BMW X3 E83 LCI Cooling System Radiator Water Hose Pipe 3.0sd M57N2 3427951

BMW X3 E83 LCI Cooling System Radiator Water Hose Pipe 3.0sd M57N2 is an original component from the Cooling system pipes and hoses group, designed to operate in demanding high-temperature and high-pressure environments. Engineered by BMW to work with the M57N2 engine, it ensures stable coolant flow and helps maintain the correct engine temperature, which translates into safe and predictable vehicle operation.

Specifications and technical data

• SKU: 3427951
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 3427951
• Substitutable numbers: 3427951, 17123427951
• Category: Coolant Hoses

Purpose and function in the cooling system

This water hose is a factory cooling system component for the BMW X3 E83 LCI with the 3.0sd M57N2 engine. It is responsible for the controlled transport of coolant between key system components, which allows for maintaining a stable engine operating temperature under both city and highway driving conditions.

The original geometry of the hose ensures:

• precise fitment to factory connectors and mounts in the engine bay,
• correct hose routing while maintaining required bending radii,
• minimization of the risk of abrasion and stress during engine operation.

Benefits of using an original BMW hose

Using a component sourced from BMW allows for maintaining the integrity of the entire cooling system in accordance with the vehicle's factory specifications. In practice, this means:

• guaranteed compatibility with other cooling system components in the 3.0sd M57N2 version,
• properly selected diameter and internal cross-section of the hose,
• preservation of the flow parameters designed by the manufacturer.

For the user, this translates into a stable engine operating temperature, reduced risk of overheating, and predictable engine behavior during long-term use.

Performance characteristics and installation

The hose is designed as a direct factory replacement part, which facilitates the mechanic's work and reduces service time. Thanks to its factory design, it is possible to:

• use standard mounting points in the engine bay,
• ensure correct positioning relative to the radiator, engine, and other hoses,
• maintain system tightness with proper installation and bleeding.

This solution is particularly beneficial when servicing high-output diesel engines, where an efficient cooling system has a direct impact on the durability of accessories and driving comfort.

Importance for the durability of the M57N2 engine

In the 3.0sd M57N2 engine, proper coolant circulation is crucial for protecting the cylinder head, seals, and turbochargers. A functional water hose helps to:

• maintain stable thermal conditions throughout the entire cooling circuit,
• reduce the risk of localized overheating in the block and cylinder head area,
• limit thermal stress on other system components.

For the owner of a BMW X3 E83 LCI, this means more predictable operation and a lower risk of costly repairs associated with engine overheating.

Cooling system expansion and related parts

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

To better understand the impact of the condition of hoses and the entire cooling circuit on engine longevity, it is worth reading the guide on our blog: Engine cooling system – overheating, repair, and used radiators. The article helps to assess when replacing hoses is justified and how to select the right components based on factory BMW solutions.