Prado 120 89663-60501 36050100 MOD EGR_off Firmware

89663-60501 36050100 MOD EGR_off v1 INT.bin is cataloged as a modified Denso engine-control firmware file for a 2006 Toyota Land Cruiser Prado 120 with a 3.0-liter diesel engine, automatic transmission and a listed output of 166 hp. Its named modification concerns exhaust gas recirculation, or EGR, which routes a controlled amount of exhaust gas back into the intake to reduce nitrogen oxide emissions.

Engine control and EGR operation

The engine control module uses sensor inputs and calibration tables to manage diesel engine operation, including fuel delivery and emissions-related functions. During normal EGR operation, the controller commands recirculation under suitable operating conditions. Returning exhaust gas to the intake reduces combustion temperatures and helps limit nitrogen oxide formation.

The filename label MOD EGR_off identifies this file as a modified variant intended to disable EGR operation in software. In practice, that changes how the engine controller manages recirculation compared with an EGR-enabled calibration. The filename alone does not establish the exact calibration changes, whether diagnostic fault reporting was altered, or how the vehicle will behave in every operating condition.

Reading the catalog identifier

The related catalog entry 89663-60501 identifies the Toyota engine-control software part-number family associated with this file. The additional 36050100 identifier and the vehicle description distinguish the listed calibration from other engine firmware records. v1 denotes a version label for the modified file, while INT appears in the filename without a stated definition.

The EGR-off label applies to this modified filename. It should not be taken as a description of an unmodified Toyota calibration. Disabling an emissions-control function can affect emissions compliance and may be restricted for road vehicles in many jurisdictions.