The 2004 World Series by Nissan was contested over 9 race weekends/18 rounds. In this one-make formula all drivers had to utilize Dallara chassis (Dallara SN01) and Nissan engines (Nissan VQ). 11 different teams and 31 different drivers competed.[1] Heikki Kovalainen claimed the title for Pons Racing, finishing tenth in first race at Circuit Ricardo Tormo.[2]