Honda fully bought BAR in 2005 and it became the Honda team for 2006. The team had a decent start to the season, but a performance slump mid-season led to car designer Geoff Willis leaving the team. The inexperienced Shuhei Nakamoto replaced him. However, things started to improve after the French GP, Honda having a strong run of points finishes and most notably, Jenson Button winning the Hungarian Grand Prix. Button scored more points in the last six races of the season than any other driver to help Honda finish fourth in the constructors' championship.