Mercedes R172 M274 Engine Coolant Left N/S Cooler Hose Pipe Line A1725017282

Mercedes R172 M274 Engine Coolant Left N/S Cooler Hose Pipe Line is an original cooling system component designed for petrol engines. Thanks to its precise fitment to the specific vehicle configuration, it ensures a stable flow of coolant, supporting a safe engine operating temperature. This is a practical solution for users who want to restore the proper efficiency of the cooling system while maintaining factory performance characteristics.

Specifications and technical data

• SKU: A1725017282
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1725017282
• Substitutable numbers: A1725017282, A 172 501 72 82
• Location on the vehicle: Left
• Fuel type: Petrol
• Category: Coolant Hoses

Function and role in the cooling system

The hose belongs to the Cooling system hoses and pipes group and is responsible for transporting coolant between components in the front part of the vehicle. Its position on the left side translates into specific routing within the engine bay, which is important for proper alignment with the radiator, fan, and other components.

In the case of petrol engines, maintaining a stable operating temperature is particularly important, which is why a properly selected flexible hose reduces the risk of local overheating, leaks, and uncontrolled vibrations resulting from engine operation and pressure changes in the system.

Construction and vehicle fitment

The flexible hose has been designed specifically for the M274 engine architecture in the R172 body, taking into account the geometry of the engine bay and mounting points. The shape, connection diameters, and material flexibility are selected to:

• ensure a tight connection with radiator ports and engine components,
• minimize stresses resulting from the operation of the power unit,
• maintain a safe distance from hot and moving accessory parts.

Such fitment reduces the risk of chafing, cracking, and improper hose positioning, which has a direct impact on the durability of the entire cooling system.

Application in petrol engines

The component is intended for use with petrol engines, where the heating and heat dissipation characteristics require efficient coolant circulation. The correct flexible hose helps maintain:

• stable engine operating temperature under various load conditions,
• proper pressure in the cooling circuit,
• adequate fluid circulation in the front area of the vehicle.

As a result, the engine can operate within the parameters specified by the manufacturer, which promotes its longevity and stable performance.

Characteristics of the used component

The hose comes from an operated vehicle, which means it is a used part, but still functional for further service in the cooling system. This type of component is a reasonable choice for users who are looking for factory fitment and want to maintain the original assembly specifications while optimizing repair costs.

Before installation, a standard visual inspection and leak verification after installation are recommended to confirm proper interaction with the remaining system components.

Technical support and related materials

To better understand the impact of cooling hoses on engine durability and the symptoms of overheating, it is worth checking out the guide describing practical aspects of cooling system diagnostics and repair – it is discussed in detail in the article Engine cooling system – overheating, repair, and used radiators, which shows how to properly approach the service of this area.

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 additional lines, hoses, or flexible connection sections, check the available parts in the Mercedes cooling system hoses and pipes category.