So after I did my OEM HID conversion on my B8.5, I am having this chronic issue where one bulb will blow out after about 6 months. My conversion uses all OEM parts, so IDK what else could be causing the issue besides some faulty bulbs. I am very careful to not touch the bulbs when installing them etc. I even bought OEM Osram Xenarc bulbs from a legit eBay seller, Thank god for their 2yr warranty because I will be going on my 3rd set of bulbs.