Own a FCA truck with a Bosch CP4 fuel pump? Have you had to replace your vehicle's fuel pump or engine?
A dangerous defect is causing metal shavings to leak into your vehicle, leading to catastrophic failure and costly repair bills. You may be entitled to reimbursement. Fill out the form to find out your rights »

Case Status
U.S. District Court for the Eastern District of Michigan
Case Number
FCA US LLC, f/k/a Chrysler Group
Stellantis N.V.
Cummins Inc.
File Date


According to the firm's investigation, a defect in FCA diesel CP4 fuel pumps essentially leaves vehicle owners driving “ticking time bombs,” according to the class-action lawsuit, with the potential for owners to suffer sudden and unexpected shutoff of the vehicle’s engine while it is in motion.

Hundreds of thousands of Dodge RAM trucks are installed with the defective fuel pump that can suddenly fail without warning, causing a total fuel system failure and consequential engine failure resulting in an outrageously expensive repair bill. The defendants are also refusing to fix the trucks under warranty. Additionally, repairs are fruitless, as no repair will fix the issue as long as the vehicle with the CP4 is being filled with U.S. diesel.


The basis of this defect is the Bosch-supplied CP4 high pressure fuel pump.

Unbeknownst to truck owners, 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 system and the engine.


Hagens Berman believes that consumers have the right to replacement costs of vehicle parts and deserve a real answer from FCA. We think that consumers shouldn't have to suffer for their errors that are causing undue wear and tear to the engine and fuel pump, and at worst leading vehicle owners into a highly dangerous emergency situation.


Hagens Berman is one of the most successful auto litigation law firms in the U.S. and is presently leading nationwide cases against FCA, Ford, GM, Volkswagen and Mercedes for safety defects, emissions-cheating and negligence, and your claim will be handled by attorneys experienced in automotive consumer law.


There is no cost or fee whatsoever involved in joining this case. In the event Hagens Berman or any other firm obtains a settlement that provides benefits to class members, the court will decide a reasonable fee to be awarded to the class' legal team. In no case will any class member ever be asked to pay any out-of-pocket sum.

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