Jeep Grand Wagoneer overheating problems

Filed Sep 16, 2026 · Electrical · CO

I had to call the fire department because my the auxiliary battery in my Jeep had overheated creating a sulfur-like smell in my garage and eventually into my home. The fire dept recorded the aux battery temp over 200 degrees and the main battery was almost 150 degrees after sitting idle in the garage for over 5 hours and had only drove twice that day for no more than 20 minutes each time. I purchased the vehicle in May of 2023, I believe in Oct of 2023 the dealership had to replace the aux battery, now Aug of 2026 the aux battery failed again overheating and causing the main battery to swell and fail. The dealership was horrible about diagnosing the issue with no real answer and telling me that there is a software update in the works however; I have a friend in the business (works for Stellantis) who tells me that the automaker IS AWARE of these failing aux batteries due to them not shutting off. This known issue puts families at risk of fire and explosion. I do not feel anyone is taking this seriously. The dealership forced me to buy two new batteries, gave no reason why, and basically sent me on my way. I would like to know that someone is going to call on the automaker for a fix so that both my family and others, will not have to worry about having a dangerous vehicle parked in their garage.

Filed May 8, 2026 · Electrical, Engine · OH

Vehicle was driven for 5 minutes before alerting that it was overheating. While attempting to pull into a safe location off of a main road, the vehicle would not allow me to accelerate. This left our family stranded in the turn lane. I was unable to restart the engine or shift into drive.

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 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

Filed Dec 15, 2025 · Electrical, Engine · TX

An overheating engine causes the truck to shut down completely, block the power steering engine, and become undrivable. Electrical and harness assembly problems The dealership inspected the truck and attempted to repair it, but the same issues have recurred and are nearly causing an accident while driving on a highway.

Filed Nov 10, 2025 · Engine · VA

I am filing this complaint regarding a serious and ongoing turbocharger and engine problem in my 2022 Jeep Grand Wagoneer. Despite being one of Jeep’s flagship luxury vehicles, my SUV has experienced repeated engine warning lights, loss of power, and now complete turbo failure—all within 57,300 miles and under warranty. Soon after purchase (used, low mileage), the check engine light began appearing repeatedly. The dealership (Jeep Pearson, Broad Street, Richmond, VA) performed several repairs and software resets, but the problem always returned. Recently, I was informed that the turbocharger must be replaced—an alarming issue for such a premium vehicle. These failures have created safety risks including: Sudden loss of acceleration while driving on highways or merging. Hesitation or delayed throttle response, leading to unpredictable behavior in traffic. Concern about engine stalling or overheating from repeated malfunction. I have already escalated the issue to Jeep Brand (Stellantis) and requested the following: Vehicle replacement with a safe, defect-free model; Buyback and loan payoff to remove liability from a defective vehicle; or Two-year warranty extension covering all turbo and powertrain components. Despite multiple service visits and my written escalation, Jeep has not provided a permanent fix or assurance that the problem won’t return after repair. My warranty is nearing expiration, leaving me at risk of future costs caused by what appears to be a manufacturing defect. Through online research and owner discussions, I’ve found other Grand Wagoneer owners reporting similar turbo failures, power loss, and recurring check-engine issues, often before 60,000 miles. This suggests a potential systemic defect that could compromise safety across the 2022 Grand Wagoneer line. I respectfully ask the federal safety agency to Investigate turbo and powertrain reliability in 2022 Jeep Grand Wagoneers. Make/Model: 2022 Jeep Grand Wagoneer VIN: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.

Filed Oct 24, 2025 · Engine · OK

Our car overheated because of a faulty thermostat leaving us on the side of the road stranded with kids in the car. We had to have the car towed.

Filed Sep 20, 2025 · Electrical, Engine · GA

Multiple battery drainage issues resulting in car not starting and battery going to zero volt. Car running hot. Failed thermostat causing engine overheat and car to shut down. System breaking issues.

Filed Aug 6, 2025 · Engine · 17,500 miles · MD

The contact owns a 2023 Jeep Grand Wagoneer. The contact stated that while his wife was driving approximately 65 MPH on the highway, the vehicle lost motive power and shut off. The vehicle was later towed to the local dealer, who diagnosed that the thermostat had failed, causing the engine to overheat. The contact was informed that the valve inside the thermostat had bound, causing improper internal operation of the thermostat. The thermostat was replaced, and the vehicle was repaired. The contact was informed that per TSB: 09-006-25, the same style thermostat was installed to repair the vehicle. The manufacturer was notified of the failure. The failure mileage was 17,500.

Filed Apr 30, 2025 · Electrical, Engine · IN

I was told the vehicle has a TSB out for stuck thermostat in the engine. It can cause malfunctions, overheating, etc. we also have an issue with the trunk door not closing or opening properly due to a module issue.