Toyota and Lexus Firmware 89663-FA350
A catalog reference for Toyota and Lexus firmware identifier 89663-FA350 and its engine-control calibration family.
89663-FA350 is a Toyota-format electronic control module calibration identifier. The 89663 part-number family is generally associated with engine control software, so this entry is tentatively connected with the engine control module and its management of engine operation.
What the calibration identifies
An engine control module uses sensor inputs to manage functions such as fuel delivery, ignition timing and emissions control. The complete identifier 89663-FA350 distinguishes this calibration from other entries in the same part-number family, but the identifier alone does not establish the vehicle application or a specific software change.
The family’s general role should not be taken as evidence that this particular calibration changes a named driving feature or corrects a particular fault.