AUTOKAY HID Xenon Ballast D3S/D3R for Cadillac XTS CTS — Direct-Fit OEM Replacement

AUTOKAY HID D3S/D3R xenon ballast replaces factory units to restore reliable high-intensity discharge headlight function for compatible vehicles.

If your Cadillac XTS or CTS (or another compatible model) shows flickering, slow start-up, or complete HID failure, a faulty ballast is often the culprit. This AUTOKAY ballast is designed as a direct-fit, aftermarket replacement that matches common OEM interchange part numbers and fits left or right front mounting locations. Before ordering, verify electrical connector style and part number compatibility with your vehicle using the chart in the listing.

Will this AUTOKAY ballast fit my Cadillac XTS or CTS?

Compatibility depends on the original headlight system and the factory ballast part number. The AUTOKAY unit covers multiple interchange numbers used across Cadillac, Land Rover, Kia, Volvo, Dodge and Chevrolet applications, so it fits many late-model installations.

• Replaces common OEM numbers like 1 307 329 315 15 and A 222 900 33 00
• Fits front-left and front-right mounting positions
• Works with D3S / D3R xenon bulbs used in listed vehicles

How does this ballast improve headlight performance?

The ballast provides the high-voltage ignition pulse and stable current control required for xenon HID bulbs to start quickly and maintain consistent light output. Replacing a failing ballast eliminates flicker, delayed start, and uneven beam intensity without changing the bulb itself.

• Delivers correct ignition voltage for D3S/D3R xenon bulbs
• Stabilizes current to prevent flickering or dimming
• Restores consistent beam pattern and brightness when matched to compatible bulbs

What vehicles and parts are covered by this replacement ballast?

This AUTOKAY ballast supports a range of models that originally used similar ballast modules. It is commonly fitted to Cadillac XTS and CTS, several Land Rover Range Rover variants, Kia Sorento, Volvo C30/C70, Dodge Dart, and Chevrolet Camaro, among others. Always cross-check the interchange numbers and connector type.

• Cadillac: XTS, CTS
• Land Rover: Range Rover models using D3S/D3R systems
• Kia, Volvo, Dodge, Chevrolet applications listed in the compatibility data

What should I check before buying and installing this ballast?

Confirm the original ballast part number and plug style to ensure a direct replacement. Inspect the headlight wiring and bulb condition; replacing only the ballast when the bulb or wiring is damaged can leave the issue unresolved. Professional or experienced DIY installation is recommended for proper alignment and secure mounting.

• Match one of the interchange numbers (e.g., 130732931515, A2229003300)
• Confirm D3S vs D3R bulb type used in your headlights
• Check connectors, mounting points, and surrounding wiring for damage

Who is this for: This AUTOKAY HID ballast is aimed at vehicle owners and mechanics who need a cost-effective, direct-replacement ballast for D3S/D3R xenon headlights on Cadillac XTS/CTS and other compatible models. It suits do-it-yourselfers comfortable working with headlamp assemblies and professional shops needing a reliable aftermarket option that matches multiple OEM part numbers. If you’re replacing a failing ballast to stop flicker, slow start, or no-start issues, this unit provides a straightforward swap—just verify fitment and connector compatibility before purchase.