2021 Ram 2500: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 28 owner complaints for the 2021 Ram 2500 that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11763494 (filed 09/10/2026): “I am writing to formally follow up regarding complaint/case number 97989810 through dodge and to request that this matter be elevated for a complete technical review concerning my 2021 ram 2500 6.7l cummins, vin [xxx]. time - line prior factory-warranty repair the xxx factory-warranty repair is an…”
- NHTSA complaint ODI #11753967 (filed 07/31/2026): “The contact owns a 2021 ram promaster 2500. the contact received notifications of nhtsa campaign numbers: 25v552000 (back over prevention) and 25v720000 (engine and engine cooling); however, the parts to do the recall repairs were unavailable. the contact stated that the manufacturer had exceeded a …”
- NHTSA complaint ODI #11726100 (filed 03/21/2026): “Vehicle caught fire while engine was running, vehicle idling. vehicle is a total loss. prior nhtsa complaints regarding these vehicles causing fire from electrical components under the hood. unknown if fire was due to electrical or leaking fuel issues under the hood. major safety risk to occupants…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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