: Legacy software specifically designed for older Citroën vehicles.
If you are not sure which software to download, you can contact the ACTIA IME team for assistance. After downloading the software, IS THIS 9780.Z5 A FULL CHIP? - French Car Forum
Attempting to open or extract a .z5 file with conventional tools (WinRAR, 7-Zip) will fail. It is designed exclusively for the PSA XS Evolution’s built-in update utility.
: The legacy diagnostic software for older Citroën vehicles. AliExpress Choosing the Right Version for Download