Nissan produces very good vehicle. I owned 5 different Nissan vehicles in the past 15 years. Recently just traded in my pathfinder for an armada. Very good to drive and maintain. I don’t know the size of your harp but my pathfinder 2006 before can lay all the seat down to completely flat back. I was transporting a big 36 strings lever harp and no problem at all. In fact, I can probably fit like 3 lever harps when the seats are down. Check if the seats fold down for 2001.