Toyota 89663-42T00 Firmware for the 2019 RAV4

Toyota 89663-42T00 is a calibration identifier associated with the 2019 RAV4. Its full calibration ID, 8966342T0000, appears as an updated calibration in Toyota service bulletins T-SB-0107-19 and T-TCI-5267.

Controller family and application

The 89663 part-number family is generally associated with engine control software. An engine control module uses calibration data to manage functions such as fuel delivery, ignition and emissions control. On some vehicles, the engine and transmission controls also coordinate power delivery.

That family association is tentative for this specific entry. The available bulletin records identify the calibration as updated but do not state the controller or the condition addressed. They therefore do not establish which operating behavior changed in 8966342T0000.

Both records name the 2019 Toyota RAV4. The complete calibration ID is important when comparing service information, since a similar 89663 prefix alone does not identify the same software revision or confirm compatibility.