Audi S4 B8 Engine Water Coolant Flange Housing 3.0 TFSI Petrol 06E121161AN

Audi S4 B8 Thermostat Housing Water Flange 3.0 TFSI Gasoline is a component from the Thermostats and Housings group, designed for the cooling system of a 3.0 TFSI gasoline engine. It is responsible for the stable flow of coolant and the proper connection of the thermostat with other system components, which directly impacts the operational safety of the powertrain. A used genuine Audi part helps maintain factory flow characteristics and mounting fit.

Specifications and technical data

• SKU: 06E121161AN
• Mark: Audi
• Condition: Used
• OEM Part Number: 06E121161AN
• Substitutable numbers: 06E121161AN, 06E 121 161 AN
• Fuel type: Petrol
• Category: Thermostats & Housings

Purpose and Function in the Cooling System

The thermostat housing with water flange in the Audi S4 B8 plays a crucial role in controlling the operating temperature of the 3.0 TFSI engine powered by gasoline. This component:

• directs coolant between the thermostat and the cooling system hoses,
• ensures a sealed connection with the engine block and the cooling system,
• supports the maintenance of the powertrain's stable operating temperature,
• reduces the risk of engine overheating or undercooling during dynamic driving.

By preserving the original geometry of the flange and housing, the coolant flow remains consistent with the manufacturer's specifications, which is essential for engine durability and proper accessory operation.

Benefits of Using a Genuine Thermostat Housing

Using a factory thermostat housing in the Audi S4 B8 offers a range of practical operational benefits:

• Precise Mounting Fit – maintains compatibility with factory mounting points and flange diameters.
• Stable Cooling System Performance – proper coolant flow promotes uniform temperature distribution within the engine.
• Reduced Risk of Leaks – designed for original seals and hoses.
• Compatibility with Other Audi Cooling System Components – no need for adaptations or modifications.

For owners of 3.0 TFSI engines, choosing a genuine housing with a water flange is a solution that simplifies servicing and reduces the risk of future cooling problems.

Product Characteristics and Service Application

The presented thermostat housing with water flange belongs to the Thermostats and Housings category, meaning it is intended for tasks related to the cooling system and engine temperature regulation. It is suitable for both routine replacement of worn parts and more extensive service work, such as:

• addressing leaks around the thermostat or water flanges,
• preventive replacement of cooling system components at higher mileage,
• repairs after engine overheating, when inspection and replacement of critical components are necessary.

A used genuine Audi part helps maintain consistency with the vehicle's factory specifications, which is particularly important in higher-performance cars like the S4 B8 with its 3.0 TFSI engine.

Condition, Origin, and Technical Aspects

The thermostat housing with water flange originates from an Audi vehicle and is classified as a used part. For the informed user, this means the possibility of an economical repair while maintaining original construction and compatibility with the factory cooling system. The product is designed for gasoline engines, which is important when selecting parts within the Audi engine range.

By adhering to the original specifications, installation is similar to factory standards – without the need for hose modifications, additional adapters, or changes to the cooling system. This is a solution that simplifies work for workshops and users who service their vehicles themselves.

Expanding Audi Cooling System Service

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as housings, thermostats, or water flanges, check the available parts in the Audi Thermostats and Housings category.

For those interested in a broader perspective on the evolution of design and parts in the premium segment, an article describing the changes in successive generations of executive sedans may be helpful – you can find it here: Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years.