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epa05288265 (FILE) A file picture dated 01 October 2015 shows the measuring pipe of a machine for the analysis of exhaust fumes for Diesel motors attached to an exhaust pipe of a Volkswagen Golf 2.0 TDI, photographed in a workshop in Frankfurt (Oder), Germany. Car manufacturer Volkswagen had installed illegal software in their Diesel motors EA189, which lowers the amount of nitrogen oxide during tests. A software update is said to solve the problem. Volkswagen informed their clients via letters that their cars need to be reprogrammed. EPA/PATRICK PLEUL