Coolant Hose BMW X3 F25 X4 F26 Diesel Radiator Water Pipe Line N57N 8570040

BMW X3 F25 X4 F26 Coolant Hose N57N is an original cooling system component designed for BMW diesel engines, specifically for X3 F25 and X4 F26 models. With factory-fit precision, it ensures proper coolant flow and stable operation of the Diesel engine. This is a practical solution for users looking to restore their cooling system's efficiency while adhering to manufacturer specifications.

Specifications and technical data

• SKU: 8570040
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8570040
• Substitutable numbers: 17128570040, 8570040, BG
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The presented hose belongs to the Cooling System Hoses and Lines group and is responsible for transporting coolant between system components in the N57N engine. A correctly selected hose is crucial for maintaining the engine's proper operating temperature, especially in modern Diesel engines that operate under significant thermal load.

Using a component with the appropriate shape and diameter minimizes the risk of leaks, kinks, and localized overheating, which translates to stable engine operation and reduces the risk of costly failures.

Compatibility with BMW X3 F25 and X4 F26

The N57N Coolant Hose has been designed with the engine bay architecture of BMW X3 F25 and BMW X4 F26 models with a diesel engine in mind. Proper routing of the hose relative to other components (engine accessories, body parts, electrical harnesses) facilitates installation and reduces the risk of rubbing or unwanted stress during operation.

By maintaining the original hose geometry, it is possible to ensure correct coolant circulation throughout the system, which is important for both calm driving and conditions of higher thermal load typical for Diesel engines.

Performance Characteristics and Benefits of Use

Choosing an original coolant hose for the BMW X3 F25 / X4 F26 allows for consistency with the factory cooling system design. The most important benefits include:

• factory fit for the N57N engine and the cooling system in the given body model,
• appropriately selected hose diameter and shape, promoting stable fluid flow,
• maintenance of the hose routing in the engine bay as intended by the manufacturer,
• possibility of use as part of a repair while maintaining cooling system operating parameters.

A component from this group is particularly important in diesel engines, where maintaining the correct operating temperature affects engine durability, running culture, and fuel consumption.

Product Condition and Service Application

The offered coolant hose is a used part intended for reinstallation in a vehicle where restoring the cooling system's efficiency while maintaining original BMW specifications is required. This type of component is suitable for both standard replacement of a worn hose and for broader service work involving the cooling system in a Diesel engine.

It is always advisable to verify the correct part selection based on vehicle data and the OEM part number to avoid compatibility issues and ensure proper installation.

BMW Cooling System Expansion – Related Parts

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as additional fluid lines, flexible return hoses, or sections connecting the radiator to the engine, check the available parts in the BMW Cooling System Hoses and Lines category.

To better understand the impact of efficient hoses and lines on the engine's thermal safety, it is worth reading the guide on our blog: Engine Cooling System – Overheating, Repair, and Used Radiators. There you will find practical tips on diagnosing overheating and the importance of proper coolant circulation in BMW cars and other makes.