2018 Jeep Grand Cherokee engine problems

Filed Oct 2, 2026 · Engine · 96,685 miles · NY

The contact owns a 2018 Jeep Grand Cherokee. The contact stated that while taking the vehicle to a service center for an oil change, the oil filter plastic housing unexpectedly warped after the oil change. The contact stated that after the failure, smoke was coming from the vehicle, and an oil odor was coming from the vents when the heat was activated. The contact stated that after the vehicle was parked at the residence, there was a trail of oil coming from the vehicle. The failure mileage was 96,685.

Filed Sep 25, 2026 · Engine · CA

Sudden loss of power while driving 75mph in the fast lane on [XXX] in [XXX]. My 2018 with the 3.0ltr Eco diesel engine was involved in a sever life-threatening event That caused my engine to fail while driving and I request immediate corporate escalation! On XXX while driving in the fast lane after just fueling up not more than 15-20min prior. my vehicle suffered, for no known reason, a catastrophic engine failure. There are no codes to be found (so said the dealer) "we cant tell you what happened to your engine", the dealer has sent me in writing. All of the sudden the dashboard read, " PULL OVER AND PUT IN PARK IMMEDIATELY".... I lost all power and was fortunate to ba able to catch an off-ramp to get off of the highway. After a 350mi tow to the walnut creek chrysler/jeep dealer. They were unable to tell me what went wrong or why a simple oil/ check engine light never happened to alert the operator? I was then told it would be a $35k engine replacement? most diesel engines historically run 250,000 to 500,000 miles and up with regular maintenance... I purchased this showroom quality vehicle from a private seller... never having even been towed 1 single time in its life before this event. I need to know what recourse that may exists for me regarding this most tragic and unsafe situation... So foreign investment groups can purchase USA auto factories and turn them into horible products... and that's okay? I have driven well over 1 million miles in my lifetime. I currently own 2 trucks, an Audi A3, 8 motorcycles, and a sprinter van RV. I formerly owned an Eagle tour coach. I am an experienced rider driver of nearly 40yrs on the road. please help [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 31, 2026 · Electrical, Engine · AZ

Subject: 2018 Jeep Grand Cherokee – Sudden Loss of Power, PCM Failure, Electrical Failures, and Concern Regarding Recall-Related Symptoms I am filing this complaint because my 2018 Jeep Grand Cherokee experienced a sudden and unexpected loss of power while I was driving, and I am very concerned about the safety implications and the possible connection to the recall-related electrical problems associated with this vehicle. Before the final failure, my Jeep had been experiencing electrical and starting problems. The alternator failed, the batteries went bad, and I had already paid for multiple diagnostics and repairs. At the time, we did not understand that these problems could potentially be leading to or connected with a PCM failure. I have spent approximately $800 on diagnostics and parts trying to determine and repair the cause of these issues. The most serious incident occurred when I was driving near a school and approaching a stop sign. The Jeep suddenly began losing power and would no longer operate normally. I did not receive an adequate warning that the vehicle was about to completely shut off. The dashboard/screen began flashing, electrical functions began going out, and the vehicle progressively lost power. I was able to slowly move the Jeep toward the right side of the road before it completely shut off. The Jeep then would not start again. This was extremely frightening because the vehicle lost power while I was operating it in an area where there were other vehicles and children nearby. I was concerned about my ability to safely get the vehicle off the roadway and about what could have happened if the Jeep had completely lost power in moving traffic or at a higher speed. The vehicle has since been diagnosed as having a PCM failure. I have already paid for diagnostics rather than simply bringing the vehicle in without any prior information about the problem. Despite this, the Jeep dealershiphas my vehicle now to determine if this is part of recall

Filed Aug 24, 2026 · Electrical, Engine · AZ

The Jeep was giving me a warning sign. It said stop slowly. Your jeep will shut off so I replaced the two batteries. As my Mechanic told me I replaced the alternator. I also replaced the ground wires. Nothing is making my jeep start. We ran the codes on the jeep and it came back as a U0100 code with the PCM system. No connection error. we looked up the recall information and a recall popped up for this 2018 jeep Grand Cherokee. I am being told that I am not affected by this recall.. the jeep was giving warning Saenz before I replaced the battery and alternator. After that. It did not give warning Saenz Anymore. It’s just completely Shut Off With no warning. Leaving me on the side of the road stranded twice. It will not start and it is reading these codes.

Filed Aug 18, 2026 · Engine · 125,000 miles · MI

The contact owns a 2018 Jeep Grand Cherokee. The contact stated that since the vehicle was purchased, there was an abnormally strong coolant odor coming from the vehicle. The dealer was notified of the failure and informed the contact that the coolant reservoir was recently refilled, and the odor might be due to an overflow. The contact stated that the failure persisted, and the vehicle was taken to the dealer, where the water pump was replaced. The contact stated that the water pump had been replaced approximately nine times under warranty due to the strong coolant odor and a water pump leak; however, the failure persisted. The vehicle was not yet repaired. The manufacturer was notified of the failure, and a case was filed. The failure mileage was approximately 125,000.

Filed Aug 12, 2026 · Engine, Fuel system · CA

Vehicle Information: 2018 Jeep Grand Cherokee Overland 3.0L V6 EcoDiesel 4x4Component Affected: Fuel/Propulsion System (High-Pressure Fuel Pump) Safety Incident Narrative: The vehicle previously underwent a mandatory manufacturer safety recall replacement for the Bosch CP4 High-Pressure Fuel Pump under FCA Safety Recall Z46 (the federal safety agency Campaign Number: 22V‑406). At 111,948 miles, while operating the vehicle, the engine suffered a sudden, catastrophic mechanical failure accompanied by an immediate and total loss of engine oil pressure. This caused the engine to suddenly stall and lose all propulsion while in motion, creating an immediate and severe highway safety hazard to myself and surrounding traffic.The vehicle was towed to an authorized Jeep dealership under Repair Order #5823328. The manufacturer (Stellantis) and the dealership are currently refusing to authorize diagnostic teardown labor or a mechanical review of the internal safety recall componentry to investigate an acute internal fuel-pump shaft seal leak or residual micro-particle metallic debris from the prior campaign. An internal drive-shaft seal failure on this replacement pump architecture dumps raw diesel fuel directly into the engine's internal oil crankcase, causing severe oil dilution, an immediate collapse of structural oil pressure, and catastrophic engine seizure. The manufacturer is attempting to shift 100% of the financial burden ($25,000 engine replacement cost) onto the consumer, actively obstructing an essential safety failure investigation into a federally recalled component.

Filed Jul 22, 2026 · Engine · TX

VEHICLE & PURCHASE DETAILS: 2018 Jeep Grand Cherokee (3.6L V6 Pentastar Engine). Purchased on/around April 27 in agreement with my credit union. INCIDENT & DEFECT DESCRIPTION: Upon taking delivery, the vehicle immediately displayed diagnostic warning codes. The selling dealer attempted diagnosis/repair for a week before directing me to take it to Bonham CDJR in Bonham, TX. Bonham CDJR cleared the codes and returned the vehicle. A couple of weeks later, while my wife was driving home, the engine suddenly and severely overheated without warning. I instructed her to pull over immediately to prevent engine destruction or stall in active traffic. My wife was stranded on the roadside in extreme Texas heat until a flatbed wrecker towed the vehicle back to Bonham CDJR. WARRANTY OBSTRUCTION & KNOWN FAILURE POINT: Upon arrival at Bonham CDJR, I informed service advisors that my third-party warranty provider (First Guard) would handle coverage. However, the dealership demanded a $1,300 upfront, out-of-pocket engine teardown fee just to "prove" the cause of failure to the warranty company. The 3.6L V6 Pentastar platform is notorious for cracking plastic oil filter/cooler housing units and failing thermostat assemblies, causing rapid coolant loss and overheating. Requiring consumers to pay massive teardown fees out-of-pocket to diagnose a known, unaddressed manufacturer design flaw creates an administrative barrier that leaves defective, dangerous vehicles on the road. SAFETY HAZARD & IMPACT: Sudden engine overheating at driving speeds causes sudden power loss, severe traffic hazards, thermal fire risks, and roadside stranding in hazardous ambient heat. This ongoing ordeal has caused severe personal distress, financial strain, and loss of wages. REQUESTED ACTION: I request the federal safety agency open a safety defect investigation into 3.6L Pentastar engine cooling failures and mandate a manufacturer recall with consumer repair reimbursement.

Filed Jun 17, 2026 · Engine · WI

* Upon normal driving the vehicle suddenly began to run rough. At that point the engine light came on and began flashing. Yes, it is available for inspection * I was traveling at highway speeds with my two young son's in the vehicle, when out of nowhere we experienced a major loss in power, Forcing us to get to the far right lane and off on the next exit. * The problem has been Confirmed (Passenger Side intake camshaft has 5 out of 6 lobes significantly worn off. .119" of material missing as well as 2 holes on cylinder 6 piston. * It was inspected by and independent mechanic who discovered the damage to the camshafts and the piston. It was suggested that I return the vehicle to the dealer as it would be needing a new motor seeing as the damages were premature and catastrophic in nature. Upon initial inspection at the dealer, they failed to identify the 2 holes in cylinder 6 piston. Suggesting that the "said holes" were nothing other than flaked carbon deposits. * There were no warning lights or any symptoms that would have indicated anything was wrong.

Filed Jun 10, 2026 · Body, Engine · FL

See attached document for complaint.

Filed May 28, 2026 · Engine · NY

Cylinder Misfires OBD-II code P0303 Engine Overheats after changed thermometer Fuel in the coolant system Coolant leaking from exhaust