Apparently it's pretty common. We've had this issue before (years ago) and now it's back. Not sure why we're having issues when none of our neighbors (all of whom leave out multiple cars, trucks RV's etc.) seem to have any trouble. Thinking it's got to do with the brand & how they make their wiring. Last car that got attacked was also an Infiniti. Never had an issue when the old Dakota sat out there & even the Honda we had for a while never got it, tho something tried to build a nest between the grill & radiator/fan shroud.
Have someone coming out next week to see about enclosing the carport to try & protect the car. Would love to add a free standing garage, but it would not be easy due to the way this house was placed on the lot.