Toyota and Lexus Firmware 89663-11171
A catalog reference for Toyota and Lexus calibration identifier 89663-11171 and its likely engine-control module family.
89663-11171 is a Toyota calibration identifier in the 89663 part-number family, which is associated with engine control module software. Its association with engine control is tentative because the exact application is not established by the identifier alone.
What the controller family does
An engine control module uses sensor inputs to manage engine operation, including fuel delivery and ignition timing. Its calibration contains the settings used to control those functions under different operating conditions.
The identifier does not establish which vehicle or engine uses this calibration, or what changes this particular revision makes. Those details require a matching vehicle or service record.