YearToAvoid

2012 Dodge Ram 2500 Engine Problems

NHTSA lists 56 engine complaints for the 2012 Dodge Ram 2500, or 20% of the 283 total complaints filed for that year. Six complaints report fires, and a related recall (14V635000) covers a fuel heater electrical connector issue in the engine bay. Median mileage at failure is 47,500.

Engine complaints
56
20% of 283
Crashes reported
0
Fires reported
6
Injuries reported
0
Median mileage
47,500 mi
Related recalls
1

Typical engine symptoms owners report

  • Owners report engine power loss while towing heavy loads uphill, followed by loud noise, smoke, and fire under the hood.
  • Several owners describe fires starting in the undercarriage or engine bay while the truck was parked and turned off, some linked to the diesel fuel heater recall.
  • Some owners report diesel exhaust fumes entering the cabin through the air vents at low speeds, with no fix offered by the dealer.
  • Owners describe persistent engine ticking traced to a faulty water pump that recurred even after dealer replacement.
  • One owner reported the engine computer malfunctioning in cold weather, causing gauges to stop working with no diagnosed cause.

When 2012 Dodge Ram 2500 engine complaints were filed

First complaint Dec 31, 2012, latest May 27, 2026.

2012 Dodge Ram 2500 engine complaints: complaints filed per month7Dec 2012Jan 2015Jun 2015Nov 2015Nov 2017Aug 2018Mar 2021Jul 2023
56 complaints filed with NHTSA from Dec 2012 to May 2026; peak Mar 2015 (7).

Engine recalls for the 2012 Dodge Ram 2500

  1. NHTSA 14V635000Oct 8, 2014Engine315,325 vehicles

    Engine and engine cooling:engine:diesel

    Chrysler Group LLC (Chrysler) is recalling certain model year 2010-2014 Ram 2500, 3500, 4500, and 5500 trucks manufactured March 27, 2009, to September 5, 2013. In the affected vehicles, the electrical connectors of the diesel fuel heater may overheat.

    Risk: If the connectors overheat, the fuel heater may leak fuel, increasing the risk of a fire.

    Remedy: Chrysler will notify owners, and dealers will replace the harness side connector with a silver plated beryllium copper terminal service kit, and inspect the fuel heater for leaks, replacing it as necessary, free of charge. Chrysler issued interim notification to owners on December 8, 2014. The recall began on April 27, 2015. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is P65.

Engine complaints by Ram 2500 model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

  1. 200524 (6%)
  2. 200625 (4%)
  3. 200740 (11%)
  4. 200847 (15%)
  5. 200914 (7%)
  6. 201027 (11%)
  7. 201142 (14%)
  8. 201256 (20%)

Frequently asked questions

How many engine complaints does the 2012 Dodge Ram 2500 have?
NHTSA lists 56 engine complaints for the 2012 Ram 2500, which is 20% of the 283 total complaints filed for that model year.
Is there a recall related to engine fires on the 2012 Ram 2500?
Yes. Recall 14V635000, reported in October 2014, covers an electrical connector issue tied to the engine that Chrysler addressed by replacing the harness side connector.
Did owners report engine fires on the 2012 Ram 2500?
Yes, NHTSA data shows 6 fire incidents among the engine-related complaints for this year, with no reported crashes or injuries.
At what mileage do engine problems typically show up on the 2012 Ram 2500?
The median mileage at failure for engine complaints on the 2012 Ram 2500 is 47,500 miles.
How does the 2012 Ram 2500 compare to 2010 and 2011 for engine complaints?
Engine complaint share rose across these years: 11% in 2010, 14% in 2011, and 20% in 2012, the highest of the three.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.