2021 Ram 2500 problems: engine and transmission complaints and recalls
HIGH COMPLAINT SIGNAL
53%
53 of 100 relevant owner complaints are about the engine, transmission or fuel system
53% of relevant owner complaints filed with NHTSA on the 2021 Ram 2500 are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 70% of the 1,789 model years we track (2010–2023).
Excludes 8 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 49%).
Owner complaints say yes, as a model-year pattern. 53 of 100 relevant complaints filed with NHTSA about the 2021 Ram 2500 concern the engine, transmission or fuel system (53%), and the largest group is filed under engine (26). For comparison, the 2020 scores 44% and the 2022 scores 51%. On a test drive, check for stalling, loss of power, rough idle, oil consumption or a check-engine light. This describes the model year, not any one car: a well-maintained or already-repaired example can be fine, and a clean model year can still have a bad car in it.
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
What owners reported
POWER TRAIN,UNKNOWN OR OTHER,ENGINE09/10/2026
I am writing to formally follow up regarding complaint/case number 97989810 through Dodge and to request that this matter be elevated for a complete technical review concerning my 2021 Ram 2500 6.7L Cummins, VIN [XXX]. Time - Line PRIOR FACTORY-WARRANTY REPAIR The XXX factory-warranty repair is an important part of t…
POWER TRAIN09/07/2026
There is a known issue with the Ram Power Wagon locking differential system where the electronic locking differential wiring harness will fault one of three ways. The first being that the wiring harness is two short so when the rear axle articulates there isn't enough slack therefore causing the plug in the diff housin…
POWER TRAIN04/28/2026
The 68RFE automatic transmission in this 2021 Ram 2500 6.7L Cummins fails to engage reverse when the transmission reaches operating temperature. When the gear selector is placed in reverse and the accelerator is applied, the engine revs but the truck does not move. The defect is intermittent and temperature-dependent, …
Three of 53 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Recall campaigns on the 2021 Ram 2500 (8)
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 Die…
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…
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 elect…
This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.
Before you buy a 2021 Ram 2500
Ask the seller whether the engine has ever been repaired or replaced, and whether the car has shown stalling, loss of power, rough idle, oil consumption or a check-engine light.
Drive it from a cold start and long enough to warm up. Many engine faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the engine.
8 recall campaigns on this model year. Whether a specific car still has one open depends on the VIN; the report checks that.
Ask for service records. A engine already replaced under warranty is a different car from one that was not.
Questions people ask about the 2021 Ram 2500
Does the 2021 Ram 2500 have engine problems?
Owner complaints say yes, as a model-year pattern. 53 of 100 relevant complaints filed with NHTSA about the 2021 Ram 2500 concern the engine, transmission or fuel system (53%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
Are there engine or transmission recalls on the 2021 Ram 2500?
NHTSA lists 8 recall campaigns on the 2021 Ram 2500. Whether a specific car still has one open depends on its VIN.
Which Ram 2500 years are better?
Among the Ram 2500 years we track, the 2018 (4%), the 2017 (12%) and the 2011 (20%) have a lower engine and transmission complaint share than the 2021 (53%). Manufacturers fix things mid-generation, so the year before or after can be a different car.
Should I buy a 2021 Ram 2500?
That depends on the car in front of you, not just the model year. The 2021 Ram 2500 has an elevated engine complaint pattern, so treat it as a car that needs proof: service records showing engine work, a cold-start test drive, and an independent pre-purchase inspection focused on the engine. A well-kept or already-repaired example can be a fine car; an unknown one is a gamble.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental model-level information. This is not a vehicle inspection, vehicle-history
report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition
of any individual vehicle.