400 m, Men
| Competition | 2003 South American Athletics Championships |
|---|---|
| Venue |
Barquisimeto
 VEN
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | William Hernández | VEN |
45.81 | ||
| 🥈 | Anderson dos Santos |  BRA |
46.07 | ||
| 🥉 | Mauricio Mery |  CHI |
46.20 |