In 2006, Klien was unsuccessful in comparison to his more experienced teammate David Coulthard, as the Brit scored the team's first podium and was more consistent than Klien throughout the season. In August 2006, it was confirmed that Klien would not stay with the Red Bull team for the upcoming 2007 season, or at least as a race driver, due to Red Bull's signing of Mark Webber. After the 2 points finishes in Bahrain and Germany, there was some uncertainty as to where Klien would go next in his racing career, speculation suggested America as a logical choice for the Austrian, but he refused a ChampCar seat in a Red Bull-backed team for 2007, preferring to chase a Formula One drive with another team. As a result, the team announced that Klien had been dropped for the last three races of the season in favour of test driver Robert Doornbos.