The National Highway Traffic Safety Administration (NHTSA) has expanded its investigation into consumer complaints of fires and “thermal event incidents” with various model years of Toyota Camry and Yaris cars and Highlander and RAV4 SUVs. The probe by NHTSA’s Office of Defects Investigation (ODI) now involves the 2007-2009 model Toyota Yaris , Toyota RAV4 and Toyota Camry , including the gas-electric hybrid version.