Just when Nina is about to drive off in the Black Moon after the theft of the cars at the Betsy, she presses various starting buttons on the dash, however it is clear that it is not Nina's hand doing the pressing as her finger nails have suddenly become much shorter than the long nails she displays in almost all of the movie.
About an hour in to the film, when Quint arrives at John's trailer, a beige sedan is parked facing the building. When Ringer's goons throw Quint off the porch a minute later, he lands on the trunk of a differently-shaped and much browner vehicle (that has no back window, presumably for safety reasons). A few seconds later, Quint gets dragged off the hood of the original beige car.
At the beginning, Quint flees with his car while people is firing guns at him. Bullets break rear windshield and left rear lights. Soon after, Quint is waiting in his car, and a rear shot shows rear windshield still broken, but the left rear lights is now intact.
During the opening sequence, Quint runs towards a glass door to escape, however, he clearly stops well short of the door. The ensuing shot is from a side angle of (him) bursting through the glass door in a jumping fashion, as if in one continuous motion.