Audi A6 C8 A7 4K Engine Air Pressure Air Hose Line Pipe 3.0 TFSI 4K0145673AC

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A6 C8 A7 4K Engine Air Pressure Air Hose Line Pipe is an original intake system component designed for petrol engines. Thanks to its factory geometry and precise fitment for the specific 4K platform, it ensures stable airflow to the engine and proper cooperation with other intake system components.

Specifications and technical data

• SKU: 4K0145673AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 4K0145673AC
• Substitutable numbers: 4K0145673AC, 4K0 145 673 AC
• Fuel type: Petrol
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The described hose belongs to the group of components responsible for transporting compressed air in the petrol engine of Audi A6 C8 generation and Audi A7 4K series models with the 3.0 TFSI unit. Its task is to provide a tight and stable connection between individual sections of the intake system, ensuring that air pressure is maintained at the correct level without uncontrolled drops or leaks.

A properly selected pressure hose in a petrol engine translates into:

• proper operation of the turbocharging and engine control system,
• stable boost pressure values across the entire rev range,
• reduced risk of ECU errors related to intake leaks.

Construction and fitment for Audi A6 C8 / A7 4K

The hose was designed as an original Audi factory component, which means its shape, connection diameters, and mounting points are adapted to the specific intake system layout in A6 C8 and A7 4K bodies. As a result, installation is performed using existing brackets and clamps, without the need for modifications or fitting universal replacements.

Key advantages of this solution include:

• precise fit with engine bay components,
• maintenance of the original air routing path,
• compatibility with the 3.0 TFSI petrol engine equipment.

Condition, service application, and benefits of installation

The item comes from the Hoses, pipes and lines group and is offered as a used part, which allows for an economical repair of the intake system while maintaining the manufacturer's original specifications. It is particularly useful in situations where the existing hose has suffered mechanical damage, delamination, abrasion, or deformation due to temperature.

Replacing the air pressure hose is recommended when symptoms such as the following appear:

• loss of engine power under load,
• uneven operation of the power unit in the boost range,
• registered ECU errors regarding intake system pressure.

Integration with the 3.0 TFSI petrol system

The 3.0 TFSI engine is an advanced petrol unit where stable intake air pressure has a direct impact on refinement, performance, and fuel consumption. Using a hose that complies with Audi's factory specifications helps maintain the correct operating parameters of the turbocharger, mass air flow sensor, and pressure sensors, which is important both in daily use and during more dynamic driving.

Selecting a component from the same model platform reduces the risk of installation problems and minimizes vehicle downtime at the service center.

Expanding the Audi intake system – related components

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other items from the same group, such as additional air hoses, flexible intake hoses, or rigid pressure pipes, check the available parts in the Audi hoses, pipes and lines category.

To better understand the specifics of Audi power units and the principles of selecting original components by OEM number or VIN, it is worth reading the guide in the article "Audi five-cylinder engine – a legend from Quattro to RS3 and how to maintain it using original Audi parts", which discusses practical aspects of working with used OEM components.