On the diagnostic tool itself, navigate to > Hex File Sync .
For official updates and the latest versions, you should use the official Bosch diagnostic portals: bosch bajaj hex file sync software download link
: The primary application used for performing software updates on ES200 and ES300 diagnostic tools. Latest Version : 4.003 (as of February 2026). Download Link : Available via Bosch Software Informer Diagnostics Download Manager (DDM) On the diagnostic tool itself, navigate to > Hex File Sync
Check that the file checksum matches the target ECU. Flash: Click "Write" or "Sync" and do not touch the cables. On the diagnostic tool itself