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What 37 owners told NHTSA about the 2018 Ram Promaster 3500

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 (37)Crash / fire / injury (4)Electrical system (11)Engine (11)Transmission & drivetrain (7)Visibility & wipers (4)Brakes (3)Body & structure (2)Steering (2)Tires (2)Airbags (1)Electronic Stability Control (esc) (1)

1 of 37 complaints match · Electronic Stability Control (esc) · clear filters

Oct 15, 2024Electronic Stability Control (esc)EngineTransmission & drivetrain

The contact owns a 2018 Ram Promaster 1500. The contact stated that while driving at an undisclosed speed, the service Hill Holder, Electronic Stability Control and check engine warning lights illuminated. The vehicle was taken to a local dealer where it was diagnosed with codes HAF, DTC, P0740, TCC clutch performance, and metal debris found in the transmission fluid. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 85,000.

NHTSA ODI 11619797

Working with the data? Download all 37 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 2018 Ram Promaster 3500 verdict →