Lexus LX470 2UZ-FE 89663-60652 SAP OFF Firmware
Explore Lexus LX470 2UZ-FE firmware 89663-60652, including the SAP OFF label, secondary air injection and CRC status.
89663-60652 is an engine control calibration identifier associated here with the Lexus LX470 and its 2UZ-FE V8. The catalog filename identifies this 736 KB firmware variant as SAP OFF FULL, indicating a modified file intended to disable the secondary air injection function.
What SAP OFF means for the LX470
Secondary air injection helps reduce exhaust emissions during cold starts. The system supplies fresh air to the exhaust, helping unburned hydrocarbons oxidize while the catalytic converters warm up. The engine control module manages this operation and monitors the system for faults.
In this filename, SAP OFF denotes a variant intended to remove that function from the engine-control software. It is not a description of normal stock operation. The label alone does not establish exactly which control routines or diagnostic checks were changed.
Understanding the firmware label
The 89663-60652 identifier places the entry in Toyota’s engine-control calibration numbering family. The broader filename adds the Lexus LX470, 2UZ-FE engine and the modified SAP OFF designation, distinguishing this file from a stock calibration reference.
FULL describes the file as a full firmware image, while 736kb states its catalog size. CRC OK indicates that the file is labeled as having a valid checksum. That label does not by itself establish vehicle compatibility or verify the specific software changes.
Secondary air injection faults can involve components such as the air pump, valves, wiring or passages, as well as the control system that monitors them. Disabling the function changes emissions-system behavior and may be subject to local road-use and emissions rules.