Audi A6 C7 Q7 4L Engine Breather Hose Pipe Line Tube 3.0 TDI CRCA 059103221AL

The Audi A6 C7 Q7 4L Engine Breather Hose 3.0 TDI CRCA is a component from the Hoses, Tubes, and Pipes group, designed for the crankcase ventilation system in 3.0 TDI diesel engines. It is responsible for the controlled venting of gases from the engine compartment, which supports stable engine operation and reduces the risk of leaks. This is a practical service solution for Audi A6 C7 and Q7 4L owners with the CRCA engine who want to restore the correct operating parameters of the ventilation system.

Specifications and technical data

• SKU: 059103221AL
• Mark: Audi
• Condition: Used
• OEM Part Number: 059103221AL
• Substitutable numbers: 059103221AL, 059 103 221 AL
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and Function in the 3.0 TDI CRCA Engine System

The Engine Breather Hose 3.0 TDI CRCA operates within the crankcase ventilation system, directing gases from inside the engine for further processing in the intake system. A correctly selected hose in this location:

• stabilizes crankcase pressure,
• limits oil blow-by to the surroundings,
• supports the smooth operation of the 3.0 TDI unit under various loads,
• reduces the risk of leaks and oil contamination of ancillary components.

By properly channeling internal engine gases, the breather hose helps maintain cleanliness in the engine compartment and contributes to stable operating parameters of the turbocharged diesel engine.

Construction and Fitment for Audi A6 C7 and Q7 4L

This component belongs to the Hoses, Tubes, and Pipes group, meaning its construction is adapted to operate in environments with elevated temperatures and contact with oil vapors. The shape and connection diameters are designed for specific routing within the engine compartment of the Audi A6 C7 and Q7 4L, facilitating installation at factory mounting points.

The proper shaping of the hose ensures:

• correct positioning relative to other ancillary components,
• minimization of stress during engine operation,
• reduction of the risk of abrasion and leaks during prolonged use.

Benefits of Using an Original Audi Hose

The breather hose offered as an Audi brand part ensures compatibility with the vehicle's factory specifications. In practice, this means:

• a secure fit for the 3.0 TDI CRCA unit without modifications,
• preservation of the original gas flow geometry,
• consistency with other components of the crankcase ventilation and intake systems.

Choosing an original hose from this group helps avoid problems typical of aftermarket alternatives, such as incorrect length, different connection diameters, or difficulties with installation in factory brackets.

Component Condition and Service Application

The offered breather hose comes from the circulation of used components, making it an attractive solution for budget repairs or restoring system functionality in older Audi A6 C7 and Q7 4L models. This type of component is particularly useful when the existing hose shows signs of wear, cracking, delamination, or leaks at the connections.

Replacing the hose with a functional unit helps to:

• limit oil leaks and contamination in the engine compartment,
• reduce undesirable exhaust and vapor odors,
• maintain proper operating conditions for the intake and crankcase ventilation systems.

Expanding Service within the Audi Hose System

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as vacuum hoses, intake hoses, or crankcase ventilation pipes, check the available parts in the Audi Hoses, Tubes, and Pipes category.

If you want to broaden your knowledge on selecting used components and their impact on vehicle performance characteristics, an article describing the installation of a sports exhaust system in a compact car might be helpful. More information can be found in the material: Used Mini John Cooper Works Pro Sport Exhaust – A Legal Way to Get a Sporty Sound and +7 HP.