Ford Fiesta St Mk5 Fuse Box Relay Box Module 2.0 DURATEC ST150 6S6Y-14401-NDF

Ford Fiesta St Mk5 Fuse Box Relay Box Module 2.0 DURATEC ST150 is an original electrical system component designed for the sporty Fiesta ST version with the 2.0 DURATEC engine. This factory fuse box from the Fuses and fuse boxes category ensures proper circuit protection, stable operation of on-board systems, and compatibility with the original Ford wiring harness.

Specifications and technical data

• SKU: 6S6Y-14401-NDF
• Mark: Ford
• Condition: Used
• OEM Part Number: 6S6Y-14401-NDF
• Substitutable numbers: 6S6Y-14401-NDF, 6S6Y14401NDF, 1510728
• Part type: Fuse Box
• Category: Fuses & Fuse Boxes

Purpose and function in the Ford Fiesta St Mk5

The presented fuse box is an electrical system component dedicated to the ST150 version, where current loads are higher than in standard model variants. It is responsible for the logical distribution of power, protection of individual circuits, and rapid power cutoff in the event of a short circuit or overload. Thanks to this, key systems – from engine control and lighting to comfort equipment – can operate in a predictable and safe manner.

Construction and advantages of the original fuse box

The box was designed by Ford for full compatibility with the factory wiring, connectors, and mounting brackets in the engine bay or inside the vehicle (depending on the specific car configuration). The original design ensures:

• reliable current conduction thanks to matched tracks and contacts,
• stable mounting without stressing the wiring harness,
• easy access to fuses during diagnostics and service,
• preservation of the factory circuit layout without the need for installation modifications.

Using an original component helps avoid problems with mismatched plugs, different socket layouts, or non-compliance with service documentation.

Condition, selection, and service application

The item is offered as used, which in practice means the possibility of an economical repair of the electrical system while maintaining the original Ford specification. This solution is particularly beneficial for:

• damage after a short circuit or flooding of the box,
• problems with unstable power supply to selected circuits,
• rebuilding a car after a collision or bodywork repairs in the electrical installation zone.

Thanks to the preservation of the factory pin and socket layout, the box can be used as a direct replacement for a damaged module, without the need to modify harnesses or use adapters.

Benefits of using an original Ford component

Choosing an original fuse box for the Ford Fiesta St Mk5 translates into a number of practical service and operational benefits:

• Full electrical compatibility – maintaining factory protection parameters and circuit layout.
• Easier diagnostics – the fuse layout corresponds to Ford service diagrams, which facilitates the work of electricians and diagnosticians.
• Consistency with other installation elements – no need to modify harnesses, create adapters, or change protection values.
• Reduction of secondary failure risk – using a component designed exactly for this model and engine version.

Expansion and other Ford protection system elements

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Ford and need other elements from the same group, such as additional boxes, sockets, or protection modules, check the available parts in the Ford Fuses and fuse boxes category.

Technical support and selection by part numbers

When selecting a fuse box for a specific Ford Fiesta St Mk5 configuration, it is crucial to compare the markings with the existing element and the vehicle documentation. In case of doubt, it is worth consulting an automotive electrician or a service specializing in the Ford brand to confirm the compatibility of the socket layout and the purpose of individual power tracks.

For users interested in a broader context of selecting parts by numbers and power system diagnostics, an article describing the principles of operation and servicing of the fuel system may be useful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. Although it concerns a different system, it well illustrates the approach to identifying elements by numbers and proper diagnostics in modern cars.