Mitsubishi has admitted to submitting falsified fuel economy data for more vehicles than it originally disclosed.

The Japanese brand said today that it suspects that nine current models and a number of cars that aren’t sold anymore all have incorrect fuel economy ratings thanks to intentionally manipulated data. Mitsubishi is currently investigating the matter, though it is not surprising more models are affected considering the brand has admitted to using its cheating method for up to 25 years.

Last month, Mitsubishi admitted to submitting incorrect data for the fuel economy ratings of four of its mini kei cars, sold in Japan. Two of the models were actually sold by Nissan, though they were built by Mitsubishi, and it was Nissan that discovered the fuel economy discrepancy during internal testing. Mitsubishi is working out a plan to compensate Nissan over the matter.

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It still isn’t clear if any of the models affected are in the U.S., though both the EPA and the California Air Resources Board (CARB) will be conducting independent testing of Mitsubishi models to make sure they comply with U.S. regulation.

The cost of this scandal won’t be known until the full scope of the cheating is revealed, though some analysts think it cost Mitsubishi up to $1 billion.

Automotive News

This article originally appeared at AutoGuide.com