A look at Volkswagen's 1-year-old emissions scandal

Here is a timeline of the emissions scandal that has dogged automaker Volkswagen for the past year.



Sept. 18: The U.S. Environmental Protection Agency says Volkswagen installed software on more than 475,000 cars that enabled them to cheat on emissions tests. The software reduced nitrogen oxide emissions when the cars were placed on a test machine but allowed higher emissions and improved engine performance during normal driving. The EPA was alerted to the discrepancy in a report from the International Council on Clean Transportation.

Sept. 22: Volkswagen says about 11 million diesel vehicles worldwide were fitted with the deceptive software. It sets...