said no injuries had been reported involving the problem . The Fusion/Milan 's issue seemed less serious than that of the Prius , said David Champion , the head of auto testing at Consumer Reports . The NHTSA investigation involves only 2010 model year Prius hybrids , which went on sale in the middle of last year . There are only 37,000 of those vehicles on the road , according to the agency . The Prius , which is built in Japan , is not one of the eight models affected by two recent recalls -- covering several million vehicles -- to fix problems with sticking gas pedals . All of those models were built at North American plants . NHTSA said its Office of Defects investigation has received 124 reports from consumers about problems with the Prius brakes , including four reports that involved crashes and two that resulted in injuries . No fatalities have been reported . Investigators have spoken with consumers and conducted preliminary field work . Late Wednesday , Toyota President Akio Toyoda spoke with U.S. Transportation Secretary Ray LaHood , reassuring him that Toyota takes U.S. safety concerns seriously and puts safety at the top
Tokyo , Japan -LRB- CNN -RRB- -- Toyota has added the brake systems of the latest Lexus hybrid vehicles to a growing list of problems with various models , the company said Friday . The company said it was checking the brakes on the Lexus vehicle model HS250h -- as well as a Japanese model called the Sai -- because they use the same system as that used on the 2010 Toyota Prius . Toyota has announced no recall of these vehicles , however , and said it has not received any complaints about the brakes from consumers . But the U.S. National Highway Traffic Safety Administration announced Thursday it is opening a formal investigation into problems with the Prius , Toyota 's fourth-best selling model in the United States and the best-selling model in Japan . The company has acknowledged a software glitch that is causing problems with its braking . It said it is looking further at the best way to repair the problem . On Thursday , Ford announced that it was changing the software in the braking system for its Fusion and Mercury Milan hybrids to correct an occasion glitch in the old software . Ford