Simplify the following text for a Grade 4 native English-speaking person.
Original: Having not won a Grand Prix as an independent , the team was sold to BMW in 2005 , and competed as BMW Sauber from 2006 to 2009 , scoring one victory .
Simplified: Having not won a single Grand Prix race , the team was sold to BMW in 2005 . The team competed as BMW Sauber from 2006 to 2009 , and won one race .