BMW 1 3 Series F20 F21 F30 F31 N47N Engine Water Coolant Pipe Hose 7811133

BMW F20 F21 F30 F31 N47N Water Hose Pipe Tube is an original cooling system component from the Hoses, Pipes and Tubes group, designed for use in popular BMW models with the N47N engine. The product ensures proper coolant flow, which translates to stable engine operating temperature and safe operating conditions.

Specifications and technical data

• SKU: 7811133
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811133
• Substitutable numbers: 17127811133, 7811133, EM, 24008638272, 8638272, 24008623594, 8623594, 24008614196, 8614196
• Category: Hoses, Lines & Pipes

Purpose and Function in the Cooling System

The offered water hose is a factory cooling system component in BMW F-series vehicles, responsible for directing coolant between engine and cooling system components. A correctly selected water hose minimizes the risk of overheating, leaks, and reduced cooling efficiency, which directly impacts engine durability.

Thanks to its construction conforming to manufacturer standards, correct diameters, shape, and mounting points are maintained, facilitating installation and preserving the original cooling system geometry.

Construction, Fitment, and Installation

This hose belongs to the group of components molded for a specific engine-radiator system, therefore its shape is optimized for the engine bay of BMW F20, F21, F30, and F31 models with the N47N unit. Appropriately selected straight and bent sections of the hose reduce stress, minimize the risk of abrasion, and facilitate routing near other components.

The part is prepared for installation in place of the factory hose, maintaining original mounting points and sealing methods. In practice, this means standard clamps and connectors can be used, without the need for modifications or fitting universal alternatives.

Benefits of Using an Original BMW Hose

Using a water hose from the same design line as factory BMW components allows for the consistency of the entire cooling system. The correct matching of length and diameter translates to:

• stable coolant flow across the full range of engine loads,
• reduced risk of leaks at connections,
• easier installation without the need for system modifications,
• maintenance of the factory routing logic for hoses in the engine bay.

For users seeking a technically matched solution for specific BMW models, such a hose is a safe choice, allowing for the restoration of correct cooling system operation after a failure or during scheduled maintenance.

Characteristics of a Used Product

The item is offered as a used part, which means it comes from a dismantled vehicle and has been verified for its suitability for further use. For water hoses, maintaining seal integrity, material flexibility, and the absence of mechanical damage in the working area are particularly important – these aspects are crucial when selecting a component.

For many users, choosing a used original hose represents a reasonable compromise between cost and maintaining factory fit and compatibility with other cooling system components.

Cooling System Expansion and Selection of Other Components

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 water hoses, flexible radiator hoses, or rigid coolant pipes, check the available parts in the BMW Hoses, Pipes and Tubes category.

When planning more extensive service work, it is also worth familiarizing yourself with tips on selecting used components in other vehicle systems – practical advice, examples, and discussion of design differences can be found in the article Stock vs. Sport Suspension – Construction Differences and Is It Worth Buying Used Suspension Parts?.