Lexus RC300 and RC350 89663-24571 Engine Firmware
A catalog reference for Lexus RC300 and RC350 2GR-FKS engine firmware identified as 89663-24571.
89663-24571 is a Toyota/Lexus engine-control calibration identifier cataloged for the Lexus RC300 and RC350 with the 3.5-liter 2GR-FKS V6. It belongs to the engine control module software family, which manages engine operation and emissions-related functions.
Engine-control role
The engine control module uses sensor inputs and calibration data to control functions such as fuel injection, ignition timing and electronic throttle operation. These controls influence how the V6 responds to the accelerator, runs under changing loads and meets emissions requirements.
The complete identifier 89663-24571 distinguishes this calibration from other Toyota and Lexus engine software records. The catalog entry does not identify a particular drivability correction, bulletin update or modified feature for this revision. It also does not establish fitment for every RC300 or RC350 equipped with a 2GR-FKS engine.