Coolant Hose Mercedes W205 Diesel M651 Oil Cooler Water Hose A2055017984

Description

The Mercedes W205 Diesel M651 Oil Cooler Water Hose is an original cooling system component designed for diesel engines of this series. Engineered by Mercedes, it ensures proper coolant flow through the oil cooler, stabilizing the engine’s operating temperature. Its precise fit in terms of geometry and connection diameter facilitates installation and reduces the risk of leaks.

Specifications and technical data

• SKU: A2055017984
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055017984
• Substitutable numbers: A2055017984, A 205 501 79 84
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The oil cooler water hose in the Mercedes W205 Diesel model is responsible for transporting coolant between the engine circuit and the oil heat exchanger. A correctly selected component:

• stabilizes engine oil temperature in urban and highway conditions,
• reduces the risk of engine overheating under heavy load,
• supports uniform cooling, contributing to the longevity of the diesel engine.

Thanks to its construction aligned with factory cooling system specifications, the hose integrates seamlessly with other components without requiring modifications.

Benefits of Using an Original Water Hose

Choosing the right hose within the Cooling System Hoses and Pipes category directly impacts the safety of the diesel engine’s operation. Using an original solution for the W205 M651 ensures:

• a secure fit to the oil cooler and cooling system connections,
• appropriate hose flexibility while maintaining resistance to operating temperatures,
• consistency with the factory routing in the engine bay, minimizing the risk of abrasion.

This solution is particularly recommended for replacement after a leak, rubber cracking, or intervention in the diesel engine’s cooling system.

Component Condition and Diesel Engine Application

The offered hose is a used part, allowing for optimized service costs while maintaining factory specifications. Its designation for Diesel engines means it was designed to withstand the higher thermal loads typical of diesel engines, especially during prolonged driving with high torque.

Replacement of the oil cooler water hose is recommended, among other things, in cases of:

• visible cracks or swelling of the rubber,
• trace coolant leaks around the oil cooler,
• preventive cooling system service in vehicles with higher mileage.

Technical Support and Additional Information

To better understand the impact of a functional coolant circulation and oil cooler on engine durability, it is worth consulting the guide: Engine Cooling System – Overheating, Repair, and Used Radiators. The article explains how minor leaks or reduced cooling efficiency can lead to serious engine damage.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and require other parts from the same group, such as return pipes, supply hoses, or flexible sections connecting to the radiator, check the available parts in the Mercedes Cooling System Hoses and Pipes category.