Is Your Car on This List of Vehicles That Lied About Their Greenhouse Gas Emissions?

So you thought you were helping save the planet by buying a low-emission Hyundai or Kia car or SUV?

If you bought a 2012 or 2013 model, you weren’t.

The United States Environmental Protection Agency on Monday announced that the Korean automakers had agreed to pay a record $150 million fine for underreporting how much greenhouse gas those cars emit while collecting emissions credits worth more than $200 million.

Just how much more carbon will the 1.2 million cars the automakers sold in the U.S. actually spew? Try 4.75 million metric tons. That’s as much greenhouse gas as is emitted by the energy needed to power 433,000 homes annually, according to the EPA.

“Greenhouse gas emission laws protect the public from the dangers of climate change, and today’s action reinforces EPA’s commitment to see those laws through,” EPA administrator Gina McCarthy said in a statement. “Businesses that play by the rules shouldn’t have to compete with those breaking the law.”

Check the list below to see if one of these cars is in your garage.

The penalty is the largest ever collected for a violation of the federal Clean Air Act. Hyundai and Kia will pay a $100 million fine and spend $50 million to ensure the misreporting doesn’t happen again. The carmakers will also forfeit the $200 million in greenhouse gas emissions credits.

What about those fuel economy stickers on the 2012 and 2013 models? Don’t believe them. The EPA said Hyundai and Kia overstated how many miles per gallon their cars achieve by one to six miles.

The EPA discovered the misstatements when it tested the carmakers’ vehicles to see if their real-world performance matched their window sticker claims.