Toyota has received a lot of negative publicity for its sticking accelerator pedal and floormat recalls, and now brake problems with the Prius can be officially added to the list. While there were reports of some serious concern about the brakes in the best-selling hybrid, Toyota has now admitted that there are indeed known problems with the car's anti-lock braking system.

A Toyota spokesperson said on Thursday that Prius models sold before the end of January have this brake system design problem, but that the problem has been corrected on models sold since then, according to the Associated Press. The announcement follows Japanese and U.S. officials ordering the company yesterday to investigate around 180 claims of braking problems in the 2010 Prius.