Near the end of the film, when Jeff Bridges is Racing through the streets in a metallic red car, They used Two completely different models of the same car. So blindingly obvious a sacking should have been ordered!
In regards to the Ford Contour (car) issue, the guy who came up with that slip up should be shot. There is no slip up. The original Ford Contour is a 95-97 model whereas the alternate contour is the same color, but a 98-00 model. The significance of the switch is that it occurs as Tim Robbins is fighting Jeff Bridges in the abandoned building. Watching the movie for the first time, I noticed that right off the bat, and immediately assumed the bomb was in the contour. The crew for this film paid a lot of attention to detail. Vote 10 if you think the guy that came up with the original car slip-up should go home and watch the movie again!