Mercedes W205 M274 Petrol Coolant Water Radiator Hose Right O/S Side A2055013991

Mercedes W205 M274 Petrol Coolant Water Radiator Hose Right O/S Side is an original cooling system component from the Lines, hoses and pipes group, designed for installation on the right side of the engine bay. Engineered for M274 petrol engines, it ensures stable coolant flow and supports safe engine operating conditions during daily use.

Specifications and technical data

• SKU: A2055013991
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055013991
• Substitutable numbers: A2055013991, A 205 501 39 91
• Location on the vehicle: Right
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented coolant hose is a component of the petrol engine cooling system, responsible for the directional flow of the operating fluid on the right side of the vehicle. Its properly shaped cross-section and matched connection ports allow for secure seating in factory mounting points, which reduces the risk of vibrations and leaks during engine operation.

Proper coolant routing has a direct impact on:

• maintaining a stable operating temperature of the petrol engine,
• even heat dissipation from critical zones,
• reducing thermal stress on other components in the engine bay.

Compatibility with the M274 unit and petrol fuel

The hose has been designed for the M274 petrol engine, which means it is matched to the characteristic layout of the ports, the arrangement of accessories, and the geometry of the engine bay in Mercedes W205 models. As a result, the component works with the factory cooling system without the need for modifications, maintaining the flow parameters specified by the manufacturer.

Such structural matching translates into:

• easier installation in original mounting points,
• correct routing of the hose in relation to other sub-assemblies,
• minimizing the risk of collision with moving or hot elements.

Installation characteristics – right side of the vehicle

The coolant hose is intended for installation on the right side of the vehicle, which is important both when selecting parts and when planning service work. Clearly defined placement facilitates the identification of the correct component in the engine bay and reduces the risk of errors during replacement.

During installation, it is worth paying attention to:

• correct positioning of the hose in relation to factory brackets and clamps,
• precise seating on the cooling system ports,
• checking for leaks after the engine has first warmed up to operating temperature.

Used condition and benefits of choosing an original part

The item is offered in used condition, which provides a reasonable compromise between repair costs and maintaining the manufacturer's original specifications. Choosing an original coolant hose from disassembly allows you to maintain the integrity of the cooling system while reducing expenses compared to a new part.

Before installation, a standard visual inspection of the hose is recommended, including an assessment of the surface, material flexibility, and the condition of the connection ends to ensure trouble-free operation after replacement.

System expansion – other Mercedes lines, hoses and pipes

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 rigid pipes carrying fluid, check the available parts in the Mercedes lines, hoses and pipes category.

For drivers interested in a wider use of parts from disassembly, including body elements and accessories, useful information on the quality of used components and how to select them can be found in the article: Replacing body parts with used ones – can body parts from disassembly look like new?.