BMW F20 F21 F22 F23 F30 F31 F32 Coolant Radiator Pipe Hose B58 Petrol 8662840

BMW F20 F21 F22 F23 F30 F31 F32 Coolant Radiator Pipe Hose B58 Petrol is an original component from the Cooling system pipes and hoses group, designed for B58 petrol engines in popular BMW 1, 2, and 3 series models. It ensures tight and stable routing of coolant between system components, which translates into safe engine operation and predictable operating temperatures.

Specifications and technical data

• SKU: 8662840
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8662840
• Substitutable numbers: 8662840, 17128662840
• Fuel type: Petrol
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose is a component of the cooling system for the B58 petrol engine, used in compact and mid-size BMW F-series models. Its task is to direct the flow of coolant between key components, such as the engine block, radiator, or auxiliary modules, in accordance with the factory flow characteristics.

Thanks to its properly selected shape and diameter, the hose maintains stable operating pressure and reduces the risk of local fluid turbulence, which promotes uniform heat dissipation from the engine. Proper coolant routing is particularly important in modern turbocharged petrol engines, where thermal loads are significantly higher.

Construction and fitment for BMW F-series models

The hose has been designed for specific body variants of the BMW F20, F21, F22, F23, F30, F31, and F32, ensuring a precise fit to factory brackets, connectors, and routings in the engine bay. The appropriate geometry of the hose minimizes material stress, reduces the risk of rubbing against adjacent components, and facilitates installation in tight working spaces.

As an element from the Cooling system pipes and hoses group, the hose is adapted to work with coolants used in petrol engines, taking into account typical temperature and pressure ranges for the B58 unit. The use of original geometry allows for maintaining factory cooling parameters and compatibility with other system components.

Benefits of using an original coolant hose

Using an original coolant hose in the B58 engine brings a number of practical operational benefits:

• Factory fitment – the hose is prepared to work with specific engine and accessory variants, which limits the need for modifications.
• Stable coolant flow – the proper cross-section and length of the hose support maintaining the fluid circulation designed by the manufacturer.
• Reduced risk of leaks – matched ends and proper material flexibility promote a tight connection with system connectors.
• Support for engine durability – a properly functioning cooling system helps maintain the operating temperature within a safe range, which affects the engine's service life.

Performance characteristics and installation

The item comes from a used vehicle, which allows for an economical hose replacement while maintaining compliance with factory specifications. During installation, it is recommended to check the condition of the cooperating clamps and connectors, as well as to bleed the cooling system after completing service work.

Thanks to a design consistent with the solutions used by the vehicle manufacturer, the installation of the hose can be carried out in a predictable manner, using standard service procedures for the B58 engine. This is a good solution for users who want to restore proper coolant circulation without interfering with the system design.

Technical support and additional materials

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 additional pipes, return hoses, or sections connecting the radiator to the engine, check the available parts in the BMW cooling system pipes and hoses category.

To better understand how operating conditions affect the durability of the cooling system and when it is worth considering the replacement of components such as hoses, radiators, or fans, read the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. This is a practical addition to your knowledge when planning service work on your car.