2015 RAM 2500 engine problems
34 owner complaints filed with NHTSA name the engine on the 2015 RAM 2500 — 16% of all complaints for this model year.
What owners report
“On two separate occasions, once in 2025 and again in July 2026, while pulling a travel trailer an emissions control fault in the EGR system caused the Cummins turbo diesel engine in the truck to lose power. At this reduced power, highway speeds could not be maintained, and even small hills were…”
filed Jul 29, 2026
“Mopar has discontinued parts for many Ram vehicles with a 6.4L Hemi motor including the exhaust manifolds. My exhaust manifold is currently cracked and has an audible leak. Exhaust enters the cab of the vehicle when starting, idling, or reversing. They have no indication of providing a fix for this…”
filed Aug 18, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- These water pumps may leak coolantCampaign 17V562000 · Sep 12, 2017
Related service bulletins
Bearing - crankshaft thrust and kit
112906 · Service Bulletin/Repair Instructions · issued Jun 17, 2026Bearing - crankshaft thrust and kit
112906 · Service Bulletin/Repair Instructions · issued Jun 17, 2026
Engine problems in other 2500 years
| Year | Reports | Share |
|---|---|---|
| 2026 2500 | 4 | 19% |
| 2025 2500 | 7 | 12% |
| 2024 2500 | 8 | 15% |
| 2023 2500 | 11 | 23% |
| 2022 2500 | 29 | 17% |
| 2021 2500 | 25 | 24% |
| 2020 2500 | 33 | 20% |
| 2019 2500 | 31 | 16% |
| 2018 2500 | 36 | 1% |
| 2017 2500 | 37 | 5% |
| 2016 2500 | 53 | 21% |
| 2014 2500 | 61 | 18% |
Other reported problem areas on the 2015 RAM 2500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.