12/11/2025
⚠️Dieselgate – how Volkswagen started a global scandal
The Volkswagen emissions scandal, more commonly known as ‘Dieselgate’, remains one of the most significant corporate fraud cases in modern history. It not only exposed the lengths some car manufacturers would go to deceive regulators and customers, but also revealed the wider impact of corporate misconduct on public health and the environment.
Nearly a decade later, Dieselgate is far from over. The High Court in London is now hearing fresh claims against five other major carmakers accused of similar behaviour — marking one of the largest consumer and environmental justice cases ever brought in the UK.
👉 The birth of a scandal
In September 2015, the United States Environmental Protection Agency (EPA) announced that Volkswagen had been using illegal software in their diesel engines to cheat emissions tests.
This “defeat device” software could detect when a car was undergoing emissions testing and activate full emissions controls to meet regulatory standards. However, during regular driving conditions, the software would deactivate or reduce the effectiveness of these controls, leading to nitrogen oxide (NOx) emissions up to 40 times higher than the legal limit.
The initial discovery was made by a small team of researchers at West Virginia University, who were conducting on-road tests of diesel vehicles. They found significant discrepancies between the emissions levels recorded during official tests and those observed in real-world driving. These findings prompted further investigations by the EPA, ultimately revealing the widespread use of defeat devices by Volkswagen and other car manufacturers.
Volkswagen’s admission to using defeat devices affected approximately 11 million vehicles worldwide, including nearly 1.2 million in the UK.
The fallout was immense. Volkswagen faced billions in fines, criminal prosecutions and reputational damage. In the UK, the company paid £193 million in compensation in 2022, with affected drivers receiving an average of £2,120 each. Globally, Volkswagen has paid more than £27 billion in settlements, fines and buybacks.
👉The ongoing impact of Dieselgate... Learn more about it here:
The Volkswagen emissions scandal, more commonly known as ‘dieselgate’, is one of the most significant corporate fraud cases in history.