Toyota RAV4 89663-42C72_ST1_E2 SV 3500 Firmware
A catalog overview of Toyota RAV4 2.4 2AZ-FE firmware 89663-42C72_ST1_E2 SV 3500 and its variant labels.
89663-42C72_ST1_E2 SV 3500 is a catalog identifier for Toyota RAV4 firmware associated with the 2.4-liter 2AZ-FE engine. The related base identifier is 89663-42C72.
The Toyota 89663 part-number family is associated with engine control software. Its general role is to manage engine operation through functions such as fuel delivery and ignition timing. The exact changes represented by this file cannot be established from its name alone.
Understanding the variant labels
The suffix ST1_E2 SV 3500 distinguishes this entry from the base catalog identifier. ST1 may denote a Stage 1 modified variant, while E2 and SV 3500 appear to describe additional variant features. Their precise behavior, including what “3500” measures, is not established by the catalog names.
The base identifier and the longer variant name should therefore be treated as separate catalog labels, not as proof that they contain the same calibration or are interchangeable.