Mercedes W205 Water Pipe Engine Cooling Coolant Hose Line OM651 A2055000900

The Mercedes W205 Coolant Hose OM651 is a cooling system component designed for C-Class W205 models with the OM651 engine. A used coolant hose allows for a technical, economical, and safe repair of the existing cooling system, while maintaining the factory fluid flow characteristics.

Specifications and technical data

• SKU: A2055000900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055000900
• Substitutable numbers: A2055000900, A 205 500 09 00
• Part type: Line
• Category: Coolant Hoses

Application and Function in the Cooling System

The coolant hose is responsible for the stable routing of coolant between the system components in the OM651 engine within the W205 body. A correctly selected hose ensures:

• maintaining proper coolant flow across the entire engine load range,
• reducing the risk of engine overheating through a sealed connection of system components,
• compatibility with the factory component layout in the Mercedes W205 engine bay.

This part belongs to the Cooling System Hoses and Pipes category, meaning it is designed to operate in an environment of high temperatures and variable pressure.

Benefits of Using an Original Mercedes Hose

Using a coolant hose from the Mercedes offering allows for the cooling system's operating parameters to be maintained in line with the vehicle manufacturer's specifications. Key advantages include:

• factory hose geometry – proper profiling facilitates installation and eliminates stress on spigots and connectors,
• appropriately selected internal diameter – ensures stable fluid flow without unnecessary throttling,
• designed for the OM651 engine – compatible with the spigot layout and auxiliary components in the Mercedes W205.

As a result, the hose can be used as a replacement for a damaged part without requiring system modifications.

Item Condition and Installation Aspects

The hose is part of the used parts category, which helps reduce service costs while maintaining the functionality required for everyday operation. Before installation, a standard visual inspection is recommended to check for leaks, the condition of the working surfaces, and the mounting points for clamps.

During installation, pay attention to:

• correct routing of the hose relative to other components in the engine bay,
• selection of appropriate hose clamps consistent with factory standards,
• bleeding the cooling system after replacement to avoid airlocks.

Technical Support and Cooling System Knowledge

When planning service work, it is advisable to expand your knowledge about the impact of temperature on cooling system efficiency. In our guide, we describe how high temperatures affect radiators, fans, and hoses, and how to wisely use the used parts market – check out the article Summer Heat vs. Cooling System – Used Cooling Components and Savings.

Other Mercedes Cooling System Hoses and Pipes

If you are looking for other Mercedes cooling system hoses and pipes, visit our dedicated subpage where you will find a wide selection of components tailored to various models of this brand: Mercedes cooling system hoses and pipes.