Fiat Chrysler Automobiles and engine supplier Cummins have been hit with a second lawsuit alleging diesel emissions fraud similar to one filed last month.

The class-action lawsuit was filed Friday at U.S. District Court in Detroit claiming FCA used “defeat devices” to cheat emissions testing on its larger Ram diesel pickups.

FCA US was sued with Cummins Inc., which supplied 6.7-liter diesel engines for 450,000 heavy-duty 2500 and 3500 Dodge and Ram pickups from the 2007-2012 model years. The suit, which includes a North Carolina resident, is similar to another class-action suit filed in California and Texas against both companies last month.

Both of these class-action lawsuits accuse FCA and Cummins of racketeering, breach and violation of warranties, fraudulent concealment, and breach of contract. Neither company commented to Detroit News by Wednesday, but both denied allegations after the November filing.

“Based on the information available to it, FCA US does not believe that the claims brought against it are meritorious,” the company said last month. “FCA US will contest this lawsuit vigorously.”

“We’re deeply disappointed in the effort to tarnish our image and we will vigorously defend ourselves,” Cummins spokesman Jon M. Mills said in November, “We’ve had a great partnership with Chrysler for more than 30 years and our companies continue to be committed to putting our customers first.”

Both lawsuits have requested that a jury trial take place. Attorneys are seeking compensatory damages and other financial relief from the two companies.

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FCA has another class-action lawsuit to fight over claimed emissions cheating. Filed Dec. 1 in the U.S. District Court for the Northern District of California, that suit alleges Ram 1500 light-duty pickups and Jeep Grand Cherokee models were engineered to deceive emissions tests.

The Ram 1500 lawsuit included supplier Robert Bosch GmbH, which was accused of installing software to hide excess exhaust emissions. Bosch has been pulled into the Volkswagen emissions cheating scandal for supplying that software.

U.S. regulators haven’t named FCA and Cummins in allegations related to the VW diesel emissions scandal.

Detroit News