Toyota 4Runner 3.4 Firmware 89663-35130_ST1_E2 SV 4000 p.
A catalog overview of Toyota 4Runner 3.4L 5VZ-FE engine firmware 89663-35130_ST1_E2 SV 4000 p. and its variant labels.
89663-35130_ST1_E2 SV 4000 p. is cataloged as engine-control firmware for a Toyota 4Runner with the 3.4-liter 5VZ-FE engine. The 89663-35130 identifier belongs to the Toyota engine-control software part-number family.
The engine control module uses its calibration to manage functions such as fuel delivery and ignition timing in response to engine operating conditions. These controls affect starting, drivability, emissions and fuel consumption. The catalog name does not establish which engine-control settings this particular file changes.
Understanding the variant name
The filename identifies this entry as an ST1_E2 variant and also includes SV 4000 p.. Those labels distinguish it from the related 89663-35130 catalog entry, but their exact meanings are not established by the names alone. In particular, the filename does not reliably identify the function associated with SV 4000 p. or whether the variant is stock or modified.
For identification, the complete filename matters: the base software number ties the entry to the engine-control calibration family, while the suffix identifies the particular cataloged variant.