When Leigh falls off the hanging tire while trying to escape from Christine, she gets off the ground and her hair is messy and in her face. A few moments later, when against the wall, her hair is perfectly neat again.
At the the end of the film, Dennis uses the Caterpillar tractor to ram Christine. He also immobilizes the car by dropping the teeth of the loading bucket into the roof. Then we see close-ups of the car repairing itself completely. The next shot, just before the tractor starts to crush the car, shows the car in its previous smashed-up condition again.
When Christine is crushed and dropped from the junkyard crane, the side facing Dennis, Leigh and Junkins shows a steel wheel very prominently. As they talk, they are looking right at it, and when the shot returns to the cube, the wheel is gone, replaced by Christine's mangled grillwork and front bumper- as if the cube has spun 180 degrees. The viewing angle is unchanged, evidenced by the crane's tread belts and the area in the background, and if the cube were 'morphing', the 3 characters would have seen it and reacted.
When Arnie takes Leigh back home, he switches off the windshield wipers when they're on the outside of the windshield. When he comes back to Christine a few minutes later, the wipers are in their normal position.
At the gas station that explodes, a car is lifted high in the left service bay, but is down on the floor when the building explodes. To try and fix this continuity error, a quick close-up shows the controls for the right bay's lift as Christine shoves the Camaro inside the right bay, smashing those controls. This should have no effect on the left lift (each lift is completely independent for safety), yet two quick close-ups (of the blonde guy, then his feet) show the car on the left is now coming down. But long before it could have traveled all the way down, the next shot is from outside as the building explodes with the car firmly on the floor.
On Thanksgiving Day, November 23, 1978, we see the Oakland Raiders playing a football game on the television set in Dennis's hospital room. In reality, the Raiders did not play on that day. The two NFL games that were played that day were: Denver Broncos vs. Detroit Lions and Washington Redskins vs. Dallas Cowboys.
When Dennis is in the hospital, the date reveals it to be Thanksgiving day. The football game on the TV is between the Lions and Raiders. Those two teams have played on Thanksgiving, but the game here shows the Lions in their road jerseys. The Detroit Lions ALWAYS play at home on Thanksgiving.
The small wheels that are visible under the car that Christine crashes into during the showdown at Darnell's is not a goof. Vehicles that won't run or have no engine are often put on this type of dolly to allow them to be moved around with ease.
The film is set in 1979 but George Thorogood's Bad to the Bone wasn't released until 1982. However, the song is not meant to take place in the movie, simply for it like an original motion picture soundtrack.
Buddy steps on Arnie's glasses and clearly breaks them. After Mr. Casey breaks up the fight Arnie puts on his glasses, which appear to be undamaged. He's really just wearing the bows without the glasses themselves.
When Christine smashes into the silver Camaro at the gas station, the hood of the Camaro gets knocked off the hinges and twisted sideways. As Christine reverses and drags the Camaro backward, you can see down through the hood that the engine compartment is empty. Minus a transmission, as well.
When Moochie is running from Christine he briefly loses sight of her. He stops running, turns around and takes a few steps backwards while glancing down to make sure he stops at the spot they marked for him.
As Christine rolls off the assembly line at the factory she is painted bright red with a white roof. Twenty years later when Arnie first bought her, the paint is badly faded and rusted but the color of her roof is the same faded red as the rest of the car. Only after her partial restoration does her top become white again.