Toyota and Lexus Firmware 89663-60A73 (2).bin
Catalog reference for Toyota and Lexus calibration 89663-60A73 and its automotive firmware filename.
89663-60A73 (2).bin is a Toyota or Lexus automotive firmware file associated with calibration identifier 89663-60A73. The 89663 part-number family is commonly associated with engine control software, so an engine control module association is plausible but tentative for this exact calibration.
Engine control software manages functions such as fuel delivery, ignition timing and emissions-related operation. The catalog identifier alone does not establish which functions this particular revision changes, or which vehicle and engine it fits.
Reading the filename
The related catalog entry lists 89663-60A73 without the filename suffix. The (2) in 89663-60A73 (2).bin distinguishes the displayed filename, but it does not by itself identify a stock or modified calibration or describe a software change.