Xenons4U is the UK’s leading high quality and affordable car parts provider. We offer Valeo Ballast7Green 89089352 Xenon Ballast Control Unit. Factory fitted on many different brand cars with D3S D3R D4S D4R 35W HID headlamps. If your Xenon Lights are blinking or shutting down without any reason it means that control unit has failed, but before buying new ballast we always recommend to double check old HID bulb or change sides xenon control unit. It is direct replacement, no coding is required. For more information visit our website.