2003 Stock Car Brasil season
was the 27th Stock Car Brasil season. It began on March 23 at the Curitiba and ended on November 30 at Interlagos, after twelve rounds.
Teams and drivers
All cars used Chevrolet Vectra Stock Car chassis. All drivers were Brazilian-registered.| Team | Driver | Rounds | |
| Petrobras-RS | 0 | Cacá Bueno | All |
| Petrobras-RS | 4 | Popó Bueno | All |
| JF-Filipaper Racing | 1 | Ingo Hoffmann | All |
| JF-Filipaper Racing | 10 | Sandro Tannuri | All |
| Samsung-Start | 2 | Neto de Nigris | All |
| WB-Texaco | 3 | Chico Serra | All |
| WB-Texaco | 6 | Alceu Feldmann | All |
| A. Jardim Competições | 5 | Adalberto Jardim | All |
| FulmInset-Action Power | 7 | Thiago Marques | 1–3, 5–12 |
| Carlos Alves Competições | 8 | Carlos Alves | All |
| Medley-A.Mattheis | 9 | Xandy Negrão | 4, 6–7, 9, 12 |
| Medley-A.Mattheis | 15 | Antonio Jorge Neto | All |
| Medley-A.Mattheis | 27 | Guto Negrão | All |
| Scuderia 111 | 11 | Nono Figueiredo | All |
| Vogel Motorsport | 13 | André Bragantini | All |
| Vogel Motorsport | 99 | Gualter Salles | All |
| Scuderia Lobo | 21 | Thiago Camilo | All |
| Manzini Competições | 22 | Paulo Gomes | 9–12 |
| Manzini Competições | 88 | Beto Giorgi | 7–8 |
| Itupetro-RC | 9 | Giuliano Losacco | All |
| Itupetro-RC | 25 | Ricardo Etchenique | 10 |
| Itupetro-RC | 25 | Luiz Paternostro | 1–9, 11 |
| Katalogo Racing | 32 | Paulo Yamamoto | 12 |
| Katalogo Racing | 37 | Fernando Correa | 1–4, 6–12 |
| Katalogo Racing | 73 | Claudio Capparelli | 2–3 |
| Katalogo Racing | 88 | Beto Giorgi | 1–6 |
| Nascar Racing | 33 | Ricardo Etchenique | 1–2, 6 |
| Nascar Racing | 72 | Hélio Saraiva | 1–3, 5–6 |
| Nascar Racing | 77 | Aloysio de Andrade | All |
| Nascar Racing | 88 | Beto Giorgi | 9–12 |
| Famossul Motorsport | 34 | Matheus Greipel | All |
| Repsol-Boettger | 35 | David Muffato | 1–5, 7–12 |
| Repsol-Boettger | 35 | Felipe Maluhy | 6 |
| Repsol-Boettger | 36 | Raul Boesel | All |
| Giaffone Motorsport | 43 | Pedro Gomes | All |
| Giaffone Motorsport | 44 | André Giaffone | All |
| Massageol-Hot Car | 45 | Giuseppe Vecci | All |
| Salmini Racing | 56 | Sergio Paese | All |
| Salmini Racing | 57 | Rodney Felicio | 1, 3, 5–6, 9–12 |
| Salmini Racing | 57 | Paulo Yamamoto | 8 |
| Diretriz Racing | 74 | Duda Pamplona | All |