Toyota and Lexus Firmware 89663-YWG31
Catalog reference for Toyota and Lexus calibration identifier 89663-YWG31 and its associated firmware filenames.
89663-YWG31 is a Toyota or Lexus automotive firmware calibration identifier listed in two binary catalog filenames: 89663-YWG31.bin and 89663-YWG31-.bin.
The 89663 part-number family is associated with engine control module calibration software. That association is tentative for this specific identifier: the filenames do not establish its vehicle application or the function controlled by this calibration.
Catalog variants
Both filenames carry the same complete identifier. The trailing hyphen in 89663-YWG31-.bin does not, by itself, identify a stock or modified version or describe a functional change.