Toyota 89663-10131 Firmware Catalog Reference
A concise reference for Toyota firmware identifier 89663-10131 and its calibration-number family.
89663-10131 is a Toyota calibration identifier in the 89663 part-number family, which is associated with engine control software. That family association is tentative for this specific entry: the complete identifier alone does not establish the vehicle application or the function of this revision.
What the identifier indicates
Engine control software generally manages functions such as fuel delivery, ignition timing and emissions-related operation. Those are general controller functions, not confirmed changes made by 89663-10131.
The full identifier is important when checking a calibration against a vehicle or service record. A similar 89663 number does not by itself establish that two calibrations have the same application or behavior.