Audi RS3 8P RSQ3 8U Engine Cooling System Coolant Hose Pipe 2.5 TFSI 07K121055A

Audi RS3 8P RSQ3 8U Engine Cooling System Coolant Hose Pipe 2.5 TFSI is an original component from the Cooling system hoses and pipes group, designed to operate in the demanding environment of the 2.5 TFSI engine. Engineered by the vehicle manufacturer, it ensures proper coolant routing and stable integration with other system components.

Specifications and technical data

• SKU: 07K121055A
• Mark: Audi
• Condition: Used
• OEM Part Number: 07K121055A
• Substitutable numbers: 07K121055A, 07K 121 055 A
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose is a cooling system component responsible for the controlled flow of fluid between the 2.5 TFSI engine sub-assemblies in Audi RS3 8P and RSQ3 8U models. The properly shaped geometry of the hose minimizes the risk of kinks, flow restriction, and localized overheating, which translates into a stable operating temperature for the power unit. Thanks to its factory-fit design for the specific engine and body configuration, the hose maintains the correct distance from hot and moving parts, reducing the possibility of chafing and operational damage. This is particularly important in high-performance units where the cooling system operates under increased thermal load.

Construction and OEM fitment

As a part prepared by the Audi brand, the cooling system hose has been designed for precise fitment with connectors, clamps, and other components of the factory system. The properly selected diameter, shape, and support points allow for installation without modifications, which facilitates service and reduces the risk of leaks. Original manufacturing also means compliance with factory requirements regarding resistance to temperature, pressure, and coolant exposure. As a result, the hose maintains stable operating parameters across a wide range of loads typical for 2.5 TFSI units used in RS versions.

Benefits of using an original hose

Using this component instead of a worn or non-factory replacement allows for the restoration of the correct flow characteristics in the cooling system. Key advantages include:

• factory fitment for the 2.5 TFSI engine in Audi RS3 8P and RSQ3 8U,
• stable coolant routing under demanding thermal conditions,
• reduced risk of leaks resulting from imprecise fitment,
• easier installation due to the retention of original geometry and mounting points. This is a particularly beneficial solution for servicing vehicles driven dynamically, where the cooling system must operate in a repeatable and predictable manner.

Condition and service application

The item is offered in used condition, which allows for an economical repair of the cooling system while maintaining the manufacturer's original specifications. This type of part is suitable both for replacing a damaged hose and during broader service work related to the cooling system in the 2.5 TFSI engine. When planning diagnostic work or preventive hose replacement, it is worth checking compatibility with manufacturer markings – the product has an assigned OEM part number and corresponding interchangeable numbers, which facilitates verification of fitment for a specific vehicle configuration.

Cooling system service expansion and additional materials

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 pipes, return hoses, or sections connecting to the radiator, check the available parts in the Audi cooling system hoses and pipes category. When working with coolant flow, it is also worth understanding the impact of high temperatures on the entire system. Practical tips on operation and component selection can be found in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which will help you better plan the service and inspection of the cooling system in your car.