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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 1,789 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
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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

2010
no data
2011
no data
2012
no data
2013
40%
44 of 114
2014
39%
74 of 202
2015
41%
52 of 136
2016
33%
41 of 134
2017
17%
52 of 312
2018
5%
40 of 806
2019
42%
56 of 136
2020
51%
58 of 116
2021
43%
25 of 62
2022
74%
136 of 190
2023
too few complaints

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

Cleaner alternatives

Same car, a better year

Other heavy-duty pickups with no elevated signal

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

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…
ENGINE AND ENGINE COOLING,BACK OVER PREVENTION03/25/2026
The contact owns a 2021 Ram 3500. The contact received notification of NHTSA Campaign Number: 25V552000 (Back Over Prevention) and 25V720000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded…
ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE11/19/2025
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 f…

Three of 25 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 3500 (9)

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…
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 a…

This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.

Before you buy a 2021 Ram 3500

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.

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

NHTSA lists 9 recall campaigns on the 2021 Ram 3500. 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.

Should I buy a 2021 Ram 3500?

That depends on the car in front of you, not just the model year. The 2021 Ram 3500 has an elevated transmission complaint pattern, so treat it as a car that needs proof: service records showing transmission work, a cold-start test drive, and an independent pre-purchase inspection focused on the transmission. A well-kept or already-repaired example can be a fine car; an unknown one is a gamble.

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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.