Volkswagen has revealed that around 1.2 million of its vehicles in the UK are affected by the emissions scandal.
Affected vehicles include more than 500,000 diesel-power Volkswagen cars, almost 80,000 VW vans, nearly 400,000 Audi cars, more than 75,000 Seat cars, and 131,000 Skoda cars.
Volkswagen owns the Audi, Seat and Skoda brands.
The German car manufacturer, said it will give car owners a way to identify whether or not their vehicle is affected in the coming days.
VW stressed that the cars are completely safe to drive.
The scandal is expected to cost Volkswagen, one of the world's biggest car manufacturers, billions after 11 million vehicles were revealed to have used the so-called 'defeat device'. It allowed the cars the show lower emissions during testing than they actually produce.
Speaking to BBC Newsnight on Tuesday, Volkswagen board member Olaf Lies said those involved had acted criminally and needed to accept responsibility.