2023 Jeep Wagoneer engine problems

“Issues began on 9/29/26 - The transmission was slipping and failed to shift numerous times when accelerating causing a loss of power. This happened several times at highway speeds when passing. Warning lights came on after this issue occured. This issues happend several times over the course of about a month. These issues put my safety at risk multiple times when I was suddenly not able to accelerate to pass or in some instances not able to accelerate to enter the interstate. This issue also occured at a low speed in stop and go (interstate) traffic. The vehicle would not shift out of 1st gear and I was forced to drive on the interstate at a dangerously low speed until I could exit the interstate. Warning lights came on due to this issue. The Jeep dealership assessed the vehicle and determined that the transmission needed replaced. The transmission was replaced at a certifed Jeep Dealership. The vehicle was tested, deemed repaired, and returned to me. The next day the same issue occured where the transmission would slip, grind, and then lose power. That same day the vehicle lost power completely while driving. The engine shut off while I was driving. When I…”

“Vehicle will suddenly shut off in traffic. Will NOT start back up for 1-2 minutes. Control panel near gear selector will flash on and off message reading Hold brake and start button. Screen all black. This has happened 3 times this month. Car shut off in car wash, once started it would not shift from Park into Neutral or Drive for 60 seconds. When accelerating on expressway, vehicle will shake then message flashes on dashboard "Put in proper gas and oil". Happens weekly. Dealership of course cannot find any issues or replicate codes....very convenient. Bought new-2023 Jeep Wagoneer Series 2 Hurricane twin-turbo engine.”

“The thermostat suddenly failed, causing extensive engine failure. The engine failure was the direct and unavoidable consequence of a known manufacturer defect explicitly covered under Customer Satisfaction Notification 26B and TSB 09-006-25 / RSU 25-047 which should have replaced my thermostat or been a recall.”

“I recently had an oil change at the dealership I purchased the Wagoneer from. Three days after the oil change was completed, I was sitting at a stop light when the vehicle completely shut down, and the power steering went out. I started the vehicle back up and a power steering service notice popped up. That same day, the large central display screen kept flashing on and off, when it finally shut completely off. Six days later, I was driving home from work when I noticed the engine kept running up into the 6-7000 RPM's if I tried to drive over 40mph. I drove under 40mph the rest of the way home (about 10 minutes) and started noticing how loud the engine sounded and the temperature gauge was increasing. I was about 1 minute from home when my daughter and I could feel the heat coming from the engine inside the cab of the vehicle. It was so hot, I was concerned the vehicle was going to catch on fire. I parked it away from my home and called the dealership. They sent a tow truck and inspected it the next day. They stated the engine thermostat went out, and the auxiliary battery failed. There were never any warning lamps or messages displayed while this was…”

“While driving my vehicle suddenly shuts off the engine and puts the vehicle into park. This has happened multiple times now and once on I-66 while merging onto I-495. This seems very dangerous.”

“Our vehicle was purchased in December of 2025. Aprox. One month after purchase the vehicle unexpectedly turns off while driving. Fails to start. Along with multiple other issues. Its has been in the shop over the course of that time more than four months and is in the shop current day 14sept2026. We have spend roughly $10,000 to date and continue to be financially and emotionally ravaged. Sealants has been no help. The purchasing dealership also refuses to make it right.”