Diagbox is the official diagnostic software used by Peugeot and Citroën (PSA Group, now Stellantis) dealerships. It is a powerful platform that allows users to communicate with the various Electronic Control Units (ECUs) within a vehicle.

In the world of automotive diagnostics, few names carry as much weight among Peugeot and Citroën enthusiasts and independent mechanics as . For owners of older Peugeot and Citroën models, specific versions of this software are not just preferable—they are essential.

Once activated, the software will ask for profile information. You can enter generic text, but you must let the program restart to finalize the v7.02 base.