Mercedes W164 Water Pipe Engine Cooling Coolant Hose Line A1645004375

Mercedes W164 Water Pipe Engine Cooling Coolant Hose Line is a component from the Cooling system hoses and pipes group, designed for operation in the coolant circuit of Mercedes W164 series vehicles. It enables stable fluid routing between the radiator and other system components, supporting safe heat dissipation from the engine and maintaining the correct operating temperature of the power unit.

Specifications and technical data

• SKU: A1645004375
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645004375
• Substitutable numbers: A1645004375, A 164 500 43 75
• Category: Coolant Hoses

Purpose and function in the cooling system

The described hose is a part of the cooling system responsible for transporting coolant between the radiator and other installation elements. A properly selected hose ensures:

• stable coolant flow under typical operating loads,
• maintenance of connection tightness within the water radiator area,
• proper compatibility with connectors and fittings designed for the W164 series.

By maintaining the correct cross-section and geometry of the hose, the cooling system can effectively dissipate heat from the engine, which reduces the risk of overheating and supports long-term, repeatable operation of the power unit.

Technical characteristics and fitment

The hose has been designed as a component dedicated to a specific Mercedes platform, which translates into precise fitment to factory mounts and compatibility with the original water radiator. The hose design accounts for:

• a properly shaped routing path in the engine compartment,
• adaptation to operation within the typical temperature range of the cooling system,
• the possibility of installation in place of the factory element without the need for modifications.

Such fitment facilitates quick installation and reduces the risk of stress on the connections, which is important for the long-term tightness of the entire system.

Benefits of using an original Mercedes hose

Using a hose dedicated to the Mercedes W164 allows for maintaining consistency with the factory cooling system concept. Key advantages include:

• compliance with Mercedes factory standards regarding geometry and hose routing,
• easier diagnostics and service thanks to maintaining the original installation layout,
• reduction of leakage risks resulting from the use of universal components.

An element from this group is particularly important in vehicles operated in varied temperature conditions, where the stability of the cooling system affects engine durability and user comfort.

Product condition and service application

The offered hose comes from dismantling and is a used component, which is an attractive solution for users looking for a compromise between repair costs and maintaining the manufacturer's original specifications. This type of component is suitable for:

• standard replacement of a worn or leaking water radiator hose,
• post-accident repairs in the front part of the vehicle,
• preventive cooling system service when it is necessary to replace several elements at once.

Thanks to maintaining the original design, the hose can be integrated into the existing system without interfering with other components, which facilitates workshop work and shortens vehicle downtime.

Cooling system expansion and additional materials

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

To better understand the impact of an efficient cooling system on vehicle operation in high temperatures and the potential savings when using dismantled components, it is worth reading the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which discusses the practical aspects of selecting and operating cooling components.