Ford Focus Mk2 ST Headliner Curtain Air Module Unit Left N/S 7M51-B14K159-AC

Ford Focus Mk2 ST Headliner Curtain Air Module Unit Left N/S is an original safety component designed for installation on the driver's side. Thanks to its factory-fit design for the second-generation Focus ST body structure, it ensures seamless operation with the airbag system and maintains the correct geometry of the mounting points within the headliner. This is a practical solution for users looking to restore the full functionality of the safety system in a controlled manner following a collision or interior replacement.

Specifications and technical data

• SKU: 7M51-B14K159-AC
• Mark: Ford
• Condition: Used
• OEM Part Number: 7M51-B14K159-AC
• Substitutable numbers: 1491812, 7M51-B14K159-AC, 7M51B14K159AC
• Location on the vehicle: Left
• Category: Headliners & Parts

Purpose and function in the vehicle

The presented curtain airbag module is a component mounted within the Headliner and parts area on the left side of the vehicle. Its task is to work with the factory SRS system in the Ford Focus Mk2 ST to provide side impact protection for the head area of the driver and passengers on that side in the event of a road incident. The module's design is adapted to the specific roofline and body pillar shape of the ST version, which facilitates proper routing and mounting along the edge of the headliner.

By maintaining the original geometry and mounting points, the module works with factory brackets, clips, and guides, reducing the need for modifications during installation. This is particularly important for post-accident repairs, where precise restoration of the factory safety system configuration is essential.

Original origin and compatibility

The curtain module was designed by Ford specifically for the Focus Mk2 ST version, which means full compatibility with the factory airbag control unit and the wiring harness in this model. Its original origin translates into predictable performance parameters, correct response times, and compatibility with other passive safety system components.

The item has an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific vehicle equipment version. When selecting, it is worth comparing the markings with service documentation or the existing part to ensure that the module corresponds to the configuration used factory-wide in the given Focus ST unit.

Installation characteristics and application

The module is intended for installation on the left side of the vehicle, along the roof edge, in the headliner zone. Its design takes into account the path of the A, B, and C pillars and the rest of the body, allowing for proper positioning relative to the roof lining and side trim elements. This makes it possible to maintain the appropriate working space for the deploying curtain airbag.

In practice, the module is primarily used for:

• post-accident repairs, when the curtain on the left side has been deployed,
• comprehensive interior replacement, including the headliner and safety components,
• professional vehicle restoration, where recreating the factory SRS system configuration is key.

Due to the nature of the component, installation is recommended at a specialized service center that has the appropriate diagnostic facilities to handle airbag systems.

Condition, origin, and benefits of choosing a used part

The offered curtain airbag module is a used part, sourced from vehicle dismantling. This type of solution allows for a significant reduction in repair costs compared to purchasing a new component, while maintaining the manufacturer's original specifications. For many Focus ST users, this is a reasonable compromise between budget and maintaining factory quality and compatibility.

Choosing an original used part is particularly beneficial for safety components, where it is important to maintain compatibility with the control system, electrical wiring, and body structure. This helps avoid problems typical of some aftermarket replacements, such as improper fitment or communication errors with the vehicle's electronics.

If you are planning a comprehensive repair or upgrade of the roof and headliner area in your Ford and need other components from the same group, such as reinforcements, mounts, or additional covers, check out the available parts in the Ford Headliner and parts category.

Safety, part selection, and service knowledge

When working with the airbag system, it is crucial to follow safety procedures and use components that comply with the manufacturer's documentation. In case of any doubts regarding component selection, installation methods, or the cost-effectiveness of using dismantled parts, it is worth seeking professional service advice. A good starting point may be an article describing how to consciously use original used parts in premium class cars – you can find more on this topic in the material Luxury within reach – how to service a Porsche legend using proven used parts, which demonstrates a universal approach to safe servicing using verified components.