The 2005 Formula 1 season was the 56th FIA Formula One World Championship, contested over 19 races. Fernando Alonso driving for Renault won his first World Drivers' Championship, becoming at the time the youngest champion in F1 history at age 24. Renault also won the Constructors' Championship. The season was marked by major regulation changes including a single-tire-per-race rule, the dramatic United States Grand Prix tire controversy where only six cars competed, and a fierce title battle between Alonso and McLaren's Kimi Räikkönen.
Giancarlo Fisichella of Renault won the season-opening Australian Grand Prix from pole position, with teammate Fernando Alonso finishing third. The race showcased Renault's early-season dominance under the new regulations.
Fernando Alonso won the Malaysian Grand Prix, taking the lead in the Drivers' Championship. This was the first of multiple victories that would establish Alonso as the championship favorite.
At the European Grand Prix at the Nürburgring, Kimi Räikkönen's McLaren suffered a front suspension failure on the final lap while leading the race, handing victory to Fernando Alonso. The dramatic failure was caused by a flat-spotted tire that caused severe vibrations, a consequence of the new rule requiring tires to last the entire race distance.
The United States Grand Prix at Indianapolis Motor Speedway became one of the most controversial races in F1 history. After Ralf Schumacher's crash in practice was attributed to Michelin tire failures, the seven teams using Michelin tires withdrew from the race after the formation lap. Only six cars (all on Bridgestone tires) competed, with Michael Schumacher winning for Ferrari. The incident severely damaged F1's reputation in the United States.
Fernando Alonso won the German Grand Prix at Hockenheim, further extending his championship lead over Kimi Räikkönen. The victory was Alonso's sixth of the season and demonstrated Renault's consistency across different circuit types.
Fernando Alonso finished third in the Brazilian Grand Prix at Interlagos, securing enough points to become the youngest Formula 1 World Champion in history at age 24, breaking Emerson Fittipaldi's long-standing record. Juan Pablo Montoya won the race for McLaren. Alonso's championship was the first for a Spanish driver and marked Renault's first drivers' title since their return to F1 as a constructor.
Kimi Räikkönen produced one of the greatest drives of his career at the Japanese Grand Prix at Suzuka, starting from 17th on the grid and overtaking Giancarlo Fisichella on the final lap to win the race. The dramatic last-lap pass became one of the most celebrated moments of the season.
The season-ending Chinese Grand Prix in Shanghai saw Fernando Alonso win the race, securing the Constructors' Championship for Renault. The team finished the season with 191 points, ahead of McLaren-Mercedes with 182 points. The race also marked the final Grand Prix for several notable figures and concluded one of F1's most memorable seasons.
