Heavy Duty Trucking Logo
MenuMENU
SearchSEARCH

Cummins Agrees to Pay Record-Setting Emissions Penalty

While Cummins did not admit to any wrongdoing, it agreed to pay a hefty penalty to settle the government's allegations that the engine maker violated the Clean Air Act by installing emissions defeat devices on hundreds of thousands of diesel engines in Ram trucks.

December 26, 2023
Cummins Agrees to Pay Record-Setting Emissions Penalty

Cummins is paying a record penalty to settle allegations that it installed "defeat devices" on Ram pickup truck engines.

Credit:

HDT graphic/Cummins/DOJ

3 min to read


Engine maker Cummins Inc. will pay a $1.675 billion penalty to settle claims that it violated the Clean Air Act by installing emissions defeat devices on hundreds of thousands of diesel engines in Ram trucks.

That's the amount reached in an agreement with the United States and the State of California. The government alleged that Cummins installed “defeat devices” on these engines — parts or software that bypass, defeat, or render inoperative emissions controls such as emission sensors and onboard computers.

Ad Loading...

The trucks affected were 630,000 model year 2013 to 2019 Ram 2500 and 3500 pickup truck engines. The company also allegedly installed undisclosed auxiliary emission control devices on 330,000 model year 2019 to 2023 Ram 2500 and 3500 pickup truck engines.

In a statement, Cummins said that it had “seen no evidence that anyone acted in bad faith and does not admit wrongdoing.”

The company said it has “cooperated fully with the relevant regulators, already addressed many of the issues involved, and looks forward to obtaining certainty as it concludes this lengthy matter. Cummins conducted an extensive internal review and worked collaboratively with the regulators for more than four years.”

The U.S. Justice Department said this is the largest civil penalty it has ever secured under the Clean Air Act, and the second largest environmental penalty.

To put that $1.675 billion into perspective, the Indiana Business Journal points out, Cummins had annual profits of $2.2 billion on $28.1 billion in sales last year.

Ad Loading...

“Our preliminary estimates suggest that defeat devices on some Cummins engines have caused them to produce thousands of tons of excess emissions of nitrogen oxides,” said Attorney General Merrick B. Garland in a Justice Department statement.

The Justice Department is working to incorporate the agreement into a consent decree that will be filed with the U.S. District Court for the District of Columbia.

“This historic agreement should make clear that the Justice Department will be aggressive in its efforts to hold accountable those who seek to profit at the expense of people’s health and safety,” Garland said.

Concluding a Four-Year Emissions Saga

The story goes back to 2019, when Cummins announced it had begun a formal review of its emissions certification and compliance process relating to diesel engines it supplied for Ram pickups.

The review came after questions from the U.S. Environmental Protection Agency and California Air Resources Board about the new diesel engine that powered the 2019 Ram 2500 and 3500 trucks. This 6.7-liter turbo diesel made up to 1,000 pounds-feet of torque and up to 400 horsepower.

Ad Loading...

What's Next for Owners of Affected Trucks?

Stellantis has already recalled the model year 2019 trucks and has initiated a recall of the model year 2013 to 2018 trucks, according to the New York Times. The software in those trucks will be recalibrated so they are fully compliant with federal emissions law.

Next steps are unclear on the model year 2020 through 2023 trucks, said the NYT.

More Equipment

PlusAI, Traton Group autonomous truck partnership.
Equipmentby News/Media ReleaseFebruary 2, 2026

Traton, PlusAI Accelerate Factory-Built Autonomous Truck Launch in U.S. and Europe

The companies also said they plan to coordinate deployment planning across priority freight corridors and define routes and operational design domains for U.S. commercial service while laying the groundwork for expansion into key European markets.

Read More →
SponsoredFebruary 1, 2026

Stop Watching Footage, Start Driving Results

6 intelligent dashcam tactics to improve safety and boost ROI

Read More →
Volvo Trucks FH.
Equipmentby News/Media ReleaseJanuary 29, 2026

Volvo Repeats as Europe’s Heavy-Truck Market Leader in 2025

Volvo Trucks held onto the top spot in Europe’s heavy-duty truck market for the second straight year.

Read More →
Ad Loading...
Western Star's Star Nation 2025 in Bend, Oregon.
Equipmentby News/Media ReleaseJanuary 24, 2026

Western Star Opens Entries for 2026 Star Nation Experience

Previous Star Nation events have included driver challenges, exclusive access to Daimler Truck North America facilities and hands-on experiences with the latest Western Star X-Series lineup.

Read More →
Volvo VNL tractor.
EquipmentJanuary 22, 2026

Europe’s HayWay Group Enters U.S. Market with Order for 80 Volvo VNLs

HayWay Group comprises 19 companies operating across Europe and the U.S. and is now bringing its international logistics experience to North America.

Read More →
SponsoredJanuary 19, 2026

3 New Ways Fleet Software Pays: ROI opportunities for modern fleet managers

Safety, uptime, and insurance costs directly impact profitability. This eBook looks at how fleet software is evolving to deliver real ROI through proactive maintenance, AI-powered video telematics, and real-time driver coaching. Learn how fleets are reducing crashes, defending claims, and using integrated data to make smarter operational decisions.

Read More →
Ad Loading...
SponsoredJanuary 19, 2026

Basic Tracking vs Next Generation Fleet Technology

Fleet software is getting more sophisticated and effective than ever, tying big data models together to transform maintenance, safety, and the value of your existing tech stack. Fleet technology upgrades are undoubtedly an investment, but updated technology can offer a much higher return. Read how upgrading your fleet technology can increase the return on your investment.

Read More →
PlusAI-T2 Japan autonomous partnership.
Equipmentby News/Media ReleaseJanuary 16, 2026

PlusAI, T2 Partner to Bring Level 4 Autonomous Trucks to Japan

PlusAI is seeking to relieve Japan’s acute truck driver shortage by accelerating the adoption of autonomous trucks in the country.

Read More →
Three Freightliner fifth-generation Cascadia trucks are shown parked in a lineup, highlighting exterior design and aerodynamic styling.
Equipmentby News/Media ReleaseJanuary 13, 2026

Freightliner Cascadia Receives Prestigious Design Award

Freightliner’s fifth-generation Cascadia earned a 2025 Red Dot Design Award for its aerodynamic design and functional updates developed through close collaboration between designers and engineers.

Read More →
Ad Loading...
2026 Mack Anthem.
EquipmentJanuary 13, 2026

Mack Begins Redesigned Anthem Production

Mack’s new Anthem Class 8 tractor targets regional-haul fleets with enhanced maneuverability and fuel economy gains.

Read More →