The car was based on the same design principles pioneered in the F2002 but taken a step further. The periscope exhausts were smaller and mounted closer to the car's centre line, the rear wing was enlarged and the rear suspension redesigned to reduce tyre wear, a major problem in the F2003-GA. The engine was designed to last a full weekend in accordance with the FIA's technical regulations for the season. As a result, the gearbox also had to be redesigned to be more resilient. The rear end aerodynamics were improved and the car featured a shorter wheelbase. Launch control and fully-automatic gearboxes were also banned for , meaning the driver had to start using the paddle-shifters, and find the effective bite point and release the clutch manually, again. These electronic driver aids had been used by the team for the previous three seasons, since the 2001 Spanish Grand Prix.