Mercedes-Benz C W203 M111 C 180 Coolant Mechanical Water Pump A1112012301

The MERCEDES C-Class W203 M111 C180 Water Pump is a cooling system component designed for installation at the front of the engine. A used pump from this series helps maintain the original coolant circulation characteristics, ensuring stable engine operating conditions and reducing the risk of overheating. This is a solution for users seeking a proven, original component instead of replacements with uncertain parameters.

Specifications and technical data

• SKU: A1112004301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1112004301
• Substitutable numbers: A1112004301, A 111 200 43 01, A1112012301, A 111 201 23 01, BG
• Location on the vehicle: Front
• Category: Water Pumps

Purpose and Function of the Water Pump

The water pump in the M111 C180 engine is responsible for forcing the circulation of coolant between the engine block, cylinder head, and radiator. A properly functioning component of this type stabilizes the operating temperature, which contributes to the engine's lifespan, seal integrity, and correct operation of auxiliary components. Precise fitment for the specific engine version minimizes the risk of leaks and installation issues.

Construction and Vehicle Placement

The presented water pump belongs to the Water Pumps category and is mounted at the front of the powertrain, facilitating service access. This placement allows for efficient replacement as part of standard maintenance work, without the need to interfere with interior vehicle components. The construction is prepared to work with the original accessory drive in the M111 engine, thus maintaining compatibility with the original cooling system.

Benefits of Using an Original Mercedes Water Pump

Using a water pump dedicated to the C-Class W203 with the M111 C180 engine allows for maintaining the cooling system's operating parameters at the level intended by the manufacturer. Key benefits include:

• maintaining the original coolant flow and thermostat operating characteristics,
• compatibility with original engine accessories and belt systems,
• reducing the risk of engine overheating under load,
• easier diagnostics in case of potential cooling system malfunctions.

For users who prioritize technically sound service solutions, choosing a water pump matched to the specific model and engine is crucial for long-term, stable operation.

Selection by OEM Number and Interchangeable Numbers

This water pump is an original part with an assigned OEM part number and additional interchangeable numbers, which facilitates unambiguous identification in service catalogs and parts selection systems. In practice, this means the ability to precisely match the component to a specific C-Class W203 configuration, without the need for universal replacements. If you have doubts about selection, it is advisable to use the OEM number or reference numbers to avoid installation problems.

Condition and Service Application

The offered water pump is a used component, making it an attractive option for repairs where cost-effectiveness is important. This type of part is suitable for both standard replacement as part of cooling system maintenance and for larger service jobs related to engine overhaul. Using an original component helps maintain the integrity of the entire system and simplifies subsequent diagnostics.

If you are planning comprehensive cooling system service for your Mercedes and are considering replacing multiple components simultaneously, check the available parts in the Mercedes Water Pumps category.

When planning service work, it is also worth paying attention to related vehicle systems, such as engine fuel supply, so an article describing fuel system, injectors, pumps, and fuel tank – maintenance and repair, where you will find practical tips on diagnostics and selecting parts by OEM numbers, may be helpful.