Audi S4 B7 Fuel Filler Neck Cap Tank Cover Diesel Black 3D0201553E

Audi S4 B7 Fuel Filler Neck Cap Tank Cover Diesel Black is an original refueling system component designed to secure the filler neck and reduce fuel evaporation. Its black, understated color scheme and factory fitment for the S4 B7 model ensure a consistent exterior look and proper integration with the fuel filler flap.

Specifications and technical data

• SKU: 3D0201553E
• Mark: Audi
• Condition: Used
• OEM Part Number: 3D0201553E
• Substitutable numbers: 3D0201553E, 3D0 201 553 E
• Fuel type: Diesel
• Color: Black
• Category: Fuel Tank Caps

Purpose and technical function

The presented cap is part of the Fuel filler flaps and caps group, specifically designed for diesel fuel systems. Its task is to maintain the tightness of the filler neck, which prevents contaminants from entering the tank and minimizes fuel loss due to evaporation. The design, tailored to Audi standards, allows for secure tightening and stable seating in the filler socket.

Construction, color, and visual fitment

The black color of the cap body blends well with most factory filler flaps, ensuring a consistent, orderly appearance when the refueling area is opened. The grip geometry makes it easy to hold and unscrew, even when wearing work gloves or in adverse weather conditions. This solution improves handling ergonomics during daily refueling.

Performance parameters and fuel system safety

The cap is adapted for use with Diesel fuel, which is important for the material's resistance to diesel oil and additives. A properly selected component of this type helps maintain stable conditions in the tank, which promotes trouble-free fuel system operation and reduces the risk of moisture or fine contaminants entering the fuel.

As an original part from disassembly, the cap retains its factory seal and thread geometry, which translates into a proper fit with the filler neck in the Audi S4 B7. This is a particularly beneficial solution when replacing a damaged or worn component, especially when maintaining compliance with the vehicle's factory specifications is a priority.

Condition, installation, and service application

The item is offered in a used condition, making it a cost-effective alternative for maintenance repairs. The cap is suitable for use as a replacement for a factory component in the event of mechanical damage, seal wear, or closing issues. Installation involves seating it in the filler neck and does not require specialized tools, allowing it to be performed both in a professional workshop and in garage conditions.

Technical support and selection of fuel system components

When working on the fuel system, it is worth paying attention to the condition of the entire refueling area – from the flap and cap to the neck and tank. For users who want to deepen their knowledge on diagnostics and maintenance, the article describing the operation and servicing of the fuel system, injectors, pumps, and fuel tank will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

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