BMW 1 Series E87 Petrol N45 N46 Cooling Coolant Thermostat Water Hose Pipe

BMW 1 Series E87 Petrol N45 N46 Cooling Coolant Thermostat Water Hose Pipe is an original cooling system component designed for BMW N45 and N46 petrol engines in the E87 model. As part of the Clamps and mounting parts group, it ensures stable routing and a leak-proof connection for the coolant circuit, which translates into safe engine operation. Using an OEM component is a sensible choice for drivers looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: 7548241
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 17127548241
• Substitutable numbers: 17127548241, 7548241, 17127525027, 7548236, 106172
• Fuel type: Petrol
• Category: Clamps & Hardware

Purpose and function in the cooling system

The water hose in BMW N45/N46 petrol engines is responsible for the reliable routing of coolant between system components, such as the engine block, radiator, or intermediate connectors. A properly selected water pipe:

• maintains a stable flow of coolant under pressure,
• minimizes the risk of leaks at the connections,
• supports the maintenance of the optimal operating temperature of the engine,
• reduces the risk of engine overheating during intensive use.

Thanks to its fitment for specific generations of BMW petrol engines, the hose works with factory mounts and clamps, which facilitates installation and maintenance.

Construction, fitment, and installation

As an OEM component, the water hose for the BMW E87 has been designed for precise fitment with original connectors and brackets in the engine bay. The properly shaped geometry of the hose:

• ensures correct routing in the space between engine accessories,
• limits stress on joints and clamps,
• reduces the risk of rubbing against adjacent components.

Such fitment promotes quick installation and allows for maintaining the factory routing of hoses in the engine bay, which is important for both durability and subsequent service.

Benefits of using an original BMW hose

Using an original water hose in the cooling system of a BMW E87 with a petrol engine brings a number of practical benefits:

• Cooling system compatibility – the hose is designed for specific N45/N46 units, which limits the risk of leaks resulting from poor fitment.
• Stable operating parameters – the correct cross-section and shape support even coolant flow, which helps maintain a predictable engine operating temperature.
• Hassle-free installation – the ability to use factory clamps and brackets shortens replacement time and facilitates the mechanic's work.
• Economical repair – a used OEM component allows for lower service costs while maintaining the original technical specifications.

Using used parts in BMW service

In the case of the cooling system in a BMW, many users decide on used OEM components to combine reasonable costs with the preservation of factory parameters. This applies not only to water hoses but also to other components within the engine. In the context of servicing BMW units, it is worth familiarizing yourself with practical tips regarding the selection and replacement of original parts – this is discussed in more detail in the article BMW N47 timing chain – typical failure and repair using original BMW parts, which shows why original components, even used ones, are often the best choice.

Repair expansion – BMW Clamps and mounting parts

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 brackets, clamps, or hose mounts, check out the available parts in the BMW Clamps and mounting parts category.

Summary

BMW 1 Series E87 Petrol N45 N46 Cooling Coolant Thermostat Water Hose Pipe is a used, original cooling system component designed for BMW petrol engines, which allows for restoring proper coolant circulation while maintaining factory fitment. Choosing such a part is a practical solution for users who value technical consistency, predictable cooling system behavior, and a favorable cost-to-quality ratio when servicing their car.