Originally Posted by Angelus911
Well considering all Imprezas were built as PZEV starting earlier this year, I would think it would apply to all of them.
Perhaps this update is only for PZEV states, though. Either way seems like a handy update to have at some point, knowing whether or not the car is at the right running temp.
When is considered 'earlier this year'? My car was built in March and it's not PZEV.