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U.S. public vehicle records

2021 Ram PROMASTER problems and owner complaints

Explore the records behind recurring owner reports.

Key facts

109 owner complaints analyzed

8 distinct recall campaigns

20,000 mi median reported failure mileage

Scope: 2021 model year. Data snapshot: . 21 complaints include usable failure mileage.

Owner-reported patterns

Most common problems

Unknown Or Other is the most frequently named component, appearing in 21 of 109 complaints (19.3%). A complaint can name multiple components.

Recurring terms in complaint narratives
TopicMatching reportsShare of complaints
Braking behavior1211.0%
Transmission and shifting109.2%
Steering behavior65.5%
Electrical and battery issues54.6%
Engine operation32.8%
Fuel system concerns32.8%

Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.

Component breakdown

Number of unique complaints naming each component. Top eight shown.

Unknown Or Other
21
Back Over Prevention
19
Electrical System
17
Lane Departure: Blind Spot Detection
14
Power Train
11
Service Brakes
8
Engine And Engine Cooling
7
Wheels
7
Component breakdown data
CategoryCount
Unknown Or Other21
Back Over Prevention19
Electrical System17
Lane Departure: Blind Spot Detection14
Power Train11
Service Brakes8
Engine And Engine Cooling7
Wheels7

Unknown Or Other: 21; Back Over Prevention: 19; Electrical System: 17; Lane Departure: Blind Spot Detection: 14; Power Train: 11; Service Brakes: 8; Engine And Engine Cooling: 7; Wheels: 7

Reported problems by failure mileage

Complaint counts in mileage bands. These are not failure rates per vehicle or mile.

Under 25,000
11
25,000 to 49,999
5
50,000 to 74,999
2
75,000 to 99,999
2
100,000 to 149,999
1
150,000 and above
0
Reported problems by failure mileage data
CategoryCount
Under 25,00011
25,000 to 49,9995
50,000 to 74,9992
75,000 to 99,9992
100,000 to 149,9991
150,000 and above0

Under 25,000: 11; 25,000 to 49,999: 5; 50,000 to 74,999: 2; 75,000 to 99,999: 2; 100,000 to 149,999: 1; 150,000 and above: 0

Under 25,000 miles has the most reports with usable mileage (11). 88 complaints have missing, zero or invalid mileage.

Complaints over time

Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.

2021
11
2022
19
2023
14
2024
16
2025
17
2026
32
Complaints over time data
CategoryCount
202111
202219
202314
202416
202517
202632

2021: 11; 2022: 19; 2023: 14; 2024: 16; 2025: 17; 2026: 32

Pattern summary

Unknown Or Other leads the component reports. Braking behavior appears in 12 complaint narratives. Transmission and shifting appears in 10 complaint narratives. Steering behavior appears in 6 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.

Calculated from recorded counts. An AI narrative has not been published for this selection.

Complaint evidence

Examples provide context, not a representative sample or a verified diagnosis.

Owner report 11430380 · 2021-08-24 (August 24, 2021)

On August 5, I descended on California Highway 88 East from the Carson Pass; less than 1 mile down a warning appeared to “Service Brake System”. The warning disappeared but the “brake” light on the instrument cluster remained on. I took the vehicle to Carson Dodge on August 6. The dealer performed diagnostics and made two repairs based on generated codes (C1223-68 & P0556). I picked it up on August 13 and drove about 200 miles; the warning re-appeared each time I drove it. I returned the vehicle to Carson Dodge on August 16. The “brake…

Owner-reported narrative. Look up ODI 11430380 at NHTSA ↗

Owner report 11466828 · 2022-05-31 (May 31, 2022)

Most times when going down long grade over 6 + percent a dash warning comes on about service brake system. Once we get to flat area and turn ignition off the message goes away. We haven't had an issue braking. We are on Facebook group with other promaster 3500 and over 80 other similar vehicle owners stated this happens to them. Everyone says it's a "known problem" and not an issue and just ignore. We are worried what happens if it really is a problem. It happens every time we do mountain driving. I'd say over 10 times this year.

Owner-reported narrative. Look up ODI 11466828 at NHTSA ↗

Owner report 11583142 · 2024-04-15 (April 15, 2024)

The Transmission in these vehicles have been known to fail. This is just one of 38 in our fleet. Currently there are 8 of these vehicles at dealerships with transmission problem. We also have 4 more now that have to wait for dealerships to have room for them. Between the 2 dealerships within 6 miles of our business headquarters, they currently have almost 70 ProMasters with transmission problems and can only fix one at a time due to lack of parts. Some wont shift out of first, some wont shift into drive at all, and only work in reverse. The da…

Owner-reported narrative. Look up ODI 11583142 at NHTSA ↗

Owner report 11614461 · 2024-09-13 (September 13, 2024)

The contact owns a 2021 Jayco Swift RV built on a 2021 Ram Promaster 3500 Chassis. The contact stated that while driving downhill at an undisclosed speed, the transmission failed to shift out of low gear, and the RPMS were significantly high. The vehicle was taken to the dealer, where it was determined that the motorhome standard weight had exceeded the transmission and engine capacity. The contact stated that the only equipment that was added to the RV standard weight was a spare tire. The vehicle was not repaired. The manufacturer was not not…

Owner-reported narrative. 20,000 miles reported. Look up ODI 11614461 at NHTSA ↗

Owner report 11455402 · 2022-03-06 (March 6, 2022)

The vehicle that I have is the very short wheelbase of the Ram Promaster, the 118” one which is shorter than anything that Ford Transit of Sprinter has. The issue is that the steering is horribly sensitive, meaning that if you move the steering wheel even a tiny bit the vehicle moves a lot. It is similar to the old days of those short wheelbase Jeeps and you hear of people complaining in about steering themselves off the road. I also own a short vehicle being a Volvo XC60 but that is fine compared to this. The safety issue here, is that …

Owner-reported narrative. Look up ODI 11455402 at NHTSA ↗

Owner report 11615756 · 2024-09-21 (September 21, 2024)

The component that failed/malfunctioned is the CV axle, the part is no longer available for inspection. The safety risk posed is loss of control of the vehicle, subsequent damage to other vital steering and stability parts such as the wheel bearings, axles, alignment, and lower ball joint. The problem has been confirmed by a RAM dealership, and corrected under an extended warranty. The component has not been inspected outside of the RAM dealership technicians and potentially the warranty provider. There were no warning lights or indicators from…

Owner-reported narrative. Look up ODI 11615756 at NHTSA ↗

Owner report 11428036 · 2021-08-06 (August 6, 2021)

August 6, 2021 NHTSA Safety Issue ID: 21V3960000 As a first-time purchaser of an RV, what I had hoped would be an answer to some of my life’s difficulties has turned out to be a nightmare. I walked into nothing less than a predatory vehicle purchasing experience with General RV in Ashland VA and the worst customer care experience ever from Thor Motor Coach, based in Elkhart, IN. Currently, I am stuck with a brand new 2022 Thor Scope Class B RV that has been sitting in my driveway since the day I purchased it on June 29th, 2021. Between July…

Owner-reported narrative. Look up ODI 11428036 at NHTSA ↗

Owner report 11431120 · 2021-08-30 (August 30, 2021)

RV build from Forest River/Coachmen. Nova model. Inverter settings were incorrect from the factory. This in turn caused too much voltage to go to house battery. House battery was then out gassing hydrogen into the coach. This hydrogen collected inside and was setting off the CO detector.

Owner-reported narrative. Look up ODI 11431120 at NHTSA ↗

Owner report 11423695 · 2021-07-07 (July 7, 2021)

Vehicle bottomed out and lodged on concrete entering driveway. Thor Scope Ram Promaster 1500 Chassis sits low and Thor installed Cummins Onan generator and 2 Trojan batteries under the chassis, that sit 2 or more inches below the rear axle against the Cummins install guidelines. The generator needs 6 to 8 inches for ventilation according to manual and RV mechanics. Both generator and batteries collocated together coming in contact with road debris, objects, water on roadways may cause critical failure of systems resulting in hazardous condition…

Owner-reported narrative. Look up ODI 11423695 at NHTSA ↗

Owner report 11491368 · 2022-10-28 (October 28, 2022)

The contact owns a 2021 Ram Promaster. The contact stated while driving at an undisclosed speed, the vehicle stalled without warning. The vehicle was taken to the dealer where there were no codes retrieved; however, the contact was informed that the failure was related to the power control module. The vehicle was not repaired. The vehicle was taken to Chapman Dodge Chrysler Jeep Ram Scottsdale (3800 89th St, Scottsdale, AZ 85251, (480)424-3559) and Tempe Chrysler Jeep Dodge (7975 S Autoplex Loop, Tempe, AZ 85284, (480)496-4000) however, the mec…

Owner-reported narrative. 6,000 miles reported. Look up ODI 11491368 at NHTSA ↗

Owner report 11740172 · 2026-05-26 (May 26, 2026)

I had NHTSA recall for this generator done (23E-030) which was to solve the same problem I just had. Apparently, they just moved to a smaller diameter fuel line to fit the fuel pump better. However, this hose also came off my Cummins generator fuel pump and was spewing gas all over the generator and the ground when we ran it. This is a very unsafe condition and I'm surprised, after the recall was performed by a certified Cummins dealer (verified by Cummins) that this "new" fuel line has also come off the fuel pump.

Owner-reported narrative. Look up ODI 11740172 at NHTSA ↗

Owner report 11756268 · 2026-08-11 (August 11, 2026)

fuel tank leaking gasoline. vapors and liquid gasoline leaking from fuel tank

Owner-reported narrative. Look up ODI 11756268 at NHTSA ↗