Toyota 89665-42072 Engine Control Calibration
A catalog reference for Toyota 89665-42072, an engine control calibration identifier in the 89665 part-number family.
89665-42072 is a Toyota engine control calibration identifier in the 89665 part-number family. That family is associated with engine control module software, which helps manage engine operation using inputs such as engine speed, temperature and driver demand.
What the identifier tells you
An engine control module uses calibration data to govern functions such as fuel delivery and ignition timing. These functions affect starting, drivability, fuel consumption and emissions. The identifier 89665-42072 identifies a particular calibration, but the part-number family alone does not establish its exact vehicle application or the changes made in this revision.
When comparing service information, use the complete calibration identifier rather than a similar prefix. A shared 89665 prefix indicates the control-software family, not that two calibrations are interchangeable.