Continuity mistake: During the vault chase scene, the vault spins on two separate occasions, tangling the lines in the process. The first time, it is being dragged out of the police station and the second when it destroys half a bank. The lines could not have been untangled, because both times they guys were turning to the right and the vault spins in the same direction.
Revealing mistake: When Brian is racing the GT3RS through the mock up track we have a shot inside while he is doing a hard left. Look at the dash and the speedo on the far left is at 0 while the rev counter in the centre moves. Evidently he was stationary and just revved the car for the shot.
Plot hole: Reyes is the only one able to open his vault in the police station as shown in the movie. All the cash from the cash houses are taken to the vault and we see Reyes arrive to check the money is in the vault. How did the money get in the vault if only Reyes himself can open it? To assume the vault is kept open would be ludicrous as it would defy the whole point of the vault.
Continuity mistake: When O'Connor blocks the bus on the two-lane highway with his vehicle, the bus swerves around his car towards the shoulder, clips the right rear of the car, and breaks the vehicle's rear window. In the next shot, the bus reverses angles, flips over the left rear of O'Connor's car nearest the center line, becomes airborne, and then rolls over and over down the center of the highway. If it had continued on its initial trajectory, it would have crushed his vehicle and continued onto the shoulder.