Toyota Firmware 89663-42B43: Calibration Catalog Reference
A concise catalog reference for Toyota firmware identifier 89663-42B43 and its control-module part-number family.
89663-42B43 is a Toyota firmware calibration identifier in the 89663 part-number family, which is associated with engine and powertrain control software. Its exact vehicle application and the function changed by this calibration are not established here.
Powertrain control software generally uses engine and vehicle sensor inputs to manage functions such as fuel delivery and ignition timing. That family-level role does not establish which settings or operating behavior are specific to 89663-42B43.
The complete identifier matters when comparing calibration records. A similar 89663 number is not enough to establish the same application, revision or compatibility.