BMW E81 E87 PETROL N45 N46 Cooling Radiator Water Hose Pipe 7525023

The BMW E81/E87 Petrol N45/N46 Coolant Hose is an original part from the Hoses, Pipes & Tubes category, designed for petrol engine cooling systems. Engineered by BMW, it ensures proper coolant flow and a stable connection between system components, contributing to safe and predictable engine operation. This is a practical solution for users seeking a factory fit for their 1 Series E81/E87 cars with N45 and N46 engines.

Specifications and technical data

• SKU: 7525023
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7525023
• Substitutable numbers: 17127525023, 7525023, 51717033752, 7033752, 51717896624, 7896624
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and Function in the Cooling System

This coolant hose is responsible for transporting coolant between the components of the water system in a petrol engine. Its correct shape and diameter ensure appropriate medium flow, helping to maintain stable engine operating temperatures and reduce the risk of overheating.

The part is dedicated to petrol engines, so its design takes into account the thermal and pressure characteristics typical for these types of units. This allows the hose to operate predictably in both urban conditions and during extended highway driving.

Original BMW Origin and Fitment

As a BMW product, the hose has been designed for specific models and engine configurations, ensuring a precise fit with the connectors and cooling system components. The appropriately selected geometry minimizes stress, reduces the risk of abrasion, and facilitates installation in the engine bay.

Original origin also means the hose has an assigned OEM part number and associated replacement numbers, which simplifies compatibility verification with a specific vehicle configuration. This is particularly important when selecting parts for cars that had various petrol engine variants.

Performance Characteristics and Installation

The coolant hose is a component that operates under elevated temperatures and pressure, so its design is intended for long-term use in such conditions. Using an OEM part is a good solution for users who want to maintain the factory characteristics of the cooling system at a reasonable service cost.

In practice, installation involves:

• correctly seating the hose on the cooling system connectors,
• using appropriate clamps or connectors consistent with the factory solution,
• checking for leaks after filling the system with coolant.

When replacing, it is recommended to simultaneously assess the condition of other hoses and cooling system components to avoid further service downtime.

Application in N45/N46 Petrol Engines

The presented hose is intended for petrol units, which is significant both in terms of operating temperatures and coolant flow characteristics. In N45 and N46 engines, a properly functioning cooling system is crucial for maintaining stable operation, making a functional water hose an important element of preventative maintenance.

Selecting the correct hose for a specific petrol engine variant helps avoid problems with leaks, improper hose routing, or collisions with other components in the engine bay.

Why Choose This Coolant Hose

Choosing an original BMW coolant hose for the 1 Series E81/E87 with N45/N46 petrol engines is a solution for those who expect a factory fit and predictable cooling system behavior. Using an OEM part allows for compliance with the manufacturer's design, which is important for both durability and operational safety.

If you are looking for other BMW Hoses, Pipes & Tubes, check out the BMW Hoses, Pipes & Tubes available in our store to find a complete solution for your cooling system or other vehicle installations.

To compare different manufacturers' approaches to system design and spare part selection, you can read an article about the modernization of a popular hot hatch: Hot Hatch Legend: The Evolution of the VW Golf GTI from Mk1 to Mk8 – Design Changes and VW Car Parts. This provides good technical background when planning your own service and modernization work.