: While the "plain" E-Sys is best for flashing, you will need a tool like BimmerUtility or ESysUltra to perform FDL coding on modern firmwares. Common Applications
ESYS (E-Sys) is the unofficial name for the engineering software BMW dealers use to flash firmware and code options into vehicle control modules (ECUs). Unlike ISTA (the dealer’s diagnostic interface), ESYS provides low-level access to the vehicle’s VO (Vehicle Order) and CAFD (Car Function Data Description) files.
According to developers at ESysUltra , version (along with 3382, 3353, and 3340) is now deprecated .