Ford Fiesta Mk8 Focus Mk4 ST Coolant Water Pump Unit HX7G-8501-AA

Ford Fiesta Mk8 Focus Mk4 ST Coolant Water Pump Unit is an original component from the Water pumps group, designed for the cooling system of modern Ford engines. Thanks to its factory design, it ensures proper coolant circulation, stabilizing engine operating temperature and supporting its durability in daily operation.

Specifications and technical data

• SKU: 2645271
• Mark: Ford
• Condition: Used
• OEM Part Number: 2645271
• Substitutable numbers: HX7G-8501-AA, HX7G8501AA, 2645271
• Part type: Engine Water Pump
• Category: Water Pumps

Purpose and compatibility with Ford models

The presented water pump has been designed for use in sporty and dynamic versions of Ford vehicles, such as the Fiesta Mk8 and Focus Mk4 ST. The design, based on the vehicle manufacturer's solutions, allows for precise fitment to the cooling system without the need for engine accessory modifications.

The original Ford branding ensures the maintenance of factory coolant flow parameters, housing geometry, and mounting points, which translates into proper cooperation with the drive belt, pulleys, and other system elements.

Technical and functional characteristics

The water pump is responsible for the forced circulation of coolant between the engine block, cylinder head, and radiator, maintaining a stable operating temperature range. In practice, this translates into:

• efficient dissipation of excess heat from the engine unit,
• reduced risk of overheating under load,
• maintenance of optimal operating conditions for engine oil and accessories,
• proper cooperation with the thermostat and temperature sensors.

Thanks to a design that meets Ford's requirements, the pump maintains the correct flow characteristics across the entire RPM range, which is particularly important in ST versions, where the engine more frequently operates under higher loads.

Condition, origin, and benefits of choosing OEM parts

The component comes from the original Ford production line, ensuring consistency with factory quality and compatibility standards. Used condition means that the pump has been previously operated but retains functionality that allows for further use after proper installation and verification by a mechanic.

Choosing an original water pump from this series offers, among other things:

• preservation of factory geometry and mounting points,
• certainty of fitment to the cooling system of specific Fiesta and Focus ST generations,
• reduced risk of issues with accessory belt tension and leaks.

Installation and maintenance tips

When replacing the water pump, it is recommended to simultaneously check the condition of the drive belt, idler pulleys, and the tightness of the cooling system hoses. Proper installation, system bleeding, and the use of coolant with parameters compliant with the vehicle manufacturer's recommendations allow you to fully utilize the potential of this part.

It is also a good solution to diagnose the entire coolant circuit – including the radiator, heater core, and thermostat – to avoid the recurrence of faults related to engine overheating or underheating.

Expanding knowledge and part selection by numbers

When selecting engine system components – including pumps, injectors, or other sub-assemblies – knowledge of identification procedures by factory numbers as well as regeneration and diagnostic principles is helpful. A detailed discussion of these topics can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes knowledge about component operation, methods of selection by OEM numbers, and workshop-condition maintenance.

If you are planning a comprehensive repair or upgrade of your Ford's engine area and need other elements from the same group, such as additional pumps, cooling circuit elements, or related cooling system components, check the available parts in the Ford water pumps category.