The National Highway Traffic Safety Administration’s (NHTSA) Office of Defects Investigation (ODI) opened an investigation into General Motors’s 6.2-liter V-8 over continued failures.The ODI’s investigation involves an engineering analysis of recall 25V-274 and has been expanded to include engines produced after the production period noted in the recall. According to NHTSA, the ODI has received 499 reports alleging post-remedy engine failures, while GM itself has reported 6953 such complaints.