Audi A4 B8 A5 8F Q5 Mk1 Fuel Tank Breather Valve Pipe Hose 8K0201994AE

Audi A4 B8 A5 8F Q5 Mk1 Fuel Vent Hose is an original fuel system component from the hoses, pipes, and tubes group, designed for use in selected Audi models. It ensures proper fuel system venting, which translates to stable engine operation and safe fuel vapor discharge.

Specifications and technical data

• SKU: 8K0201994AE
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0201994AE
• Substitutable numbers: 8K0201994AE, 8K0 201 994 AE
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

The fuel vent hose in Audi A4 B8, A5 8F, and first-generation Q5 models is responsible for the controlled discharge of fuel vapors from the system. A properly functioning hose:

• stabilizes pressure in the fuel system during engine operation and when stationary,
• limits the risk of vacuum formation in the tank,
• supports efficient engine fuel supply under various load conditions,
• helps maintain compliance with fuel vapor emission requirements.

Thanks to its precise fit for the Audi fuel system, the hose maintains proper sealing and flow geometry, which is crucial for repeatable engine performance parameters.

Construction and Compatibility with Audi Models

The offered component comes from the hoses, pipes, and tubes group, meaning it has been designed as an integral part of the Audi fuel system. The hose's construction includes:

• factory-designed shapes and connector diameters, enabling correct routing in the engine bay and undercarriage,
• the use of materials resistant to contact with fuel and its vapors,
• compatibility with factory brackets and mountings in the body.

Such a fit minimizes the risk of stress, abrasion, and leaks, and also facilitates installation without the need for modifications to other system components.

Benefits of Using an Original Vent Hose

Using an original fuel vent hose in an Audi A4 B8, A5 8F, or Q5 Mk1 allows for the preservation of parameters intended by the vehicle manufacturer. Key benefits include:

• consistency with the original fuel system design – no modifications required,
• maintaining predictable vehicle behavior regarding fuel supply,
• reduced risk of fuel leaks and odors around the vehicle,
• easier fuel system diagnostics due to the preservation of the original hose routing.

This solution is particularly beneficial for users who care about the technical integrity of their car, including owners of vehicles considered future youngtimers.

Component Condition and Application in Service Practice

The hose is a used original part obtained from disassembly. Such components are often chosen by professional workshops and discerning users when:

• a quick replacement of a damaged hose is necessary without waiting for rare aftermarket parts,
• preserving the original fuel line routing is important,
• optimizing repair costs while maintaining factory specifications is a priority.

Before installation, a standard check of seals and connector condition is recommended, in accordance with Audi service procedures.

Other Audi Hoses, Pipes, and Tubes and Knowledge about Used Parts

If you are looking for other Audi hoses, pipes, and tubes for your car, check out our dedicated category: Audi hoses, pipes, and tubes. There you will find a wide selection of fuel system, cooling system, and other auxiliary system components.

You can read more about how to consciously use used components in cars from the years 1998–2012 in the article: Second Life for Youngtimers – How Used Car Parts Revitalize Cars from 1998–2012. This is a practical source of knowledge for Audi owners who want to combine reasonable costs with care for the vehicle's technical condition.