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New lawsuit states Ram fuel pump is ‘imminent safety risk’


We recently reported on a voluntary recall by Stellantis, formerly Fiat Chrysler Automobiles (FCA), involving more than 130,000 Ram heavy-duty trucks due to a potential fire hazard. Now, a class action lawsuit against the truck manufacturer cites an “imminent safety risk to the public” as it relates to this issue, which involves the Ram diesel CP4 fuel injection pump.

According to an investigation by Hagens Berman, the law firm involved in this latest class-action suit, this fuel pump essentially leaves vehicle owners driving “ticking time bombs.” Furthermore, it states potentially impacted owners could suffer sudden and unexpected shutoff of the vehicle’s engine while it is in motion.

These are the same CP4 fuel injection pumps that were part of a class-action lawsuit filed in 2019 involving GM’s heavy-duty Duramax trucks. In fact, Hagens Berman is soliciting owners of GM and Ford trucks that have the Bosch CP4 fuel injector to be potentially added onto this particular class-action suit.

Vehicles currently affected by the Stellantis recall are the 2019 and 2020 Ram 2500 and 3500 heavy-duty pickups as well as the Ram 3500, 4500 and 5500 chassis cab trucks equipped with 6.7-liter Cummins turbodiesel engines. According to Hagens Berman, the recall covers an estimated 222,410 vehicles in the U.S., 20,539 in Canada and 3,525 in other markets outside of North Americas.

However, Stellantis claims the recall affects less than that with 131,177 heavy-duty trucks impacted.

“In our view, Fiat Chrysler’s massive global recall of the same trucks included in our lawsuit is a smoking gun,” said Steve Berman, managing partner of Hagens Berman and attorney representing affected truck owners.

“The important part we want truck owners, regulators and the public to know is that this defect poses a significant risk to the safety of drivers of Dodge Ram trucks and others sharing the road,” Berman said. “Failure of the fuel system from this defect causes sudden and unexpected shutoff of the vehicle’s engine while in motion and an inability to restart the vehicle – serious events that could lead to injury or fatalities.”

Bosch CP4 fuel pump

The basis of the lawsuit is a defect with the Bosch-supplied CP4 high-pressure fuel injection pump.

According to information provided by the law firm: “Bosch’s CP4 pump was never compatible with American fuel standards and not built to withstand the specifications for U.S. diesel fuel in terms of lubrication or water content. As a result, the pump is forced to run dry and destroy itself as air bubbles allow metal to rub against metal. The pump secretly deposits metal shavings and debris throughout the fuel injection system and the engine.”

About the class-action lawsuit

The lawsuit, filed Oct. 22, 2021, in the U.S. District Court for the Eastern District of Michigan, states the defect leaves vehicle owners at risk of sudden and unexpected engine shutoff while in motion. The lawsuit accuses the automaker and engine manufacturer of colluding to conceal the critical Ram fuel pump defect and its safety risk, affecting roughly 600,000 owners and lessors.

The lawsuit says FCA, Stellantis and Cummins knew Bosch’s CP4 pump design was incompatible with American diesel fuel, and costs to repair each vehicle are at least $10,000.

Hagens Berman has filed six other class-action lawsuits against Ford, FCA and GM concerning the dangerous CP4 fuel injection pump in other diesel trucks.

Information on the lawsuit can be viewed on Hagens Berman’s website.

The bottom line on the Ram fuel pump

There’s a lot of bombastic quotes and accusations here coming from the side of the attorneys, which is pretty standard for law firms. We don’t believe the recall from Stellantis is a “smoking gun” or an admission of guilt. It was the right thing to do.

Conversely, this situation and the lawsuit warrants watching and we for sure will be reporting on this as more shakes out from it. Will GM and Ford heavy duty trucks get thrown in the mix too?

Leave us your comment below if you have been impacted by this or have concerns.

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Jimmy Dinsmore

Jimmy is News Editor for PickupTruckTalk with an expertise in new vehicles. He is also a Ford Mustang historian having authored the book Mustang by Design (available on Amazon). His second book, about the history of Ford's F-Series truck comes out next year.

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  1. Jon Kindred November 22, 2021

    I have a 2019 f250. I was not aware of this problem when i bought my truck. Since i have bought it i have learned about this pump and has been a constant worry of mine. Every time i drive it i worry about it. I should not have to run an additive every tank of fuel. Fuel is expensive enough without that added cost. I think these vehicle manufacturers should have to remedy this situation. The people buying these trucks should not be stuck to deal with this. Especially when they are allowed to blame it on poor fuel that we are forced to run living in the states

  2. Julio Sandoval March 22, 2022

    Im own a 2019 ram 3500 with this recall .i was driving in the interstate 40 and almos been hit by 18wheeler due to power reduction take it to the draler and said have to replace all my fuel sistem because a put dity diesel in it they should me anpic wiyh a jar with diesel and a rusty solution ..i request to see the diesel tank and have to be removed with me in person next day a dont redive a call and truck had the tank removed with a small amount of the rusty solution in it 3drops i have it onnvideo .when i find out than they try me to charge for the repairs a requested my truck and the full history and diagnosis .they give me the truck back but they denaime the diagnosis and history and walkme out the dealer THEY TRY TO SCAM ME AND MAKE ME PAY FOR A RECCAL

  3. Tara F. September 11, 2022

    My husband has a 2019 Ram 3500 and the fuel pump failed while my husband was driving he lost all power while driving home through Indiana and had to get it towed in a dealer. We live in AZ and he has been stuck in Indiana for 4 weeks the dealer states they can’t find a pump nationwide I have a case open with Ram care and they are stating the same thing. The pump shot metal all through the fuel lines so we need to replace injectors, pump, fuel lines and the tank, the dealer and Ram care have been the worst help half the time the service manager we are dealing with “isn’t there” or doesn’t return calls same thing with the case manager. We are stuck in a situation where if we didn’t use that truck to make a living we would have lemon lawed it by now. If anyone else has found a way around this please reply back so I can get him back home.


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