As I suspected, they didn't change it. At one point they listed they were changing the bar graph part to red (still not sure why). It's probably better off this way so there are only two different gauge clusters (CVT and 5 speed) rather than 4 thus driving the price of each up higher.
That's true too. 00 and 01 have a 8 wire sensor pre cat and a 4 wire post cat. 02 and later have a 4 wire pre cat, a 4 wire post cat and another 4 wire post NOX (this is from memory, don't hold me to it). I was told this was a 02 and later emissions requirment so if that's true you should find it on any 02 and newer car.
Having a near zero intelligence when it comes to stuff like Nox sensors, would there be any difference in any performance issues then between the 00/01 and the newer ones? Mpg? Or is it a tad more/less polluting?