Mercedes-Benz W163 W203 W210 OM611 OM612 Engine Coolant Water Pump A6112001201

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes-Benz W163 W203 W210 OM611 OM612 Engine Coolant Water Pump is an original cooling system component designed for installation at the front of the engine, specifically engineered for Mercedes vehicles. This used part from the Water pumps category allows for an economical yet technically sound repair of the cooling system, maintaining the factory coolant flow characteristics.

Specifications and technical data

• SKU: A6112001201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6112001201
• Substitutable numbers: A6112001201, A 611 200 12 01, A6112000201, A 611 200 02 01
• Location on the vehicle: Front
• Category: Water Pumps

Purpose and function in the cooling system

The water pump in Mercedes W163, W203, and W210 models is responsible for forcing coolant circulation between the engine block, cylinder head, and heat exchanger. A properly functioning pump stabilizes the engine's operating temperature, reduces the risk of overheating, and supports uniform heat dissipation under engine load.

The location on the vehicle in the front engine area facilitates service access while ensuring optimal power transmission from the belt drive system. Thanks to a design consistent with factory Mercedes standards, the component maintains the correct geometry of mounts and flow channels, which translates into stable operation of the entire cooling system.

Benefits of using an original Mercedes water pump

Using an original water pump in Mercedes vehicles provides a number of practical technical benefits:

• preservation of factory coolant flow parameters in the engine,
• proper fitment to the front engine accessories,
• compatibility with factory mounts and belt systems,
• consistency with Mercedes service documentation and parts catalogs.

As a result, the pump can be used both for standard maintenance replacements and for more extensive cooling system service work, such as replacing the radiator, thermostat, or coolant hoses.

Selection by numbers and vehicle compatibility

The element has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification in catalogs and parts selection systems. In practice, this means the ability to unambiguously match the pump to a specific engine version in W163, W203, and W210 bodies, without the risk of dimensional incompatibility or differences in housing construction.

When selecting, it is recommended to verify compatibility by OEM number or reference numbers, as well as to compare the design with the removed component. This approach minimizes the risk of error and reduces vehicle downtime in the workshop.

Component condition and service application

The water pump is offered as a used part, which allows for lower repair costs while maintaining the manufacturer's original specifications. This type of solution is often chosen for older vehicle generations, where a reasonable balance between repair cost and maintaining correct engine performance parameters is key.

Due to its location at the front of the engine, the pump replacement can be combined with other service activities, such as replacing the accessory belt, idler pulleys, or tensioner, which allows for optimizing the mechanic's working time and limiting the number of future disassemblies.

Expanding technical knowledge

When planning service work, it is worth paying attention to related vehicle systems, in particular the coolant circuit and cooperation with other engine components. For a better understanding of the principles of selecting components by OEM numbers and how to diagnose engine power components, an article discussing the fuel system, injectors, and pumps may be helpful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

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 additional pumps, housings, or mounting elements, check the available parts in the Mercedes water pumps category.