Audi A4 B8 A5 8T Q5 8R A8 D3 Fuel Tank Filler Screw Cap Cover Diesel 8K0201550B

The Audi Q5 8R Diesel Fuel Filler Cap is an original part of the refueling system, designed for Audi vehicles with a diesel engine. It ensures a tight seal for the filler neck, supports the proper functioning of the fuel system, and reduces the risk of contaminants entering the tank.

Specifications and technical data

• SKU: 8K0201550B-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0201550B
• Substitutable numbers: 8K0201550B, 8K0 201 550 B
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Intended Use and Function in the Fuel System

The presented cap is a component from the Fuel Tanks and Filler Necks group, specifically designed for Audi Q5 8R models powered by Diesel fuel. Its purpose is to maintain the system's proper seal, stabilize pressure within the tank, and protect against moisture and dirt during daily operation.

A well-chosen fuel filler cap reduces diesel fuel evaporation, helps maintain correct fuel system operating parameters, and lowers the risk of errors related to improper tank ventilation.

Original Origin and Technical Compatibility

This is an original Audi part, which means full compatibility with the factory design of the filler neck, thread, and seals in the Audi Q5 8R. Using a part from the same production line as the original equipment ensures consistency with service documentation and manufacturer-specified parameters.

Thanks to this, the cap works correctly with the existing tank and fuel filler neck system, without the need for modifications or adjustments of aftermarket replacements with uncertain specifications.

Condition, Installation, and Operation

The item is offered as a used OEM component, which in practice means a favorable compromise between cost and maintaining original construction. The cap is intended for direct installation in place of a worn or damaged part, following standard service procedures.

Replacing the fuel filler cap is one of the simpler maintenance tasks within the fuel system. A correctly chosen part helps to reduce common problems such as leaks, fuel odor around the vehicle, or improper tank venting.

Benefits of Using an Original Diesel Cap

• maintaining factory seal and fit for the fuel filler neck in the Audi Q5 8R,
• compatibility with the fuel system adapted for diesel fuel,
• reducing the risk of contaminants entering the tank,
• maintaining proper operation of the tank's ventilation system and pressure,
• rational cost due to the use of a used OEM part.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other parts from the same group, such as the fuel tank, filler neck, or additional mounting elements, check the available parts in the Audi Fuel Tanks and Filler Necks category.

Technical Support and Fuel System Knowledge

To better understand the role of the filler cap in the entire fuel supply system, it is worth familiarizing yourself with material discussing the construction and operation of the fuel system, including selecting components by factory numbers and principles of diagnostics and regeneration – detailed information can be found in the article "Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Regeneration".

If you are interested in how using used OEM parts can reduce vehicle downtime in the workshop and lower repair costs, the entry on the impact of used parts availability on repair time in a workshop will also be helpful.