BMW 1 3 Series E87 E90 M47N2 Cooling radiator water hose pipe Diesel 7789721

BMW 1 3 Series E87 E90 M47N2 Cooling radiator water hose pipe is an original cooling system component designed for BMW M47N2 diesel engines. Thanks to its factory-spec fitment, it ensures stable coolant flow, supporting the safe operation of the power unit. It is a practical solution for users looking for a proven water hose instead of random aftermarket replacements.

Specifications and technical data

• SKU: 7789721
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 17127789721
• Substitutable numbers: 17127789721
• Fuel type: Diesel
• Category: Caps

Purpose and function in the cooling system

The presented water hose has been designed to work with the M47N2 diesel engine used in BMW 1 Series E87 and 3 Series E90 and E91 models. It is responsible for transporting coolant between system components, which directly affects the maintenance of a stable operating temperature for the engine. A correctly selected hose reduces the risk of overheating, leaks, and cooling performance drops.

Thanks to a design consistent with factory solutions, the hose maintains the correct routing geometry in the engine bay, which facilitates installation and minimizes material stress during operation.

Benefits of using an original water hose

Using a water hose dedicated to a specific power unit provides a number of practical benefits:

• reliable fitment to the connectors and mounts in the M47N2 engine,
• maintenance of proper coolant circulation in the diesel engine,
• reduced risk of leaks due to the correct profile and diameter,
• easier installation compared to universal replacements.

By choosing an original BMW water hose, you maintain the consistency of the cooling system with the vehicle's factory specifications, which promotes stable engine operation and predictable behavior under various load conditions.

Product characteristics and condition

The item comes from the Covers group, but in practice, it serves as a functional water hose in the cooling system. The product is used, which means it was previously operated in a vehicle, but it can still perform its function after proper installation. This is a particularly attractive solution for users looking for a technically sound component at a reasonable price compared to new parts.

Before installation, it is recommended to perform a standard check of tightness, the condition of the connectors, and the surfaces interacting with the clamps to ensure trouble-free operation of the system after replacement.

Installation and maintenance tips

When replacing a water hose in a diesel engine, it is worth paying attention to a few technical aspects:

• checking the condition of other hoses and cooling system components,
• using appropriate clamps with the correct clamping force,
• bleeding the system after filling it with fresh coolant,
• checking for leaks after the first heating and cooling cycles of the engine.

Such an approach allows you to fully utilize the potential of the original water hose and reduce the risk of needing further cooling system interventions in the near future.

Further upgrades within the system

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 covers, trims, or additional moldings, check the available parts in the BMW Covers category.

For larger service tasks, including those involving the drivetrain, practical tips on selecting used components may be helpful – you can find them in the article Used gearbox – when is it worth it and what you need to remember, which discusses, among other things, compatibility and the cost-effectiveness of purchasing second-hand parts.

Summary

BMW 1 3 Series E87 E90 M47N2 Cooling radiator water hose pipe is a practical choice for drivers who want to restore proper coolant circulation in their diesel engine without sacrificing factory fitment. The original design, compatibility with the M47N2 unit, and the ability to integrate with the existing cooling system make it a technically safe and functional solution for daily use.