The sign of a Toyota garage is pictured in front of an advertising billboard in Vienna February  5, 2010. Toyota Motor Corp, already reeling from two massive recalls, faced the possibility of a third when U.S. safety regulators opened a probe on Thursday into a braking problem on the Prius, the world's top-selling hybrid. "Hoechste Qualitaet" reads "Highest quality". Reuters Pictures logo Reuters Pictures 24 months ago

The sign of a Toyota garage is pictured in front of an advertising billboard in Vienna February 5, 2010. Toyota Motor Corp, already reeling from two massive recalls, faced the possibility of a third when U.S. safety regulators opened a probe on Thursday into a braking problem on the Prius, the world's top-selling hybrid. "Hoechste Qualitaet" reads "Highest quality".