Plot hole: They discover a "not so well hidden" microphone in the car that tells them the "man" is listening to them, but it is ignored throughout the rest of the movie, especially when setting up a video loop to cover their extracurricular activities. (00:30:00)
Continuity mistake: In the scene where Selena Gomez and Ethan Hawke were driving through the train station being chased by the last of the thugs on a bike, she says 'look out', and shortly after that, the side mirror on the passenger side of the car was knocked of when the car scrapped against the side walk and was shown in several shots following that to have been detached from the car. But subsequently after the chase was over, the side mirror magically reappears, attached to the car.
Factual error: Throughout the movie in the car they are ramming into things such as the water truck and other cars, yet the car suffers no damage. No way would the car still be running after all of that. The water truck rear end would have decommissioned it.
Continuity mistake: The entire passenger side of the Shelby is scratched and scraped, but when they are going through the tunnel near the end, both sides of the Shelby are perfectly fine.
