Volkswagen US CEO Michael Horn resigns, citing a 'mutual agreement' with the company. Volkswagen revises previous estimates on CO 2 emissions irregularities, saying that only around 36,000 vehicles are affected. The German Federal Motor Transport Authority (KBA) approves Volkswagen fixes for 1.2, 1.6 and 2.0 diesel engines in Europe. Volkswagen's investigation finds that CO 2 emissions and fuel consumption figures are also affected by 'irregularities'. Volkswagen US CEO Michael Horn testifies before US Congress Volkswagen sets up an online based service on which customers can check if their car is affected based on the vehicle identification number Volkswagen announces plans to refit up to 11 million vehicles affected by the emissions violations scandal Volkswagen to spend $7.3B to cover costs of scandal stock declines another 17 percent Volkswagen admits deception, issues public apologyįirst business day after news, Volkswagen stock down 20 percent Public announcement by EPA of order to recall 2009–2015 cars Volkswagen orders voluntary recall of TDI cars but CARB and EPA not satisfiedĮPA threatens to not certify 2016 diesels, Volkswagen responds by admitting software was programmed to cheat testing Results presented at public forum and published, getting attention of EPAĮPA repeats tests, and contacts Volkswagen for explanation of poor real world NO x emissions Instead, CAFEE finds discrepancies showing poor on-road emissions. International Council on Clean Transportation asks WVU CAFEE to help demonstrate the benefits of US diesel technology, hoping to have Europe follow suit Volkswagen diesel sales in the US rebound, Clean Diesels win several environmental awards, receive tax breaks In Europe, some models are now being described as Euro emission class 5, a change from class 4 in 2008. Cars with the test-rigging software are sold in the UK. Some cars are described in Europe as 'EU4 emissions standard (EU5 compliant)'. Volkswagen announces new Clean Diesel cars. Bosch allegedly warns Volkswagen not to use its software illegally. Volkswagen suspends sales of current diesel lines awaiting technology to meet new standards. Phase-in period of diesel emissions rules NO x limit decreasing from 1.0 g/mi to 0.07 g/mi New US Tier 2 rules established to replace Tier 1. International Council on Clean Transportation, West Virginia University, Volkswagen Group, US EPA, other regulators A 2010 Volkswagen Golf TDI displaying 'Clean Diesel' at the Detroit Auto ShowĮngaging full emissions control only during testing

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