Toyota and Lexus Firmware 89663-OW012
A catalog reference for Toyota and Lexus firmware identifier 89663-OW012 and its calibration number family.
89663-OW012 is a Toyota-format software calibration identifier. The 89663 part-number family is associated with powertrain electronic control unit calibrations, which can govern how an engine or hybrid powertrain responds to operating conditions.
That family association is tentative for this exact identifier. The complete code does not reliably establish a particular vehicle, controller, or software function, and it does not by itself identify a change made by this revision.
Using the identifier in a service record
The complete calibration ID is useful when comparing a controller’s recorded software with a vehicle-specific service document. A matching prefix alone is not enough to establish that another calibration has the same application or behavior.