Just installed the HID kit on my 2012 320i, no flickering and no system malfunction code. I bought the kit from this ebay seller for $35 bucks. Make sure you order the H7R kit, the R kit is supposedly designed for halogen headlights to reduce glare. Here is the advice for those of you having trouble removing the H7 bulb. make sure you leave the connector connected to the bulb, then you hold onto that and pull the bulb out by tilting the bulb from the bottom. my left side came out quite easy, then the right side is a little tight. I believe the H7 bulb is pressed fit into the bulb holder.
Also installed the LED Parking lamp. no error either.
http://www.ebay.com/itm/270921200523...84.m1439.l2649