Mercedes W166 Coolant Hose Tube Pipe Line A1665004775

The Mercedes W166 Coolant Hose is an original part from the Cooling System Hoses and Pipes group, designed for precise coolant flow management in vehicles of this series. Its construction, tailored to the specific geometry of the engine bay, ensures stable mounting, proper flow, and predictable system behavior under operating conditions. This is a practical solution for users who want to restore the cooling system's correct function while adhering to manufacturer standards.

Specifications and technical data

• SKU: A1665004775
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1665004775
• Substitutable numbers: A1665004775, A 166 500 47 75
• Category: Coolant Hoses

Application and Function in the Cooling System

The coolant hose in the W166 body is responsible for the controlled transport of coolant between system components such as the radiator, engine block, and auxiliary thermal modules. The appropriately shaped pipe minimizes the risk of kinks, localized constrictions, and unwanted stress, which translates to stable pressure and uniform heat dissipation from the power unit.

Using a dedicated hose instead of universal replacements reduces the possibility of leaks, collisions with other components, and installation issues in the confined space of the engine bay.

Benefits of Using an Original Mercedes Hose

Choosing an original coolant hose for the W166 allows you to maintain system operating parameters in line with the manufacturer's specifications. Key benefits include:

• Precise geometric fit to the mounting points and routing intended in the W166 body.
• Stable maintenance of coolant flow across the full range of operating temperatures.
• Reduced risk of leaks resulting from imprecise fitment or incorrect connector diameters.
• Easier diagnostics and service – the mechanic works with a part of known specifications and predictable installation method.

This makes the hose a functional service solution for users who want to restore the cooling system's factory performance characteristics without experimenting with random aftermarket parts.

Product Characteristics and Installation

This item belongs to the Cooling System Hoses and Pipes group, meaning it is designed to operate in an environment of high temperatures, variable pressures, and contact with coolant. The hose's design accounts for routing near other components, such as engine accessories or body parts, to minimize the risk of abrasion and vibration.

During installation, it is crucial to correctly seat the hose in the factory brackets and use appropriate clamps or connectors, consistent with the solutions used in the Mercedes W166. Proper routing of the hose prevents twisting, excessive tension, and accidental contact with hot or moving parts.

Condition and Service Purpose

The product is offered as a used part, making it an attractive solution for users seeking economical cooling system repairs while maintaining original manufacturer specifications. This type of component is suitable for both replacing a damaged hose after a failure and for scheduled cooling system maintenance when signs of wear or leaks appear.

It is always advisable to verify the correct hose for a specific vehicle configuration based on catalog data and manufacturer markings to ensure full compatibility with the particular Mercedes model.

Technical Support and Additional Materials

A properly functioning cooling system is crucial for the durability of the power unit. If you want to better understand the impact of individual components – including hoses, radiators, and auxiliary modules – on engine operating temperature, it is worth reading the guide: Engine Cooling System – Overheating, Repair, and Used Radiators. The article helps correlate overheating symptoms with specific system components and facilitates service decisions.

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