89030469 Xenon HID Headlight Ballast 12V 35W 3D0909158 68019173AA 5408497 For Cadillac. Durable and robust materials: The heat-resistant metal casing ensures a long ballast lifespan. Designed to withstand vibration and extreme weather conditions. Function: The basic control unit for the HID headlight system, ensuring high beam compatibility and thus improving visibility. Easy Installation: Simply replace your old or damaged HID headlight ballast with our product, saving time and effort. Rigorously tested for long-term use. Note: Please verify the part number before purchasing to ensure compatibility., Manufacturer: HNCWSM