Honda has had three different plugs in it's years of making vehicles. There is an 83'-85' plug, an 86'-97' plug, and a 98'+ plug. Now I'm not sure about the brand new stuff, I know the new Odyssey's(05'+) needs an antenna adapter. There are no new Honda wiring harnesses out there besides the 98'+, so that would lead me to believe the plugs haven't changed.