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What 60 owners told NHTSA about the 2015 Ram Promaster (passenger Double Seat)

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (60)Crash / fire / injury (2)Electrical system (16)Engine (16)Transmission & drivetrain (12)Brakes (10)Engine & cooling (3)Fuel system (3)Speed control (3)Body & structure (2)Electronic Stability Control (esc) (2)Lights (2)

3 of 60 complaints match · Engine & cooling · clear filters

Apr 13, 2026Engine & cooling

See Attached Letter

NHTSA ODI 11730843

Dec 31, 2025Engine & cooling

The contact owns a 2015 Ram Promaster 3500. The contact stated that while driving 70-75 MPH, the DEF warning light was illuminated. The contact added DEF fluid to the tank and continued driving; however, a message indicating that the vehicle was in countdown mode or LIMP mode was displayed. The vehicle was taken to the dealer to be diagnosed; however, the dealer had informed the contact that the cause of the failure could not be determined after performing several tests. The vehicle remained stuck in LIMP mode and had remained at the dealer unrepaired for two months. The manufacturer was notified of the failure, and the contact requested an engineer's assistance in diagnosing the vehicle. A case was filed, but no assistance was provided. The contact stated that the vehicle was essential to get to several doctors' appointments after he had undergone surgeries. The failure mileage was approximately 98,000.

NHTSA ODI 11707980

Jun 27, 2020Engine & coolingElectrical system

MY EXACT VEHICLE RAM PROMASTER I4 3L TURBO DIESEL WITH FACTORY AIR IS ON A SAFETY RECALL FOR BAD COOLANT FAN, BUT CHRYSLER IS SAYING THAT MY VIN DOES NOT QUALIFY. THE CHRYSLER DEALER TELLS ME I NEED TO REPLACE MY COOLING FAN BECAUSE IT IS SHORTING AND BLOWING THE FUSE AND POSSIBLY AFFECTING THE RELAY ALSO. THIS FAN CODE IS ALSO PUTTING THE VAN IN LIMP MODE AND NOT ALLOWING THE DIESEL PARTICULATE FILTER TO BE REGENERATED. HERE IS THE LINK FOR RECALL THAT I FOUND HTTPS://STATIC.NHTSA.GOV/ODI/RCL/2019/RCMN-19V818-7563.PDF PLEASE HELP OR AT LEAST LET ME KNOW WHAT RECOURSE I HAVE - IT'S PRETTY OBVIOUS THIS FAN HAS ISSUES AND 2015 WAS ONE OF THE 1ST. - THE WHOLE ENGINE AND EMISSIONS IS TIED TOGETHER BY THE COMPUTER AND SENSORS SO 1 THING AFFECTS MANY THANKS [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

NHTSA ODI 11331218

Working with the data? Download all 60 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2015 Ram Promaster (passenger Double Seat) verdict →