There are 13 owner-reported engine complaints for the 2021 Ram 2500in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Ram is refusing to repair and item on my truck egr cooler is cracked, leaking and burning coolant. They have recalled every year model but mine. All have same issue, all have same part and part number. Dealership suggested I contact NTSB to see if I could get it recalled. It is said to cause ifres in some trucks
After starting the vehicle, fire smell came into the cab. After exiting the vehicle smoke was coming from the engine. The engine caught on fire and car was totaled within 10 minutes.
Imminent lifter failure. Has a very loud tick. This is a very common and almost always catastrophic failure. This is on the 6.7L Cummins engine
August of 2023 I took my truck in for a check engine light. The dealership diagnosed it and said my def tank senor is turning on the check engine light. They repaired it, when I picked up the truck they told me that "it was burnt out" and replaced the part. Now 14 months later it's having the same issue. Wondering if other ram 2500 owners are having this same issue and if it is a repetitive issue. The repair cost me over $963.00 dollars.
Heater quit working on driver side only. Still heats on passenger side. Took it into an ASE mechanic and they said they have seen multiple RAM trucks with this same problem. It isn't the heater or heater core. It is the Cooling system - gaskets failed, and coolant sprays across intake.
The engine cam and lifters are bad. Engine started knocking with only 30,000 miles. Had to have lifters and cam replaced
The engine has had camshaft and lifter failure multiple times. The dealership has replaced the camshaft and lifters twice already , and now they have failed a 3rd time which has lead to metal in oil lubrication system. This has caused further damage to the engine crankshaft bearings, in my case the engine was still running with a tapping/knocking noise. However, this can result in engine locking up and causing vehicle to no longer operate. In the event of engine failure this heavy duty truck will have no power steering or power brakes, leading to a high likely hood of collision. This issue is widespread for all 2019+ RAM 2500 with the 6.7L Cummins engine. Ram has done nothing to address the faulty parts , and continue to replace with same flawed parts, and not correctly addressing the damage done to the engine after a lifter failure. Ram HD 2500,3500,4500,5500 are still being sold currently with these faulty parts.
TRANSMISSON MAKES A WHINING NOISE WHEN SHIFTING GEARS WHEN EXCELERATING. I HAVE TAKEN IT TO THE LOCAL RAM DEALERSHIP 4X NOW. FCA DID APPROVE A SMALL TRANSMISSION PART REPAIR, BUT UNFORTUNALTY IT DID NOT FIX THE PROBLEM.
The contact owns a 2021 Ram 2500. The contact stated that while driving at various speeds, on several occasions, the vehicle lost motive power. The vehicle was taken to a dealer where it was diagnosed that the ECM needed to be updated. The ECM was updated but the failure persisted. The manufacturer was notified of the failure. The failure mileage was 37,510.
3 months ago at around 23,000 miles, my truck had a P0302 Cylinder 2 misfire code, dealership “reset” the vehicle and code didn’t return. 3 weeks ago, cylinder 2 started having a loud tapping noise after the vehicle was fully warmed up. Vehicle has been at the dealership for 1 week with zero communication from the dealership or from the RAM caseworker. No rental car has been offered.
I recently bought this truck used from a Ford dealership. The next day when I was taking my wife for a short drive. I noticed the engine light was on the dash display. I the same time the truck started accelerating Like it was on cruise control and returning to a higher speed. The cruse control was not set when I tried to access the cruse control I would get the message that it was unavailable at this time. I had to stop the truck and turn the truck off. When I restarted the engine light was still on, but the acceleration stopped. I drove to the dealership to see if they had any information or recalls but by the time, I got there the engine light was off and their computer did not tell them anything. This has now happened two times. The dealership says I must bring the Truck in while this is happening. for them to get a reading. This is not my primary vehicle, and I don't drive it all the time and it is 45 minutes from any dealership. The uncontrolled acieration is a safety issue. The problem has not been reproduced Dealer thay had no idea what was happening. The warning lamp engine and the cruse control not available message., I am wondering if anyone else has had the problem?
The contact owns a 2021 Ram 2500. The contact stated that after the vehicle was repaired under NHTSA Campaign Number: 22V835000 (Power Train) he became aware that the replacement dipstick was 15-inches long instead the previous 44-inches in length. Additionally, the dipstick stated that it was not intended to check the transmission fluid level. The manufacturer was notified of the issue and advised the contact to take the vehicle to dealer to have the fluid level checked. The contact was not provided information for the change in the dipstick. The failure mileage was approximately 42,000.
When placing the truck in first gear to control speeds on steep declines both on and off road the vehicle's RPMS will climb significantly and the truck will accelerate abruptly under it's own power until it reaches 21-25mph. At which point the RPM's come down and truck begins to slow as expected. Once truck reaches a speed of 11mph the RPM's begin to climb again and the truck accelerates(Not due to gravity, but accelerates under it's own power) aggressively. It will continue to do this pattern until you either reach flat ground or switch gears. Safety is at risk due to uncontrolled descent down steep mountain passes. Constantly having to apply breaks to prevent the truck from going off the road. This safety liability is exacerbated when towing a trailer. I have reported the issue to the dealer multiple times with their claim that the vehicle is behaving as expected. I have not experienced this with any other vehicle. This is not common vehicle behavior. No warning Lamps, Messages or Other symptoms. Reproducible on any hill with steep enough descent.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026