Toyota and Lexus Firmware 89663-50362: Modified Calibration Files

89663-50362 belongs to Toyota’s 89663 calibration number family, commonly associated with engine control software. The engine control module uses calibration data to manage functions such as fuel delivery and ignition timing. For this identifier, the catalog filenames do not establish the exact vehicle application or the behavior changed by either file.

Modified file variants

The catalog contains 89663-50362-_MOD.bin and 89663-50362-_MOD_E2.bin. Both are labeled as modified files. No stock file is identified in this listing.

The MOD_E2 label distinguishes the second file from the MOD variant, but the name alone does not reliably define what E2 changes. The filenames also do not show which engine-control settings were altered or whether the two files are interchangeable.