After their encouraging opening practice for the 2009 Malaysian Grand Prix the AT&T Williams team would see its drivers finish the day in fourth and eighth positions, with Nico Rosberg leading team-mate Kazuki Nakajima. The drivers would tae to the track very early with clouds building up over the circuit.

At the front it would be the Ferrari's of Raikkonen and Massa who would led the times. Raikkonen would set the fastest time so far with a 1m:35.707. This time was set on the softer of the available Bridgestone tyres. Nico Rosberg's previous time set in the earlier session was set on the hard tyre, which was been used for the first time.

Sebastian Vettel would finish in third, followed by Nico in fourth for Williams. Nico and Kazuki would both have a time during the session where he was fastest. Roughly half way through the session Kazuki would set a time of 1m:36.34, to go fastest. Nico would be fifth fastest but in the final minutes would improve to fourth.

Later in the session Massa would set a time of 1m:35.832 to go fastest. But he was beaten by team-mate Raikkonen with a 1m:35.706. Fifth was Webber from Barrichello and Button. Kazuki would finish in eighth ahead of Piquet. Several drivers would have spins or leave the track none more so than  Fisichella who damaged his car against the barrier at Turn 10.

The performance of the Williams drivers must again be encouraging for the team especially after their strong performance in Australia.

After the end of the session it was confirmed that Barrichello would be given a five-place grid penalty for Sunday's race after needing a gearbox change following Friday's practice. This penalty is due to the rule that states that gearboxes must last for four grand prix weekends.

Pos  Driver        	Team			      Time        Laps
 1.    Raikkonen    	Ferrari               		(B)  1:35.707   40
 2.    Massa        	Ferrari               		(B)  1:35.832   38
 3.    Vettel       	Red Bull-Renault      		(B)  1:35.954   40
 4.    Rosberg      	AT&T Williams-Toyota       	(B)  1:36.015   39
 5.    Webber       	Red Bull-Renault      		(B)  1:36.026   36
 6.    Barrichello  	Brawn-Mercedes        	(B)  1:36.161   37
 7.    Button       	Brawn-Mercedes        	(B)  1:36.254   31
 8.    Nakajima     	AT&T Williams-Toyota       	(B)  1:36.290   35
 9.    Kovalainen   	McLaren-Mercedes      	(B)  1:36.397   40
10.   Piquet       	Renault               		(B)  1:36.401   35
11.   Hamilton     	McLaren-Mercedes      	(B)  1:36.515   30
12.   Trulli       	Toyota                		(B)  1:36.516   34
13.   Buemi        	Toro Rosso-Ferrari    		(B)  1:36.628   32
14.   Glock        	Toyota                		(B)  1:36.639   29
15.   Alonso       	Renault               		(B)  1:36.640   20
16.   Sutil        	Force India-Mercedes  	(B)  1:36.875   36
17.   Kubica       	BMW-Sauber            		(B)  1:37.267   38
18.   Bourdais     	Toro Rosso-Ferrari    		(B)  1:37.278   30
19.   Fisichella   	Force India-Mercedes  	(B)  1:37.432   27
20.   Heidfeld     	BMW-Sauber            		(B)  1:37.930   37