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2021 Ram 3500 problems: engine and transmission complaints and recalls

HIGH COMPLAINT SIGNAL
43%
25 of 58 relevant owner complaints are about the engine, transmission or fuel system

43% of relevant owner complaints filed with NHTSA on the 2021 Ram 3500 are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.

Worse than 52% of the 1,790 model years we track (2010–2023).

Excludes 4 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 40%).

NHTSA data checked October 3, 2026

The VIN is on the listing, the driver’s door jamb, and the bottom of the windshield on the driver’s side.

Does the 2021 Ram 3500 have transmission problems?

Owner complaints say yes, as a model-year pattern. 25 of 58 relevant complaints filed with NHTSA about the 2021 Ram 3500 concern the engine, transmission or fuel system (43%), and the largest group is filed under power train (11). For comparison, the 2020 scores 51% and the 2022 scores 74%. On a test drive, check for shuddering, slipping, delayed or harsh shifts, or a whine at speed. 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.

Drivetrain complaints
25
engine, transmission, fuel
Total complaints
62
this model year
Fires reported
4
owner-reported
Recall campaigns
9
0 crashes · 0 injuries

Complaints by component

ELECTRICAL SYSTEM17 · 27%
POWER TRAIN11 · 18%
ENGINE10 · 16%
UNKNOWN OR OTHER9 · 15%
WHEELS7 · 11%
SERVICE BRAKES6 · 10%

The years either side

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

How the 2021 compares with other Ram 3500 years

Of the 10 Ram 3500 years with enough complaints to score, the 2021 is the 3rd-worst on engine and transmission share (43%). The worst is the 2022 (74%), the best the 2018 (5%). By volume, the 2021 drew 62 complaints (25 drivetrain), against 116 for the 2020 and 190 for the 2022.

Ram 3500 years to avoid and best years →

In the full report

The rest of the picture on the 2021 Ram 3500

  • What the repair costs. Typical transmission repair ranges, to price into your offer.
  • Cleaner alternatives. Similar cars and nearby years with a better record.
  • Up to 15 owner reports, with the ones about your car's own engine first.
  • What to ask the seller and what to check on the test drive, for this car.
  • Two cars side by side, if you are deciding between them.

What one owner reported

ENGINE AND ENGINE COOLING,BACK OVER PREVENTION06/01/2026
The contact owns a 2021 Ram 3500 . The contact received notification of NHTSA Campaign Numbers: 25V720000 (Engine and Engine Cooling) and 25V552000 (Back Over Prevention) however, the part to do the recall repair was not yet available. The dealer was contacted. The vehicle was not diagnosed or repaired. The dealer conf…

One of 25 drivetrain complaints. The full report shows up to 15, with quotes about the engine in the car you are looking at first.

2021 Ram 3500 transmission recalls

Yes. NHTSA lists 1 recall campaign on the 2021 Ram 3500 involving the engine, transmission or fuel system, out of 9 in total. A recall is the manufacturer admitting a defect and paying to fix it; whether a specific car still has one open depends on its VIN, which the full report checks. The owner complaints above are a separate record and often point at problems that never became a recall.

power train: automatic transmission22V835000 · Nov 2022

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.

Risk: Leaking transmission fluid may contact an ignition source within the engine compartment, increasing the risk of a fire.

Fix: 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…

8 other recalls on this model year (airbags, lighting, brakes and the rest)
air bags: frontal25V765000 · Nov 2025
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…
electrical system: wiring: relays/solenoids23V060000 · Feb 2023
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…
structure: body: tailgate: hinge and attachments22V904000 · Dec 2022
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…
service brakes, hydraulic: antilock/traction control/electronic limited slip: control unit/module22V140000 · Mar 2022
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…
air bags: side/window: curtain21V925000 · Nov 2021
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…
electrical system: wiring: relays/solenoids21V798000 · Oct 2021
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…
wheels: lugs/nuts/bolts/studs21V398000 · May 2021
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…
electrical system21V163000 · Mar 2021
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…

Source: NHTSA recall campaigns filed against this year, make and model. Checked October 3, 2026.

Checking one particular 2021 Ram 3500? This page is about the model year. Accidents, title brands and odometer records belong to the individual car, and that is what a vehicle history report covers.

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Questions people ask about the 2021 Ram 3500

Does the 2021 Ram 3500 have transmission problems?

Owner complaints say yes, as a model-year pattern. 25 of 58 relevant complaints filed with NHTSA about the 2021 Ram 3500 concern the engine, transmission or fuel system (43%). Before buying one, have an independent mechanic check the transmission and ask the seller whether it has been repaired or replaced.

What is the most common problem with the 2021 Ram 3500?

Going by NHTSA owner complaints, the most common problem filed against the 2021 Ram 3500 is electrical system: 17 of 62 complaints (27%) name it, followed by power train (11) and engine (10). A complaint can name more than one component, so these overlap. Engine, transmission and fuel-system complaints together make up 43% of the relevant total.

Is the 2021 Ram 3500 reliable?

On the engine and transmission, owner complaints point to a weak spot: 43% of relevant complaints filed with NHTSA concern the drivetrain (high signal). That is worse than 52% of the 1,790 model years we track. Among the 10 Ram 3500 years we score, it ranks 3rd-worst. Complaint data describes the model year, not one car, and it says nothing about trim, paint or electronics outside the drivetrain; an independent inspection still decides it.

Are there engine or transmission recalls on the 2021 Ram 3500?

Yes. NHTSA lists 1 recall campaign on the 2021 Ram 3500 involving the engine, transmission or fuel system, out of 9 in total: 22V835000 (power train: automatic transmission). Whether a specific car still has one open depends on its VIN.

Which Ram 3500 years are better?

Among the Ram 3500 years we track, the 2018 (5%), the 2017 (17%) and the 2016 (33%) have a lower engine and transmission complaint share than the 2021 (43%). Manufacturers fix things mid-generation, so the year before or after can be a different car. Every year side by side: https://thelanecheck.com/cars/ram-3500

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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.