Volkswagen installed "defeat devices" in 11 million of its diesel vehicles worldwide between 2008-2015 to circumvent emissions tests. In 2015, the EPA issued Volkswagen with a notice of violation for installing the devices in US vehicles. The scandal had major financial and reputational consequences for Volkswagen, wiping out a third of the company's market value. Former CEO Martin Winterkorn resigned under threat of criminal investigation. The company faced billions in fines and lawsuits, and its actions damaged consumer trust and its public image.