The 2003 Formula 3 Sudamericana season was the 17th Formula 3 Sudamericana season. It began on 13 April 2003, at Autódromo Internacional Orlando Moura at Campo Grande and ended on 16 November at Autódromo Internacional Nelson Piquet in Brasília. Brazilian driver Danilo Dirani won the title.
Drivers and teams
- All drivers competed in Pirelli-shod.
| Team | No | Driver | Chassis | Engine | Rounds |
|---|---|---|---|---|---|
| Class A | |||||
 Piquet Sports
|
1 | Alexandre Sarnes Negrão
|
Dallara F301 | Mugen-Honda | All |
| Cesário Fórmula
|
3 | Fernando Rees
|
Dallara F301 | Mugen-Honda | 1–6 |
| Marcelo Thomaz
|
Dallara F301 | Mugen-Honda | 7 | ||
| Gustavo Foizer
|
Dallara F301 | Mugen-Honda | 8 | ||
| Alexandre Foizer
|
Dallara F301 | Mugen-Honda | 9 | ||
| 4 | Danilo Dirani
|
Dallara F301 | Mugen-Honda | All | |
| Amir Nasr Racing
|
5 | Juliano Moro
|
Dallara F301 | Mugen-Honda | 1 |
| João Barion
|
Dallara F301 | Mugen-Honda | 2–9 | ||
| 6 | Allan Hellmeister
|
Dallara F301 | Mugen-Honda | All | |
| Avallone Motorsport
|
7 | Lucas di Grassi
|
Dallara F301 | Mugen-Honda | 1–6 |
| Paulo Salustiano
|
Dallara F301 | Mugen-Honda | 7–8 | ||
| Diego Freitas
|
Dallara F301 | Mugen-Honda | 9 | ||
| 8 | Daniel Landi
|
Dallara F301 | Mugen-Honda | All | |
| Bassani Racing
|
9 | Lucilio Baumer
|
Dallara F301 | Mugen-Honda | 1–4 |
| Brasilia Racing
|
11 | Jaime Camara
|
Dallara F301 | Mugen-Honda | All |
| 12 | Zeca Cardoso
|
Dallara F301 | Mugen-Honda | 9 | |
| Dragão Motorsport
|
14 | Hybernon Cysne
|
Dallara F301 | Mugen-Honda | 1 |
| Daniel Scandian
|
Dallara F301 | Mugen-Honda | 2–4 | ||
| Henrique Favoretto
|
Dallara F301 | Mugen-Honda | 5, 7 | ||
| 15 | Alberto Valerio
|
Dallara F301 | Mugen-Honda | 7, 9 | |
| PropCar Racing
|
16 | Henrique Favoretto
|
Dallara F301 | Opel | 1–4 |
| 21 | Eduardo Azevedo
|
Dallara F301 | Opel | 5, 9 | |
| Class B | |||||
| Cesário Fórmula
|
40 | Rodrigo Ribeiro
|
Dallara F394 | Mugen-Honda | 1–8 |
| Gustavo Foizer
|
Dallara F394 | Mugen-Honda | 9 | ||
| 41 | Daniel Lancaster
|
Dallara F394 | Mugen-Honda | All | |
| KTT Racing
|
45 | Paulo Salustiano
|
Dallara F394 | Mugen-Honda | 1–2 |
| Dragão Motorsport
|
46 | Bruno Bari
|
Dallara F394 | Mugen-Honda | 1–6 |
| Salomão Soares
|
Dallara F394 | Mugen-Honda | 9 | ||
| 47 | Paulo Salustiano
|
Dallara F394 | Mugen-Honda | 2–3, 5 | |
| 49 | Vicente Sfeir
|
Dallara F394 | Mugen-Honda | 7–9 | |
| Saul Lui Competicion
|
50 | Thiago de Roure
|
Dallara F394 | Mitsubishi | 2–4 |
| PropCar Racing
|
54 | Fabio Casagrande
|
Dallara F394 | Opel | 1–3 |
| 55 | Eduardo Azevedo
|
Dallara F394 | Opel | 2 | |
| José Larriera
|
Dallara F394 | Opel | 3 | ||
 Werner Competicion
|
69 | Federico Lifschitz
|
Dallara F394 | Mugen-Honda | 3 |
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