Coolant Hose Mercedes W204 Petrol M274 Radiator Right O/S Water Line A2045019482

The Mercedes W204 M274 Right Radiator Coolant Hose is an original cooling system component designed for gasoline engines of this series. Developed by Mercedes, it ensures proper coolant flow on the right side of the engine bay, contributing to stable engine operating temperatures and safe vehicle operation.

Specifications and technical data

• SKU: A2045019482
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045019482
• Substitutable numbers: A2045019482, A 204 501 94 82
• Location on the vehicle: Right
• Fuel type: Petrol
• Category: Water Pumps

Purpose and Function in the Cooling System

The right-side radiator coolant hose is responsible for directing coolant between the radiator and the engine's cooling system components in gasoline engines. A correctly selected and fitted hose:

• maintains the integrity of the coolant circuit under varying pressure,
• ensures stable fluid flow at high temperatures,
• minimizes the risk of engine overheating,
• prevents leaks that could lead to engine failure.

This component is particularly crucial in gasoline engines, where precise temperature control directly impacts component durability and engine performance.

Compatibility and Fit for Mercedes W204 M274

This hose has been developed specifically for the W204 platform with the M274 engine, meaning its design aligns with the manufacturer's original specifications. As a result:

• the hose's geometry matches the original routing on the right side of the engine bay,
• mounting points and connection diameters are adapted to factory-fitted spigots,
• installation does not require modifications or adaptations of other cooling system components.

Its genuine Mercedes origin helps maintain original flow characteristics and compatibility with other cooling system components.

Technical Category: Water Pumps and Cooling System Accessories

Although this item is a hose, it functionally works in conjunction with the water pump, radiator, and other coolant circuit components. In practice, its condition directly influences:

• the efficiency of the water pump,
• uniform distribution of coolant throughout the engine,
• thermal stability under engine load.

Selecting the correct hose for this part of the system is essential for any intervention in the cooling circuit, whether replacing the radiator or servicing the water pump.

Product Characteristics and Condition

The offered hose is a used aftermarket part, allowing for an economical repair while maintaining the manufacturer's original specifications. For many users, this represents a sensible compromise between cost and quality, especially for vehicles used intensively or with higher mileage.

By retaining its factory geometry and being designed for gasoline engines, this hose can be used as a replacement for a damaged or leaking component without altering the cooling system's structure.

Assistance with Selection and Cooling System Expansion

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and require other parts from the same group, such as hoses, spigots, or components working with the coolant pump, check the available parts in the Mercedes Water Pumps category.

To better understand the relationship between the cooling system and gasoline engine power supply, as well as the importance of selecting components based on OEM numbers, we recommend reading the guide on our blog: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair. For drivers looking for ways to optimize repair costs while maintaining the quality of original parts, the article Rising Repair Costs and the Boom in Used Parts – How to Save on Car Servicing? may also be useful, discussing a practical approach to purchasing used OEM components.