Toyota 4Runner 4.0 1GR-FE Firmware 89663-35343
Catalog details for Toyota 4Runner 4.0 1GR-FE firmware 89663-35343 and its engine-control module family.
89663-35343 is a Toyota calibration identifier associated with an engine control module (ECM) for the 4Runner 4.0-liter 1GR-FE V6. The ECM manages engine operation by interpreting sensor signals and controlling functions such as fuel delivery and ignition timing.
What this identifier tells you
The catalog filename 4Runner 4.0 1GRFE 89663-35343.bin identifies a firmware file by vehicle, engine and calibration number. The 89663 number family is associated with Toyota engine-control software. The identifier alone does not establish a specific drivability change or a particular model-year application.
No stock or modified variant label is included in the filename. The file is therefore identified by its calibration number rather than by a named feature or tuning change.