I fit it under my rear seats without taking anything apart or removing the old jack. I folded both seats up, layed the jack down as close to the hinges as i could, the wide "footer" part is right on the edge of the pass. side seat, and the very top is sticking out a few inches on the drivers side seat, but not in the way of anything. the seats fold back fine, but you have to pull the top part of the pass. seat forward a bit to realease the bottom part b/c of the footer part of the jack putting so much tension on the bottom part of the seat. But it totally works and no need to get it rusty on top, no need for loss of MPG with unneeded wind drag on top. Either way you do it, just make sure you have it!