Toyota 89663-26336 Firmware Catalog Reference
A catalog reference for Toyota firmware calibration 89663-26336 and its likely engine control software family.
89663-26336 is a Toyota calibration identifier in a part-number family commonly associated with engine control module software. Its tentative association is with the engine ECU, which manages functions such as fuel delivery, ignition timing and emissions control to keep the engine operating as commanded.
The complete identifier distinguishes this calibration from other entries in the 89663 family. The identifier alone does not establish the vehicle application, engine configuration or a specific change made by this revision. Matching a similar prefix is not enough to establish compatibility.