4 x 400 m Relay, Men
| Competition | 2021 South American Athletics U23 Championships |
|---|---|
| Venue |
Guayaquil
 ECU
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Brazil |  BRA |
3:08.78 | ||
| Evandro Martins | — | ||||
| Vinicius Silva Moraes | — | ||||
| João Falcão Cabral | — | ||||
| Douglas Mendes | — | ||||
| 🥈 | Ecuador | ECU |
3:10.63 | ||
| Katriel Ángulo | — | ||||
| Miguel Maldonado | — | ||||
| Steeven Salas | — | ||||
| Alan Minda | — | ||||
| 🥉 | Colombia |  COL |
3:21.28 | ||
| Daniel Sánchez | — | ||||
| Juan Mena | — | ||||
| Ronald Grueso | — | ||||
| Neiker Abello | — |