Toyota Firmware 89663-37731
A catalog reference for Toyota firmware identifier 89663-37731 and its engine control calibration family.
89663-37731 is a Toyota engine control calibration identifier in the 89663 part-number family. This family is associated with software used by the engine control module, which manages engine operation using sensor inputs and programmed control strategies.
The complete identifier distinguishes this calibration from other Toyota engine control software. It does not, by itself, establish a specific vehicle application, engine variant, or change introduced by this revision.