Failure pattern · Germany · 2015–2020
Volkswagen Dieselgate: cheating emissions tests
Volkswagen installed software that detected emissions tests and cut pollution only during testing, in about 11 million cars. The scandal cost it over €30 billion and forced a pivot to electric cars.
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
by the numbers
- Affected vehicles
- about 11 million worldwide
- EPA announcement
- September 2015
- Total cost
- over €30 billion
What happened
Volkswagen aimed to become the world's largest carmaker and heavily promoted ‘clean diesel’ cars in the US. Its engines struggled to meet strict US nitrogen-oxide limits at acceptable cost, so engineers installed ‘defeat device’ software that recognised test conditions and switched on full emissions controls only then.
Researchers from West Virginia University, working with the International Council on Clean Transportation, measured real-world emissions far above legal limits. In September 2015 the US Environmental Protection Agency announced violations. VW admitted about 11 million vehicles worldwide had the software, and CEO Martin Winterkorn resigned.
Fines, buy-backs, and settlements cost VW more than €30 billion, and several executives faced criminal charges. VW responded by committing heavily to electric vehicles with its ID range.
Timeline
- 2014
Independent tests reveal high real-world emissions.
- 2015
EPA notice; VW admits; CEO resigns.
- 2016
Major US settlements.
- 2020
ID.3 electric car launches in Europe.
what went wrong
- Aggressive growth targets with no room for failure.
- A culture where engineers felt unable to say no.
- Marketing promises the engineering couldn't deliver.
the lesson
When leaders demand results without listening to what's possible, people may cheat — and the eventual cost dwarfs the original problem.
Apply it to your business
- 1Make it safe to report that a target can't be met honestly.
- 2Never promise customers what you can't legally deliver.
- 3Audit high-pressure targets for incentives to cheat.
Laws at work in this story
Figures are rounded and drawn from public reports, company filings and widely cited coverage at the time. Check the company's latest filings before relying on any number.