Mercedes W204 Water Hose Radiator Coolant Cooling Pipe Line A2045014082

The Mercedes W204 Coolant Hose is a cooling system component designed specifically for models in this series. It is responsible for the stable flow of coolant between the radiator and other components, supporting a safe engine operating temperature and reducing the risk of overheating. Thanks to its construction in line with factory Mercedes standards, the hose ensures precise geometric fit to the W204 cooling system.

Specifications and technical data

• SKU: A2045014082
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045014082
• Substitutable numbers: A2045014082, A 204 501 40 82
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The radiator coolant hose in a Mercedes W204 operates within the coolant circuit, connecting key system elements. Its task is to maintain a sealed, stable flow of the cooling medium under variable pressure and temperature, which translates to the proper functioning of the powertrain and other components cooperating with the cooling system.

A properly selected hose from the Cooling System Hoses and Pipes group minimizes the risk of leaks, pressure drops, and localized overheating, which can lead to damage of seals, the cylinder head, or engine accessories.

Benefits of Using an Original Mercedes Hose

Using a coolant hose dedicated to the W204 allows for the preservation of factory flow characteristics and routing geometry within the engine bay. In practice, this means:

• secure fit to the cooling system's spigots and mounts,
• correct hose routing while maintaining required bend radii,
• reduction of material stress and the "working" phenomenon of the hose during temperature changes,
• stable cooperation with other cooling system components.

For the user, this translates to more predictable cooling system operation and a lower risk of failures resulting from incorrect hose selection or installation.

Product Characteristics and Condition

The offered coolant hose for the Mercedes W204 is from the brand's factory components group, which promotes maintaining the structural integrity of the entire system. The product is used, which means that before installation, it is advisable to inspect its surface for any signs of wear, such as localized hardening or minor deformations, in accordance with good service practice.

Choosing a used hose from this series is a cost-effective solution while maintaining original geometry and compatibility with the factory Mercedes W204 cooling system.

Technical Support and Cooling System Component Selection

When working on the cooling system, it is worth viewing the entire circuit as a cohesive system. Information on typical overheating symptoms, diagnostics, and the impact of individual components on powertrain durability can be found in the article: Engine Cooling System – Overheating, Repair, and Used Radiators. This is a practical addition to your knowledge when planning the replacement of hoses, radiators, or other coolant circuit components.

If you want to better understand the differences between original, aftermarket, and used parts and make informed service strategy choices regarding cost and fit, the guide will be helpful: Original, Aftermarket, or Used – Which Car Parts Are Most Cost-Effective?. It will help you assess when choosing a used coolant hose is technically justified.

Expanding the Mercedes Cooling System

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other components from the same group, such as additional hoses, return hoses, or connections to the radiator, check the available parts in the category Mercedes Cooling System Hoses and Pipes.

This approach allows for refreshing several key sections of the coolant circuit simultaneously, which reduces the risk of subsequent leaks and facilitates the maintenance of stable engine operating parameters in the long term.