Toyota Lexus Firmware 89663-60B03 (2).bin
A catalog reference for Toyota or Lexus firmware 89663-60B03 (2).bin and its calibration identifier.
89663-60B03 (2).bin is a firmware file cataloged under the Toyota or Lexus calibration identifier 89663-60B03. The 89663 part-number family is associated with engine control software, making an engine control module application plausible, though the exact vehicle and function are not established by this identifier alone.
An engine control module uses calibration data to manage engine operation, including fuel delivery and ignition timing. That general role does not establish what this particular calibration changes or which engine it controls.
The related catalog entry repeats 89663-60B03 without a vehicle, controller or variant description. The (2) in the filename is a file label, not evidence of a specific software revision or modification.