You should buy 2 new HIDs. They should be replaced in pairs.
As for the instructions, there is a #20 security torx screw you have to remove.
After its removed you have to twist the black cover about a 1/4 turn (it shows on the cover which way to turn)
After its turned you can pull it out of the way. Then there is a metal clip that is a spring loaded that you push in and move to the side. Once thats is uncliped the bulb simply pulls out.
(The bulb is removed to show the clip)
Be careful not to touch the new bulb as the oils from your finger will cause them to burn out.
Contact our vendor Excelerate for good replacement bulbs.