BMW development/engineering software for coding and flashing F-Chassis (and up) BMWs. This means it is mostly 2009 and up (depending on the model). Think of it like WinKFP and NCS Expert but for the really new cars. It is not related to ISTA at all. ISTA is the dealer service software, while ESYS and other BMW Standard tools programs are BMW engineering programs.
 
With BMW Esys you can program/flash ECUs and encode them. In addition to that E-Sys offers a bunch of editors and viewers for editing the populating with data necessary for that.The architecture of the BMW Esys systems involved in the programming: Esys needs a correct populating with data for programming and encoding. Also necessary is a core program system that provides the services for communication and logistics. 
 
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Before Starting: BMW Remote Support Notice
Please ensure that you have all of the OEM tools and system available for all dealer-based online coding programming jobs; for programming flashing updates, original dealer ICOM Next A or BMW Enet cable is a MUST, also a good stable power supply is always recommended, especially for Porsche, Mercedes, and JLR online ECU programming, for Taycan campaign update PIWIS V41.500.022 is recommended. (Car diagnostic tools involved: BMW ICOM Next a or BMW Esys EsysPlus4.1 or ISTA BMW.