Toyota Firmware 89663-26B11: Calibration Catalog Reference
A concise reference to Toyota firmware identifier 89663-26B11 and its place in the 89663 calibration-number family.
89663-26B11 is a Toyota electronic control calibration identifier in the 89663 part-number family. That family is associated with engine control software, although the complete identifier alone does not establish the exact vehicle application or the behavior of this calibration.
What the identifier tells you
An engine control module uses calibration data to govern functions such as fuel delivery, ignition timing and emissions control. Those are general functions of the controller family, not confirmed changes made by 89663-26B11.
The full identifier is important when comparing calibration records. A similar 89663 number does not establish that two files have the same application or are interchangeable.