Toyota Firmware 89663-3A100: Calibration Catalog Reference
A concise reference to Toyota firmware identifier 89663-3A100 and its automotive calibration part-number family.
89663-3A100 is a Toyota automotive software calibration identifier in the 89663 part-number family. Identifiers in this family are associated with electronic control unit calibrations, but the full number alone does not establish which vehicle system this particular calibration controls.
What the identifier tells you
The complete code distinguishes this calibration from other Toyota firmware records with a similar prefix. A vehicle model, controller designation, catalog filename or service bulletin would be needed to connect 89663-3A100 to a specific application or documented software change.