Xenons4U is the UK’s leading high quality and affordable car parts provider. We offer Koito KDLT003 39000-78515 Toyota 85967-33031 Xenon Light Control Computer ballast. Factory fitted on many different Toyota and Lexus cars with D4S D4R 35W xenon headlamps. Toyota 85967-33031 headlight ballast only will work with D4S or D4R 35W bulbs and won't work with similar looking D2S types, because of different voltages. Xenon Light Control Unit comes with a bulb cord also known as bulb holder, as it is integrated inside the part. No coding is required once replaced with a new part. For more information visit our website.