Jeep Wagoneer engine failure 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 23, 2026 · Electrical · 38,000 miles · AL

The contact owns a 2024 Jeep Wagoneer. The contact stated that upon coming to a stop, the engine Auto STOP/START system engaged; however, the engine failed to restart automatically and required to be manually restarted. The contact stated that the failure was a recurring failure. The power steering warning light was illuminated after the failure. The vehicle was taken to the dealer; however, the service personnel refused to provide the diagnostic information because the contact declined to pay for the diagnostic test. The manufacturer was notified of the failure, a case was filed, and the contact was awaiting a callback from the manufacturer. The failure mileage was approximately 38,000.

Filed Oct 16, 2026 · Engine · KY

The thermostat suddenly failed, causing extensive engine failure. The engine failure was the direct and unavoidable consequence of a known manufacturer defect explicitly covered under Customer Satisfaction Notification 26B and TSB 09-006-25 / RSU 25-047 which should have replaced my thermostat or been a recall.

Filed Sep 23, 2026 · Electrical · SC

While driving, vehicle suddenly displayed low voltage and "power saving mode" error messages. Multiple systems shut down including AC and radio. With engine stop/start disabled, engine died while slowing to a stop, automatically engaged parking brake, and vehicle shut down. Was able to restart and limp home. Vehicle would not re-start after shutdown. Battery was completely discharged (<9V) and still hot to the touch 4 hours after turned off. Battery tested good, but was replaced out of caution. Current static battery voltage 12.3V. Charging voltage while running 13.4V. Voltage while running with heavy electrical load (AC, radio, heated seats, headlights on) 12.9V. Believe this to be related to known issues with eTorque generator

Filed Aug 12, 2026 · Engine · FL · fire

My car blew an engine while I was inside the car. The car was in park and running in a parking lot when the parking brake automatically engaged unexpectedly. Then, the gauge cluster instructed me to press the brake and push the start/stop button. I then got a warning on my gauge cluster, this time notifying my car entered starter protection mode. Repeating the process three times, me, my four year-old daughter, and were put at high risk of suffering burns as my car started to give off a burning smell of oil, as well strong white smoke from the hood, and shut off the car and opened the hood to release the smoke. If I had waited longer, there would have been a fire. The car is available upon inspection and is currently at my local dealer as of 8/11/2026 (Thunder Chrysler Dodge Jeep Ram, Bartow, Florida) for repairs. An engine failure was confirmed by discoveries by the dealer of a broken valve spring, a dropped cylinder, a cracked piston head, and an oil-coolant mixture. The dealer confirmed that this stemmed from Stellantis's faulty "Multi-Displacement System" (MDS) cylinder-deactivation system and "eTorque" mild-hybrid system. Both systems work together to save fuel at cruising speeds and stoplights. However, due to the constant cycling of both systems, they contribute to the excessive engine stress and oil pressure fluctuation, which are known for the "WS" Jeep Wagoneer, the "DT" RAM 1500, and the "WL" Grand Cherokee equipped with the 5.7L HEMI eTorque V8. The dealer relayed the issues to Stellantis North America, showing videos and photos of this catastrophic mechanical failure.

Filed Jul 10, 2026 · Driver assistance, Engine · TN

On at least 6-8 occasions car engine has shut off and car is automatically placed in emergency brake. This then requires you to place car in park, then restart vehicle. This happens while driving on interstate and when car slows down for traffic car engine without warning, will shut off, car will then automatically turn on emergency brake forcing sudden stop in interstate hwy traffic. Very dangerous as you have to place car in Park and restart engine. Cars behind you are now slamming on brakes to avoid rear end collision. This has also occurred while sitting at traffic light when again car engine shuts off and has to be placed in park to restart. There is no warning, no warning lights, no check engine after incident occurs and according to dealership no engine codes recorded due to incident. I have left car at dealership on several occasion for several days. I believe it was replicated at dealership but again it registers no codes in engine computer to help resolve issue. When a car traveling down the interstate suddenly shuts down it is extremely dangerous placing my car and family at risk as well as any traveling behind us. Dealership has not been able to resolve issue. They can update software and the car will go several weeks without issue then suddenly you are back to engine shut down again I am second owner of 2024 Jeep Wagoneer S II Carbine. Purchased at GMC dealership. At time of purchase dealership provided maintenance records which showed no issues of engine failure. Unfortunately Jeep is not going to document this issue and does not appear to have a solution. This is an extreme safety concern

Filed May 29, 2026 · Engine · TN

I am reporting a catastrophic engine failure on a 2023 Jeep Wagoneer (VIN: [XXX] ) that occurred within 163 miles of consumer delivery, suggesting a latent manufacturing defect present at the time of sale. The vehicle was delivered February 13, 2026 at approximately 29,750 miles. Engine noise was noted the same evening. By March 10, 2026, the vehicle was grounded at Farris Motor Company [XXX] ) at 29,913 miles — 163 miles after delivery. The vehicle remains inoperable after 60+ days. Stellantis STAR Case #XXX documents the following confirmed failures: collapsed lifters, failed camshaft, damaged rockers, and scored cylinder walls. Technician notes in the official STAR Case record state the engine oil contained metal contamination so severe it "looked like paint." Borescope imaging confirmed scoring on cylinder walls. Stellantis has thus far refused to authorize a full engine replacement, instead directing the servicing dealer to replace only individually identified failed components — despite the fact that metal contamination of this severity compromises the entire lubrication circuit, including both turbochargers. The servicing dealer (Farris Motor Company) has independently advocated to Stellantis for full engine replacement and agrees the partial repair is insufficient. I am reporting this failure to the federal safety agency to document the defect pattern and request investigation into whether other 2023 Wagoneer vehicles with the 3.0L Hurricane engine may be experiencing similar latent valvetrain failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 15, 2026 · Engine, Transmission · OR

Our 2023 Jeep Wagoneer overheats (indicates excessive oil temperature and low oil pressure) repeatedly (~20 times since we've owned the vehicle) under normal freeway driving causing a safety issue by creating the need to rapidly slow and exit the roadway to prevent vehicle engine failure. The issue occurs during sustained freeway driving around 60-65 mph. The car feels like it is not properly shifting to the next gear and the RPM lingers around 3000rpm - 3500rpm. After a few minutes at this sustained RPM the engine temperature gauge slowly climbs until the overheating warning light comes on and it typically followed by a low oil pressure warning. We have taken the vehicle to a Jeep dealer twice. They have tried to replicate the issue and have not been able to. We suspect that they are not driving in long enough (30-40min) to be able to replicate the issue. They also say that they are not able to pull up any error codes from the vehicle from an ODB scanner. They say they can't diagnose the issue with out an error code and seam to be unwilling to explore the issue further. Most recently we've purchased our own ODB scanner to try to gather any error codes because the Jeep dealer doesn't seam to want to investigate further without us gathering error codes for them. Today we drove the car for about 45min on moderately hilly terrain at around 60mph and produced three separate overheating / low oil pressure error incidents while the ODB scanner was plugged in. The ODB did not indicate an error code on any of the three incidents. We are frustrated because Jeep and their dealers have left us in a situation where we have a dysfunctional vehicle and seam to be unwilling to take reasonable measures to resolve the problem.

Filed Feb 11, 2026 · Engine · PA

I wes driving and the over heat light came on in pulled over and had car towed to dealer. The dealer pulled the report and they said I needed a new engine and that I drove 40 miles in limp mode. There was no lights or indicators that there was an issue until the car overheated in that time it was only drove 3 miles. They cannot pinpoint when the light would ha e turned on and now I am stuck with a broken engine that stelantis is refusing warranty coverage but the car failed to alert me there was an issue

Filed Nov 12, 2025 · Engine, Transmission · PA

The Wagoneer with 20,000 miles very suddenly started to overheat, then quickly redlined on the dash board. Car shut down at dark night intersection. Needed to be towed to dealer. Dealer diagnosed that the ENGINE needs to be replaced. WTF. Waiting for Jeep Claims rep to contact me. Case # 94698805. No word on ETA of replacement engine. Expecting a long term rental car. NOT HAPPY I'm financing at $800 per month car in shop for who knows how long. Dealer claims they have 2 other Wagoneers on the lot with same engine verdict. Is there a BUY BACK policy available? lol.