Mercedes W212 OM651 Coolant Hose Connector Thermostat Pump Outlet A6512033082

The Mercedes W212 OM651 Coolant Hose Thermostat Connector is an original part from the Cooling System Hoses and Pipes group, designed for use in the OM651 engine cooling system. This used OEM component ensures proper coolant flow between the thermostat and other system elements, supporting stable engine operating temperature and safe heat dissipation.

Specifications and technical data

• SKU: A6512033082
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6512033082
• Substitutable numbers: A6512033082, A 651 203 30 82
• Category: Coolant Hoses

Function in the OM651 Engine Cooling System

The presented coolant hose serves as a connector between the thermostat and the rest of the cooling system in Mercedes W212 models with the OM651 engine. It is responsible for:

• stable coolant flow in the thermostat area,
• maintaining the seal of connections at a critical point in the system,
• compatibility with the factory geometry of pipes and spigots in the engine bay.

Thanks to its precise fit for the OM651 engine architecture, the hose maintains its correct routing, does not interfere with other components, and allows the thermostat to operate correctly across its full working temperature range.

Original Origin and Mercedes Fitment

As a Mercedes brand part, the hose has been designed according to the vehicle manufacturer's factory standards. This means:

• maintaining the original diameter of the connections and the shape of the connector,
• compatibility with factory clamps and mountings,
• consistency with the cooling system operating parameters specified for the OM651 engine.

A used OEM component is a solution that allows the cooling system to be maintained in the configuration intended by the manufacturer, without the need for adaptations or modifications.

Component Condition and Installation Aspects

The coolant hose is offered in used condition, which in practice means retaining its original geometry and mounting points while offering an attractive price compared to a new part. Before installation, a standard visual inspection is recommended for:

• the seal of the working surface,
• the condition of the spigots and edges that interface with the clamps,
• the absence of mechanical damage in the bent areas.

With proper installation, using appropriate clamps and following the vehicle manufacturer's procedure, the hose can continue to operate in the cooling system, ensuring correct coolant circulation in the thermostat area.

Benefits of Using an Original Cooling Hose

Using an original thermostat connector in the Mercedes W212 with the OM651 engine allows for the preservation of the cooling system's factory operating characteristics. The most important benefits include:

• precise fit for the specific model – no issues with length, diameter, or bend angle,
• compatibility with other cooling system components,
• the ability to utilize existing mounting points in the engine bay.

For users seeking a technically correct replacement for a component sensitive to temperature and pressure, a used OEM hose offers a sensible compromise between cost and maintaining factory operating parameters.

More Cooling System Parts and Technical Advice

If you are planning comprehensive service for your Mercedes' cooling system and need other parts from the Cooling System Hoses and Pipes group dedicated to this brand, check the available parts in the Mercedes Cooling System Hoses and Pipes category.

To better understand how high ambient temperatures affect cooling system efficiency and when it's worth considering replacing components like hoses, radiators, or fans with used parts, read the guide Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings, which will help you plan maintenance with durability and operational economy in mind.