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What 4 owners told NHTSA about the 2021 Ram Promaster 1500

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (4)Equipment (1)Transmission & drivetrain (1)

Newest first · 4 complaints

Apr 29, 2024

This vehicle was transformed into a Solis Pocket 36A motorhome by Winnebago in 2022. This, as well as many others converted by Winnebago in 2023 abs 2024 as well, contains a propane tank, heater, and 2 burner stovetop. They used Teflon tape on propane connections. This, as reported by another owner, is a safety and health issue. They should have used the yellow Teflon for propane, not the white one used in water connection. Eventually, the white weaker tape will wear and cause gad leak, which is a fire danger. And can cause health issues. This was reported by several owners on the fb group: [XXX] Winnebago had obviously made this mistake for at least 3 years! They need to issue a safety recall! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11585986

Mar 13, 2024Transmission & drivetrain

The contact owns a 2021 Ram Promaster 1500. The contact received notification of NHTSA Campaign Number: 23V301000 (Power Train) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was contacted and confirmed that parts were not yet available. The manufacturer was contacted several times and were unable to confirm when parts would become available. The contact stated that the vehicle was taken to the dealer to have the recall repaired; however, the contact was informed that a replacement transmission was not available to repair the vehicle. The contact stated that sixteen days later, the contact was informed that the transmission was shipped to be rebuilt. The manufacturer was not made aware of the failure. The approximate failure mileage was 37,000. Parts distribution disconnect.

NHTSA ODI 11577184

Mar 7, 2024Equipment

The contact owns a 2021 Ram Promaster 1500. The contact stated that while driving at an undisclosed speed, the solar panel fractured and detached from the vehicle. The failure occurred while the contact was on vacation and driving at night. The contact stated that the vehicle was converted into an RV that was manufactured by Thor Motor Coach. The RV was taken to an independent mechanic. The new solar panel was replaced, and the vehicle was repaired. The contact later researched and notice that the failure was like NHTSA Campaign Number: 23V759000 (Equipment). The manufacturer was not made aware of the failure. The failure mileage was approximately 15,000.

NHTSA ODI 11576050

Sep 29, 2023

The rear backup camera does not work correctly. The picture is of the floor and not the obstacle directly behind the vehicle. Also, the grid lines that assist in parking no longer appear. Yes - this vehicle is available for inspection. It is a safety issue because I do not have a rear window and so I cannot see a person, vehicle or obstacle directly behind me when I am in reverse. I can potentially cause injury to myself or others when I am in reverse. The dealer has seen the problem but will only diagnose the problem for $150. The vehicle has not been inspected by the manufacturer, police, insurance or anyone else. There was no warning lamp, message or other symptom prior to the failure. The failure appeared right around 36,000 miles just as it was going out of the warranty period.

NHTSA ODI 11547439

Working with the data? Download all 4 complaints as CSV · fetched from NHTSA July 14, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 Ram Promaster 1500 verdict →