Got an engine warning light while traveling. Our RV only has 67,000 miles on it. Cummins local dealer reports it is a Selective Catalyst Reduction (SCR) unit problem and unit needs a $10,000 replacement. This SCR is supposed to last 500,000 miles. Cummins refuses to cover the cost for this SCR repair even though Cummins issued a 2022-2024 voluntary recall acknowledging the problem_Cummins CR 2113. We never received a recall notice. Failure to replace will progressively lead to ghost error codes and eventually having the unit go into limp mode before stopping unexpectedly. Many people with this problem report a similar refusal by Cummins and some have been left on the side of the road when the unit fails because it is a difficult problem to diagnose.
2015 Dynamax DX3
Routine
Owners filed 1 complaints about this vehicle with federal regulators, most often about the fuel/propulsion system. No safety recall has been issued.
What fails
| Component | Reports | Crashes | Fires | Injuries | |
|---|---|---|---|---|---|
| Fuel/Propulsion System | 1 | 0 | 0 | 0 |
What owners reported
Newest filingsFuel/Propulsion System
Filed Jul 23, 2026AR
1 of 1 complaints, reproduced as filed.
Other Dynamax models
All Dynamax models →Reading this record
No unusual pattern of severe incidents in the complaint record.
Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.
Most recent recall on file: none. Source: NHTSA Office of Defects Investigation.