Coolant Hose Mercedes X253 Petrol M274 Heat Exchanger Water Line A2742030182

Coolant Hose Mercedes X253 Petrol M274 Heat Exchanger Water Line is a cooling system component designed for the precise routing of coolant between the engine and the heat exchanger. By being tailored to the M274 petrol unit in the X253 body, it ensures stable thermal operating conditions for the engine and supports the maintenance of proper efficiency for the entire cooling system.

Specifications and technical data

• SKU: A2742030182
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742030182
• Substitutable numbers: A2742030182, A 274 203 01 82
• Fuel type: Petrol
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose belongs to the Cooling system hoses and lines group, responsible for transporting coolant within the engine and its accessories. In this case, its task is to manage the circuit between the engine block and the heat exchanger, which has a direct impact on:

• maintaining a stable operating temperature of the petrol engine,
• efficient dissipation of excess heat from the heat exchanger area,
• reducing the risk of overheating in both urban and highway driving conditions.

Thanks to its dedicated shape and diameter, the hose ensures proper coolant flow, which translates into predictable operation of the M274 unit in the X253 model.

Compatibility with the M274 petrol unit

The hose has been designed to work with a petrol engine, which means it is matched to the thermal characteristics of units powered by petrol fuel. The appropriate geometry of the connectors and the routing of the hose allow for:

• collision-free installation in the X253 engine bay,
• proper positioning relative to the heat exchanger and other accessory components,
• preservation of the factory coolant circuit design.

Such a fit reduces mechanical stress and minimizes the risk of leaks resulting from improper installation or the use of universal-shaped components.

Characteristics of the used OEM component

The offered hose is a part originating from a Mercedes vehicle, which means it retains factory geometry, connection diameters, and compatibility with original cooling system accessories. A used component of this type is a solution that allows you to:

• maintain compliance with factory design specifications,
• reduce repair costs while maintaining original specifications,
• avoid fitment problems typical of universal-profile replacements.

This is a practical choice for cooling system maintenance when the priority is combining functionality with the control of operating costs.

The importance of the correct hose in the cooling circuit

A functional heat exchanger water hose has a direct impact on the thermal safety of the engine. Its proper operation supports:

• stabilization of coolant temperature in the heat exchanger area,
• reduction of thermal loads on components interacting with the engine,
• maintenance of appropriate operating parameters in high ambient temperature conditions.

Replacing a worn or leaking hose with the correct component dedicated to the X253 with an M274 engine helps reduce the risk of failures, such as engine overheating or coolant loss.

Technical support and additional materials

During the summer period, the load on the cooling system increases significantly, so it is worth checking out the guide describing the impact of high temperatures on the cooling circuit and ways to save money when selecting components – detailed information can be found in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as return lines, supply hoses, or connecting sections to the radiator, check the available parts in the Mercedes cooling system hoses and lines category.