Factual error: There are a few scenes in the movie which show Christine locking her doors and we see that she has common lock "buttons" on the inside door panels. This is incorrect - 1958 Plymouths are not equipped with buttons. To lock the door, the door handle has to be rotated counter-clockwise. (00:48:15)
Factual error: When Christine is about to crush Moochie you see the car is a few inches wider than the entrance to the loading dock. Even a small box truck that you can rent is 7'3" wide so that opening would have to be wider than that for the truck to back in. A 1958 Plymouth Fury is only 6'6" wide. Christine would have had plenty of room to just drive in and crush Moochie. (01:45:45)
Factual error: When Arnie goes to visit Dennis in the hospital, on Thanksgiving, the date November 23 is shown just before the camera pans across the TV which is on and it shows the Oakland Raiders playing the Detroit Lions. That year the Lions played the Broncos on Thanksgiving. Three days later, on Sunday, the Raiders played the Seattle Seahawks. That Season though the Lions did play the Raiders on November 19, which would have been 4 days before.