The opening Friday practice for the Hungarian Grand Prix would see other changes. For the Toyota team these saw Ricardo Zonta replace Da Matta, while joining the team as Friday test driver was Australian Ryan Briscoe.

With fifteen minutes of the session BAR's Anthony Davidson would go fastest with a lap time of 1m:26.835. With Button moving to WilliamsF1 Davidson would be out to further impress the BAR team. He would improve with a 1m:26.280. Team-mate Button was the first of the serious drivers to start a quick lap but he would abort it. Jaguar's Wirdheim would move into second with a 1m:27.150.

For Toyota new-comer Ryan Briscoe would set his first lap time with a lap of 1m:28.981. Sauber's Felipe Massa would put his car at the top of the times with a 1m:25.218. Team-mate Giancarlo Fisichella would quickly take the top spot with a time of 1m:24.198. Massa would have a moment travelling across the gravel but been able to return to his garage. For local hero Zsolt Baumgartner his session would see him suffer a rear tyre puncture.

The first of the WilliamsF1 drivers to set a time would be Antonio Pizzonia moving into sixth with a 1m:27.029. He would improve with a time of 1m:25.404 to now be third. BAR's Takuma Sato was now sixth with a time of 1m:25.894. Jordan's Timo Glock would go fastest with a time of 1m:24.883. But a 1m:23.994 for Davidson would again see him fastest. Wirdheim was now in
third with a 1m:24.265.

Most of the top runners were waiting till late in the session before coming out, hoping that others would sweep the track for them. The first to come out was Michael Schumacher. With an stunning lap time of 1m:21.552 Michael would go fastest. he was 2.4 seconds quicker than any other driver. BAR's Jenson Button would come out an set the third fastest time, a lap of 1m:24.140. Renault's Jarno Trulli would take that spot with a 1m:24.124.

Rubens Barrichello would move into second with a time of 1m:22.730, while Toyota's Olivier Panis would bring his TF104B into third with a 1m:23.827. So with Fifteen minutes of the session remaining it was the Ferrari pair out the front. Rubens would improve his time with a lap of 1m:21.938, but Michael was still out in front.

Juan Pablo would spin at Turn 13 stopping just short of the tyre barriers. He was able to continue and returned to the pits. Juan Pablo would put in a late quick lap to move himself up from fourteenth to sixth fastest. But he was 2.201 seconds off the quickest time.

With less than ten minutes left to run McLaren's David Coulthard would jump into fourth with a time of 1m:23.100. team-mate Raikkonen would move past David with a time of 1m:23.024. Briscoe would move into the top ten ten with a 1m:24.108. Jaguar's Christian Klein would beach his car in the gravel ending his session.