Corrected entry: During the chase scene, the Mustang's rearview mirror usually shows part of the driver's face, either Bullitt's or his stunt double's. While near the end of the chase on the hill, when we can see the water of the Bay, the Charger can be seen (from within the following Mustang) having a hard time turning left. The Mustang's rearview mirror shows the stunt driver excitedly chewing gum, but Bullitt is not chewing gum.
Corrected entry: Jaqueline Bisset and Steve McQueen are driving in her yellow Porsche on the busy freeway. A grey saloon and 3 red lorries feature behind in the shot. Bisset and McQueen stop the car and get out for a chat on the side of the road. They then get back in and drive off, with same grey car and 3 red lorries behind them!