2021 RAM Promaster problems & reliability
109 owner complaints filed with NHTSA for the 2021 RAM Promaster, alongside 8 safety recall campaigns. Last verified Sep 21, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several components.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Back Over Prevention → | 24 | 22% |
| Unknown / Other | 21 | 19% |
| Electrical System → | 19 | 17% |
| Lane Departure → | 14 | 13% |
| Power Train → | 12 | 11% |
| Service Brakes | 8 | 7% |
| Engine and Engine Cooling | 7 | 6% |
| Wheels | 7 | 6% |
| Engine | 6 | 6% |
| Seat Belts | 6 | 6% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 21 reported components →Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Among the 20 complaints that included a usable odometer reading, the median reported incident mileage was 27,000 miles (middle 50% between 9,442 and 48,500 miles).
Complaints by incident year
What owners report
“The fuel tank is leaking where the fuel tube goes into the tank. The seal starts to leak and they do not make a replacement seal, you have to replace the entire fuel tank. This is the 2nd Promaster van that I have had and the 2nd time this has happened. This is dangerous to have fuel leaking from the front of the…”
Fuel/propulsion System · filed Sep 7, 2026
“The contact owns a 2021 Ram Promaster 3500. The contact received notification of NHTSA Campaign Number: 25V552000 (Back Over Prevention). The vehicle was taken to the dealer; however, the dealer declined to complete the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a…”
Back Over Prevention · filed Aug 17, 2026
“Vehicle experienced severe, premature component failures posing direct safety hazards while operating a commercial work van: 1. Parking Brake Seizure (01/25/2025 @ 49,197 miles): The parking brake pivot assembly completely seized, causing the rear brake assembly to lock up and rendering the vehicle unsafe to operate…”
Power Train · filed Jul 27, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
195 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2021 RAM Promaster. The 10 most recent:
Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S1623000028 Rev. K · Service Bulletin/Repair Instructions · issued Jun 12, 2026
Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S1623000028 REV.J · Service Bulletin/Repair Instructions · issued Jun 5, 2026
Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S1623000028 REV.I · Service Bulletin/Repair Instructions · issued May 29, 2026
Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S1623000028 REV.H · Service Bulletin/Repair Instructions · issued Apr 1, 2026
Water Leak From Roof Area.
S2623000019 · Service Bulletin/Repair Instructions · issued Mar 27, 2026
Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning…
S1408000384 REV.J · Service Bulletin/Repair Instructions · issued Mar 4, 2026
WATER PUMP
110447 · Service Bulletin/Repair Instructions · issued Feb 23, 2026
WATER PUMP
110448 · Service Bulletin/Repair Instructions · issued Feb 23, 2026
Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes (DTCs), or Battery Warning…
S1408000384 REV.I · Service Bulletin/Repair Instructions · issued Feb 14, 2026
D-25-17 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements
109621 · Warranty Program/Extension · issued Jan 21, 2026
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2021 RAM Promaster has 8 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2021 RAM Promaster?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Among complaints with usable mileage, the median reported incident mileage was 27,000 miles. This does not predict when a particular vehicle will develop a problem.