Audi A6 C7 A7 4G Vent Pipe Diesel Engine Breather Hose 3.0 TDI Diesel 059103209D

Audi A6 C7 A7 4G Vent Pipe Diesel Engine Breather Hose 3.0 TDI Diesel is a component from the Lines, hoses and pipes group, designed for the crankcase ventilation system in diesel engines. It is responsible for the controlled discharge of gases from the crankcase, which promotes stable diesel engine operation and reduces the risk of unwanted leaks or overpressure in the system.

Specifications and technical data

• SKU: 059103209J
• Mark: Audi
• Condition: Used
• OEM Part Number: 059103209J
• Substitutable numbers: 059103209J, 059 103 209 J
• Fuel type: Diesel
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the 3.0 TDI Diesel engine

The breather hose in the 3.0 TDI Diesel engine plays a vital role in the crankcase ventilation system. It enables controlled gas flow, which:

• stabilizes pressure inside the engine,
• limits blow-by and uncontrolled escape of oil vapors,
• supports smooth operation of the power unit under various loads.

Thanks to the proper routing of gases from the breather, the lubrication system maintains appropriate operating conditions, and the diesel engine retains predictable performance parameters.

Advantages of using an original Audi hose

The breather hose used in Audi A6 C7 and A7 4G models has been designed as a component matched to the specific architecture of the engine bay. This means:

• precise fitment with connectors and other system components,
• maintenance of the factory hose routing geometry,
• appropriate material stiffness and flexibility under typical diesel operating conditions.

Choosing an original hose from this group allows for maintaining the structural integrity of the ventilation system, which translates into predictable engine behavior and reduces the risk of leaks resulting from ill-fitting aftermarket replacements.

Characteristics of the used component

The offered engine breather hose comes from disassembly, which allows for an economical repair while maintaining a component compliant with Audi's factory specifications. A used part is a good choice when:

• the existing hose shows signs of wear, cracking, or delamination,
• a quick replacement is necessary without waiting for regeneration,
• maintaining the original geometry and mounting points is essential.

In the case of ventilation systems in diesel engines, using a part from the same design group allows for maintaining stable operating conditions of the power unit and reducing the risk of secondary failures resulting from leaks.

Role in the Lines, hoses and pipes system

The breather hose belongs to the Lines, hoses and pipes group, which are components responsible for transporting working media and gases in the vehicle. In the case of the 3.0 TDI Diesel engine, its proper operation affects:

• maintaining the correct circulation of gases from the crankcase,
• reducing contamination in the intake,
• stability of unit operating parameters during startup and under load.

Replacing a worn hose with a functional component from the same design group is a simple way to restore the correct operation of the ventilation system without interfering with other sub-assemblies.

Support in choosing parts and additional information

If you are considering whether a better solution in your case would be regeneration or installing a used original component, the guide material describing the differences between these approaches may be helpful – check the article Regenerated or used original – which part to choose for repair?.

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 lines, cooling system hoses, or fuel pipes, check the available parts in the Audi lines, hoses and pipes category.