Problem:
I got the VXDIAG VCX SE for BMW scanner working with ISTA+ 4.35.20. It failed to read the VIN, and manual input also failed. There was no communication with a 1999 BMW model.
Solution:
The VXDIAG VCX BMW cannot handle such old vehicles, especially K-line models. It works better on BMW models from 2005 onwards, similar to other brands.