Fiat Chrysler Automobiles (FCA) has been hit with a class-action lawsuit that accuses the carmaker of knowingly selling millions of vehicles with an engine issue.

The lawsuit, filed on April 29 in the U.S. District Court for the Eastern District of Michigan, comes from law firm Hagens Berman and claims that vehicles with FCA’s 2.4-liter TigerShark MultiAir II engines consume abnormally high amounts of oil and can shut down unexpectedly during operation.

Vehicles said to be impacted include the 2015-2016 Chrysler 200, 2013-2016 Dodge Dart, 2016-2020 Fiat 500X, 2017-2020 Fiat Toro, 2014-2020 Jeep Cherokee, 2017-2020 Jeep Compass, 2015-2020 Jeep Renegade, and the 2015-2020 Ram ProMaster City.

“Owners of these vehicles are terrified of sudden, unexpected engine stalls, and left empty-handed by FCA dealerships and technicians who continue to ignore this serious safety hazard,” managing partner of Hagens Berman and attorney for vehicle owners in the class action, Steve Berman said. “It’s only a matter of time before this defect leads to a fatality, with millions of affected vehicles sold by FCA on the road.”

Owners of impacted vehicles have expressed concern about the excessive fuel consumption for many years. The issue has also been previously reported to the National Highway Traffic Safety Administration, with the lawsuit listing some of the complaints below:

“My car completely stalled as I was going to enter the ramp to the I10. It could have been very bad if it happened once I entered the I10. I had my 1 year old with me in the scorching hot sun of Tucson Arizona waiting for a tow truck.”

“…MAJOR flaw… My brand new Jeep shut off on me (WHILE DRIVING) several different times and I was told at the dealership that it was because I needed an oil change. My dash told me I had 30% left before it needed an oil change. It apparently has a mechanism that will detect either low oil or an oil change needed and just kill the engine… The car never gave an indicator. Any one else experience this huge and very serious issue?”

“Dealership said there’s been an issue with these using oil. 3 quarts in the first 3000 miles? Never heard of such a thing on a brand new vehicle.”

“I got an oil change and this morning while driving my car shut off again. I checked the oil dip stick and sure thing it had not one single drop of oil! How is that even possible? My car burns the oil completely! I just got an oil change 2 months ago!”

Read Also: FCA Struck By Another Recall, More Than Half A Million SUVs Affected

The lawsuit claims the sudden engine shutoffs could be avoided if FCA’s oil indicator system alerted drivers that their engine oil was running low but it doesn’t. Consequently, owners may only discover they are running low on oil when the engine cuts out.

“Rather than being honest about these problems, FCA has engaged in efforts to conceal them by describing the defects as ‘normal’ in a technical service bulletin,” according to the complaint, allowing the automaker “to avoid the inevitable economic fallout that would ensue from recalling the millions of affected vehicles”.

Hagens Berman is seeking monetary relief for owners of the affected vehicles as well as punitive damages against the automaker “for its fraud and gross negligence.”