Mercedes ML W164 Water Pipe Engine Cooling Coolant Hose Line A1645000175

Mercedes ML W164 Water Pipe Engine Cooling Coolant Hose Line is a component from the Cooling system hoses and pipes group, designed for operation in the coolant circuit of Mercedes vehicles. It is responsible for the stable flow of fluid in the system, which directly affects engine operating temperature and operational safety. Using an OEM component is a sensible choice when servicing the cooling system if you value factory geometry and fitment.

Specifications and technical data

• SKU: A1645004175
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645004175
• Substitutable numbers: A1645004175, A 164 500 41 75, A1645000175, A 164 500 01 75
• Category: Coolant Hoses

Function and application in the cooling system

The water pipe in the Mercedes ML W164 operates in the circuit between cooling system components, ensuring controlled coolant flow. A properly selected water pipe:

• maintains the tightness of connections between cooling system components,
• ensures the correct flow cross-section, which limits pressure drops,
• stabilizes the fluid routing path, minimizing the risk of abrasion and vibration.

By maintaining the original geometry of the pipe, the cooling system operates predictably, and the engine temperature remains within the intended operating range.

Benefits of using an original Mercedes pipe

Using a water pipe from the same design line as the vehicle's factory equipment translates into a number of practical advantages:

• Factory fitment – correct length, connection diameters, and shape facilitate installation at original mounting points.
• Stable cooling system operation – the pipe is designed for specific pressure and temperature conditions in the given model.
• Consistency with other system elements – compatibility with the standard engine bay architecture in the Mercedes ML W164.

This solution reduces the risk of leaks, installation stress, and collisions with other components in the engine bay.

Product characteristics and condition

The offered pipe belongs to the group of cooling system consumables that are subject to natural wear during vehicle use. The used version allows for an economical replacement while maintaining a design consistent with the vehicle manufacturer's specifications. This is a particularly advantageous solution for servicing cars where it is important to maintain the original technical configuration without having to resort to replacements with uncertain parameters.

Selection by numbers and vehicle compatibility

When selecting a water pipe for the Mercedes ML W164, it is crucial to compare the OEM part number and available interchangeable numbers with the vehicle documentation or the existing component. This verification method minimizes the risk of purchasing an incompatible component and facilitates subsequent installation. In case of doubt, it is worth comparing the markings with the manufacturer's catalog or specialized parts selection software.

If you want to deepen your knowledge about cooling system operation, symptoms of overheating, and the impact of individual components on engine longevity, check out our practical guide: Engine cooling system – overheating, repair, and used radiators.

Additionally, when shopping online, a guide describing how to verify component compatibility using manufacturer markings and catalog numbers may be helpful: buying parts by OEM numbers without the risk of mistakes.

Expansion and service of the Mercedes cooling system

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other elements from the same group, such as additional lines, flexible hoses, or pipes carrying coolant, check the available parts in the Mercedes cooling system hoses and pipes category.