On October 23, 2026, my 2023 Jeep Grand Cherokee 4xe unexpectedly lost propulsion. Before this incident, it intermittently shifted very harshly at 40-60 mph while I maintained steady accelerator pressure. That day, a "SERV 4WD" warning appeared and the vehicle tugged and jerked during turns. As I pulled into a parking space, it lost the ability to move. I turned it off. After waiting, I restarted it; there was a very loud thunk, and it suddenly lurched forward. The check-engine and brake warning lights...
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illuminated, and it still would not move. When the tow truck driver restarted it, the loud thunk happened again. He was eventually able to reverse and move the Jeep a few feet onto the tow truck. He said it appeared to be staying in electric mode rather than transitioning to hybrid operation, although this was not a confirmed diagnosis. The Jeep was towed to an authorized dealership. The dealership says diagnostic scans pass and it cannot reproduce the failure. No cause or repair has been identified. My Jeep app shows safety recall 78C (NHTSA 25V-766), related to possible engine failure and loss of propulsion, with the status "Parts Unavailable." The dealership told me its scan indicates my vehicle does not need the recall, but has not clearly explained why. I do not know whether the recall caused this incident. I have opened a case with Jeep Corporate. I am concerned this unexplained loss of propulsion and sudden forward lurch could recur in traffic and cause a crash. I request that NHTSA document and review this potential safety defect.