Water Pump BMW F80 M3 F82 M4 F87 LCI M2 S55 Auxiliary Coolant Unit 7850568

The BMW F80 M3 F82 M4 S55 Auxiliary Water Pump is a component from the water pumps category, designed for the cooling system of sport BMW models with the S55 engine. This used OEM part helps maintain the engine's factory operating characteristics, ensuring stable coolant circulation support under demanding operating conditions. It's a solution for drivers who expect a proven design and proper fit for the factory system.

Specifications and technical data

• SKU: 7850568
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7850568
• Substitutable numbers: 7850568, 11517850568, KD
• Color: Black
• Category: Water Pumps

Purpose and Role in the Cooling System

The auxiliary water pump in the BMW F80 M3 and F82 M4 with the S55 engine is responsible for supporting coolant circulation in critical circuits of the system. In high-performance vehicles, this is crucial for maintaining stable operating temperatures, especially during dynamic driving or intensive use on highways.

Using an original water pump in this application allows for:

• maintaining factory coolant flow parameters,
• proper interaction with the vehicle's control electronics,
• reducing the risk of overheating of components working with the cooling system.

Construction and Design

The pump housing is manufactured in a typical OEM BMW style, with an emphasis on durability and resistance to thermal conditions in the engine bay. The black color of the housing facilitates aesthetic integration with other engine components, without altering the original appearance of the engine bay.

The arrangement of the outlets and mounting points is consistent with the factory design for the S55 engine, which aids in installation without the need for modifications to hoses or brackets. This makes the pump a plug-and-play solution within the original cooling system configuration.

Benefits of Using an Original BMW Water Pump

Replacing a worn-out component with a BMW auxiliary water pump restores proper coolant circulation in the circuits designed by the manufacturer. This is important for both the durability of the engine and the stability of performance during extended load cycles.

Key advantages of this solution include:

• factory fit for the S55 engine cooling system,
• compatibility with the operating parameters of the stock engine control unit,
• reduced risk of leaks resulting from improper fit.

Condition and Service Application

The pump is offered as a used original part, providing an attractive cost-effective alternative to new components while maintaining factory design. This type of part is suitable for both routine repairs and comprehensive cooling system service work on BMW F80 M3 and F82 M4 models with the S55 engine.

Due to the nature of the auxiliary water pump's operation, its correct selection based on manufacturer markings and compatibility with the engine is crucial for the reliability of the entire system.

Selection by Markings and Technical Support

When selecting this pump, it is advisable to refer to the manufacturer's markings and the vehicle's technical documentation to ensure full compatibility with the specific configuration of the BMW F80 M3 or F82 M4. If you have any doubts regarding the interpretation of markings or service procedures related to fuel systems and pumps, the following guide may be helpful: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which discusses, among other things, the principles of selecting components by manufacturer markings.

Other BMW Water Pumps

If you are also looking for other BMW water pumps for different BMW models, check out the BMW water pumps available in our assortment to select the right component for your specific engine version and vehicle year.