On June 18, 2026, I was driving my 2024 Grand Wagoneer on a busy city road. As I approached a busy intersection, I stopped at the red light. When I attempted to move forward when the light turned green, it moved a few feet (putting us in the middle of the intersection), the vehicle seized and became immobile. Almost every light on the dashboard lit up. Several messages flashed back and forth on the screen including "Service transmission" and then "service electronic stability control". I immediately tried to use the SOS function, and when they answered, they were unable to hear me. A person in a truck behind me told me to put my vehicle in Neutral so that the vehicle could move out of the road as it was blocking traffic. When I tried to turn the gear dial, it turned, but the P light stayed on and the vehicle would not go into Neutral. I checked the parking brake and it was not on, nor would it engage. The vehicle being stalled, with zero ability to move put my children and I in danger as there was not a safe place to even exit the vehicle as traffic was completely surrounding us. I tried to turn off the vehicle, but the vehicle stayed in the "run" function even after being pressed. Emergency services was my only next choice. One more push of the off button and the vehicle finally turned off. I waited for 2 minutes and tried to turn the vehicle on again. It did turn on, showing the check engine light. I then was able to put the car into gear, and it moved. I moved the vehicle out of traffic to the next available parking lot. I immediately contacted the dealership and told them I would be having the vehicle towed there for inspection and I do not feel comfortable driving this vehicle again. Unfortunately, this is the 3rd time my car has put me in a dangerous situation in the middle of an intersection, the other 2 being false crash alerts (turning left in turning lane and car thought I was going into oncoming traffic).

This issue has happened three times. I am on the highway going 70mph, the RPMs fluctuate, the headlights go out and then I lose propulsion/unable to maintain or increase speed. This is a safety concern as it has happened 3 times on the highway with no warning and limited time to pull over to safety. The dealership is unable to replicate the problem or diagnose an issue.

Car engine completely shuts down at highway speeds sudden loss of throttle/power at highway speed * RPM surging or erratic behavior * dashboard/light flickering * vehicle entering limp mode or shutting down * no-start condition afterward * then the vehicle “magically” works again later * dealership unable to reproduce it * sometimes no stored codes

Rear sunroof glass imploded spontaneously and shattered while driving

The thermostat failed causing the vehicle to go into a reduced power mode while climbing a hill with a trailer. The dealer has a technical service bulletin for this issue but the overheating can call engine damage or an accident when the vehicle has reduced power. There were no warnings on the cluster until the car was already in a protection mode and power had been reduced. The cluster coolant temperature gauge is slow to respond and not accurate.