Audi A4 B9 Air Intake Elbow Pipe Hose Tube Line 3.0 TDI CNHA 059129955AK

Audi A4 B9 Air Intake Elbow Pipe Hose Tube Line 3.0 TDI CNHA is an original intake system component from the Lines, hoses and pipes group, designed for 3.0 TDI diesel engines. It ensures stable airflow to the turbocharger, reduces unwanted acoustic vibrations, and supports the proper operation of the diesel power unit.

Specifications and technical data

• SKU: 059129955AK
• Mark: Audi
• Condition: Used
• OEM Part Number: 059129955AK
• Substitutable numbers: 059129955AK, 059 129 955 AK
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Function in the 3.0 TDI intake system

The presented air pipe with a connector and turbo silencer is responsible for the controlled guidance of the airflow in the 3.0 TDI CNHA engine. The design of the component allows for the reduction of pulsation and noise generated by the compressor, which translates into smoother engine operation and stable conditions for boost control.

Thanks to its precise fit to the engine bay geometry in the Audi A4 B9, the component maintains the tightness of the intake system, minimizing the risk of pressure drops, leaks, and turbocharger operation disturbances. This is particularly important in modern diesel engines, where proper airflow has a direct impact on performance and refinement.

Construction and fitment for Audi A4 B9

The air pipe integrated with the connector and silencer has been designed specifically for the engine bay architecture of the Audi A4 B9 generation with the 3.0 TDI unit. Properly shaped pipe sections, mounting points, and the connection port allow for installation in factory locations without the need for modifications.

This solution ensures:

• stable routing of the pipe in the engine bay,
• correct positioning relative to the turbocharger and other intake components,
• preservation of factory airflow characteristics.

As a result, the pipe can be used both as a replacement part during repairs and when restoring the factory configuration of the intake system after previous modifications.

Intended for Diesel engines

The component has been developed for Diesel power units, where boost pressures and requirements regarding tightness and load resistance are particularly high. Using the correct air pipe with a turbo silencer helps maintain:

• stable compressor operating conditions under variable loads,
• appropriate noise levels within the intake range,
• consistency of operating parameters with engine control unit maps.

Selecting the correct component for the specific 3.0 TDI CNHA engine version is crucial for maintaining proper cooperation with the control system and for avoiding diagnostic errors related to airflow.

Condition, service application, and installation

The air pipe with a connector and turbo silencer in this version is intended for service applications in Audi A4 B9 vehicles with the 3.0 TDI engine. It can be used when replacing a damaged pipe, during post-collision repairs, or in situations where it is necessary to restore the proper tightness of the intake system.

Due to the specific shape and the presence of the silencer, it is recommended to perform the installation in accordance with the factory service procedure, checking all mounting points and connections. A properly installed component supports stable turbocharger operation and reduces the risk of unwanted pipe vibrations during operation.

Complementary Audi lines, hoses and pipes

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 intake lines, vacuum hoses, or turbocharger pipes, check the available parts in the Audi lines, hoses and pipes category.

To better understand the specifics of modern diesel units and the impact of component quality on operating costs, it is worth reading a comparative analysis of legendary BMW engines – it discusses performance, durability, and the availability of aftermarket parts in detail: BMW N47 vs M57 / M57N / M57N2 – a ranking of legendary diesels.