Audi A4 B9 Turbo Charger Coolant Pipe Hose Line Tube 1.4 TFSI 04E122157CA

Audi A4 B9 Turbo Charger Coolant Pipe Hose Line Tube 1.4 TFSI is an original component from the Cooling system pipes and hoses group, designed for operation in the cooling circuit of a turbocharged petrol engine. It ensures stable coolant flow between the radiator and the turbocharger, which translates into safe thermal conditions for the power unit. This is a practical solution for users looking for a factory fit and proven construction in their Audi.

Specifications and technical data

• SKU: 04E122157AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 04E122157AC
• Substitutable numbers: 04E122157AC, 04E 122 157 AC
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented pipe is a cooling system component responsible for transporting coolant in the area interacting with the 1.4 TFSI engine turbocharger. A properly selected hose in this location is crucial for:

• maintaining a stable operating temperature of the turbocharger,
• reducing the risk of engine overheating,
• ensuring proper pressure in the cooling circuit,
• maintaining system tightness under variable thermal loads.

Thanks to its factory profile, the pipe adapts to the geometry of the Audi A4 B9 engine bay, which facilitates installation and minimizes stress during operation.

Construction and performance characteristics

The pipe belongs to the group of flexible components that must operate under conditions of elevated temperature and contact with coolant. The construction has been designed to:

• maintain adequate flexibility while being resistant to deformation,
• reduce vibrations transmitted from the power unit to the cooling system,
• maintain the tightness of connections with the radiator and turbocharger ports.

The properly contoured shape of the pipe promotes correct coolant flow, which supports stable cooling system operation in both city and highway conditions.

Application in Audi A4 B9 with 1.4 TFSI engine

The element was developed for use with the 1.4 TFSI unit in the Audi A4 B9 model, where the cooling system must handle both the engine block and the turbocharger. Using a factory-origin pipe allows for:

• maintaining the original geometry of pipe routing in the engine bay,
• minimizing the risk of collision with other components,
• maintaining flow parameters in accordance with the manufacturer's specifications.

For users who value consistency with the original Audi design, this is a solution that facilitates servicing and subsequent cooling system diagnostics.

Characteristics of the used product

The part comes from the secondary market, which means it was previously used in a vehicle. Such components are often chosen by users looking for a compromise between repair costs and maintaining the original manufacturer's specifications. In the case of cooling system pipes, it is important to verify the condition of the working surfaces, material flexibility, and connection sockets before installation.

Choosing an original pipe from the secondary market can be beneficial for those who want to maintain factory fitment of cooling system components without having to resort to replacements with uncertain geometry.

Technical support, selection, and additional information

When selecting a pipe for the turbocharger cooling system, it is worth paying attention to compatibility with the specific engine version and equipment configuration. Manufacturer markings, part numbers, and information about the application in a given vehicle model can be helpful. For users planning broader cooling system maintenance, knowledge about typical overheating symptoms and diagnostic methods will also be useful.

To better understand the role of pipes in the cooling circuit and the impact of the entire system's efficiency on the durability of the power unit, it is worth reading our guide: Engine cooling system – overheating, repair, and used radiators.

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 cooling pipes, tubes, or hoses, check the available parts in the Audi cooling system pipes and hoses category.