December 22, 2023

Cummins Inc. has agreed in principle to pay $1.675 billion—the largest ever Clear Air Act violation penalty—for installing defeat devices or undisclosed auxiliary emissions control devices on 960,000 RAM engines from 2014 through 2023. Defeat devices enable users to bypass, defeat, or render inoperative the onboard emissions controls required by the Clean Air Act, producing thousand of tons of excess omissions of nitrogen oxides, to which exposure over time can cause respiratory issues. DOJ

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