Audi S4, where the supply system operates under higher load.

Condition, origin, and service application

The offered cap is a used item, which in practice means the possibility of an economical repair of the fuel filler system while maintaining the original manufacturer's specification. This type of solution is often chosen by professional workshops and conscious users who prefer dismantled parts over replacements with uncertain parameters.

Replacing the fuel filler cap is recommended, among other situations, when problems with closing occur, noticeable looseness, mechanical damage to the housing or seal, as well as when diagnostic errors related to the fuel system appear. A properly selected component helps restore the tightness and stability of the entire system.

Integration with the fuel system and diagnostics

In modern petrol cars, the fuel filler cap is part of a wider system including the tank, lines, pump, and venting elements. When diagnosing problems with fuel odor, errors related to the supply system, or incorrect pressure in the tank, it is worth starting by verifying the condition of the cap, as it is an easily accessible and relatively simple element to replace.

To better understand the relationships between the cap, tank, pump, and injectors, and to correctly interpret fault symptoms, it is worth reading the guide material: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. The article discusses the principles of system operation, part selection by numbers, and typical service procedures.

Expanding repairs within the Audi fuel filler area

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

In the case of broader work related to the bodywork or post-accident repairs where the fuel filler area has also been damaged, the guide on selecting body parts from dismantling may be helpful: Bodywork and exterior – post-accident repairs using dismantled parts. It allows for better planning of the scope of work and selecting the appropriate OEM components.