When Jackie and the others are chased by the gangsters, they hit the cars with their rear bumper; the bumpers deform. Then in the next shot, the bumpers are okay again.
When the yellow Mitsubishi van makes a huge jump, the van is changed to another van (an older type).
When the van gets a flat at the insane asylum the wheel being removed is a 5-nut one and when the camera cuts to the brakes it is showing 4 nuts.
When two Peugeot's 504 are involved in a chase, one of them is driving on two wheels. The ramp that causes this is visible in the background.