Ferrarid olid jällegi tagumiste hulgas. Rubens Barrichello sai 12. aja ning Michael Schumacher oli temast veel kaks kohta tagapool.

Eelmisel vabatreeningul suitseva mootoriga hädas olnud Jenson Button rajale ei tulnud.

Malaisia GP neljanda vabatreeningu tulemused:

1. Jarno Trulli Toyota-Toyota 01:32.832
2. Christian Klien Red Bull-Cosworth 01:32.870
3. Fernando Alonso Renault-Renault 01:32.880
4. Ralf Schumacher Toyota-Toyota 01:32.951
5. David Coulthard Red Bull-Cosworth 01:33.092
6. Giancarlo Fisichella Renault-Renault 01:33.194
7. Kimi Räikkönen McLaren-Mercedes 01:33.349
8. Nick Heidfeld Williams-BMW 01:33.468
9. Mark Webber Williams-BMW 01:33.517
10. Anthony Davidson BAR-Honda 01:33.580
11. Juan Pablo Montoya McLaren-Mercedes 01:33.689
12. Rubens Barrichello Ferrari-Ferrari 01:33.943
13. Felipe Massa Sauber-Petronas 01:34.002
14. Michael Schumacher Ferrari-Ferrari 01:34.102
15. Jacques Villeneuve Sauber-Petronas 01:35.532
16. Tiago Monteiro Jordan-Toyota 01:37.824
17. Narain Karthikeyan Jordan-Toyota 01:38.126
18. Christijan Albers Minardi-Cosworth 01:38.673
19. Patrick Friesacher Minardi-Cosworth 01:38.974