Following up its sad, grayscale Superbowl ad, on Tuesday Toyota is expected to announce a recall of 300,000 Prius hybrids with faulty brakes. Japan's Kyodo News broke the news, which has not been confirmed by Toyota. In the U.S. at least 100 drivers have complained that their anti-lock breaks freeze momentarily on bumpy roads, reports the AP, and four accidents are suspected to have been caused by the defect. Last week, the U.S. Government pledged to investigate. If the recall goes through, it will affect drivers of the latest Prius model, who bought their cars after May of last year. Already this year the automaker has recalled over 7 million cars around the world.