Audi A6 C7 Air Intake Hose Pipe Duct Tube Line 2.0 TDI Diesel CNHA 4G0129615J

Visual condition of the part

The product shows signs of use visible in the photos. Audi A6 C7 Air Intake Hose Pipe Duct Tube Line 2.0 TDI Diesel CNHA is an original intake system component from the Lines, hoses and pipes group, designed for diesel engines. It ensures stable airflow to the engine, which promotes smooth operation, correct torque characteristics, and predictable throttle response in daily use.

Specifications and technical data

• SKU: 4G0129615J
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0129615J
• Substitutable numbers: 4G0129615J, 4G0 129 615 J
• Fuel type: Diesel
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The air intake hose in the Audi A6 C7 with the 2.0 TDI CNHA engine is responsible for the controlled flow of air from the filtration system towards the power unit. A correctly selected component of this type:

• stabilizes the airflow sucked in by the diesel engine,
• limits pressure drops in the intake,
• minimizes the risk of leaks and the intake of contaminants,
• supports the correct operation of engine accessories, including the turbocharging system and fuel dosage control. Thanks to maintaining the proper cross-section and geometry of the hose, the 2.0 TDI unit can operate under stable conditions, which translates into predictable performance and repeatable combustion parameters.

Technical characteristics and fitment

As an element from the Lines, hoses and pipes group, this hose has been designed specifically for the engine bay architecture of the diesel-powered Audi A6 C7. Properly selected connector diameters, shape, and mounting points allow for secure seating in factory brackets and guides, without the need for modifications. Such fitment limits material stress, reduces the risk of abrasion against adjacent components, and facilitates maintaining tightness throughout the entire intake path. In practice, this translates into stable engine operation across the full load range, both in city and highway driving.

Benefits of using an original Audi hose

Using an original air intake hose in an Audi A6 C7 brings a number of practical benefits:

• Factory fitment – the hose is structurally compatible with the intake system of the specific engine version, which facilitates installation and reduces service time.
• Stable flow parameters – the maintained internal geometry promotes even cylinder filling, which supports the refinement of the diesel unit.
• Compatibility with diesel accessories – the hose works with the diesel fuel supply system, taking into account the operating characteristics of the turbocharging and control systems.
• Possibility of economical repair – choosing a used OEM component allows for reducing service costs while maintaining a design consistent with the manufacturer's project.

Component condition and service application

The offered hose is a used original Audi component, which makes it an attractive solution for maintenance repairs and restoring the efficiency of the intake system after mechanical damage. This type of part will work well both in the case of replacing a worn element and for post-collision repairs, when it is necessary to restore the factory routing of hoses in the engine bay. Choosing an original air intake hose is particularly important in diesel engines, where the tightness and stability of airflow have a direct impact on the operation of the injection system, exhaust emissions, and the overall durability of the power unit.

Expanding the intake system in an 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 additional intake lines, flexible hoses, or rigid air system pipes, check the available parts in the Audi lines, hoses and pipes category. To better plan your service budget and consciously combine new and used OEM components, it is worth reading the guide: Rising repair costs and the boom in used parts – how to save on car service?.