Toyota Lexus SW#89663-60U50-B MOD_E2_sap_off.bin Firmware
A catalog overview of Toyota and Lexus calibration 89663-60U50 and the MOD_E2_sap_off firmware variant.
SW#89663-60U50-B MOD_E2_sap_off.bin is a modified Toyota or Lexus engine-control firmware file whose name indicates that the secondary air injection system has been switched off. The related catalog identifier is 89663-60U50. The filename identifies a modification, but it does not establish exactly how the calibration was changed.
What the SAP-off label means
Secondary air injection, often abbreviated SAP, supplies fresh air to the exhaust during certain cold starts. This helps reduce emissions while the catalytic converters warm up. The engine control module normally manages the system’s operation and monitors it for faults.
The sap_off label describes the intended modified variant, not a feature that can be verified from the filename alone. Its exact effect on pump operation, fault detection and emissions readiness would require examination of the file. Disabling an emissions-control system may also affect road legality and inspection results.
Calibration and variant identifiers
The 89663-60U50 identifier belongs to Toyota’s engine-control calibration numbering family. The full filename adds the -B suffix and the MOD_E2_sap_off variant label. The meaning of E2 and the exact vehicle application are not established by the catalog name.