Coolant Hose Mercedes W204 Diesel OM651 EGR Cooler Valve Line A6512030882

The Mercedes W204 Diesel OM651 EGR Valve Coolant Hose is a precisely engineered cooling system component, dedicated to OM651 diesel engines. It is responsible for the controlled flow of coolant in the EGR valve area, supporting stable engine operating temperatures and reducing the risk of overheating. By maintaining factory geometry and connection diameters, this hose ensures proper compatibility with the original cooling system in the Mercedes W204 diesel.

Specifications and technical data

• SKU: A6512030882
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6512031882
• Substitutable numbers: A6512030882, A 651 203 08 82, A6512031882
• Fuel type: Diesel
• Category: Coolant Hoses

Function of the Hose in the EGR Cooling System

The presented hose belongs to the Cooling System Hoses and Pipes group and operates in the area connecting the radiator to the EGR valve. In practice, this means that it:

• directs coolant to the zone with elevated exhaust gas temperatures recirculated by the EGR,
• supports maintaining a stable fluid temperature in the auxiliary circuit,
• limits local overheating of engine accessory components,
• helps maintain correct operating parameters for the OM651 diesel engine.

Thanks to its proper shaping and fit to the spigots, the hose minimizes installation stresses and the risk of leaks in the critical area near the EGR valve.

Designed for OM651 Diesel Engines

The component has been designed for engines powered by Diesel fuel, which is important both in terms of operating temperatures and the characteristics of the exhaust gas recirculation system. In OM651 engines, the EGR cooling system is particularly stressed, which is why a properly selected hose:

• ensures stable fluid flow under high temperature and pressure conditions,
• reduces the risk of micro-cracks and leaks in the EGR zone,
• supports uniform cooling of components cooperating with the exhaust system.

Selecting a component dedicated to a specific fuel type and engine family translates to greater reliability of the entire cooling system in the Mercedes W204.

Characteristics and Benefits of Using an Original Hose

The EGR valve radiator coolant hose for Mercedes has been manufactured in accordance with the vehicle manufacturer's original specifications. In practice, this means:

• maintaining the original routing geometry of the pipe in the engine bay,
• proper fit to the radiator and EGR valve spigots,
• compatibility with factory clamps and mounting brackets,
• maintaining the flow parameters required by the cooling system.

A component constructed in this way allows for the efficient replacement of a worn or damaged pipe without the need for installation modifications, which is important for both mechanics and users who care about compliance with Mercedes technical documentation.

Used Condition and Installation Aspects

The offered hose is a used part, allowing for an economical repair of the cooling system while maintaining the original manufacturer's specifications. Before installation, a standard visual inspection for any signs of wear is recommended, as well as a leak test after installation in the vehicle. A properly selected hose in the EGR area:

• reduces the risk of coolant leaks in the high-temperature zone,
• allows for maintaining correct pressure in the cooling system,
• supports the trouble-free operation of the diesel engine in urban and highway conditions.

Part Selection by Numbers and Technical Support

This hose model has an assigned OEM part number and interchangeable numbers, which facilitates precise identification and comparison with the part currently installed in the vehicle. If you have doubts when selecting components for the cooling system, it is worth using the practical tips contained in the article Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses the impact of cooling efficiency on the lifespan of powertrains of various brands, including Mercedes.

Additionally, when purchasing used cooling system parts, the guide How to Professionally Select Used Car Parts Considering OEM Compatibility may be helpful, explaining how to interpret manufacturer markings and avoid incorrect choices.

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 return pipes, supply hoses, or flexible sections at the radiator, check the available parts in the Mercedes Cooling System Hoses and Pipes category.