BMW E-Sys is a powerful software used for coding and flashing F-series (and newer) BMWs. While the versions you mentioned (E-Sys 3.25.3 and Psdzdata v51.3) are older, they are stable for many early F-series models like the F10, F20, and F30.
: Most current guides recommend using newer versions like E-Sys 3.30.1 or 3.40.2 combined with third-party tools like BimmerUtility to handle modern data "trimming" (the removal of descriptions from newer data files). PSdZData v51.3 Overview E-sys 3.25.3 And Psdzdata Files V51.3
: Version 3.25.3 introduced a major shift in security protocols. It required a completely new .EST Token BMW E-Sys is a powerful software used for
compared to version 3.24.3, leading many to stay on the older version to avoid the more complex token requirements. particular BMW model or chassis Retrofit guides that were written in 2017-2019 –