Toyota Firmware 89663-40131: Control Module Catalog Reference
A concise reference to Toyota firmware identifier 89663-40131 and its calibration-number family.
89663-40131 is a Toyota calibration identifier in the 89663 part-number family, which is associated with engine control software. The exact vehicle application and the functions changed by this calibration cannot be established from the identifier alone.
Engine control software generally manages how the engine responds to operating conditions, including functions such as fuel delivery and ignition timing. That describes the controller family’s role, not a confirmed feature or change in 89663-40131.
The complete identifier is important when comparing service records or calibration catalogs. A similar prefix does not establish that two calibrations serve the same vehicle or are interchangeable.