Some 2014-2019 Jeep Grand Cherokee equipped with the 3.0L EcoDiesel engines may have been built with Exhaust Gas Recirculation (EGR) coolers that are susceptible to thermal fatigue. The suspect vehicles were built between December 19, 2012 to January 17, 2019.
According to the defect report, thermal fatigue may cause the EGR cooler to crack internally and introduce pre-heated, vaporized coolant to the EGR system while the engine is running. Under some circumstances, this mixture can interact with other hydrocarbons and air in the system causing it to combust within the intake manifold. The problem could result in a vehicle fire.
NOTE: Warning signs that the problem exist include, drivers may notice an unidentifiable loss of engine coolant, lack of heater function and possibly an illuminated malfunction indicator lamp.
Dealers will replace the EGR cooler and, inspect and replace the intake manifold as necessary. Chrysler's (FCA) number for this recall is W79 and the NHTSA campaign number is 20V-699.