2003 Formula One season Drivers and constructors Drivers and constructors

| Entrant | Constructor_ | Chassis | Engine_ | Tyre | Driver | Rounds | Free_Practice_drivers |
|---|---|---|---|---|---|---|---|
| Jordan Ford | Jordan - Ford | EJ13 | Ford RS1 | B | Zsolt Baumgartner | 13–14 | Zsolt Baumgartner Björn Wirdheim Satoshi Motoyama |
| Jaguar Racing | Jaguar - Cosworth | R4 | Cosworth CR-5 | M | Mark Webber | All | N/A |
| Jaguar Racing | Jaguar - Cosworth | R4 | Cosworth CR-5 | M | Antônio Pizzonia | 1–11 | N/A |
| Jaguar Racing | Jaguar - Cosworth | R4 | Cosworth CR-5 | M | Justin Wilson | 12–16 | N/A |
| Lucky Strike BAR Honda | BAR - Honda | 005 | Honda RA003E | B | Jacques Villeneuve | 1–15 | N/A |
| Lucky Strike BAR Honda | BAR - Honda | 005 | Honda RA003E | B | Takuma Sato | 16 | N/A |
| Lucky Strike BAR Honda | BAR - Honda | 005 | Honda RA003E | B | Jenson Button | All | N/A |