2018 Newmar Dutch Star Engine Problems
- Complaints
- 8about this part
- Share
- 50%of 16 total for the year
- Median mileage
- 7,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the engine of the 2018 Newmar Dutch Star, 50% of the 16 complaints for this model year. Where a mileage was given, the median is 7,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Def system for diesel engine started to fail causing reduction in performance of motor home. If I had not been able to get directly to a freightliner service center, I would have ended up on the interstate able to go only five miles per hour and needing to be towed. This is an on going known problem with these engines manufactured by cummins. This particular part is failing on a regular basis across many chassis makers causing a potential danger to the owners of these coaches. The particular part is called a def head that regulates and meters the pollution reducing def fluid. …”
NHTSA complaint #11354474, filed 2020-09, 10,000 miles“Check engine light came on, contacted cummins with code. I was told the def head needed to be replaced. Motorhome had 5211 miles. Made an appointment and had head replaced”
NHTSA complaint #11386835, filed 2021-01, 5,000 miles“Shortly after departing from J&J RV Park in Hot Springs, Arkansas, in my vehicle, a motorhome, two yellow check-engine lights illuminated on the dashboard. I continued driving for 52 miles to my next destination, Downtown Riverside RV Park in North Little Rock, Arkansas. The engine ran normally, and I arrived safely. I checked the vehicle's computer system on the dashboard and located three trouble codes: 3364, 1761, and 3031. …”
NHTSA complaint #11421702, filed 2021-06“We got the check engine light on after starting up our coach on July 6. We got several fault codes: SPN 3364 FMI 9, SPN 1761 FMI 9, SPN 3031 FMI 9. The codes indicated that we had a faulty DEF Header and it needed to be replaced. And if we drove the coach at some point it would derate to 5 miles an hour and we would not be able to drive it. We were told by the chassis maker (Spartan) that we would likely not be able to get a replacement part until September or October due to the global microchip shortage. …”
NHTSA complaint #11425312, filed 2021-07“The failure has occurred in the emission system. The DEF SENSOR set off 2 Check Engine light warnings on the dash. It did not tell me any other information. I was fortunate to return from my trip without incident. However, after speaking with the chassis manufacturer (Spartan), I was fortunate to be able to continue. Had I gone any further the engine would have begun a shutdown leaving my 24 ton RV stranded roadside. It could have been very serious breakdown on a metro highway causing major traffic jams or left stranded in a remote location. …”
NHTSA complaint #11425265, filed 2021-07Related service bulletins
- 10121940Sep 21, 2017Daimler Trucks North America has issued field service campaign SF543A. In response, Newmar is publishing TSB 493. Issue: On specific vehicles equipped with Stoneridge light bar…
Engine: other model years
Other parts of the 2018 Newmar Dutch Star
4 complaintsOther or unknown
3 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsFuel system
1 complaintsTires
1 complaints
← All problems reported for the 2018 Newmar Dutch Star
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology