I came across this article from Geno's Garage, which is an online retailer with lots of experience with Cummins and Eco-diesel engines (I own a RAM Cummins and buy my filters and stuff from Geno's). He notes that the Ecodiesel has a higher instance of repair reports on their DEF systems than does Cummins, but even the rates he mentioned are low:
I also looked at the same parts for the 3.0 EcoDiesel trucks and Jeeps, and the parts replacement rates far exceed the HD truck parts replacements. The numbers are 3.4% replacement rate for injectors, and 1.6% for pump modules. This is more than likely because of the high number of defective SCR’s in light duty trucks that got misdiagnosed first as bad DEF. Almost all, if not all, of the SCR’s are under warranty, so there is less incentive to properly diagnose the root cause since there is little chance FCA will deny the warranty claim.My friend who owns a RAM 1500 with the last gen Eco-Diesel has nothing but compliments. His only issue was after his ECU was reflashed as part of the diesel settlement issue, when his reported mileage dropped significantly. That concern was ameliorated by the settlement check he's getting from FCA.