2021 RAM 3500 engine problems
10 owner complaints filed with NHTSA name the engine on the 2021 RAM 3500 — 16% of all complaints for this model year.
What owners report
“While driving my truck I noticed my mpg gauge was showing 0 mpg. Then I realized my "miles to go" gauge was reading "low" even though I had plenty of fuel in the tank and my fuel gauge was showing 3/4 full. Even though I use my truck as a commercial vehicle, and drive coast to coast, I was luckily…”
filed Nov 19, 2025
“The contact filed the complaint on behalf of the customer, who was the owner of a 2021 Ram 3500. The contact stated that while the owner was driving at an undisclosed speed, the vehicle caught on fire. No warning lights were illuminated. The owner informed the contact that the fire came from the…”
filed Nov 5, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Sensor - turbocharger speed
113744 · Service Bulletin/Repair Instructions · issued Jul 29, 2026
Engine problems in other 3500 years
| Year | Reports | Share |
|---|---|---|
| 2026 3500 | 2 | 9% |
| 2025 3500 | 1 | 3% |
| 2024 3500 | 5 | 13% |
| 2022 3500 | 23 | 12% |
| 2020 3500 | 25 | 22% |
| 2019 3500 | 21 | 16% |
| 2018 3500 | 15 | 2% |
| 2017 3500 | 28 | 9% |
| 2016 3500 | 21 | 16% |
| 2015 3500 | 27 | 20% |
| 2014 3500 | 29 | 14% |
| 2013 3500 | 27 | 24% |
Other reported problem areas on the 2021 RAM 3500
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.