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

| Rider | Manufacturer | Laps | Time_Retired | Grid |
|---|---|---|---|---|
| Thomas Lüthi | Honda | 24 | +42.280 | 22 |
| Fabrizio Lai | Malaguti | 24 | +42.379 | 25 |
| Gábor Talmácsi | Aprilia | 24 | +51.145 | 10 |
| Marco Simoncelli | Aprilia | 24 | +51.186 | 18 |
| Stefano Bianco | Gilera | 24 | +53.316 | 17 |
| Mike Di Meglio | Aprilia | 24 | +55.253 | 30 |
| Emilio Alzamora | Derbi | 24 | +56.952 | 21 |
| Jorge Lorenzo | Derbi | 24 | +57.035 | 20 |
| Álvaro Bautista | Aprilia | 24 | +58.109 | 26 |
| Chris Martin | Aprilia | 24 | +58.622 | 28 |
| Julián Simón | Malaguti | 24 | +1:05.036 | 27 |
| Roberto Locatelli | KTM | 24 | +1:11.674 | 29 |
| Peter Lenart | Honda | 24 | +1:35.808 | 33 |
| Max Sabbatani | Aprilia | 10 | Retirement | 23 |
| Leon Camier | Honda | 7 | Retirement | 32 |
| Imre Tóth | Honda | 2 | Retirement | 31 |
| Stefano Perugini | Aprilia | 1 | Retirement | 5 |
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