Audi A3 8V Volkswagen Passat B8 Seat Leon Mk3 Coolant Hose 2.0 TFSI 5Q0122101DT

Audi A3 8V Volkswagen Passat B8 Seat Leon Mk3 Coolant Hose 2.0 TFSI is an original component from the Lines, hoses and pipes group, designed for the cooling system of the 2.0 TFSI petrol engine in popular VAG group models. It is a practical solution for users who want to maintain factory coolant flow characteristics and compatibility with original connectors and mounts.

Specifications and technical data

• SKU: 5Q0122101DT
• Mark: Audi
• Condition: Used
• OEM Part Number: 5Q0122101DT
• Substitutable numbers: 5Q0122101DT, 5Q0 122 101 DT
• Category: Hoses, Lines & Pipes

Purpose and function of the coolant hose

The presented coolant hose is a cooling system component responsible for the stable transport of fluid between key 2.0 TFSI engine sub-assemblies. The properly shaped geometry of the hose allows for collision-free routing in the engine bay, while maintaining the required bending radii and clearances relative to other components.

Thanks to its factory design, the hose ensures:

• an appropriate coolant flow cross-section,
• correct positioning of the connectors relative to the radiator and engine,
• stable system operation within the typical operating temperature ranges of the 2.0 TFSI unit.

Construction and fitment for Audi, VW and Seat models

The hose has been designed for use on the MQB platform, which translates into a precise fit for Audi A3 8V, VW Passat B8, and Seat Leon Mk3 models. The design of the hose takes into account factory mounting points, routing along body elements, and compatibility with original clamps and connectors.

Its original origin from the Audi brand means that the hose complies with the factory quality standards used in the VAG group, which facilitates installation and reduces the risk of leaks resulting from mismatched shapes or diameters.

Benefits of using an original coolant hose

Using a factory coolant hose in a 2.0 TFSI engine helps maintain stable thermal conditions for the power unit, which is important for both engine durability and the operation of auxiliary equipment. Compared to generic replacements, the original hose provides:

• consistency with the factory cooling system design,
• correct alignment relative to the fan, radiator, and covers,
• preservation of the safety margins for temperature and pressure specified by the manufacturer.

This solution is particularly beneficial for servicing vehicles used on a daily basis, where operational predictability and reducing the risk of overheating-related failures are paramount.

Characteristics of the used product

The item is offered as a used part, which represents a reasonable compromise between repair costs and maintaining the vehicle's original specifications. For many users, this is an effective way to restore cooling system efficiency while maintaining factory manufacturing standards.

In the case of original aftermarket components, it is also important that they remain compliant with the manufacturer's service documentation, which facilitates diagnostics and any future work on the cooling system.

Support with selection and additional information

For precise fitment to a specific engine version and vehicle model year, it is crucial to verify markings such as SKU, OEM part number, and available interchangeable numbers in the technical specifications section. This helps avoid mistakes when selecting the hose for a given Audi A3 8V, VW Passat B8, or Seat Leon Mk3 variant.

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

To better understand how using original aftermarket components affects a vehicle's resale value, it is worth reading the article: Original used parts and car resale value – how not to lose money?.