ConsolePlug CP06082 MT1335We mediatek for xbox360 Slim lite-on 16d4s dvd drive           
The Liteon DG-16D4S 0225/0401 models are hardware locked so it is impossible to flash them. We are able to offer a kit so that you can replace the main controller IC with this alternative MT1335 version which has the write protect disabled. There are also parts included to enable / disable the write protect manually so as soon as you install your firmware you can lock the drive down so it can't be upgraded by anyone else but you 
Please note this is for professional installers only. Do not buy this or attempt to install it if you are not highly skilled. You will have to remove the old chip and this includes removing all of the resin around the MT1335 chip and then desoldering the chip, and then soldering the new IC with the write protect enable / disable connections also