Toyota and Lexus Firmware 89663-60731-_MOD.bin
A catalog reference for Toyota and Lexus firmware identifier 89663-60731-_MOD.bin and its modified-file label.
89663-60731-_MOD.bin is a modified binary file associated with the Toyota and Lexus calibration identifier 89663-60731. The 89663 part-number family is generally associated with engine control software, so this file is tentatively linked to an engine control module (ECM).
An ECM uses software calibrations to manage engine operation, including fuel delivery, ignition timing and emissions-related functions. The identifier alone does not establish which of those functions this particular file changes.
What the MOD label means
The _MOD suffix identifies the file as a modified variant. It does not name a specific modification or show how the file differs from stock software. The related catalog entry 89663-60731 shares the base identifier, but does not describe a vehicle application or the contents of the modification.