Water Pump Mercedes W203 W209 Auxiliary Heater A2038350164

The Mercedes W203 W209 Water Circulation Pump is an original cooling system component designed for installation in the rear of the vehicle, specifically for Mercedes models. This used pump ensures a factory fit, simplifying installation and maintaining the proper operating parameters of the thermal system. It's a solution for users who expect a proven part with a construction that adheres to the manufacturer's standards.

Specifications and technical data

• SKU: A2038350164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038350164
• Substitutable numbers: A2038350164, A 203 835 01 64
• Location on the vehicle: Rear
• Category: Water Pumps

Purpose and Function of the Water Circulation Pump

The water circulation pump from the series used in Mercedes W203 and W209 is responsible for forcing the coolant flow in the rear part of the system, stabilizing the operating temperature of the components. A properly functioning water circulation system reduces the risk of overheating, supports even heat dissipation, and contributes to the durability of components interacting with the cooling system.

Its placement in the rear zone of the vehicle allows for precise control of the medium's flow in the further sections of the cooling installation, which is particularly important in designs where the thermal distribution of the body and components is more complex.

Benefits of Using an Original Pump in Mercedes W203 / W209

Using a water circulation pump dedicated to specific Mercedes generations translates to:

• maintaining compatibility with the factory cooling system geometry,
• proper fit of connections and mountings,
• stable operation within typical thermal load ranges,
• reduced risk of leaks resulting from ill-fitting aftermarket parts.

For the user, this means more predictable cooling system operation and less susceptibility to problems arising from incorrect installation or structural differences between universal aftermarket parts.

Installation and Operational Characteristics

The water circulation pump designed for the rear of the vehicle is engineered for operation in limited installation space, taking into account the routing of hoses and mounting elements typical for the W203/W209 platform. This ensures a streamlined installation process without the need for modifications to the original cooling system.

The used component allows for economical repair while maintaining the original construction specification. Before installation, a standard check of the cooling system's condition, hose tightness, and proper bleeding is recommended to fully utilize the pump's capabilities and avoid secondary failures.

Matching by Numbers and Technical Support

The water circulation pump belongs to the Water Pumps category, which facilitates its identification in parts catalogs and selection based on the specific vehicle configuration. The presence of the OEM part number and interchangeable numbers in the technical specification allows for precise component matching to a given Mercedes model, including using electronic catalogs and VIN search.

If you want to better understand the relationships between pumps, other components of liquid and fuel systems, and the principles of parts selection by numbers, the article describing diagnostics and operation will be helpful – check out the material: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.

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