In August 2003, Nissan unveiled Dunehawk Concept and showcased it at the IAA 2003 in Frankfurt (R51 design patents filed 8 September 2003), previewing the next Pathfinder's design. At the 2004 North American International Auto Show, Nissan unveiled a completely redesigned Pathfinder for the 2005 model year. The new R51 Pathfinder uses the Nissan F-Alpha platform, thus returning to a body on frame construction.