When Ponch is driving the getaway car in the first heist scene, it's shown as a Chevy SS right up until they arrive at the docks. As he's about to torch the getaway car, the car changes to a Chevy Malibu.
When Ponch and Baker go to TJ's second home (0:51:38), TJ and Barton's drivers license are shown to them, you can notice clearly that David Barton's Drivers License shows an error in his Date of Birth (DOB), it says 41/21/1976. It was probably supposed to read 01/21/1976 or 11/21/1976.
Early in the film, Baker mentions that his right humerus (right upper arm) is titanium. At the end of the film, though, bullets are fired at him and they strike his left arm, causing one to ricochet and kill the villain.
When the truck hits Ponch's motorcycle and drags it (right after Baker jumps and pulls Ponch to safety), the aerial shot shows two CHP bikes on the side of the road. Also after Baker punches Ponch and rides away, the front of the second bike can be seen in the shot again.