Toyota and Lexus 89663-60A31_STOK.bin Firmware
A catalog reference for Toyota and Lexus firmware 89663-60A31_STOK.bin and its calibration identifier.
89663-60A31_STOK.bin is a stock-labeled firmware file associated with Toyota or Lexus calibration identifier 89663-60A31. The related catalog entry uses the same identifier without the file extension or variant label.
Controller family and catalog label
The 89663 part-number family is commonly associated with Toyota engine control module calibration software. That makes an engine-control application plausible for this file, but the identifier alone does not establish its exact controller, vehicle application or software function.
The STOK suffix indicates a stock variant in the filename. It does not identify a specific modification or describe a change in vehicle behavior. No named modified variant is associated with this catalog entry.