Nick Heidfeld and Mark Webber would finish the opening Saturday practice session in ninth and tenth positions. Both drivers would severely limit their track times with the pair only completing nine laps between them.

The first of the two 45 minute practice session at the Sepang circuit would be run under the usual very hot conditions. The news was that BAR's Takuma Sato would not competing for the rest of the weekend due to illness. His place would be taken by Anthony Davidson. With the start of the session both Jordan's, the Toyota of Ralf Schumacher, and the Minardi's were first out.

For the BMW WilliamsF1 team this session would allow Mark Webber to take to the track after having been limited in his track time due to gear selection problems in the second Friday practice. The first time of the session was set by Albers with a 1m:44.274. he would improve with a 1m:43.608. Team-mate
Freisacher was over a second slower than his team-mate Albers after his first lap. Anthony Davidson would take to the track. Freisacher would go fastest with a 1m:42.978.

Ralf Schumacher would go fastest with a time of 1:37.598, while Davidson would set a time of 1m:43.903. But he would easily beat this time jumping up the order to be second. Ralf would improve his time by a second with a 1m:36.361. Jordan's Monteiro was in third. Ferraris' Rubens Barrichello would take to the track and on his first lap sets a time of 1m:38.513. Team-mate Michael Schumacher would go fastest with a time of 1m:35.854. After a difficult Friday McLaren's Kimi Raikkonen would go second with a 1m:35.930.

For Red Bull's David Coulthard he would improve to be fifth with a time of 1m:37.117. If he finishes sixth or higher David will become Britain's highest ever points scorer. With over half an hour of the session run neither Nick or Mark had set a time. Montoya would move into third with Ralf now in fourth. Michael would improve his time with a 1m:35.063.

Mark would take to the track and would set a time of 1m:36.781 to be fifth. He would improve with a 1m:36.465. Jarno Trulli moves into third with a 1m:35.955, while Fisichella was now in second with a 1m:35.880. It was all starting to happen as the session neared a finish. Jenson Button was in seventh with a 1m:36.654. Montoya was now in second but was beaten by Ralf Schumacher. Alonso would go fastest with a 1m:35.026.

He would move into the 1m:34's with a time of 1m:34.715. Team-mate Fisichella would join Alonso at the top of the times with a 1m:34.930 to be second. But Michael would sneak past the Renault to move into second with a time of 1m:34.883, with Raikkonen now in fourth.