| 2003 motorsport champions | |
| Previous: 2002 | Next: 2004 |
This list of 2003 motorsport champions is a list of national or international auto racing series with a Championship decided by the points or positions earned by a driver from multiple races.
| Series | Driver | Season article |
|---|---|---|
| American Le Mans Series | LMP900:  Frank BielaLMP900: Marco Werner
|
2003 American Le Mans Series season |
LMP675:  Chris Dyson
| ||
GTS:  Ron FellowsGTS: Johnny O'Connell
| ||
| GT: Lucas Luhr GT: Sascha Maassen
| ||
| Rolex Sports Car Series | DP: Terry Borcheller
|
2003 Rolex Sports Car Series season |
| SRPII: Steve Marshall
| ||
| GTS: Tommy Riggins GTS: Dave Machavern
| ||
| GT: Cort Wagner GT: Brent Martini
| ||
| FIA Sportscar Championship | SR1:  Jan LammersSR1: John Bosch
|
2003 FIA Sportscar Championship season |
| SR1 Teams: Racing for Holland
| ||
SR2:  Mirko SavoldiSR2: Piergiuseppe Peroni
| ||
| SR2 Teams: Lucchini Engineering
| ||
| FIA GT Championship | GT: Thomas Biagi GT: Matteo Bobbi
|
2003 FIA GT Championship season |
| GT Teams: BMS Scuderia Italia
| ||
N-GT:  Stéphane OrtelliN-GT: Marc Lieb
| ||
| N-GT Teams: Freisinger Motorsport
|
| Series | Driver | Season article |
|---|---|---|
| European Touring Car Championship | Overall: Gabriele Tarquini
|
|
| Manufacturers: BMW
| ||
| Independents: Duncan Huisman
| ||
| V8 Supercars |  Marcos Ambrose
|
2003 V8 Supercar Championship Series |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship |  Petter Solberg Phil Mills
|
2003 World Rally Championship season |
| Manufacturer: Citroën
| ||
| Junior World Rally Championship | Brice Tirabassi
| |
| Production World Rally Championship | Martin Rowe
|
