Toyota RAV4 2.4L 2AZ-FSE Firmware 89663-42523
A catalog overview of Toyota RAV4 2.4L 2AZ-FSE firmware identifier 89663-42523 and its engine-control context.
89663-42523 is listed as a Toyota RAV4 2.4L 2AZ-FSE firmware identifier. Its 89663 part-number family is associated with Toyota engine-control software, so this entry most likely belongs to the engine control module (ECM). The exact application and revision-specific behavior are not established by the identifier alone.
Engine-control role
The ECM manages engine operation using sensor inputs and calibration data. Its general responsibilities include controlling fuel delivery and ignition timing to support starting, drivability and emissions control. Those are functions of the controller family, not confirmed changes introduced by calibration 89663-42523.
The catalog identifies the engine as a 2.4-liter 2AZ-FSE. It does not name a stock or modified variant, a specific software feature, or a service-bulletin improvement for this file. The full identifier is therefore useful as a catalog reference, but it should not be treated as proof of interchangeability with another RAV4 calibration or ECM.