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What 40 owners told NHTSA about the 2020 Ram Promaster (passenger Single Seat)

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 (40)Crash / fire / injury (3)Backup camera & sensors (10)Transmission & drivetrain (10)Electrical system (7)Engine (4)Engine & cooling (4)Visibility & wipers (4)Steering (3)Seat belts (2)Airbags (1)Brakes (1)

1 of 40 complaints match · Brakes · clear filters

Mar 31, 2023Brakes

The contact owns a 2020 Ram 3500. The contact stated that while driving about 70 mph there was a thumping noise originating from the rear passenger side. The vehicle was veered to the side of the road and inspected. On another occasion when the vehicle was reversing a crunching sound was heard emanating from the rear passenger side. The vehicle was towed to a dealer where the emergency brake was replaced. The manufacturer was notified of the failure. The failure mileage was 20,940.

NHTSA ODI 11514837

Working with the data? Download all 40 complaints as CSV · fetched from NHTSA July 20, 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 2020 Ram Promaster (passenger Single Seat) verdict →