BMW X3 F25 X4 F26 Coolant Hose Diesel Radiator Water Pipe Line N57N N57Z 8571346

BMW X3 F25 X4 F26 Water Hose Pipe Coolant Hose N57N N57Z is a cooling system component designed for BMW diesel engine vehicles. It ensures a stable flow of coolant, which is crucial for the safe operation of the Diesel engine unit under demanding road conditions.

Specifications and technical data

• SKU: 8571346
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8571346
• Substitutable numbers: 8571346, 17128571346
• Fuel type: Diesel
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The presented BMW X3 F25 / X4 F26 cooling system water hose operates within the coolant circuit of N57N and N57Z engines. Its task is to maintain proper medium flow between system components, supporting the stable operating temperature of the engine unit and reducing the risk of overheating during city driving, highway driving, and under load.

This part belongs to the Cooling System Hoses and Pipes category, making it structurally adapted to operate in high-temperature and variable pressure environments typical for BMW diesel engines.

Benefits of Using an Original BMW Hose

Using a water hose dedicated to specific BMW X3 F25 and X4 F26 models with diesel engines offers a range of practical benefits:

• Factory Geometric Fit – the correct shape and connector diameters facilitate installation into the existing cooling system without the need for modifications.
• Stable Coolant Flow – the appropriately selected inner diameter supports proper circulation, helping to maintain optimal engine operating temperature.
• Compatibility with Diesel Engines – the hose is adapted to the operating conditions of Diesel units, including prolonged thermal load.
• Consistency with the Factory Cooling System – maintaining the manufacturer's original design reduces the risk of leaks and operational problems.

Characteristics of a Used Part

The offered water hose comes from the group of used BMW cooling system hoses. These types of components are often chosen as an economical alternative to new parts, especially for complex cooling systems in modern diesel engines.

In practice, this means the possibility of restoring the cooling system's efficiency while maintaining reasonable service costs, while using a component that is compliant with the vehicle manufacturer's original specifications.

Application in Service and Diagnostics

Replacement of the water hose is recommended in situations where:

• signs of leaks appear around the connectors or on the hose surface,
• cracks, abrasions, or deformations of the material are present,
• problems with maintaining pressure in the cooling system occur, manifesting as a drop in fluid level or engine overheating.

Selecting a hose dedicated to BMW X3 F25 and X4 F26 with a diesel engine facilitates service work, reduces installation time, and minimizes the risk of repeated intervention in the cooling system after repair.

More Hoses and Knowledge about the Cooling System

If you need other BMW cooling system hoses and pipes for your car, check out our dedicated offer: BMW cooling system hoses and pipes. You will find a wide selection of components tailored to various models and engine configurations.

To better understand how to maintain the efficiency of the cooling system in high temperatures and when it is worth considering used components, consult the guide: Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings. This is a practical addition to your knowledge when planning service for your BMW.