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EnginePart report

2021 Ram 3500 Engine Problems

Complaints
10about this part
Share
16%of 62 total for the year
Median mileage
99,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 10 complaints about the engine of the 2021 Ram 3500, 16% of the 62 complaints for this model year. Where a mileage was given, the median is 99,000 miles. 2 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Vehicle died in a busy intersection coming off the freeway. Light flashed that indicated it was an issue with the electronic throttle control. The safety of myself and others was put at risk due to the posted speed of the road and multiple lanes from 4 directions. I had to remain in my vehicle to make sure I was not hit by another vehicle and due to the vehicle issue, I was impeding traffic. Lithia Dodge of Grants Pass, OR stated they could not make an appt for the vehicle to get looked at for 2 weeks out, scheduled 8/22/25. …”

NHTSA complaint #11679340, filed 2025-08

“While driving my truck I noticed my mpg gauge was showing 0 mpg. Then I realized my miles to go gauge was reading low even though I had plenty of fuel in the tank and my fuel gauge was showing 3/4 full. Even though I use my truck as a commercial vehicle, and drive coast to coast, I was luckily only a couple hours from home, so I kept driving to try to make it home. I did make it home, but during that time, my check engine light came on along with my low fuel warning light. I also realized during that time that my odometer had stopped working. It wasn't showing any numbers at all. …”

NHTSA complaint #11700252, filed 2025-11

“Our vehicle was involved in a total loss fire from the engine compartment while driving. We were driving the unit and noticed smoke, when we were merging to pull of the road flames started coming up and we immediately exited the vehicle and had to run, because it started popping. We were lucky to escape unharmed physically, but the situation could have been much worse. There were no indications or lights warning of engine failure or fire. This occurred on September 2, 2021. At this point in time there were no recalls on the vehicle. …”

NHTSA complaint #11462482, filed 2022-04

“The contact filed the complaint on behalf of the customer, who was the owner of a 2021 Ram 3500. The contact stated that while the owner was driving at an undisclosed speed, the vehicle caught on fire. No warning lights were illuminated. The owner informed the contact that the fire came from the engine bay. The fire department arrived and extinguished the fire. A police report was filed. The vehicle was taken to a local tow yard. The vehicle was later towed to the independent mechanic. No injuries were sustained. …”

NHTSA complaint #11697674, filed 2025-11, 99,000 miles

“When coming to a complete stop and the brake fully pressed down, the truck will lunge forward and almost hit the car in front of me. Then the trucks idle will reduce and it will start to shake. Several people have reported this issue on this year vehicle. Many people have stated that it is due to a faulty solenoid Torque Converter Clutch (TCC). Please investigate as this could cause a serious accident if the truck lunges and hits a pedestrian in the crosswalk.”

NHTSA complaint #11522492, filed 2023-05

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2026311%
202537%
2024613%
2023318%
20222312%
20211016%
20202723%
20192216%
2018152%
2017289%
20162116%
20152820%
20142914%
20132723%
2007117%

Other parts of the 2021 Ram 3500

Electrical system
17 complaints
Transmission and drivetrain
11 complaints
Other or unknown
9 complaints
Wheels
7 complaints
Brakes
6 complaints
Fuel system
5 complaints
Body and structure
5 complaints
Back-over prevention (rear camera)
3 complaints
Engine cooling
3 complaints
Exterior lighting
3 complaints
Tires
3 complaints
Suspension
2 complaints

← All problems reported for the 2021 Ram 3500

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology