Thermostat Housing Mercedes W202 W203 W210 Petrol M111 Coolant Tube A1112030573

Thermostat Housing Mercedes W202 W203 W210 Petrol M111 Coolant Tube is an original cooling system component from the Thermostats and housings category, designed for M111 petrol engines. This used OEM part ensures a factory fit, stable thermostat mounting, and proper coolant circulation in Mercedes power units. It is a practical solution for users looking to restore the correct operation of the cooling system without modifying the engine structure.

Specifications and technical data

• SKU: A1112001303-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1112001303
• Substitutable numbers: A1112001303, A 111 200 13 03, A1112030173, A 111 203 01 73
• Fuel type: Petrol
• Category: Thermostats & Housings

Purpose and function in the cooling system

The thermostat housing in the M111 engine is responsible for the precise seating of the thermostat and a leak-proof connection to the coolant channels. The correct body geometry allows for:

• maintaining a stable operating temperature of the petrol unit,
• reducing the risk of engine overheating or undercooling,
• ensuring the correct direction of fluid flow in both small and large circuits.

Thanks to a design compliant with factory Mercedes standards, the housing works with standard cooling system connectors, hoses, and sensors, which facilitates installation in the engine bay.

Compatibility with the M111 petrol engine

The presented Thermostat Housing Mercedes W202 W203 W210 Petrol M111 Coolant Tube has been designed for use in popular Mercedes W202, W203, and W210 petrol models. The use of original mounting and connection geometry allows for:

• seamless fitment with the engine block and accessories,
• maintaining the factory routing of cooling hoses,
• reducing the need for additional installation modifications.

This solution is particularly beneficial when servicing older M111 units, where dimensional compliance and maintaining the original cooling system operating parameters are crucial.

Characteristics of the used OEM part

The thermostat housing is sourced from dismantling and is offered as a used original Mercedes component. This type of part ensures:

• factory quality of the casting and sealing surfaces,
• compatibility with standard bolts and gaskets,
• the possibility of installation in place of a worn or damaged housing without structural changes.

Choosing a used OEM part is often economically advantageous while maintaining the parameters specified by the vehicle manufacturer.

Benefits of replacing the thermostat housing

Replacing a worn or cracked thermostat housing in an M111 petrol engine helps restore stable cooling system operation. The main advantages of installing this component include:

• reduction of coolant leaks around the thermostat area,
• improved connection tightness and seal durability,
• maintaining the correct operating temperature, which promotes the longevity of the engine and its accessories.

By maintaining the original design, the housing does not negatively affect the operation of the water pump, radiator, or heater, supporting stable operating conditions for the power unit.

Expanding Mercedes cooling system service

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as thermostat bodies, covers, or cooling system connections, check out the available parts in the Mercedes Thermostats and housings category.

More about upgrades and used parts

If you are interested in a broader context of using used parts, upgrade strategies, and the impact of individual components on a car's character, it is worth reading an article describing the evolution of one of the most popular hot hatches – Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – structural changes and VW car parts. This is a good supplement to your knowledge when planning informed repairs and modifications for cars of other brands as well.