2023 Jeep Wagoneer: sudden loss of power

Filed Oct 30, 2026 · Engine, Transmission · 93,392 miles · IN

Issues began on 9/29/26 - The transmission was slipping and failed to shift numerous times when accelerating causing a loss of power. This happened several times at highway speeds when passing. Warning lights came on after this issue occured. This issues happend several times over the course of about a month. These issues put my safety at risk multiple times when I was suddenly not able to accelerate to pass or in some instances not able to accelerate to enter the interstate. This issue also occured at a low speed in stop and go (interstate) traffic. The vehicle would not shift out of 1st gear and I was forced to drive on the interstate at a dangerously low speed until I could exit the interstate. Warning lights came on due to this issue. The Jeep dealership assessed the vehicle and determined that the transmission needed replaced. The transmission was replaced at a certifed Jeep Dealership. The vehicle was tested, deemed repaired, and returned to me. The next day the same issue occured where the transmission would slip, grind, and then lose power. That same day the vehicle lost power completely while driving. The engine shut off while I was driving. When I pulled over began to slow the vehicle automatically and abruptly shifted itself into park. This again put my safety at risk by the loss of power while driving and unexpectedly shifting into park. The vehicle is currently at the same Jeep Dealership being assessed. I

Filed Jul 9, 2026 · Engine · CA

While driving at low speed, the vehicle suddenly shut down completely without any warning. The engine lost power while I was cruising, causing the vehicle to stop responding. On separate occasions, the vehicle has also shut off while idling. This condition creates a serious safety concern because the vehicle can stall unexpectedly in traffic, increasing the risk of a collision. The issue has occurred multiple times and appears to be happening everytime i drive the vehicle. It started nov of 2025 up to now dealership cannot fix the problem.

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 Feb 12, 2026 · Electrical, Engine · MD

This complaint involves a 2023 Jeep Grand Wagoneer L Series III, a full-size luxury SUV. The vehicle has experienced repeated electrical and powertrain failures culminating in complete loss of propulsion. On 01/22/2026, while traveling approximately 45–50 mph, the vehicle abruptly shut down without warning. The engine lost power, dashboard displays went black, and multiple warning lights illuminated simultaneously. I was forced to steer to the shoulder while a trailing vehicle had to swerve off the roadway to avoid a collision. This was a near-miss event and represents a serious safety hazard involving sudden loss of motive power at highway speed. Prior to that event, the vehicle had already stalled at a traffic light and had exhibited repeated check engine warnings, low-voltage faults, and module communication errors. The servicing dealer documented multiple diagnostic trouble codes affecting the Body Control Module (BCM), Ignition System Control Module (ISCM), and Powertrain Control Module (PCM). Manufacturer technical service bulletin software updates were applied in attempts to correct the issue. Despite these interventions, the electrical instability persisted. On 02/12/2026, only days after an auxiliary battery replacement intended to address voltage concerns, the vehicle would not start and required towing to the dealership at my expense. Additional fault codes are currently under review. The vehicle is also subject to an open recall with no remedy available, and the power running board motor has failed with replacement parts unavailable. This pattern of electrical failure, sudden shutdown in motion, and inability to reliably start presents an ongoing and unacceptable safety risk to occupants and surrounding motorists. The vehicle is available for inspection and has been repeatedly evaluated by an authorized dealer.

Filed Sep 22, 2025 · Brakes, Engine · MA

Service brakes because the brakes engaged on their own while reversing, with no obstruction present. Power Train because the transmission downshifting unexpectedly in traffic, forcing us to pull over on the highway and restart the engine. Electrical because the rear camera blackouts while reversing fall under "back over prevention" and sometimes also electrical system. Engine because the oil pump solenoid failure with a complete oil pump replacement occurred. It's also an engine lubrication system failure which can cause catastrophic engine damage and loss of power.

Filed Jun 18, 2025 · Engine · OH

Vehicle suddenly lost power and overheated while driving. Had to get towed to the dealership. Dealer advised that the thermostat had failed, which seems to be a common occurrence with these vehicles. Thermostat was replaced but continued to overheat, leading the dealer to suspect the engine was warped and in need of replacement.

Filed Jun 13, 2025 · Electrical, Engine · NE

While driving my 2023 Jeep Wagoneer on 12 Jun 2025 I stopped at an intersection preparing to make a right turn. When I took my foot off the brake and prepared to accelerate, the vehicle abruptly turned off and lost all power and control. The instrument cluster said to shift to park in order to restart. I was able to restart the vehicle and drove it immediately to the Jeep dealership service. The dealership immediately scanned it, but was unable to diagnose the issue. We drove the vehicle back to our home and are now afraid to drive it due to concern over the vehicle shutting down while driving.

Filed Mar 1, 2025 · Acceleration, Engine · FL

Engine overheated and oil pressure low warnings came on suddenly and lost power. I had my two grandkids and was on a dark country road with ditches and no shoulders. Pulled off at the next cross street to get to safety. Was stranded at night in a rural area with my [XXX] and [XXX]. Had to have vehicle towed and wait for someone to pick us up. Thermostat failed, which is a known problem but my VIN wasn’t listed on the 26b notice. Engine was damaged beyond repair. It took three weeks for them to replace the engine. The morning after I picked up the Wagon, the brake warning light came on when the grandkids were in it again. The dealership told me to have it towed. They said they spilled brake fluid when they replaced the engine and refilled it. I paid nearly 100k for this unsafe car! There is no excuse for not replacing a cheap $50 thermostat to avoid this issue. Why haven’t they issued a recall? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)