400m Women Semifinals, Heat:1 of 2 ; Official result since 17:38
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 6 | 69 | PUTERI NUR SAFIRAH GAJALI | SBAH | 1:02.42 | Q | |||
| 2 | 3 | 90 | CHLOE THONG YUEH | SAWK | 1:04.53 | Q | |||
| 3 | 5 | 43 | JOANNA MARIE L.AGUDO | MIND | 1:05.29 | Q | |||
| 4 | 2 | 133 | HEGALASHINI A/P GOPALAKRISHNAN | LBUN | 1:06.12 | q | |||
| 5 | 4 | 34 | SITI SYAMIMIE BINTI MOHAMMAD SAFRI | BRUB | 1:18.87 |