Audi A4 B8 TT FV Thermostat Coolant Housing Valve 2.0 TDI 04L121111H

Audi A4 B8 TT FV Thermostat Coolant Housing Valve 2.0 TDI is a component from the Thermostats and housings group, designed for the 2.0 TDI diesel engine cooling system in Audi vehicles. This is an original part from dismantling, which allows for the restoration of proper coolant circulation and stable operation of the power unit under demanding operating conditions.

Specifications and technical data

• SKU: 04L121111H
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L121111H
• Substitutable numbers: 04L121111H, 04L 121 111 H
• Category: Thermostats & Housings

Purpose and function in the cooling system

The thermostat housing with valve is responsible for controlled regulation of coolant flow between the engine block and the radiator. In the 2.0 TDI engine, the proper operation of this assembly is crucial for:

• maintaining a stable operating temperature of the power unit,
• reducing the risk of overheating during city and highway driving,
• efficient engine warm-up after a cold start,
• proper cooperation with the engine control electronics.

By using the original thermostat housing with valve, the factory geometry of the flow channels and the fitment to other cooling system components are maintained.

Benefits of using an original Audi thermostat housing

Using an original component from the Thermostats and housings group in Audi models provides a number of practical service and operational benefits:

• precise fitment to the 2.0 TDI engine without the need for modifications,
• maintenance of factory cooling system operating parameters,
• reduced risk of leaks at connections with hoses and the engine block,
• consistency with Audi's factory design solutions.

This solution is particularly recommended for repairs where consistency of parameters and compliance with the manufacturer's service documentation are important.

Characteristics of the used component

The offered thermostat housing with valve comes from dismantling, which allows for an economical repair of the cooling system while maintaining the original part specification. This type of component is a popular choice in situations where:

• a quick replacement of a damaged thermostat housing is necessary,
• a favorable cost-to-quality ratio is important,
• components consistent with the factory Audi design are preferred.

Before installation, it is recommended to perform a standard check of connection tightness and the condition of seals, in accordance with service procedures for the cooling system.

Technical support 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 thermostat housings, thermostat inserts, or connection stubs, check the available parts in the Audi Thermostats and housings category.

In the case of broader service work on the suspension and chassis, which often accompany maintenance repairs, practical tips regarding the diagnosis of disturbing noises and optimization of repair costs may be helpful – you will find them in the article Knocking in the suspension? Discover a clever way to restore factory handling precision without spending a fortune at the service center.