Ford Fiesta ST Mk5 Thermostat Coolant Hose Line Tube Pipe 1487291

Ford Fiesta ST Mk5 Thermostat Coolant Hose Line Tube Pipe is an original cooling system component designed for precise coolant routing in the thermostat area. Thanks to its factory geometry and specific engine version fitment, it ensures stable temperature conditions and proper operation of the entire cooling system. This used OEM component is a sensible choice for maintenance when you want to preserve the design intended by the manufacturer.

Specifications and technical data

• SKU: 1487291
• Mark: Ford
• Condition: Used
• OEM Part Number: 1487291
• Substitutable numbers: 1487291, 4M5G-8A582-AD, 4M5G8A582AD, 4M5G-8A582-AE, 4M5G8A582AE
• Category: Coolant Hoses

The role of the coolant hose at the thermostat

The coolant hose in the thermostat zone is responsible for the directional flow of fluid between key sections of the cooling system. In practice, this means:

• maintaining proper fluid circulation within the engine's operating temperature range,
• reducing the risk of localized overheating in the cylinder head and block area,
• stable integration with the thermostat housing and other cooling hoses.

A well-chosen hose in this section of the cooling system has a direct impact on the trouble-free operation of the powertrain and the longevity of other components, such as the radiator or water pump.

Construction and fitment for Ford Fiesta ST Mk5

The hose in question belongs to the Cooling system hoses and pipes group, meaning it has been designed to operate under variable pressure and elevated temperatures. The characteristic features of this element include:

• a shape tailored to the engine bay layout of the Ford Fiesta ST Mk5,
• manufacturer-designed connection points for the thermostat and adjacent system sections,
• material resistance to long-term contact with coolant.

Thanks to its factory origin, the hose maintains the proper rigidity and flexibility at bends, which facilitates installation and reduces stress on connectors and clamps.

Benefits of using an original Ford hose

Choosing a used, original coolant hose for the Ford Fiesta ST Mk5 allows you to maintain the parameters specified by the vehicle manufacturer. In practice, this translates into:

• secure fitment with the thermostat housing and other system elements,
• reduced risk of leaks resulting from imprecise fitment,
• maintenance of the factory cooling system performance characteristics.

This solution is particularly recommended for repairs where the priority is preserving the original system design and predictable engine behavior across the full load range.

Application in cooling system service and diagnostics

The coolant hose at the thermostat should be replaced whenever symptoms such as fluid leaks, signs of corrosion on clamps, or visible material cracks appear. Combined with checking the thermostat, water pump, and radiator, this helps restore proper fluid circulation and reduce the risk of engine overheating. For users who want to better understand the dependencies in this area, the article Engine cooling system – overheating, repair, and used radiators, which discusses the impact of an efficient coolant circuit on engine durability, will be helpful.

Expanding Ford cooling system service

If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other elements from the same group, such as additional hoses, return lines, or sections connecting to the radiator, check out the available parts in the Ford cooling system hoses and pipes category.