Water Pump BMW F40 F45 F48 Mini F55 F56 B47 Coolant Unit 8585808

Water Pump BMW F40 F45 F48 Mini F55 F56 B47 Coolant Unit is an original component from the Water pumps group, designed for the cooling system of modern BMW and Mini B47 series engines. This used OEM part ensures factory impeller geometry, proper coolant flow, and compatibility with factory engine accessories, which facilitates installation and subsequent operation.

Specifications and technical data

• SKU: 8472103
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8472103
• Substitutable numbers: 8472103, 11518472103
• Category: Water Pumps

Purpose and role in the cooling system

The water pump in the B47 engine is responsible for the forced circulation of coolant between the engine block, cylinder head, radiator, and other components of the thermal system. A properly functioning pump stabilizes the operating temperature, reduces the risk of overheating, and supports uniform heat dissipation from critical areas of the power unit.

In BMW F40, F45 and Mini F55, F56 vehicles, the use of a dedicated water pump allows for maintaining operating parameters in accordance with the manufacturer's specifications, which translates into predictable engine behavior, correct cooperation with control electronics, and optimal cooling system efficiency.

Advantages of using an original BMW water pump

Choosing an original pump from the Water pumps group ensures:

• factory fitment to the engine housing and cooling system hoses,
• maintenance of the coolant flow designed by the manufacturer,
• correct cooperation with temperature sensors and engine management,
• consistency with other thermal system components in BMW F40, F45 and Mini F55, F56 models.

As a result, the installation process is straightforward, without the need for modifying mounts or hoses, and the cooling system can operate under stable temperature conditions after replacement.

Performance characteristics and installation

The water pump designed for the B47 engine is engineered to work with factory auxiliary drive equipment. The appropriate design of the housing and impeller enables efficient coolant pumping both in urban conditions and during long-distance highway driving, where the thermal load on the power unit is significantly higher.

A used OEM water pump is a solution that allows for cost-effective cooling system repair while maintaining original operating parameters. In practice, this means the ability to restore proper coolant circulation without the need to resort to aftermarket replacements with unverified flow characteristics.

Part selection by numbers and integration with other components

The selection of a water pump for a specific BMW or Mini vehicle with a B47 engine should be based on the manufacturer's catalog data, VIN number, as well as OEM part numbers and interchangeable numbers. This approach minimizes the risk of dimensional incompatibility, differences in mounts, or different configurations of connection ports.

When planning a wider range of work on the cooling system – including, for example, replacing the radiator, thermostat, or hoses – using an original water pump makes it easier to maintain the consistency of the entire system and reduces the risk of leaks or improper venting.

Cooling system service expansion and related components

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 pumps, housings, or mounting elements, check the available parts in the BMW Water pumps category.

During service work, it is also worth paying attention to related vehicle systems, such as fuel supply or engine management. To better understand the dependencies between individual components, diagnostics, and component selection by OEM and VIN numbers, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.