Audi R8 42 Vent Pipe Cylinder Head Breather Line Hose 4.2 TSI 079103209AT

The Audi R8 42 Cylinder Head Breather Hose 4.2 TSI is an original crankcase ventilation system component, designed for precise gas evacuation from the cylinder heads in the 4.2 TSI engine. The carefully designed geometry of the hose supports stable engine operation, reduces the risk of leaks, and helps maintain correct system pressure.

Specifications and technical data

• SKU: 079103209AT
• Mark: Audi
• Condition: Used
• OEM Part Number: 079103209AT
• Substitutable numbers: 079103209AT, 079 103 209 AT
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and Function of the Breather Hose

The Audi R8 42 4.2 TSI Cylinder Head Breather Hose operates in a critical engine area, responsible for the controlled evacuation of gases from the cylinder head chambers. A properly functioning hose:

• stabilizes pressure within the cylinder head's under-cover space,
• limits blow-by and oil vapor accumulation in incorrect areas,
• supports the uniform operation of the 4.2 TSI unit across its full load range,
• reduces the risk of oil leaks around the cylinder heads and valve covers.

Thanks to its precise fit for the Audi R8 42 configuration, the hose maintains appropriate rigidity and flexibility in bent areas, facilitating installation and improving connection seal.

Construction and Fit for the 4.2 TSI System

This component belongs to the Hoses, Tubes, and Pipes category, meaning it is designed to operate in environments with elevated temperatures and exposure to oil vapors and exhaust gases. The hose's construction includes:

• a profile matched to the cylinder head geometry in the Audi R8 42,
• an appropriately selected inner diameter for proper gas flow,
• support and guide points that minimize stress during engine operation.

This design allows for the preservation of the original hose routing, which is important for both servicing and maintaining order in the engine bay.

Benefits of Using an Original Audi Hose

Choosing an original breather hose for the Audi R8 42 4.2 TSI offers a range of practical operational benefits:

• factory-perfect fit for the crankcase ventilation system and cylinder heads,
• compatibility with the mounting points and connectors used in the 4.2 TSI engine,
• maintaining predictable engine performance at high RPMs and loads,
• reducing the risk of leaks resulting from the use of aftermarket parts with different geometries.

This part plays a crucial role in the proper functioning of the crankcase and cylinder head ventilation system, contributing to engine smoothness and the cleanliness of the intake system.

Offer Supplementation and Ecological Aspects

If you also need other components from the Hoses, Tubes, and Pipes category dedicated to this brand, check our offer for Audi hoses, tubes, and pipes to complete the entire system according to manufacturer requirements.

Choosing a used breather hose is not only economical but also a conscious ecological decision. If you want to better understand how the reuse of original components impacts the environment and service budgets, read the article Eco-Driving: Discover the Benefits of Used Car Parts.