2003 South African motorcycle Grand Prix 125cc classification 125cc classification

| Rider | Manufacturer | Laps | Time_Retired | Grid |
|---|---|---|---|---|
| Dani Pedrosa | Honda | 24 | 40:46.694 | 7 |
| Andrea Dovizioso | Honda | 24 | +0.356 | 3 |
| Steve Jenkner | Aprilia | 24 | +0.548 | 6 |
| Youichi Ui | Aprilia | 24 | +0.754 | 1 |
| Pablo Nieto | Aprilia | 24 | +0.839 | 2 |
| Alex de Angelis | Aprilia | 24 | +1.965 | 4 |
| Mika Kallio | Honda | 24 | +13.997 | 8 |
| Lucio Cecchinello | Aprilia | 24 | +14.790 | 11 |
| Masao Azuma | Honda | 24 | +16.790 | 12 |
| Casey Stoner | Aprilia | 24 | +20.649 | 19 |
| Gino Borsoi | Aprilia | 24 | +21.809 | 15 |
| Arnaud Vincent | KTM | 24 | +22.015 | 14 |
| Héctor Barberá | Aprilia | 24 | +23.814 | 13 |
| Simone Corsi | Honda | 24 | +23.871 | 16 |
| Mirko Giansanti | Aprilia | 24 | +24.786 | 9 |
| Gioele Pellino | Aprilia | 24 | +39.565 | 24 |