Audi A6 C7 A8 D4 Engine Breather Pipe Hose Line 3.0 TDI 059103221AR

Audi A6 C7 A8 D4 Engine Breather Pipe Hose Line is an original component from the Lines, hoses and pipes group, designed for the 3.0 TDI engine breather system in premium Audi models. Engineered by the vehicle manufacturer, it ensures proper routing of vapors and gases from the engine compartment, which promotes stable engine operation and reduces the risk of leaks.

Specifications and technical data

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

Purpose and function of the breather hose

The presented breather hose operates within the 3.0 TDI engine crankcase ventilation system, responsible for the controlled discharge of gases from the crankcase. A correctly selected component of this type:

• stabilizes pressure inside the engine,
• reduces blow-by and unwanted oil leaks,
• supports smooth operation of the diesel unit,
• reduces the risk of contamination of the intake system components.

Thanks to its factory fitment for the 3.0 TDI system in the Audi A6 C7 and Audi A8 D4, the hose maintains the correct routing geometry, which facilitates installation and helps avoid material stress during operation.

Construction and fitment for Audi A6 C7 / A8 D4

The original design of the breather hose is engineered for specific engines and bodies, which is why this component fits precisely into the engine bay space. Properly selected connector diameters and the shape of the hose promote a tight connection with other components of the breather system, without the need for modifications or the use of additional adapters.

Such fitment translates into:

• secure seating on connections and ports,
• reduction of vibrations and hose movement under load,
• maintenance of proper gas flow across the entire engine RPM range.

Benefits of using an original hose

Using an original breather hose in a 3.0 TDI engine provides measurable operational benefits. A component designed by the vehicle manufacturer is adapted to the temperatures, pressures, and vibrations occurring in Audi diesel units, which promotes longer and more predictable system operation.

Key advantages include, among others:

• stable operation of the breather system due to the maintenance of factory flow parameters,
• reduced risk of leaks compared to generic aftermarket replacements,
• better compatibility with other engine accessory components.

In the case of 3.0 TDI units, where the breather system has a significant impact on engine refinement and intake cleanliness, choosing the right hose is an important element of service maintenance.

Characteristics of the used component

The offered breather hose is a used part, sourced from the dismantling of an Audi vehicle. Such a component, provided it maintains the appropriate condition of the material and connectors, can still ensure the correct operation of the breather system, representing a reasonable cost-effective choice compared to new parts. In practice, this allows for maintaining the original vehicle specification while limiting service expenses.

If you want to better understand the impact of using original used components on vehicle resale value, it is worth reading the article: Original used parts and car resale price – how not to lose money?.

Expansion of the hose system in Audi

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as vacuum lines, cooling system hoses, or fluid supply pipes, check out the available parts in the Audi lines, hoses and pipes category.