How-to: Add a spare key to BMW CAS3++ ISTAP using xhorse vvdi key tool plus and Godiag BMW CAS2/CAS3 test platform.
Set up connection as following
Insert original key into test platform
Select IMMO Programming->BMW->Select from system->CAS3/CAS3+ IMMO System->Key fucntion->Generate key via OBD
Read Key information.
It is CAS3++ ISTAP
Remove dealer key from ignition
Select Prepare dealer key with programmer
Select unused key potion and prepare dealer key
Insert new key into vvdi key tool plus programmer
The key is not smart key, press NO
Make dealer key success
Select Add key
Write Key success
Read new key information
New key was programmed successfully.
Test the new key.