Water Pump Mercedes W212 W222 Coolant Circulation Control Unit A2118350028

Mercedes W212 W222 Water Pump A2128350164 is an original part from the Water Pumps group, designed for use in premium Mercedes-Benz vehicles. Thanks to its factory OEM construction, it ensures proper coolant circulation parameters and stable cooperation with the engine system, which translates into safe and predictable operation.

Specifications and technical data

• SKU: A2128350164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128350164
• Substitutable numbers: A2128350164, A 212 835 01 64, A2118350028, A 211 835 00 28, KZ
• Category: Water Pumps

Purpose and Role in the Cooling System

The water pump in Mercedes E-Class and S-Class models is responsible for the forced circulation of coolant between the engine block, cylinder head, and heat exchangers. A properly functioning component maintains the stable operating temperature of the powertrain, reduces the risk of overheating, and supports uniform heat dissipation in both urban and highway conditions.

The original water pump dedicated to the W212 and W222 platforms is designed for the specific flow rates, pressures, and operating characteristics of the engines used in these Mercedes generations. This ensures compatibility with factory control systems and proper fit with hoses, mounts, and accessories.

Construction and Fitment for Mercedes

This OEM version of a part from the Water Pumps category for Mercedes features a construction optimized for durability and system sealing. The housing, impeller, and seals are selected to work with the factory coolant and the typical operating temperatures of the powertrains used in the W212 and W222.

The pump is prepared for installation in place of the original component, maintaining the original mounting points and connection geometry. This simplifies the mechanic's work, reduces replacement time, and minimizes the risk of leaks due to component mismatch.

Benefits of Using an Original Mercedes Water Pump

Using an original water pump in a Mercedes W212 or W222 allows for maintaining the integrity of the entire cooling system according to the manufacturer's specifications. In practice, this means:

• stable coolant flow across the full range of engine loads,
• proper cooperation with the thermostat and other system components,
• reduced risk of powertrain overheating,
• better predictability of the vehicle's behavior in high ambient temperatures.

For the user, this translates to more consistent engine operating conditions and a reduced risk of costly repairs resulting from improper cooling. Choosing an original component is particularly important in premium vehicles where auxiliary systems are precisely tuned to specific engine configurations.

Product Condition and Service Application

The offered water pump is a used part, making it an attractive cost-effective alternative while retaining the factory design and fit for Mercedes. This type of part is suitable for both standard replacement of a worn component and for repairs performed as part of optimizing the service budget.

Due to its origin from the original production line, the pump maintains compatibility with factory mounts, hoses, and engine accessories, which simplifies installation and reduces the need for additional modifications.

Selection by Numbers and Technical Support

The water pump has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification and selection for a specific vehicle configuration. When selecting, it is advisable to use catalog data and information from service documentation to ensure compatibility with the specific engine version and model year.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as additional pumps, coolant circulation components, or related cooling parts, check the available parts in the Mercedes Water Pumps category.

For a deeper understanding of diagnostics and component selection by OEM number, as well as the principles of operating systems with working fluids, an article describing the operation and maintenance of fuel systems may be helpful – you can find it here: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.