Toyota RAV4 2.0 3ZR-FAE 89663-42B82_ST1_E2 SV2 4000 Firmware
A catalog guide to Toyota RAV4 2.0 3ZR-FAE engine firmware 89663-42B82 and its ST1, E2 and SV2 4000 variant labels.
89663-42B82_ST1_E2 SV2 4000 is cataloged for the Toyota RAV4 2.0 with the 3ZR-FAE engine. The 89663-42B82 identifier belongs to Toyota’s engine control calibration part-number family. The engine control module uses calibration data to manage functions such as fuel delivery, ignition timing and emissions-related operation.
In practice, those controls help the engine respond to the accelerator while operating across different speeds, loads and temperatures. The catalog identifier associates this entry with engine-management software, but it does not establish the exact changes made by this particular calibration.
Reading the variant name
The related catalog entry 89663-42B82 gives the base identifier. The longer name adds ST1_E2 SV2 4000, which appears to designate a modified variant rather than a stock calibration. ST1 commonly denotes Stage 1 tuning, while E2 is often used as an emissions-related modification label. The precise meaning of SV2 4000 and the behavior of these labels cannot be confirmed from the filename alone.
The variant labels belong to the longer filename and should not be assumed to describe every file carrying the base 89663-42B82 identifier. Vehicle and calibration details should be checked against the actual control module when identifying a particular RAV4.