TheRenault R23 is a F1 car that competed in the 2003 F1 season. The driver lineup were Jarno Trulli and fernando Alonso who replaced Jenson Button who left for BAR. The chassis was designed by Mike Gascoyne, Bob Bell, Tim Densham and John Iley with Pat Symonds overseeing the design and production of the car as executive director of Engineering and Jean-Jacques His leading the engine design.