Toyota RAV4 Hybrid 89663-42N91 Firmware
Catalog reference for Toyota RAV4 2.5L Hybrid 2AR-FXE firmware 89663-42N91 and its engine-control role.
89663-42N91 is a Toyota engine-control calibration identifier associated in this catalog with the RAV4 2.5-liter hybrid and its 2AR-FXE gasoline engine. The file is listed as 89663-42N91.bin.
Engine control in the hybrid system
The Toyota 89663 part-number family is associated with engine control module software. In a hybrid vehicle, the engine controller manages functions such as fuel injection, ignition and electronic throttle operation while coordinating engine operation with the hybrid control system. This coordination helps the gasoline engine deliver power when the vehicle needs it and shut down when hybrid operation allows.
The catalog identifies the engine and calibration but does not establish a specific change made by revision 89663-42N91. It also does not label the file as a stock or modified variant. The complete identifier is therefore most useful as a calibration reference when comparing it with a vehicle’s existing software record.