BMW E82 E90 E91 N47 Cooling Radiator Water Pipe Hose Diesel 7797257

BMW E82 E90 E91 N47 Cooling Radiator Water Pipe Hose is an original cooling system component designed for BMW E-series diesel engines with the N47 unit. Thanks to its factory geometry and precisely selected diameter, it ensures stable coolant flow and proper integration with other system components. This is a practical solution for users who want to maintain consistency with the factory specifications of their vehicle.

Specifications and technical data

• SKU: 7797257
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797257
• Substitutable numbers: 17127797257, 7797257, AS
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented water pipe is a component from the Lines, hoses, and pipes category, responsible for transporting coolant between cooling system components in BMW vehicles with the N47 diesel engine. Proper fluid routing is crucial for maintaining a stable operating temperature of the engine, which translates into its durability and correct performance under various load conditions.

A properly selected water pipe minimizes the risk of local overheating, leaks, and pressure drops in the system, which is particularly important in modern diesel units operating under higher thermal loads.

Compatibility with the N47 diesel engine

The component has been designed to work with the cooling system in BMW cars equipped with an N47 family diesel engine. This means it is matched in terms of:

• connection geometry to factory cooling system ports,
• internal pipe cross-section for required fluid flow rates,
• resistance to temperature and pressure typical for diesel units.

As a result, the pipe can be used as a replacement for a worn or leaking component without the need to modify other system parts.

Characteristics of the used component

The offered pipe comes from dismantling and is a used component, which allows for an economical replacement while maintaining original BMW specifications. This type of part is particularly attractive in situations where the priority is:

• maintaining factory fitment for a specific engine configuration,
• reducing repair costs while using an OEM component,
• avoiding compatibility issues typical of generic aftermarket replacements.

A water pipe of this type is suitable both for standard replacement of a worn part and for more extensive service work within the cooling system.

Benefits of using an original BMW pipe

Using an original water pipe in a BMW cooling system with an N47 diesel engine provides a number of practical benefits:

• Factory fitment – the pipe is designed for the specific architecture of the engine bay, which facilitates installation and eliminates stresses resulting from incorrect length or shape.
• Stable operating parameters – the properly selected diameter and shape translate into predictable coolant flow.
• Consistency with other system elements – the pipe works with factory clamps, ports, and housings, which reduces the risk of leaks.

Such a solution is particularly beneficial for users who want to keep the vehicle in a configuration close to the factory state, without experimenting with random replacements.

Installation and maintenance tips

When replacing a water pipe in the cooling system, it is worth paying attention to a few technical aspects:

• checking the condition of ports and hose clamps before installation,
• correct positioning of the pipe according to factory routing to avoid chafing,
• proper bleeding of the cooling system after completing the work.

This approach allows you to fully utilize the potential of the offered component and reduce the risk of subsequent leaks or cooling performance drops.

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 coolant lines, flexible hoses, or rigid cooling pipes, check the available parts in the BMW lines, hoses, and pipes category.

For better planning of service work on the cooling system and components related to cabin heating, it is worth familiarizing yourself with practical tips regarding the selection and maintenance of components, which you will find in the article Air conditioning and heating – part selection and maintenance for year-round comfort.