2021 Jeep Wrangler engine problems

“At 47000 miles the oil cooler cracked, although the technician stated it did not cause the crankshaft: harmonic balancer pulley to be damaged, the mat issue did occur and documentation from other sources state one can cause the other. Replacement cost was substantial for a low mileage vehicle. Documented issues with the oil cooler failing on Jeep Wrangler JL, specifically the 3.6 L engine is easily obtainable. The dealership admitted replacing a lot of them. This is a manufacturer defect that should be resolved.”

“When driving about 50 miles per hour on the highway, it felt like my engine suddenly gave out and my dash turned off. When it came back in, there were multiple indicator lights and a message that read "Pull over safely and shift to Park." I did just that, but after that I couldn't get the car to turn back on or shift out of park. I had to have to towed to the dealer and it has been there since 10/13.”

“While towing a utility trailer on the highway, the vehicle suddenly lost acceleration and could not maintain normal power while the driver was attempting to pass a semi-truck. During the incident, the semi-truck contacted the trailer and shredded one of the trailer tires. Three occupants were inside the vehicle. No injuries occurred, but the incident created a serious risk of a fatal collision. The vehicle has repeatedly displayed “Service Electronic Stability Control” and other warning lights, together with loss of power and transmission hesitation/slipping. The same concern has been reported to the dealership during approximately three service visits. The dealership previously replaced the air filter and attributed the warning lights to it, but the condition returned. Dated videos show the warning condition before and after that repair. The vehicle is currently back at the dealership for the recurring safety concern.”

“I have owned this vehicle since August of 2021 and consider myself very familiar with the normal operation and performance of the vehicles propultion system. From August of 2021 through December of 2025: - I could operate the vehicle at highway speeds in full electric mode - I could reliably tell when the vehicle would transition to the internal combustion engine and how the vehicle would respond when it transitioned (a smooth transition) - I could have confidence in how the vehicle would accelerate when the gas pedal was pushed. I had the 68C recall performed on 12/23/25 and since the recall, the vehicle's propultion system has not been the same to the point where it is a safety concern. - I cannot operate the vehicle at highway speeds in full electric mode and in many cases cannot operate in electric at lower speeds. - When the vehicle transitions to internal combustion, the engine climbs to an unsafe RPM, then reduces RPM in stages until transitioning back to full electric. This process repeates iteslf over and over as if the vehicle is trying to find the right balance between electric and gas. These transitions cause unreliable fluctuations in speed and…”

“My 2021 Jeep 4XE is not safe after the 68C battery recall, this recall has caused the combustion engine to start intermittently even though I am in hybrid or electric mode, when this happens, the jeep will not respond to the accelerator pedal for a few seconds while the computer figures out what to do, when pulling away from a stop sign or turning left in traffic this lag has made it very difficult to drive in traffic. I feel the 68C recall has made this vehicle unsafe to drive unless you know it's going to lag and make driving corrections because of it. At this point I will not let anyone but myself drive it for fear they will experience the lag and end up in an accident because of it. I have had it back to the dealer 2 times and they acknowledge my complaint but since it has no codes they can't or don't know h0w to fix it. They have contacted Stellantis and they advise the jeep is operating as designed. It didn't do this prior to the 68C recall. Not sure what to do at this point but I now have a vehicle that I bought because I liked the performance of the Hybrid system but now that performance is compromised to the point, I feel it's not safe, and Jeep cant…”

“Vehicle shuts down and looses all power and battery controls without warning. My [XXX] daughter was driving the jeep when this happened. Was unable to get vehicle into N for over an hour. Fuses and relays inside the under hood fuse block were extremely hot. After finally getting it into N, we removed from the travel lanes of the 4 lane highway. I had jeep towed to house and waiting to hear back from dealer as to when I can have it towed in.”