Toyota 89663-28560 Firmware Calibration

89663-28560 is a Toyota firmware calibration identifier in the 89663 part-number family, which is associated with engine control software. An engine control module uses calibration data to manage functions such as fuel delivery and ignition timing, affecting how the engine runs.

That controller-family association is tentative for this entry. The identifier alone does not establish the exact vehicle application, engine, or behavior changed by this calibration.

Related catalog identifier

The catalog also lists 89663-28560-A. Its suffix distinguishes the related entry, but it does not by itself identify a stock or modified variant or a specific software feature.