It looks like it attaches to the rear of the center console (not the seats) I think you may have to buy an entire rear section (if not the entire center console) to adapt an armrest. I will have to go see a '02 first hand this week.
according to the lexus dealers here in s. cal (who knows if you can trust them or not) the armrest is not retro-fittable to earlier cars. something to do with the way the arm rest attaches.
Community dedicated to Lexus IS Enthusiasts. Come in and enjoy our articles, galleries and information on aftermarket parts for the IS300, IS250, IS350.