Mine is always off by pretty much exactly 45 degress, even when the "accuracy" beam is quite narrow. It's not my car, either. I've walked down the street and it's always off by 45 degress. It has NEVER been lined up correctly. I've tried setting the Compass app to true north and magnetic north. I don't think it affects the rotation in Maps. I haven't tried restoring my phone, I was hoping to avoid that. Has anyone else experienced this?