2015 Ram 2500 Cummins — Should You Buy One?
Typical asking price: $30,000–$45,000. There is 1 high-severity known issue you need to know before handing over a check.
Kestrel Take
The heavy-hauler's favorite — the 6.7L Cummins inline-six is a torque monster with a reputation for going 300k-plus when maintained, and the coil-spring rear rides better than leaf-spring rivals. The watch-items are all emissions-system and abuse related: EGR, DPF, and DEF upkeep, plus whether it was worked to death or (worse) deleted/tuned. A documented, un-deleted Cummins is a superb heavy-duty truck.
What we checked
Reconciled against public records, 2026-09-11
NHTSA holds 214 owner complaints for the 2015 Ram 2500 Cummins, across 15 recall campaigns.
A big number here usually means a lot of these were sold, not that it is a bad vehicle — popular models collect more complaints for the same rate of trouble. So the total on its own says little. What is worth reading is the shape of it. The largest single group is the transmission and drivetrain at 21%. That is notable without being overwhelming — worth checking, not worth panicking about.
15 recall campaigns cover this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.
Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.
Known Issues for the 2015 Ram 2500 Cummins
Ranked by wallet impact. These are documented, recurring problems — not freak accidents.
The 6.7L Cummins emissions hardware is costly if neglected; EGR coolers, DPF, and DEF systems are the trouble spots. Verify thorough history and no active faults.
Repair cost (estimate): $1,000-$5,000 if affected
Source: NHTSA complaints filed under the engine (36).
Many were emissions-deleted/tuned — illegal, can fail inspection, void warranty, and hide problems. A deleted truck is a legal and resale liability.
Repair cost: Not a repair — an ownership-cost warning, not a mechanical fault
Source: NHTSA complaints filed under the engine (36).
These work hard; check for driveline wear, frame/hitch abuse, and honest history.
Repair cost: Not yet priced
Source: not yet checked against public records.
Heavy front axle wears steering and ball joints; inspect for play and death-wobble risk.
Repair cost (estimate): $400-$1,500
Source: NHTSA complaints filed under the transmission and drivetrain (44), steering (43).
Walk-Away Red Flags
- ✗Deleted/tuned emissions
- ✗Emissions faults / thin history
- ✗Hard work/tow abuse
- ✗Front-end play or wobble
Good Signs
- ✓Stock emissions, thorough service records
- ✓Honest tow history, tight front end
Found a specific Ram 2500 Cummins?
This page covers what goes wrong on the 2015 Ram 2500 Cummins in general. The Kestrel report covers this specific car— the asking price vs. market, the photos, the seller's description, and a BUY / NEGOTIATE / WALK AWAY verdict with a negotiation script.
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Not ready to pay for one? The free read is instant and needs no card — it checks the asking price against the market and names the top issues for this year. It stops short of the verdict, because that needs the photos.
Known issues on this page are based on documented owner reports, NHTSA complaints, class-action records, and manufacturer technical service bulletins. Individual vehicles vary. A pre-purchase inspection by a trusted mechanic is always worth doing.
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