Toyota 89663-60G31 Firmware: Calibration Catalog Reference
A concise catalog reference for Toyota firmware identifier 89663-60G31 and its calibration part-number family.
89663-60G31 is a Toyota calibration identifier in the 89663 part-number family. That family is associated with engine control software, which governs functions such as fuel delivery, ignition timing and emissions-related operation.
The complete identifier alone does not establish the exact vehicle application or the changes contained in this calibration. The engine-control association is therefore tentative, and it should not be treated as a confirmed fitment or revision history.