2018 Jeep Wrangler engine problems

Filed Nov 3, 2026 · Electrical, Engine · TX

Vehicle shutting off. Keeps spitting warning lights. Engine hot

Filed Sep 18, 2026 · Engine · SC

Misfire no. 4cylinder due to head gasket leak and coolant leaking into cylinder.

Filed Sep 17, 2026 · Engine · MA

See attached document for complaint.

Filed Jul 13, 2026 · Engine, Fuel system · CA

I purchased this 2018 Jeep Wrangler JK Unlimited on July 19, 2025. Since purchasing the vehicle, I have experienced repeated mechanical failures that have required multiple repairs. The most serious issue involves the engine overheating at highway speeds without any visible coolant leak or clearly identifiable cause.Despite seeking professional diagnosis, the source of the overheating could not be determined. Shortly afterward, the vehicle developed a P0302 (Cylinder 2 Misfire), raising concerns about possible internal engine damage caused by the overheating.I believe this presents a significant safety hazard. An engine that overheats unexpectedly while driving at highway speeds can lose power or fail without warning, creating a dangerous situation for the driver and surrounding traffic. The vehicle has become unreliable and unsafe to operate because I cannot predict when it may overheat or experience another engine failure.As someone who often drives alone, I no longer feel safe taking this vehicle on long trips. I am concerned that the vehicle could leave me stranded on a highway or in a remote location without warning, placing my personal safety at risk. A vehicle should provide dependable transportation, not expose its occupants to the possibility of sudden mechanical failure.This vehicle has spent more time in repair facilities than on the road. I have incurred thousands of dollars in repair expenses, and I am now being asked to pay for an engine teardown simply to determine the cause of the failure before any warranty consideration can be made. Despite multiple repair attempts, the underlying cause of the overheating and engine problems has not been resolved.I am submitting this complaint because I believe the repeated overheating, unexplained engine malfunction, and resulting cylinder misfire may indicate a safety-related defect that warrants investigation. I request that the review to determine whether similar failure whether a broader safety issu

Filed Jun 22, 2026 · Electrical, Engine · MA · fire

What component or system failed or malfunctioned, and is it available for inspection upon request? Jeep started on fire and is still at a tow yard in Belchertown, MA How was your safety or the safety of others put at risk? The Jeep started on fire while I was driving. I pulled over as the engine was smoking and then it burst into flames while I was still inside. Has the problem been reproduced or confirmed by a dealer or independent service center? Not that I know of. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Yes, we gave permission for our insurance agency and Jeep to inspect the burned out vehicle. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? While I was driving, the engine temp and coolant warning lights shot way up and then the engine began to smoke. I pulled over and before I could exit the vehicle, fire was coming into the cab through the air vents.

Filed Jun 10, 2026 · Engine, Transmission · 100,000 miles · FL

The contact owns a 2018 Jeep Wrangler. The contact stated that while driving at an undisclosed speed, the steering wheel seized and the vehicle failed to accelerate. The electronic parking brake, check engine, and several other unknown warning lights were illuminated. The contact shifted to park (P) and then drive (D) and was able to continue driving. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was taken to an independent mechanic, who determined that coolant had leaked into the computer and damaged the battery pack control module. The mechanic related the failure to Customer Satisfaction Program: Y40 (Control Module Software Updates); however, the VIN was not included. The vehicle was then towed to an unknown dealer; however, the vehicle was not yet diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.

Filed May 22, 2026 · Engine · OH · crash

Was stopping at red light. Got to about 5mph when Jeep accelerated to about 35mph. I was standing on the breaks but the Jeep kept accelerating until impact struck the car in front me which was stopped. I have video.

Filed May 18, 2026 · Electrical, Engine · VA

I bought this vehicle used in 2022 from CarMax. According to Jeep (Stellantis) Co. multiple recalls were fixed by the previous owner, but the patch available for 2018 Jeep Wranglers was not done. In 2024 my iphone and Mac laptop were hacked and shortly after I began having problems with my 2018 Jeep Wrangler. My alarm system started going off while I was in my home without touching or being near the FOB. When I used my FOB to unlock the doors, they would lock back before I could open the door. I was unable to use the push button start for a few minutes up to 15 minutes and in 2025 I was unable to use the push button at all on most days. I had to research a work around to be able to start my Jeep and even after that depending on the day, it takes several seconds to minutes to start it this way. On 2 different occasions as I was driving, I had no control over my steering for approx. 10 seconds. I held on to the wheel and slowed down. The control returned and I was able to drive home. I researched and found out that 2014-2018 had reports of hacking and the hacker taking control of the vehicle in multiple ways including steering, brakes, alarm system, and hacking FOB. My radio has been turned off and the stations changed. One of my FOBs was tampered with, including switching the lock and unlock button's capability, panic button was disabled, and now the FOB does not work at all. There is a loud grinding noise behind my glove box that can be heard at different times including when Jeep is turned off. Loud noises that sound like a rock hitting the window happen randomly to my front windshield, driver and passenger windows happens multiple times while I am driving and when vehicle is turned off. I took Jeep to a trusted mechanic and was told there was no way to tell and it would be better to just sell it. After I moved, I didn't experience these problems for a while, but am experiencing them again. I am concerned for my safety and anyone who may be a passenger in my Jeep.

Filed May 17, 2026 · Engine · NV

Engine - The vehicle is available but the engine was replaced. I was able to get home however there was a potential for significant engine failure. Yes it was inspected by an independent service center. Yes it was inspected by an independent service center. A check engine light came on. Upon further inspection it was a Cylinder 6 misfire P0306. When the engine was inspected further by a mechanic it was determined that the cylinder wall was damaged and that coolant had entered the cylinder. Due to the extent of the engine damage the engine needed to be replaced.

Filed May 16, 2026 · Engine · KY

Oil cooler failure at 7 years and 90000 miles. This is a known engineering issue due to a plastic housing that is resolved by upgrading the oil cooler housing to aluminum instead of plastic. It’s a $1000 repair. Because this is an engineering issue the consumer should not have to pay the entire cost of the repair. This is a SAFETY AND ENVIRONMENTAL HAZARD DUE TO THE LEAKAGE OF OIL CAUSED BY THIS FAILURE. It should definitely be deemed a recall and fixed at the expense of the manufacturer!