Audi A4 S4 A5 S5 F5 Radiator Coolant Hose Tube Pipe Line 8W0122449AS

Audi A4 / S4 / A5 / S5 F5 Coolant Hose is an original part from the Cooling System Hoses and Pipes group, designed for use in the factory cooling system of Audi vehicles. As an OEM part, it ensures proper coolant flow, stable engine operation, and compatibility with factory mounting geometry, facilitating installation and subsequent use.

Specifications and technical data

• SKU: 8W0122449AS-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0122449AS
• Substitutable numbers: 8W0122449AS, 8W0 122 449 AS
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This coolant hose is a component of the factory cooling system in Audi A4, S4, A5, and S5 models of the F5 generation. It is responsible for the controlled flow of coolant between components, which directly impacts the maintenance of the engine's stable operating temperature. A correctly selected hose minimizes the risk of leaks, pressure drops, and localized overheating, which can lead to engine damage.

Construction and OEM Fitment

The offered part belongs to the Cooling System Hoses and Pipes group, meaning its shape, connection diameters, and mounting points are adapted to the original Audi design. Thanks to this, the hose maintains:

• appropriate rigidity and flexibility at bends,
• correct routing relative to other engine bay components,
• compatibility with original clamps and connectors.

Such a fit reduces material stress during engine operation and temperature fluctuations, contributing to longer, stable performance.

Condition, Verification, and Service Application

The item is offered in used condition, making it an attractive solution for cooling system servicing, especially when you aim to retain original OEM parts at a reasonable repair cost. This type of hose is suitable for both replacing a damaged section of the cooling system and for comprehensive engine service, e.g., after a thermostat, water pump, or radiator failure.

Due to the specific nature of the cooling system's operation, installation is recommended in a workshop environment or by an experienced individual, ensuring proper system bleeding and leak checks after starting the engine.

Selection by OEM Number and Compatibility

The hose is designed as an original Audi part, which facilitates unambiguous identification by OEM number and interchangeable numbers visible in the technical specifications. In practice, this means that with correct selection according to manufacturer documentation or VIN, you can achieve full compatibility with the vehicle's factory configuration, without the need for modifications or fitting aftermarket alternatives.

If you wish to deepen your knowledge on safely selecting parts by catalog numbers, the guide: How to Select the Right Car Part by VIN and OEM Number will be helpful, offering practical tips and a checklist for discussions with the seller.

Cooling System – Operation and Prevention

A functional coolant hose is crucial for protecting the engine against overheating, cavitation, and uneven temperature distribution. Replacing worn or leaking cooling system sections is one of the basic preventive measures, especially in vehicles operated under variable thermal conditions. More practical information on overheating symptoms, diagnostics, and the role of individual components can be found in the article Engine Cooling System – Overheating, Repair, and Used Radiators.

Expanding the Audi Cooling System

If you are planning a comprehensive repair or upgrade of the cooling system area in your Audi and need other parts from the same group, such as additional hoses, return pipes, or radiator connection sections, check the available parts in the Audi Cooling System Hoses and Pipes category.