BMW E81 E82 E87 Heater Water Cooling Coolant Pipe Hose Line 7548239

BMW E81 E82 E87 Heater Water Cooling Coolant Pipe Hose Line is an original component from the Cooling system pipes and hoses group, designed for use in compact BMW 1 Series models. Engineered as part of the factory cooling and heater water circulation system, it ensures a stable connection between components, which translates into predictable engine and cabin heating performance.

Specifications and technical data

• SKU: 7548239
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7548239
• Substitutable numbers: 7548239, 17127548239, 7525028, 17127525028
• Category: Coolant Hoses

Purpose and function in the cooling system

The heater water cooling coolant pipe hose line in the BMW E81, E82, and E87 is responsible for transporting coolant between system components that support the heater circuit. A correctly selected and leak-free hose:

• stabilizes coolant flow in the heating circuit,
• reduces the risk of localized engine overheating,
• supports the maintenance of the proper engine operating temperature,
• ensures efficient operation of the vehicle's interior heating.

Thanks to a design consistent with BMW's factory specifications, this component maintains the correct routing geometry in the engine bay, which facilitates installation and minimizes stress during operation.

Original origin and replacement numbers

The offered hose comes from the BMW line, which means compliance with the manufacturer's factory design standards. The part has a dedicated OEM number and assigned interchangeable numbers, allowing it to be precisely matched to a specific vehicle configuration in BMW catalogs and professional parts selection systems.

The presence of reference numbers facilitates compatibility verification with specific engine versions and model years of the BMW 1 Series, and allows mechanics and diagnosticians to quickly confirm the correct component selection relative to the vehicle's original equipment.

Benefits of using an original BMW hose

Using a heater water hose sourced from BMW brings a number of practical operational benefits:

• Factory geometric fit – the hose is designed for specific E81, E82, and E87 models, which reduces the risk of collision with other components in the engine bay.
• Consistency with the cooling system – the original diameter and flow characteristics are maintained, which promotes stable operation of the entire system.
• Easier diagnostics and service – thanks to clear part marking, a mechanic can quickly verify correct installation and compliance with BMW service documentation.
• Seamless integration with other pipes and hoses – the component fits into the existing system without the need for modifications or the use of additional adapters.

Condition, service application, and parts selection

The component comes from the secondary market, making it an attractive solution for servicing older BMW 1 Series vehicles, where a reasonable balance between repair cost and maintaining original specifications is important. This type of hose is particularly suitable in situations where:

• the existing hose shows signs of wear, cracks, or leaks,
• it is necessary to replace several cooling system components in one service cycle,
• the priority is to maintain the original architecture of the BMW cooling system.

To select the hose for a specific vehicle, it is worth using the OEM part number or interchangeable numbers in the BMW catalog, which will avoid errors and ensure full compliance with the vehicle's factory configuration.

Cooling system service expansion and additional materials

When working on cooling system pipes and hoses, it is worth analyzing the condition of other components – especially around the heater core, connectors, and connections to the engine block. A good practice is to simultaneously check the tightness of the entire system, venting, and the quality of the coolant used to avoid the return of engine overheating or underheating problems.

If you want to better understand the impact of pipes, hoses, and radiators on engine durability and the symptoms of overheating, read the article: Engine cooling system – overheating, repair, and used radiators.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional pipes, return hoses, or sections connecting to the radiator, check the available parts in the BMW cooling system pipes and hoses category.