BMW 1 Series E87 116i 118i 120i Petrol N45 N46 Cooling Radiator Water Hose Pipe

BMW 1 Series E87 116i 118i 120i Petrol N45 N46 Cooling Radiator Water Hose Pipe is an original cooling system component designed for N45 and N46 petrol engines in the BMW E87 model. Thanks to its factory-spec geometry and connection diameters, it ensures proper coolant flow between engine components, supporting stable operating temperatures for the powertrain. Using this OEM component is a sensible choice for cooling system maintenance when you prioritize a fit consistent with the manufacturer's specifications.

Specifications and technical data

• SKU: 7548213
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7525026
• Substitutable numbers: 17127548213, 7548213, 17127525026, 7525026, 17127548242
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and compatibility

The hose has been designed for use in compact BMW 1 Series E87 models with N45 and N46 petrol engines. The hose construction is tailored to the cooling systems of these units, allowing for proper fluid circulation while minimizing the risk of overheating and local pressure drops. Using a dedicated hose instead of universal parts reduces issues with leaks, material stress, and collisions with other components in the engine bay.

Technical and functional characteristics

As a part from the Hoses, pipes and lines category, this water hose is responsible for transporting coolant between specific points in the system. The carefully selected material flexibility allows for the compensation of engine vibrations and temperature changes while maintaining a stable flow cross-section. The shape of the hose is optimized for routing within the BMW E87 engine bay, ensuring it does not rub against adjacent elements and maintains safe distances from heat sources.

In practice, using the original water hose results in:

• a secure fit to cooling system connectors and clamps,
• stable operation of the petrol engine within its working temperature range,
• reduced risk of coolant leaks when installed correctly.

Product condition and benefits of choosing a used part

The offered hose is a salvaged part and is classified as a used part. For many users, this represents a beneficial compromise between repair costs and maintaining original BMW specifications. For components such as water hoses, using an OEM part from the secondary market often ensures a better fit than cheap aftermarket replacements with uncertain geometry. Before installation, a standard visual inspection is recommended, along with checking the flexibility and surface condition in areas where hose clamps are applied.

Installation and maintenance tips

When replacing the water hose in a BMW E87 with a petrol engine, it is worth paying attention to several technical aspects:

• thoroughly cleaning the connectors of deposits and corrosion before installing the hose,
• using appropriate clamps with the correct clamping range,
• correctly positioning the hose according to the factory routing in the engine bay,
• bleeding the cooling system after refilling with fresh coolant.

This approach allows you to fully utilize the potential of the part and limits the risk of needing further cooling system intervention shortly after the repair.

Expanding your BMW cooling system service

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other items from the same group, such as additional coolant hoses, flexible return lines, or pipes connecting individual sections of the system, check out the available parts in the BMW Hoses, pipes and lines category.

Technical support and knowledge about used parts

When selecting used components for modern cars, including the BMW 1 Series, it is worth using reliable sources of information regarding compatibility and installation methods. If you are interested in the broader context of using secondary market parts, particularly in the area of electronics and advanced modules, the Global Parts guide may be helpful: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. Although it mainly concerns electronics, the principles of conscious selection and verification of components presented there also apply well to the practice of purchasing other used car parts.