My MY02 S2000 came with 2 Key Fobs. My MY01 came with only 1. I needed 2 fobs for the MY01 so I reprogrammed 1 of the MY02's fobs to work for the MY01. Now, the fob I reprogrammed works with both S's. Every function works on either, and if the S's are parked close together (which they usually are) it'll do whatever button I push on both S2000's. Pretty cool!

 

Interesting to know.

Not too surprising though since the car is programmed to the FOB, not the other way around.