Done Range rover sport 2007 CEM all keys lost on bench using Xhorse Vvdi Prog and Autel IM608. The CEM is behind the glove box.
I tried with Autel whole job didn’t work I have to use vvdi prog. Autel fail to read then I read with vvdi pro and vvdi2 to program chip after car start then add new remote key by Obd.
Autel didn’t read CEM, read by vvdi prog and after you can use Autel/vvdi2 to load into it and make the key.
In my experience, Autel couldn’t do it. Read CEM, made key, and says ‘Chip Unlock Failed’ when writing back. Original key stopped working, thought user error so repaired the car and tried again on another but came to the same issue, Autel bricked the car when writing back.
Transfer a file from Vvdi to autel via email.
Car starting, you need to write back new file to CEM.