Toyota and Lexus Firmware 89663-50132: ECU Calibration

89663-50132 belongs to Toyota’s 89663 engine control software part-number family. The family is associated with engine ECU calibrations that govern engine operation, including fuel delivery and ignition timing. The exact vehicle application and the specific changes in this calibration are not established by the catalog filenames.

Catalog file variants

The catalog includes 89663-50132.bin and two numbered copies, 89663-50132 (2).bin and 89663-50132 (3).bin. The numbering distinguishes filenames, but does not establish whether their contents differ.

89663-50132-_MOD.bin is labeled as a modified variant. 89663-50132-_MOD_E2.bin and SW#89663-50132- MOD_E2.bin carry the additional E2 label. The filenames do not define what either modification changes, so the labels alone do not establish a particular performance or emissions-related function.