Toyota and Lexus Firmware 3YWF9501.cuw

3YWF9501.cuw is a Toyota or Lexus firmware catalog identifier. The complete identifier is the distinguishing detail for this entry, but it does not establish a specific control module, vehicle system, or software function on its own.

The .cuw filename extension identifies the entry as a firmware file. It does not, by itself, indicate which vehicle it fits or what a particular software revision changes.