Most common 2021 Ram 3500 problems
Share of the 62 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Ram 3500 complaints by model year
Best 3500 years: 2023, 2021, 2013. Years to avoid: 2018, 2017, 2022, 2025, 2014. Compare all years →
2021 Ram 3500 recalls (9)
Steering › Steering control module
Chrysler (FCA US, LLC) is recalling certain 2021-2022 Ram 1500, Ram 2500, Ram 3500, Ram 4500, and Ram 5500 vehicles. The steering column control module may cause the driver's side air bag not to deploy as intended.
Remedy: Dealers will replace the steering column control module, free of charge. Owner notification letters were mailed beginning December 11, 2025. Owners may contact Chrysler customer service at 800-853-1403.
Electrical system › Wiring › Relays/solenoids
Chrysler (FCA US, LLC) is recalling certain 2021-2023 Ram 2500, 3500, 3500 Cab Chassis, and 4500, 5500 Cab Chassis vehicles equipped with a Cummins 6.7L Turbo Diesel engine. An electrical short may occur in the heater grid relay with the ignition on or off.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the relay, free of charge. This will be a Phased campaign.
Structure › Body › Tailgate › Hinge and attachments
Chrysler (FCA US, LLC) is recalling certain 2019-2022 Ram 1500, 2500, and 3500 pickup trucks. The tailgate may not latch properly due to misaligned tailgate strikers, which could result in the tailgate opening while driving.
Remedy: Dealers will inspect the tailgate striker alignment to the box latch and adjust, if necessary, free of charge. Owner notification letters were mailed December 22, 2022.
Power train › Automatic transmission
FCA US, LLC (Chrysler) is recalling certain 2020-2023 Ram 2500 and 2020-2022 Ram 3500 vehicles. A build-up of pressure and heat inside the transmission may result in a transmission fluid leak from the dipstick tube.
Remedy: Dealers will replace the transmission dipstick and transmission vent assembly, free of charge. Owner notification letters were mailed December 29, 2022. Owners may contact FCA US, LLC customer service at 1-800-853-1403.
Electronic stability control (ESC)
Chrysler (FCA US, LLC) is recalling certain 2019-2022 Ram 2500 and 2021-2022 Dodge Durango vehicles, and 2019-2022 3500 cab chassis with GVWR less than 10,000 lbs. The ABS control module software may prevent the electronic stability control (ESC) malfunction indicator light from illuminating during certain conditions.
Remedy: Dealers will update the ABS control module software, free of charge. Owner notification letters were mailed March 29, 2022. Owners may contact FCA US, LLC customer service at 1-800-853-1403.
Air bags › Side/window › Curtain
Chrysler (FCA US, LLC) is recalling certain 2021-2022 Ram 2500, Ram 3500, and 2021 Ram 1500 Classic pickup trucks. The side air bag inflatable curtain (SABIC) assemblies may have been manufactured with the incorrect amount of compressed gas, which can result in an improper air bag deployment.
Remedy: Dealers will replace the SABIC assemblies, free of charge. Owner notification letters were mailed January 17, 2022. Owners may contact FCA US, LLC customer service at 1-800-853-1403.
Show 3 more recalls
Electrical system › Wiring › Relays/solenoids
Chrysler (FCA US, LLC) is recalling certain 2021-2022 Ram 3500, 2500 pickup trucks, and Ram 3500, 4500, and 5500 cab chassis vehicles equipped with Cummins 6.7L Turbo Diesel engines. An electrical short in the relay may cause a vehicle fire with the ignition on or off.
Remedy: Owners are advised to park these vehicles outside of buildings or structures, and not near other vehicles, until the vehicle has been remedied.
Wheels › Lugs/nuts/bolts/studs
Chrysler (FCA US, LLC) is recalling certain 2012-2021 RAM 3500, 3500 Cab Chassis, 4500 Cab Chassis, and 5500 Cab Chassis vehicles. Incorrect information in the Service and Owner's Manuals may cause the flanged lug nuts to be over-tightened, which could result in a broken wheel stud and possible wheel separation.
Remedy: Dealers will update the torque specification in the owner's manual and other published service documents. Dealers will also inspect the vehicle's wheel studs, replacing them if necessary, free of charge.
Electrical system
Chrysler (FCA US, LLC) is recalling certain 2021 Ram 2500, 3500, and 3500, 4500, and 5500 Cab Chassis vehicles equipped with a Cummins 6.7L Turbo Diesel engine. An electrical short may occur in the Solid State Intake Heater Grid Relay, which could result in a vehicle fire.
Remedy: Dealers will inspect and, if needed, replace the Solid State Intake Heater Grid Relay ("Relay"); if FCA US Recall ID Y08 (NHTSA Recall ID 21V-163) is open, then insulating material will be applied to the Relay after…
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2021 Ram 3500:
High pressure fuel pump failure
The Office of Defects Investigation (ODI) opened PE21-021 on October 14, 2021, to investigate incidents alleging a stall/loss of motive power as a result of high-pressure fuel pump failures in certain model year (MY) 2019-2020 Ram 2500, 3500, 4500, and 5500 heavy duty trucks equipped with 6.7L Cummins turbodiesel engines.
What 2021 Ram 3500 owners say
Electrical system
The contact owns a 2021 Ram 3500. The contact stated while driving 60 MPH, the check engine, cruise control, 4WD, stability control, the ABS and trailer brake warning lights were illuminated. The contact called the local dealer and made them aware of the failure. The dealer informed the contact to turn the vehicle on and off multiple times to reset the computer. The contact stated all the warning lights turned off, except for the check engine warning light. The contact stated two days later, the check engine warning light turned off independently. The contact stated that the failure recurred three times. The contact took the vehicle to the local dealer, where it was diagnosed with needing the rear passenger's side wheel speed sensor and the rear passenger's side ABS sensor to be replaced. The vehicle was repaired but continued to experience failure. …
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. When we contacted Stellantis to report the incident, they concluded their investigation they denied responsibility. A few months after the fact we received notice of the recall. To date we have not been reimbursed for the loss of the vehicle, our personal belongings in the vehicle, and the loss of income from no longer having the vehicle. …
Engine & cooling
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. In addition, the contact stated that the transmission was replaced by an independent mechanic. The failure occurred the following day after the vehicle was released by the independent mechanic. In addition, the owner of the vehicle had received a recall notification NHTSA Campaign Number: 23V060000 (Electrical System). The manufacturer was not made aware of the failure. …
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. When we contacted Stellantis to report the incident, they concluded their investigation they denied responsibility. A few months after the fact we received notice of the recall. To date we have not been reimbursed for the loss of the vehicle, our personal belongings in the vehicle, and the loss of income from no longer having the vehicle. …
Transmission & drivetrain
The contact owns a 2021 Ram 3500. The contact stated while the vehicle was parked, the contact noticed fluid on the ground underneath the vehicle. The contact inspected the vehicle and cleaned the oil pan. The contact determined that the fluid was not coming from the oil pan. The contact inspected the transmission dip stick and determined that the leaking fluid was coming from the transmission fluid reservoir. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure and a case was filed. The contact was informed of an unknown recall; however, the contact was informed that the VIN was not included in the recall. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 60,000.
The transmission's light came on saying that it was heated. I parked as soon as possible and that's when the flames were coming out of the hood. I did burned my hands trying to put out the fire with 3 fire extinguishers. I did not want my truck to burn. Now, the dealer is trying to say that they can't get a conclusion of what started the fire. The truck smells like burned transmission fluid. I sent pictures of the truck to the dealer. There is a recall in February 2020 with the same problem that I had with my 2021 Ram. Prior to this incident, the truck did not have any warnings or lights on.
Frequently asked questions
Is the 2021 Ram 3500 a good car?
Based on 62 owner complaints filed with NHTSA, the 2021 3500 rates average: 38% fewer complaints than a typical year of the 3500 at the same age. It is one of the best 3500 years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Ram 3500?
The electrical system — 17 complaints, 27% of all complaints for this model year. Next are the engine & cooling (13) and transmission & drivetrain (11).
How many recalls does the 2021 Ram 3500 have?
There are 9 recalls for the 2021 Ram 3500, the most recent from November 6, 2025 (steering control module). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Ram 3500?
The best years by complaints, compared at the same age, are 2023, 2021 and 2013. Years to avoid or approach with caution: 2018, 2017, 2022, 2025 and 2014. See the full Ram 3500 years comparison.
At what mileage do 2021 Ram 3500 problems happen?
The median mileage reported in complaints is about 60,000 miles; 45% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.