Audi RS3 8V Engine Coolant Thermostat Housing 2.5 TFSI DAZA 07K121111C

Audi RS3 8V Engine Coolant Thermostat Housing 2.5 TFSI DAZA is an original cooling system component from the Thermostats and housings group, designed for the 2.5 TFSI DAZA unit. It ensures precise control of the engine operating temperature, which translates into stable performance and safe operating conditions in Audi RS3 8V vehicles.

Specifications and technical data

• SKU: 07K121111C
• Mark: Audi
• Condition: Used
• OEM Part Number: 07K121111C
• Substitutable numbers: 07K121111C, 07K 121 111 C
• Part type: Thermostat Housing
• Category: Thermostats & Housings

Function and role in the cooling system

The thermostat housing integrated with the thermostat is responsible for the controlled opening of the coolant flow between the engine block and the radiator. In the 2.5 TFSI DAZA engine, a properly functioning thermostat is crucial for:

• maintaining the optimal operating temperature of the power unit,
• stabilizing operating parameters under high load,
• reducing the risk of engine overheating or undercooling,
• maintaining proper combustion characteristics and performance.

Thanks to the factory design tailored to the specific cooling system of the Audi RS3 8V, this component works with other parts without the need for modifications.

Original origin and fitment

The presented thermostat housing comes from the Audi line, which means maintaining factory design and material standards. The original geometry of the ports, flow channels, and mounting points guarantees:

• a secure fit with the engine block and cooling system hoses,
• proper coolant flow across the entire temperature range,
• compatibility with sensors and equipment intended for the 2.5 TFSI DAZA unit.

Such fitment reduces the risk of leaks, improper venting, or assembly errors that often occur with aftermarket replacements of different geometry.

Condition and service application

The item is offered in used condition, making it an attractive solution for cooling system maintenance in Audi RS3 8V 2.5 TFSI DAZA vehicles. A used thermostat housing from original Audi production allows for:

• maintaining the factory operating characteristics of the thermostat,
• reducing repair costs while maintaining the OEM standard,
• consistency with other cooling and engine control system components.

This solution is particularly recommended for preventive replacements, repairs after overheating, or upgrading the 2.5 TFSI DAZA unit for higher operational loads.

Benefits of choosing an original thermostat housing

Choosing an original thermostat housing for the Audi RS3 8V 2.5 TFSI DAZA provides a number of practical service and operational benefits:

• Stable cooling system operation – proper opening and closing of the coolant circuit depending on load and temperature.
• Full compatibility with the DAZA unit – no need for modifications, hose adjustments, or additional adapters.
• Hassle-free installation – factory mounting points and port layout facilitate the mechanic's work and shorten service time.
• Consistency with control electronics – maintaining the parameters specified by the manufacturer for the cooling system and engine controller.

For Audi RS3 8V users who expect predictable behavior from the 2.5 TFSI DAZA engine both in daily driving and during dynamic use, this is a technically sound solution.

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 housings, inserts, or temperature control modules, check the available parts in the Audi Thermostats and housings category.

To better understand the advantages of using original, used components in the cooling system and other subassemblies, it is worth reading the article OEM quality assurance and safety – why used original car parts are the best choice for your car?, which explains how to consciously select service parts for durability and safety.