Toyota 89663-60491 Stock Firmware
A catalog reference for Toyota firmware 89663-60491 stok.bin and its stock variant label.
89663-60491 stok.bin is a stock-labeled Toyota firmware file identified by calibration code 89663-60491. The spelling stok indicates a stock variant rather than a named modification.
Controller family and application
The Toyota 89663 part-number family is associated with engine control software. Its tentative association is therefore with an engine control module, which manages engine operation using sensor inputs and programmed control strategies.
The identifier alone does not establish the exact vehicle application or the changes included in this calibration. The related catalog entry repeats 89663-60491 without naming a vehicle, controller or modified feature.