Mercedes W447 OM622 Diesel Engine Radiator Coolant Hose Pipe A4475014800

The Mercedes W447 OM622 Diesel Coolant Hose is an original part from the Cooling System Hoses and Pipes group, designed for OM622 diesel engines. It ensures a leak-proof and stable flow of coolant, which translates to a safe operating temperature for the engine and predictable cooling system performance in daily use.

Specifications and technical data

• SKU: A4475014800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4475014800
• Substitutable numbers: A4475014800, A 447 501 48 00
• Fuel type: Diesel
• Category: Coolant Hoses

Function and Role in the Cooling System

The coolant hose in a Mercedes with an OM622 diesel engine is responsible for the controlled flow of the medium between the radiator and other system components. A correctly selected and sealed hose:

• stabilizes the coolant circulation across the entire range of engine loads,
• reduces the risk of engine overheating,
• ensures the correct operating pressure in the cooling system,
• minimizes heat energy loss in critical sections of the system.

Thanks to its construction in line with factory Mercedes standards, the hose integrates with mounting elements and system spigots without requiring modifications, which simplifies servicing and reduces vehicle downtime.

Benefits of Using an Original Mercedes Hose

Using a coolant hose dedicated to the OM622 Diesel engine allows for the preservation of the cooling system's original operating characteristics. In practice, this means:

• a precise fit to the geometry of the engine bay and radiator,
• correct hose routing while maintaining required bending radii,
• compatibility with factory clamps and connectors,
• reduced risk of chafing and leaks resulting from improper installation.

This solution is particularly beneficial for vehicles used intensively, where a stable diesel engine operating temperature directly impacts the durability of auxiliary components and user comfort.

Condition, Purpose, and Vehicle Selection

The offered hose is a used part, making it an attractive cost-effective alternative while maintaining the original manufacturer's specifications. It serves as a replacement in cases of damaged factory hoses, leaks, or visible rubber wear in the cooling system.

When selecting a part, it is important to ensure compatibility with the specific engine version and cooling system configuration of your Mercedes W447. The product has assigned part numbers and interchangeable numbers, which facilitates compatibility verification with the vehicle based on catalog data.

Diesel Cooling System – Operation and Diagnostics

Diesel engines are particularly sensitive to incorrect operating temperatures, making a functional coolant hose crucial for protecting the engine from overheating. Any signs of coolant on the hose, drops in the expansion tank level, or the smell of coolant in the engine bay are signals to inspect this component and replace it if necessary.

If you want to better understand how individual components – from the radiator to the hoses – affect engine durability, check out the article Engine Cooling System – Overheating, Repair, and Used Radiators, where you will find practical tips on diagnosing and servicing cooling systems in various models.

Mercedes Cooling System Expansion and Service

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 hoses, return pipes, or sections connecting the radiator to the engine block, check the available parts in the Mercedes Cooling System Hoses and Pipes category.

By using parts from the same product group, you can consistently renew the entire coolant flow path, reducing the risk of future leaks and ensuring predictable diesel engine operating conditions over the long term.