2003 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine_ | Tyre | Driver | Rounds | Free_Practice_drivers |
|---|---|---|---|---|---|---|---|
| Scuderia Ferrari Marlboro | Ferrari | F2002 F2003-GA | Ferrari 051 Ferrari 052 | B | Michael Schumacher | All | N/A |
| Scuderia Ferrari Marlboro | Ferrari | F2002 F2003-GA | Ferrari 051 Ferrari 052 | B | Rubens Barrichello | All | N/A |
| BMW WilliamsF1 Team | Williams - BMW | FW25 | BMW P83 | M | Juan Pablo Montoya | All | N/A |
| BMW WilliamsF1 Team | Williams - BMW | FW25 | BMW P83 | M | Ralf Schumacher | 1–13, 15–16 | N/A |
| BMW WilliamsF1 Team | Williams - BMW | FW25 | BMW P83 | M | Marc Gené | 14 | N/A |
| West McLaren Mercedes | McLaren - Mercedes | MP4-17D | Mercedes FO110M Mercedes FO110P | M | David Coulthard | All | N/A |