Toyota Lexus 89663-60C31 Firmware
A catalog reference for Toyota and Lexus calibration identifier 89663-60C31 and its 89663 software part-number family.
89663-60C31 is a Toyota calibration identifier listed in the catalog as 89663-60C31.rar. The 89663 part-number family is associated with engine or powertrain control software, which manages functions such as fuel delivery, ignition timing and emissions control.
That family association does not establish the exact vehicle, control module or operating change for this complete identifier. The catalog entry contains no stock or modified variant label, and it does not identify a specific feature controlled by this revision.
For a calibration comparison, retain the complete identifier 89663-60C31. A similar prefix alone is not enough to establish that another firmware record has the same application.