2024 Jeep Grand Wagoneer: sudden loss of power

Filed Oct 14, 2026 · Electrical, Engine · CA

On four separate occasions on 10/13/26, the 2024 Jeep Grand Wagoneeer experienced sudden and complete vehicle systems shutdowns while being driven. Vehicle owner and two daughters were in the car. It was early morning (5:15am), and very dark. These incidents were not ordinary engine stalls. Suddenly and without warning the vehicle's engine shut down, all electrical power ceased, the dashboard, headlights, running lights and instrument displays went dark, and power-steering assistance was lost each time. Three of these four incidents occurred while the vehicle was traveling at approximately 15 mph, 30 mph, and 40 - 50 mph on surface streets. The worst and most dangerous incident occurred while owner was merging onto the freeway at approximately 55 mph. Because of the previous shutdowns, she had deliberately reduced speed and was traveling in the slow lane out of concern that the vehicle might fail again. Despite these precautions, the vehicle suddenly and completely shut down once more. In each of the four incidents, the owner was eventually able to restart the engine, but only after several attempts. The sudden and simultaneous loss of engine power, electrical systems, lights, instrumentation, and power-steering assistance while the vehicle was moving in the dark in traffic created an immediate and substantial risk of a serious or fatal collision. Following the fourth incident, the vehicle was towed to a Chrysler/Jeep dealer for investigation.

Filed Apr 23, 2026 · Engine · WV

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.

Filed Apr 4, 2026 · Electrical, Lights · NY

2024 Jeep Grand Wagoneer L Obsidian. Water intrudes into the left headlight assembly through a defective seal, destroying the LED driver module (OEM part #68590086AD) and burning the internal wiring harness connector. This has caused: (1) complete headlight failure while driving in winter conditions with passengers; (2) sudden loss of engine power while in operation; (3) battery failure with standing water found under the battery on the left side; (4) Uconnect/radio/antenna/telematics failure (case open since 30,000 miles, unresolved). All failures traced to the same left-side water ingress point. Jeep Case [XXXX] and Wagoneer Connect Case #[XXXX] both open and unresolved for 18+ months. Vehicle used for licensed medical patient transportation. Multiple roadside assistance calls. Total losses approximately $10,000. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 6, 2026 · Acceleration, Fuel system · TN

While driving, my vehicle has intermittently lost power without warning, creating a serious safety hazard. The loss of power occurs unexpectedly while the vehicle is in motion and is not associated with any driver input, weather, or road conditions.The issue has occurred on more than one occasion. The first occasion in March 2025. The issue appeared to be temporarily resolved but later recurred, indicating the underlying problem was not corrected. When the loss of power occurs, the vehicle does not respond to acceleration input and behaves as though propulsion is cut off completely. This happens suddenly and without warning while driving.This condition creates a dangerous situation, particularly when driving in traffic or at speed as was the case on 12/4/25 when driving 70 mph on the freeway, the second time the issue occurred for us. The car was immediately brought to the dealership on 12/4/2025 and remains there today. On the first occurrence the dealership attributed it to low battery charge and replaced both batteries. The dealership has performed inspections and diagnostics including:Battery testing and replacement,Wiring and harness inspections,Software updates to vehicle control modules,Extended road testing.Despite these efforts:The issue has not been permanently resolved,The dealership has stated the concern could not be duplicated,The dealership has indicated that fault codes were not always present. A STAR case has been opened, Jeep Customer Care has been contacted regarding this issue, and a field technician has been requested to come to the dealership to assess the vehicle. Despite repeated service visits I am submitting this complaint to report a recurring, intermittent loss-of-power condition that may not consistently trigger diagnostic fault codes but poses a serious safety risk for the car occupants and other drivers on the road surrounding this vehicle.

Filed Jan 7, 2026 · Electrical, Engine · MO

While driving my 2024 Jeep Wagoneer, the vehicle experienced a sudden and complete loss of power without warning. The engine shut off while the vehicle was in motion, including during a turn. When this occurred, I lost power steering, which made the vehicle difficult to control and created an immediate safety hazard. Prior to this incident, the vehicle had ongoing issues including overheating, repeated check engine lights, and power steering warnings. The vehicle has been taken to the dealership multiple times. A thermostat repair was previously performed, and at a later visit I was told there was an electrical/battery wiring issue that was repaired. Despite these repairs, the problem has continued. The loss of power while driving placed my safety and the safety of others at risk, especially since the failure occurred without warning and resulted in loss of steering assistance. I no longer feel the vehicle is safe to operate, particularly when transporting my children. The issue has been inspected by the dealership on multiple occasions; however, the root cause has not been permanently identified or resolved. Warning lights, including the check engine light, have appeared intermittently prior to the failure. The defect appears to be recurring and