Volkswagen dieselgate

Volkswagen dieselgate
Title	Volkswagen dieselgate
Caption	Volkswagen headquarters in Wolfsburg, 2015
Date	2008–2015 (discovery 2015)
Location	Germany, United States, European Union, Worldwide
Cause	emissions test defeat device software
Outcome	recalls, fines, criminal charges, regulatory reforms

Volkswagen dieselgate Volkswagen dieselgate was a multinational emissions scandal centered on Volkswagen AG and its subsidiaries Audi, Porsche (diesel models), which involved the use of software to manipulate emissions testing results for diesel engine vehicles. The scandal prompted investigations by authorities including the United States Environmental Protection Agency, the California Air Resources Board, the European Commission, and national agencies in Germany and other European Union member states, leading to recalls, fines, and corporate governance changes at Volkswagen AG.

Background

From the early 2000s through the 2010s, Volkswagen AG marketed TDI diesel vehicles as low-emission options competitive with Toyota Motor Corporation hybrids and General Motors gasoline models. Engineering development at Volkswagen Group involved teams in Wolfsburg, Munich (BMW proximity), and research partnerships with institutes such as the Fraunhofer Society and universities like the Technical University of Munich. Global regulatory regimes including the United States Environmental Protection Agency, California Air Resources Board, and national regulators in Germany, France, United Kingdom, and Italy governed laboratory emissions protocols that influenced product development and marketing strategies across multinational automakers including Ford Motor Company, Renault, Fiat Chrysler Automobiles, and Honda.

Discovery and Investigation

Initial attention arose after independent testing by organizations such as the International Council on Clean Transportation and academic groups at institutions including West Virginia University and North Carolina State University identified discrepancies between laboratory and real-world emissions for certain Volkswagen diesel models. The United States Environmental Protection Agency and California Air Resources Board issued notices of violation in September 2015, prompting coordinated probes by the United States Department of Justice, the German Federal Motor Transport Authority (KBA), the European Commission DG for Competition, and criminal investigations in jurisdictions including Sweden, France, South Korea, and Brazil. Congressional hearings by the United States House Committee on Energy and Commerce and the United States Senate Committee on Environment and Public Works examined executive testimony from Martin Winterkorn and board members of Volkswagen AG.

Technical Details of the Defeat Device

Engine control software in affected EA189 and later EA288 diesel engines contained calibration algorithms that altered emissions control operation between test and normal modes. The calibration used input variables replicating laboratory conditions defined by bodies such as the International Organization for Standardization and test cycles like the New European Driving Cycle and the Federal Test Procedure. Under lab-like inputs the software increased operation of selective catalytic reduction systems and exhaust gas recirculation, reducing NOx outputs; under real-world inputs it prioritized performance, fuel economy, and diesel particulate filter regeneration, resulting in elevated nitrogen oxides emissions. Engineers and managers in Volkswagen Group technical departments and suppliers such as Bosch were focal points for investigations into corporate knowledge and implementation of the so-called defeat device.

Legal Actions and Penalties

Legal consequences included civil settlements, criminal prosecutions, and regulatory fines across multiple jurisdictions. In the United States, Volkswagen AG pleaded guilty to fraud and obstruction charges in 2017, agreeing to a multibillion-dollar settlement with the United States Department of Justice and buyback and compensation programs administered with the Environmental Protection Agency and California Air Resources Board. European authorities, including the German Federal Court and the European Court of Justice, handled litigation over recalls and consumer claims, while criminal investigations in Germany led to charges against executives and engineers. Financial penalties and remedial obligations were levied by national agencies in Italy, France, Spain, Norway, and South Korea, and class action suits were filed in United States District Court and other forums, involving litigation funds and consumer protection bodies.

Corporate and Financial Impact

The scandal precipitated leadership changes at Volkswagen AG, including the resignation of CEO Martin Winterkorn and subsequent appointments such as Matthias Müller and Herbert Diess. Market repercussions affected Volkswagen stock traded on the Frankfurt Stock Exchange and indices like the DAX, with credit rating reviews by agencies including Moody's Investors Service and Standard & Poor's. Financial impacts encompassed billions in remediation costs, fines, buybacks, and provisions, settlements with shareholders, and strategic shifts toward electrification including investments in battery electric vehicle programs, partnerships with suppliers like LG Chem, and initiatives such as the Volkswagen ID series and charging infrastructure investments aligned with policies in European Union member states and incentives in Norway and China.

Environmental and Public Health Consequences

Independent studies by institutions such as the International Council on Clean Transportation, University of Oxford, and national public health agencies linked excess NOx emissions from affected vehicles to increased respiratory and cardiovascular morbidity in urban areas across Europe and North America. Epidemiological research published in journals and conducted by teams at universities including Harvard and Imperial College London modeled attributable deaths and hospitalizations, prompting regulatory reassessments of air quality compliance under directives such as the European Union Ambient Air Quality Directive.

Reforms and Industry-wide Effects

Dieselgate spurred regulatory and industry reforms: tightening of laboratory and on-road testing protocols including adoption of Worldwide Harmonized Light Vehicles Test Procedure and Real Driving Emissions standards, increased oversight by agencies like the European Commission and United States Environmental Protection Agency, and corporate governance reforms at Volkswagen AG and other manufacturers including Renault-Nissan-Mitsubishi compliance programs. The scandal accelerated shifts toward electric vehicle development, influenced policies in Germany such as dialogues with the Federal Ministry of Transport and Digital Infrastructure, and reshaped relationships between manufacturers, suppliers like Robert Bosch GmbH, and testing organizations including TÜV.

Category:Automotive scandals