BMW 3 Series E90 E91 Engine Cooling Radiator Bottom Thermostat Hose Line 7552407

BMW E82 E90 Water Hose Pipe Tube 7552407 Petrol is an original cooling system component from the Hoses, Pipes and Tubes category, designed for BMW models with petrol engines. The used OEM water hose ensures proper coolant flow, stable engine operation, and compliance with the factory system design.

Specifications and technical data

• SKU: 7552407
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 17127552407
• Substitutable numbers: 17127552407, 7552407
• Category: Hoses, Lines & Pipes

Purpose and Function of the BMW Water Hose

The presented water hose is a component of the cooling system responsible for the safe flow of coolant between engine components. Thanks to its factory fit for BMW E82 and E90 series with petrol units, the following are maintained:

• correct coolant flow geometry,
• system stability within typical temperature ranges,
• compatibility with original connectors and fittings.

Original origin from the BMW OE line means the hose has been designed for specific mounting points and connection diameters, which reduces the risk of leaks and installation problems.

Construction and Fit for the Cooling System

The hose belongs to the group of flexible cooling system elements that must withstand variable fluid pressure and temperature. The construction has been developed to:

• maintain appropriate rigidity while allowing for assembly flexibility,
• ensure a seal after proper tightening of clamps or quick connectors,
• not interfere with other components in the engine bay.

Thanks to this, the BMW water hose works well with the factory fluid pump, radiator, and other hoses, promoting even temperature distribution in the engine and reducing the risk of overheating.

Benefits of Using an Original BMW Hose

Using an original water hose to replace a worn or leaking component restores the correct operating parameters of the cooling system. Key benefits include:

• factory fit for specific BMW E82/E90 generations with petrol engines,
• maintaining the manufacturer's designed coolant flow path,
• reducing the risk of leaks and pressure drops in the system,
• consistency with other BMW OE cooling system components.

A used OEM part is a cost-effective solution that also allows the system's construction to be maintained at the standard intended by the vehicle manufacturer.

Condition, Verification, and Service Application

The water hose is in the Hoses, Pipes and Tubes category, which facilitates its identification when planning a repair or upgrade of the cooling system. A used component is a good choice in situations where:

• the existing hose shows signs of cracks, splits, or material softening,
• there are coolant leaks around hose connections,
• the component needs to be replaced with a part that matches the factory BMW specification.

Before installation, a standard visual inspection and leak test of the connections after starting the engine are recommended to ensure the cooling system operates under stable conditions.

Selection and Other BMW Hoses, Pipes and Tubes

When selecting a water hose, it is advisable to verify compatibility with the specific engine version and vehicle year, using BMW catalog data or part numbers from the technical specification. If you plan to replace more cooling system components during servicing, a wider selection from the same product group may be helpful. In our store, you will also find other BMW Hoses, Pipes and Tubes, allowing you to assemble a set of components matched to a single vehicle model.

To compare the characteristics of sports and standard powertrains and chassis, as well as how components are selected in higher-powered cars, you can read the guide article: Audi RS vs. Other Models – What's Under the Hood and Chassis?. This will help you better understand the importance of correctly selecting components such as hoses, pipes, and tubes in terms of durability and operational safety.