I purchased a brand new 2026 Jeep Grand Cherokee L Summit in April 2026. At approximately 1,205 miles, while traveling with my wife and [XXX]  child in [XXX] , the vehicle suddenly developed a flashing check engine light and severe engine misfire condition. The engine began shaking violently, idling rough, and lost smooth drivability during operation.  I scanned the vehicle using an OBD-II scanner and the PCM stored diagnostic trouble code P0302, indicating a cylinder #2 misfire.  Due to concern for vehicle safety and possible engine damage, the vehicle was towed to Vaden Chrysler Dodge Jeep RAM for diagnosis.  The dealership later advised me that the spark plug in cylinder #2 had cracked porcelain and that the vehicle requires spark plug replacement. The dealership also stated they were awaiting authorization/approval from Stellantis before proceeding with repairs.  This failure occurred extremely early in the vehicleâs life and caused my family to become stranded during travel. A flashing check engine light indicates an active misfire severe enough to potentially damage emissions components and raises concerns about engine reliability and safety. I am concerned there may be a manufacturing defect, ignition system defect, spark plug defect, improper assembly issue, or another underlying engine-related problem.  I am submitting this complaint so the issue is documented in case other owners experience similar early engine failures or ignition-related problems on this vehicle platform. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

JEEP GRAND CHEROKEE L 2026 POWER TRAIN

I was stuck on the Hot way for 45 minutes cause my car was heating up. Itâs been in shop four times for heating up on the fourth time I took it in. I was stocked because my electrical started going out. The speedometer started just going around my electrical on my dash started going from heat to cold my seat controls then it started of the dash panel are going to ABS and going to different things showing the speedometer showing the mileage on the car it just started doing its own controls so and then my speedometer just called going fast and went back to deal so and didnât blacked out so I videotaped everything

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