Good news!!!Xprog M ECU programmer updated to latest version V5.51 with USB key and BMW CAS4 Decryption feature. Here is the xprog v5.51 software installation instruction by OBDII365.com. Easy 5 steps.
Operating system: Windows XP/ WIN7
Language: English/Chinese
Note: Xprog box programmer 5.51 can only use our software CD and our hardware (Item No: SM44). DO NOT update software online.