Mercedes Vito W639 OM651 Diesel Engine Radiator Coolant Cooler A6395011101

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 OM651 Diesel Engine Radiator Coolant Cooler is an original component from the Water radiators group, designed for the cooling system of diesel units. This used OEM part ensures a factory-fit for the OM651 engine, which translates into stable thermal operation and predictable performance of the entire powertrain.

Specifications and technical data

• SKU: A6395011101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6395011101
• Substitutable numbers: A6395011101, A 639 501 11 01
• Fuel type: Diesel
• Category: Radiators

Purpose and compatibility

The presented radiator is dedicated to Mercedes Vito and Mercedes Viano W639 generation models with the OM651 diesel engine. Using the correct radiator in a diesel-powered vehicle is crucial for maintaining the proper operating temperature, protecting the cylinder head, seals, and other powertrain components.

Thanks to its design compliant with manufacturer standards, the radiator works with factory cooling system equipment, which facilitates installation and reduces the risk of leaks. This solution is particularly beneficial for servicing commercial vehicles, where repeatability and reliability are key.

Construction and role in the cooling system

The engine radiator from this series is responsible for effectively dissipating heat from the coolant circulating between the engine block and the heat exchanger. In diesel units such as the OM651, thermal loads are higher than in many gasoline units, which is why using a properly selected radiator is especially important.

Key functions of this component include:

• stabilization of engine operating temperature across a wide range of loads,
• protection against overheating during high-load driving or in high ambient temperatures,
• cooperation with the thermostat, fan, and other cooling system components.

A properly functioning radiator influences the service life of the powertrain, reduces the risk of thermal deformation, and helps maintain stable engine operating parameters in daily use.

Benefits of using an original used radiator

Choosing a used OEM radiator for the Mercedes Vito/Viano W639 is a solution that allows you to balance cost control with maintaining factory specifications. The original component from the Water radiators group is designed for the specific operating conditions of the OM651 engine, which translates into:

• secure fitment to cooling system mounts and connections,
• maintenance of the heat exchange efficiency intended by the manufacturer,
• consistency with other system components (hoses, expansion tank, fan).

A used OEM part is also a good option for maintenance repairs in fleet vehicles, where parameter repeatability and predictable cooling system behavior over the long term are important.

Condition, verification, and service application

The item is offered as a used engine radiator, meaning it has been removed from a vehicle and is intended for further use after proper installation. Before installation, standard service procedures are recommended: flushing the system, checking hoses, clamps, and tightness, as well as verifying the operation of the thermostat and fan.

A cooling system prepared in this way in a Mercedes Vito or Viano W639 with a diesel engine allows for safe operation both in city traffic and during long-distance highway driving or work under load (transport, special conversions).

Technical support and additional materials

To better understand the impact of ambient temperature on the cooling system and the cost-effectiveness of using used components, it is worth reading the guide: Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. The article discusses practical aspects of operating radiators and fans in high temperatures and indicates how to rationally approach the selection of dismantled parts.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as radiator cores, expansion tanks, or cooling modules, check the available parts in the Mercedes Water radiators category.