Audi A6 C8 Activated Carbon Filter Breather Pipe Hose Line 4K0201997R

Active carbon filter vent hose for Audi A6 C8 is an original fuel system component, belonging to the Hoses, pipes and tubes group. Designed by the vehicle manufacturer, it ensures proper fuel vapor venting with the use of an active carbon filter, supporting stable engine operation and reducing harmful emissions.

Specifications and technical data

• SKU: 4K0201997R
• Mark: Audi
• Condition: Used
• OEM Part Number: 4K0201997R
• Substitutable numbers: 4K0201997R, 4K0 201 997 R
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and Technical Function

This crankcase ventilation hose with a carbon filter is part of the fuel tank venting system in the Audi A6 C8 generation. Its function is to control the venting of fuel vapors and direct them to the purification system, preventing them from being released directly into the atmosphere. This helps maintain stable pressure in the fuel system and ensures the engine operates under predictable conditions.

The original design of the hose ensures:

• precise fit to factory mounting points and connectors,
• appropriate diameter and flow geometry,
• compatibility with the factory active carbon filter in the Audi A6 C8.

Construction and Quality of Workmanship

This hose belongs to the group of Hoses, pipes and tubes components, meaning it is designed for resistance to fuel, vapors, and typical thermal loads in the engine bay. The plastics and connectors used are adapted for operation in a automotive environment, where temperature changes, vibrations, and contact with operational fluids occur.

Its original origin from the Audi brand ensures consistency with the factory fuel system architecture, minimizing the risk of leaks, improper hose routing, or interference with other components.

Benefits of Using an Original Hose

Using an original active carbon filter vent hose in the Audi A6 C8 allows you to maintain fuel system operating parameters in line with the manufacturer's specifications. This solution is particularly beneficial when you want to:

• ensure proper fuel vapor venting and compatibility with the exhaust gas purification system,
• reduce the risk of diagnostic errors related to the EVAP system,
• maintain the engine's factory performance characteristics and idle stability.

A component in used condition can be an attractive alternative to new parts, especially for maintenance repairs where the combination of original design and reasonable cost is crucial.

Selection and Compatibility

This hose has been specifically developed for the Audi A6 C8, ensuring a plug-and-play installation when correctly selected for the engine version and model year. In practice, this means no modifications, diameter adjustments, or changes to the hose routing in the engine bay are necessary.

To ensure proper fitment, pay attention to:

• compatibility with the A6 C8 body generation,
• the hose routing within the existing fuel system,
• consistency with the installed active carbon filter.

Condition and Service Application

The offered component is in used condition, meaning it comes from a dismantled vehicle and has been previously used. This type of part is particularly suitable for repairs where maintaining the original system geometry and reducing costs compared to purchasing a new component are priorities.

The active carbon filter vent hose can be used for routine replacement of worn-out parts, as well as for repairs after an accident or intervention in the fuel system, when restoring the original hose routing is necessary.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other components from the same group, such as fuel lines, vent hoses, or return pipes, check the available parts in the Audi Hoses, pipes and tubes category.

If you are interested in the broader context of using original used parts in premium cars and want to better understand how to optimize service costs without compromising quality, it is worth reading the article Luxury within reach – how to service a Porsche legend with reliable used parts.