Jeep Wagoneer overheating problems

Filed Nov 5, 2026 · Engine · AR

Thermostat failed and car overheated, resulting in a high temperature warning. Had to take immediate evasive action to pull onto the shoulder in order to prevent complete engine failure.

Filed Oct 2, 2026 · Electrical, Engine · MO

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 happening. If I would not have been paying attention to the gauges and would have been further away from home, this vehicle could have overheated completely and potentially caught on fire putting my kids, myself, and others on the highway in danger. There was a Campaign Reference: 26B issued by Stellantis in April 2025 stating this exact issue and noting the repair to be performed, however, they only included specific Wagoneer's equipped with a 3.0L GMET6 engine. My engine is a 3.0L I6 Hurricane and was not included in the campaign, even though it is the exact same issue and this could have all been avoided.

Filed Sep 12, 2026 · Electrical, Engine · MI

The engine cooling system failed while my husband and I were driving on the freeway at night: the thermostat stuck closed and cut off coolant flow to the engine, causing it to overheat and become unsafe to continue driving. This occurred at approximately 10:00 PM on XXX roughly two hours from home over a holiday weekend, with two occupants in the vehicle. The vehicle had to be towed, but it took nearly four hours to get a tow truck, leaving us stranded on the freeway at night; because we were stranded so far from home, my [XXX] father had to drive two hours to reach us at 10:00 PM and then drive us two hours home, arriving around 1:00 AM, which put an elderly driver on the road late at night and created further risk. There was first a low oil pressure code and the engine was revving without the gas being pressed. Then that code went away and the engine overheating code came on along with an occasional battery code. The vehicle was diagnosed and repaired by Bud's Chrysler Dodge Jeep Ram between XXX and XXX the dealership confirmed the stuck thermostat and coolant cut-off and replaced the thermostat. The vehicle is available for inspection on request. No manufacturer, police, or insurance inspection has taken place to date. Mileage at time of failure: approximately 78,000. VIN: [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 22, 2026 · Engine, Transmission · WV

2024 Wagoneer was shifting weird, throwing itself in parking mode. Shutting off and making you stop while driving to shift in desired gear. Throwing itself in park going down the highway and about had us in a head on collision. Motor has loss of lower and overheating. Multiple misfires on multiple cylinders on all 3 occasions when returned to the dealership. Unable to fix on multiple attempts. Car is still in dealership garage awaiting to be repaired.

Filed Jun 23, 2026 · Engine · FL

Vehicle: 2023 Jeep Wagoneer Mileage at time of incident: 43,400 miles Component: Engine Cooling System / Thermostat Incident Description: This vehicle has experienced two separate thermostat failures since purchase. The first failure occurred the day after I purchased the vehicle, in April 2024, at only 104 miles. This time the vehicle overheated /stall pattern even after confirming coolant was at a sufficient level. The second failure occurred on Monday, June 22, 2026, at 43,400 miles. While driving with my wife, son, and son's friend as passengers, the temperature warning indicator activated, signaling an engine overheating condition. Shortly after, the engine lost power and stalled completely while the vehicle was in the middle of a busy intersection. With the engine off, I had no power assist for steering or braking, which made it extremely difficult to maneuver the vehicle out of the path of oncoming traffic. My family and I were nearly struck by other vehicles while attempting to get the disabled Wagoneer clear of the intersection. The recurrence of this failure at relatively low mileage (43,400 miles on a 2023 model) indicates a potential design or manufacturing defect in the cooling system, not an isolated incident. The second failure resulted in a complete loss of engine power in active traffic, creating an immediate safety hazard to my passengers and to other drivers on the road. Repair history: Failure #1: April 2024, 104 miles Failure #2: June 22, 2026, 43,400 miles Cost of most recent repair: Approximately $2,000

Filed Jun 23, 2026 · Engine · NH

Vehicle overheated and came to a sudden stop on a busy intersection, with my five young children in the car. Faulty thermostat.

Filed Jun 19, 2026 · Transmission · IL

The internal drive pin on the factory thermostat's ball valve is binding or failing causing my engine to overheat.

Filed Apr 20, 2026 · Engine · AZ

This vehicle has had 2 incidents where the engine overheated. In both instances, the thermostat has been replaced under warranty. Due to this most recent overheating event, the repairs were over $1750 excluding the portion of repairs under warranty. There were no warnings before the engine overheated, and the vehicle was being driven on the freeway at appropriate speeds. This is not the first time this vehicle has overheated.

Filed Apr 20, 2026 · Engine · AZ

This vehicle engine overheated. Leading up to the engine overheating event, there was an instance where the vehicle was driven for a mile or two and the air conditioning seemed to not be cooling. The vehicle was turned off for a few hours and restarted and the air conditioning appeared to work. However, the next day, the engine overheated. All repairs associated with this event were completed under warranty at no cost to the customer however, this is the 2nd Wagoneer we own and the other one had similar issues.

Filed Feb 16, 2026 · TX

While firing on the highway in the middle lane my car lost all power as soon as an Engine overheating light came on. This almost caused a larger pile up as cars starting swerving all over the highway to avoid my vehicle. I was able to safely coast to the shoulder without being hurt. After getting it looked at I was told my vehicle had a faulty thermostat yet by 2024 wagoneers VIN was not included in the batch they had put out.