2019 Jeep Grand Cherokee Engine Problems

Vehicle: 2019 Jeep Grand Cherokee Engine: 3.6L V6 (Pentastar) While driving on the highway, the vehicle experienced a sudden engine overheating condition, followed by a catastrophic failure of the coolant recovery tank. This failure created a serious safety hazard and appears to be the result of a known and well-documented head gasket defect in the 3.6L engine used in Jeep Grand Cherokees. While driving at highway speed, the vehicle was operating normally until I made a left turn. Immediately after the turn, the engine temperature began to rise rapidly, indicating an overheating condition. I turned around and began driving back toward my residence to avoid further damage or a roadside breakdown. Before reaching home, the coolant recovery tank violently exploded, releasing coolant throughout the engine bay. As well as strong burning coolant chemical smells throThis occurred while the vehicle was still in operation and could have resulted in loss of visibility, fire risk, or complete engine failure while driving. After inspection by a qualified professional, the failure was confirmed to be caused by a failed head gasket, which allowed combustion gases to pressurize the cooling system until the coolant recovery tank ruptured. This failure occurred without warning and while the vehicle was being driven on public roadways. A sudden coolant system explosion and rapid overheating can result in: Loss of engine power while driving Fire risk from hot coolant contacting engine components Loss of vehicle control Stranding occupants in unsafe conditions This represents a significant safety defect. Jeep Grand Cherokees equipped with the 3.6L engine are widely known to experience head gasket failures, typically occurring between 50,000 and 75,000 miles. Despite this known issue, Stellantis/Chrysler has not issued a recall, technical service campaign, or extended warranty related to this defect.

While driving at highway speeds, with no warning, my vehicle shuts off forcing me to perform and emergency exits. In these situations, I have observed the dashboard screen directly in front of me read: Vehicle Not In Park

2019 jeep grand Cherokee 3.6L. Severe misfiring on expressway causing vehicle to shake uncontrollably and stall. “Pentastar tick” Ticking sound coming from engine. Took to local repair shop and right cam shaft is worn down causing misfiring and engine damage. Cost is $4,000 for the camshaft replacement and will likely need a new engine. Vehicle has less than 109,000 miles on it. Known issue on this vehicle, I called multiple shops and they all said that the can shaft is probably bad because they see the issue all the time.

The contact owns a 2019 Jeep Grand Cherokee. The contact state while driving at various speeds, the engine overheated and there was a misfire coming from the engine. The check engine warning light was illuminated. The message that the Auto START/STOP system needed to be serviced was displayed, and that the engine was overheating. The vehicle was taken to the dealer on several occasions, and the camshaft, the water pump, and the EGR were replaced; however, the failure persisted. The vehicle was taken back to the dealer, where the camshaft phasers and the oil control valve were replaced. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was approximately 76,000.

The contact owns a 2019 Jeep Grand Cherokee. The contact stated while driving 40 MPH, the contact heard an abnormally loud knocking sound coming from the engine compartment. The START/STOP warning light was illuminated. The contact stated that while attempting to accelerate, the vehicle stalled. The vehicle was able to be restarted. The vehicle was taken to the dealer, where it was diagnosed and determined that the head gasket had failed, causing coolant intrusion into the engine. The contact was informed that the head gasket needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 130,000.

My 2019 Jeep Grand Cherokee (3.6L engine) suffered a sudden and catastrophic engine failure immediately after the dealership misdiagnosed a coolant leak from the oil cooler assembly. The oil cooler on this engine has a well-documented history of cracks, coolant contamination, and sudden oil loss across multiple Jeep model years. On October 25, I reported a coolant leak to the dealership, including a photo of bright pink coolant. The service advisor incorrectly told me it was “oil mixed with coolant,” did not document urgency, and did not involve a technician. I received no warning that this leak was dangerous or likely to cause engine failure. Within about a week, the oil cooler assembly failed, dumping the engine oil, causing smoke, knocking, and complete engine destruction. There was no prior warning from the dealership despite me reporting this issue directly. The dealership later created service notes that inaccurately stated they “informed me of a leak,” which is untrue. I informed them. Their failure to diagnose and communicate the seriousness of this defect directly resulted in my engine being destroyed. This failure mirrors hundreds of other owner reports regarding oil cooler cracks on the 3.6L Pentastar. This appears to be a pattern of premature oil cooler failure with severe safety consequences and no recall.

Car shifts out of gear without pushing the brake. The gear shifter will switch to neutral while driving. While not driving car can shift into reverse without pushing the brake and barely touching the gear shifter. Thai cause the car to stop at high speeds on the highway and unsafely go into gear. This recall has been unresolved for at least a year and is dangerous.

The contact owns a 2019 Jeep Grand Cherokee. The contact stated that while driving at 65 MPH, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was determined that the engine was misfiring and there was a minor water pump leak. The dealer changed the drive mode from level 4 to level 2, and the check engine warning light was reset. The dealer advised the contact to take the vehicle back to the dealer later. The vehicle was taken back to the dealer, where it was diagnosed and determined that the spark plugs, the cylinders, the head gasket, and other unknown parts needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was not notified of the failure. The failure mileage was approximately 97,002.

I am writing to express my serious concern and request immediate goodwill assistance regarding my 2019 Jeep Grand Cherokee High Altitude . This vehicle has suffered a head gasket failure at just over 100,000 miles and has been diagnosed by the dealership as a cost for myself to fix head gasket and recommended a full engine replacement. I have been a loyal Jeep customer since I was 16 years old. I previously owned a 2008 and a 2010 Grand Cherokee and have always supported the brand. In May 2022, after saving up my hard-earned money, I purchased this 2019 Grand Cherokee High Altitude for over $55,000. The monthly payments are significant, but I chose this vehicle because I believed in the Jeep name and expected quality, performance, and long-term reliability. Unfortunately, this vehicle has been anything but that. In just over two years, it has become a complete money pit. I’ve already had to replace the water pump at 50,000 miles, the radiator at 80,000 miles, and now—at 102,000 miles—the head gasket has blown. These are major repairs that should not be happening on a vehicle that is so well maintained and primarily driven on the highway. I treat this vehicle like my own child, staying on top of all maintenance—fluids, filters, routine checks, and oil changes every 5,000 miles. I’ve also had to pay out of pocket for three separate rental vehicles in the last 18 months due to these recurring issues. This vehicle has not only been unreliable but has also disrupted my ability to work. I drive for a living, commuting between multiple job sites, and I chose this vehicle for its sharp look and supposed quality. Instead, it has caused me immense stress and financial strain. Adding to my frustration is the fact that I had a 7-year/100,000-mile warranty and was not notified that it was about to expire. Had I been properly informed, I would have explored my options before this latest major failure. It's clear that the 3.6L engine has a pattern of issu

While driving at freeway speeds, my vehicle suddenly lost power, creating an immediate and serious safety hazard. I was unable to maintain speed, making it extremely difficult to change lanes safely or keep up with traffic. This put me—and others on the road—at significant risk of an accident. During the incident, the check engine light was flashing continuously. The issue was diagnosed as a failure of the engine rocker, requiring major engine repairs at only 87,000 miles. A critical engine component failing at this mileage is concerning and suggests a potential design or manufacturing defect. I’m filing this complaint to ensure others are not placed in similarly dangerous situations.

My 2019 Jeep grand Cherokee currently has a blown head gasket. I have the 3.6 engine and I am finding out that this is a common issue for this engine. I have taken my car to the dealer and they have confirmed that it is a blown head gasket. Once you start the vehicle, it has a rough idle and smoke comes out of the tailpipe. Before I took the car to the dealer, I took it to a mechanic shop because the engine light came on and it was having the same issues as listed above, they had said there were misfires. I have regularly maintained my vehicle. This is a huge safety risk. Actions needs to be taken by Jeep to make this right, this is a very common issue that Jeep Grand Cherokee vehicles are seeing.

The contact owns a 2019 Jeep Grand Cherokee. The contact stated that while starting the vehicle on several occasions, there was an abnormal tapping sound coming from the engine compartment. The check engine warning light was illuminated. Additionally, the contact stated that while driving at various speeds on several occasions, the check engine warning light flashed, and the vehicle started shuddering. The vehicle was taken to an independent mechanic, where it was diagnosed that the lifters needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 57,000.

The contact owns a 2019 Jeep Grand Cherokee. The contact stated while driving at an undisclosed speed, the vehicle stalled and then lost motive power with the check engine warning light illuminated. The vehicle was towed to the dealer where it was diagnosed that the engine failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was made aware of the failure. The failure mileage was approximately 160,000.

Camshaft failure caused misfire while driving. The car is currently being repaired so there are no receipts yet.

The contact owns a 2019 Jeep Grand Cherokee. The contact stated while driving at various speeds, the temperature gauge rose to HOT, and the vehicle would hesitate while depressing the accelerator pedal. The contact had taken the vehicle to an independent mechanic where a diagnostic test was performed. The diagnostic result indicated that the O-rings on the bottom of the coolant module were worn and that the oil filter adapter needed to be replaced. The vehicle was then taken to another independent mechanic where coolant intrusion inside cylinder #6 was found. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 95,600.

Jeep starting making a light ticking sound, like it's low on oil. That wasn't the case. Took in for a tuneup, hoping that would take care of it. It didn't. Took into dealer and the camshaft, rods had been chewed up to a faulty part inside the engine. I didn't have my vehicle for two months due to waiting on warranty company. When reached out to Jeep groups,learned this is s COMMON problem. Concerned my engine could have frozen up while driving. NO warning lights or any other symptom! If my parents hadn't taught me how to listen to vehicles, it could have been very bad turnout. This cost me almost $4k. This should be investigated!!

While driving 65 mph on the highway, the jeep lost all acceleration. I was able to get to the shoulder and the car said to put it in park. I did and then was unable to shift to any other mode. The brake pedal was hard as a rock and would not move. The air then turned hot. When I turned the vehicle off and back on - everything seemed fine but losing power on a major highway was extremely dangerous. No warning lights or messages. No other symptoms prior to this instance. Car is currently at independent service center and they cannot determine what is wrong.

While at the dealer to have a lightbulb changed, I was told that I needed to have my oil adapter changed. My jeep only has 33,750 miles on it and has only been serviced by the jeep dealer. While I was there there were 2 other jeeps in with the same problem. Also, my brother-in-law's brother (who lives in another state) also had to have his oil adapter replaced on his jeep grand cherokee. Does jeep have a defective part installed in the grand cherokees? If not, I find it odd that so many people (that I do not know personally) have had to have the same part replaced on their jeep grand cherokees.

5.7 hemi exhaust manifold heat shield bolt break off because the manifold warps with heat. This can cause the manifold to leak after a while. And make a nocking nose the dealer said it a know problem and flew with the 5.7hemi between 70000 to 100000

The Water Pump of my vehicle was leaking from the weld of the engine causing anti-freeze to leak. This caused an issue with possible overheating since it was not leaking from the weep-hole. It could have gone unnoticed and i would like to know if there is a recall for this issue.