1989 IAAF World Indoor Championships – Men's 400 metres

The first 2 of each heat (Q) and next 2 fastest (q) qualified for the semifinals.[1]

Rank	Heat	Name	Nationality	Time	Notes
1	3	Cayetano Cornet	Spain	46.64	Q
2	5	Brian Whittle	Great Britain	46.69	Q
3	5	Slobodan Branković	Yugoslavia	46.69	Q
4	1	Antonio McKay	United States	46.86	Q
5	2	Howard Burnett	Jamaica	46.91	Q
6	5	Bert Cameron	Jamaica	46.93	q
7	2	Jörg Vaihinger	West Germany	47.00	Q
7	4	Gabriel Tiacoh	Ivory Coast	47.00	Q
9	1	Ian Morris	Trinidad and Tobago	47.09	Q
10	1	Arjen Visserman	Netherlands	47.11	q
11	3	Alemayehu Gudeta	Ethiopia	47.14	Q, NR
12	4	Clarence Daniel	United States	47.20	Q
13	5	Ervin Katona	Hungary	47.33
14	3	Todd Bennett	Great Britain	47.35
15	3	Tomasz Jędrusik	Poland	47.36
16	2	Gusztáv Menczer	Hungary	47.43
17	1	Antonio Sánchez	Spain	47.60
18	2	Romeo Gido	Philippines	47.63	NR
19	3	Klaus Just	West Germany	47.67
20	5	Anton Skerritt	Canada	47.69
21	2	Patrick Delice	Trinidad and Tobago	47.86
22	4	Takahiro Watanabe	Japan	47.97
23	4	Troy Douglas	Bermuda	48.46	NR
24	2	Ahmed Abdelhalim Ghanem	Egypt	48.63
25	1	Luis Karim Toledo	Mexico	48.65	NR
26	4	Gerson Souza	Brazil	49.04

First 3 of each semifinal (Q) qualified directly for the final.[2]

Rank	Heat	Name	Nationality	Time	Notes
1	1	Antonio McKay	United States	46.06	Q
2	1	Cayetano Cornet	Spain	46.30	Q
3	2	Slobodan Branković	Yugoslavia	46.49	Q
4	1	Ian Morris	Trinidad and Tobago	46.52	Q, NR
5	2	Gabriel Tiacoh	Ivory Coast	46.69	Q, NR
6	2	Brian Whittle	Great Britain	46.71	Q
7	2	Arjen Visserman	Netherlands	46.94
8	1	Alemayehu Gudeta	Ethiopia	46.96	NR
9	1	Jörg Vaihinger	West Germany	47.01
10	2	Clarence Daniel	United States	47.03
11	1	Howard Burnett	Jamaica	47.18
12	2	Bert Cameron	Jamaica	47.78

[3]

Rank	Lane	Name	Nationality	Time	Notes
	5	Antonio McKay	United States	45.59	CR
	2	Ian Morris	Trinidad and Tobago	46.09	NR
	4	Cayetano Cornet	Spain	46.40
4	6	Slobodan Branković	Yugoslavia	46.48
5	3	Brian Whittle	Great Britain	46.78
6	1	Gabriel Tiacoh	Ivory Coast	47.35