Toyota and Lexus Firmware 89663-0DS31
A catalog reference for Toyota and Lexus calibration identifier 89663-0DS31 and its control-module family.
89663-0DS31 is a Toyota-format calibration identifier in the 89663 part-number family, which is associated with engine control software. That family association is tentative for this exact identifier because its vehicle application and controller have not been verified.
Engine control software generally manages operating functions such as fuel delivery and ignition in response to sensor readings and driving conditions. The identifier alone does not establish which functions this particular calibration changes or whether it is a stock or modified variant.
Use the complete identifier, including the 0DS31 suffix, when comparing a calibration with a vehicle’s service information. A similar-looking number does not establish the same application or compatibility.