Ford Focus St-2 Mk2 Xenon Headlight Ballast Right O/S VP4M5X-13C170-AA

Ford Focus St-2 Mk2 Xenon Headlight Ballast Right O/S is an original lighting system component designed for installation on the passenger side (Right / O/S). As part of the Headlight ballasts and igniters category, it is responsible for the stable power supply of the xenon burner and the proper operation of the headlight, which directly affects driving safety after dark. This used OEM component is a sensible choice for professional headlight system repairs in the Ford Focus ST-2 Mk2.

Specifications and technical data

• SKU: VP4M5X-13C170-AA
• Mark: Ford
• Condition: Used
• OEM Part Number: VP4M5X-13C170-AA
• Substitutable numbers: VP4M5X-13C170-AA, VP4M5X13C170AA, 1324264, 4M51-13C170-AA, 4M5113C170AA
• Location on the vehicle: Right
• Category: Headlight Ballasts & Ignitors

Purpose and function in the lighting system

The presented ballast is dedicated to the right xenon headlight in the second-generation Ford Focus ST-2. Its task is to control the ignition process and stabilize the voltage supplying the burner, which ensures a uniform light beam and correct light color. A properly selected ballast minimizes the risk of flickering, lamp failure, and errors in the lighting control system.

Thanks to its factory origin from the Ford brand, full compatibility with the vehicle's electrical installation and headlight construction is maintained, without the need for wiring or housing modifications. This is particularly important in cars equipped with advanced lighting control systems.

Construction, installation, and fitment

The xenon ballast is designed as a module mounted directly to the headlight on the right side of the vehicle. The electronic system is enclosed in a sealed housing, adapted for operation in the wheel arch area and exposure to variable weather conditions. The OEM design ensures proper placement of connectors and mounting points, which facilitates installation and reduces service time.

In practice, this means:

• a secure fit for the right Ford Focus ST-2 Mk2 xenon headlight,
• compatibility with the factory electrical wiring,
• stable operation of the xenon lamp ignition system.

The used condition of the component allows for economical repair while maintaining the manufacturer's original specifications, which is beneficial for both workshops and individual users.

Application in diagnostics and repair

This ballast model is particularly useful in situations where symptoms such as intermittent light failure, problems with re-ignition, or lighting error messages appear in the right xenon headlight. Replacing the module with an original, used component allows you to restore the proper operation of the system without the need for costly replacement of the entire headlight.

For workshops specializing in automotive lighting, this is a practical service solution that enables quick troubleshooting while maintaining high quality and compliance with factory standards. This type of Ford xenon ballast fits well into professional repair procedures based on modular diagnostics.

Complementary items from the same group

If you are planning a comprehensive repair or upgrade of the front lighting area in your Ford and need other elements from the same group, such as additional control modules, igniters, or other headlight power supply systems, check the available parts in the Ford headlight ballasts and igniters category.

Technical support and driver knowledge

When working with a vehicle's electrical system – especially in cars equipped with extensive comfort and safety systems – it is worth knowing the principles of power component diagnostics. For drivers interested in a broader context of electrical component operation, a practical guide on our blog may be useful: When is it worth replacing an alternator with a used one: a practical guide for drivers. It allows you to better understand the specifics of used electrical components and make informed service decisions.

Summary

Ford Focus St-2 Mk2 Xenon Headlight Ballast Right O/S is an original, used module from the Headlight ballasts and igniters group, designed for installation on the right side of the vehicle. It ensures stable operation of the xenon lamp, is structurally matched to the factory headlight, and provides a cost-effective solution for repairing the lighting system in this Ford model.