EDITED
So, the normal car door's Rear sprite is clearly incorrectly rotated. Since their "open" sprite is still in the way. Same goes for opaque doors, rear sprite is facing the wrong way.
NOTE: I have Debug Clairvoyance on this screenshot. You cant see through opaque doors normally. But still, the sprite proves itself.
EDITED So, the normal car door's Rear sprite is clearly incorrectly rotated. Since their "open" sprite is still in the way. Same goes for opaque doors, rear sprite is facing the wrong way.
NOTE: I have Debug Clairvoyance on this screenshot. You cant see through opaque doors normally. But still, the sprite proves itself.