Toyota and Lexus Firmware 89663-FOL62
A catalog reference for Toyota and Lexus firmware identifier 89663-FOL62 and its calibration-number family.
89663-FOL62 is a Toyota or Lexus calibration identifier in the 89663 part-number family, which is associated with engine control software. That family association is tentative for this exact identifier, so it does not establish a specific vehicle application or a particular software change.
Engine control software generally helps manage functions such as fuel delivery, ignition timing and emissions control. The identifier alone does not show which of those functions this calibration changes, or whether it represents stock or modified software.