2018 Kia Sorento Engine

My car had an issue that was covered under a class action lawsuit. I even had an extended Warranty which was still valid at the time. I was intimidated by the warranty company when they said well if there is carbon build up in the engine the cost of the repair is on you. So I didn't have it fixed and the engine blew up and is now inoperable in my driveway. So bottom line I couldn't get KIA to help me or the extended warranty company when clearly it was KIA's responsibility to fix there defect in the engine.

On January 30, 2026, I was driving with my daughter from Kansas City to Platte City when the vehicle experienced a sudden and catastrophic mechanical failure. As we approached our exit, the engine unexpectedly revved and the vehicle rapidly decelerated to approximately 30 mph. When I attempted to accelerate, the vehicle was unable to properly gain speed. Upon reaching the top of a hill at an intersection, the engine completely shut off and the vehicle became disabled in the roadway. The vehicle was towed and inspected by two independent repair facilities. Both repair facilities confirmed catastrophic internal engine failure. A bore scope inspection identified a broken valve in cylinder 4, along with severe internal engine damage. The first repair facility estimated the cost of engine replacement at $9,600. The second repair facility confirmed the same diagnosis and recommended full replacement of the long block assembly. Copies of the inspection reports and repair estimates are attached. Due to the extent of the internal damage and the high cost of repair, the vehicle is considered mechanically inoperable and beyond reasonable repair. The cost of repair is substantial and exceeds our ability to proceed with repairs. At the time of the mechanical failure, approximately two years remained on the finance agreement, with an outstanding loan balance of approximately $12,000. As a result of this catastrophic mechanical failure, the vehicle is unusable, and a financial deficiency remains on the loan. Although the engine carried a warranty, we were informed that the specific failure was caused by internal component failure and material shedding, which is not covered under the warranty terms. Supporting documentation, including diagnostic findings, repair estimates, and photographs of the failed engine components, are attached. Due to the sudden and catastrophic mechanical failure, the vehicle has sustained a total mechanical loss and is no longer operable.

Noticed excessive oil consumption that turned into burning oil when the exhaust turned back of car black. Engine started knocking due to gummed up spark plugs. Replaced the spark plugs but within weeks the new plugs where gummed up as well. Took to Kia for diagnosis and potential repair for theta 2 class action. Mechanic confirmed damaged spark plugs, piston issues and needs for new engine.

Excessive oil consumption

The contact owns a 2018 Kia Sorento. The contact stated that upon starting the vehicle, there was heavy white smoke coming from the exhaust pipes. There was no warning light illuminated. Upon taking the vehicle to an independent mechanic for an oil change, the contact was informed that there was an oil leak coming from the engine. The contact had her son inspect the vehicle, and he discovered that oil was leaking onto the spark plugs in cylinder #1. The contact’s son diagnosed the vehicle with engine failure and recommended that the engine be replaced. The contact then stated that while driving 60 MPH, the vehicle started shaking with the check engine warning light illuminated. The contact pulled over and waited for approximately an hour before being able to restart the vehicle and drive to the destination. The vehicle was then taken to a dealer, where a diagnostic test was performed, and the dealer discovered several oil leaks in various cylinders. The vehicle remained with the dealer. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.

The engine suddenly failed while I was driving on the highway. The vehicle lost power without warning, which created a dangerous situation. I had to pull over and have the vehicle towed.

Started the car and heard a knocking sound. No check engine or low oil light on the dash. Dealership said the bearing clearance test was too great, causing the connecting rod to knock inside the engine. Dealership said I need an engine replacement. Engine is 3.3L Lambda II engine which has been reported to have this issue.

My Vehicle’s Problems Excessive Oil Consumption My engine kept losing oil far more rapidly than normal. I was regularly checking and had to top off the oil, even though mileage suggested it should not be that frequent. However, there was no “check engine” warning light or low-oil warning light even when the oil level was dangerously low. Despite the oil being burned or lost, none of the sensors ever alerted me. Eventually, before my next scheduled service, the extreme oil loss culminated in catastrophic failure: the engine seized, and the car is now completely undrivable. Engine Failure / Seizure The engine’s seizure was sudden and without any prior warning. There was no indication via “check engine” light, oil light, or other dashboard warnings. I have obtained an estimate for replacing the engine, and regrettably, the cost of a new engine exceeds the current value of the vehicle. This is deeply unfair, given that the root cause appears to be excessive oil consumption, not misuse or accident. Lack of Responsiveness / Remediation I feel that despite my efforts to maintain the car and monitor oil levels, I was left to fix a major and very expensive defect. I request that Kia take full responsibility: cover the engine replacement (or provide a buyback / repurchase option), reimburse me for costs, or find another equitable remedy.

Engine is burning oil at a rate of almost one quart per week. The engine can be felt shaking when driving. The engine light came on and states there is a P0303 Cylinder 3 misfired detected.

I bought a used Kia sorento from a Kia Dealership. This engine makes oil evaporate completely. This engine must be a bad engine. I heard there was some recalls on Kia engines not sure if this one fits it. The dealership did a five hundred dollar job on it and it did not fix. I put oil in this car every month. No way to upgrade because of these issues.

Started with check engine light coming on then having problems with engine knocking last winter. During oil change and oil filter change there were gold "sparkles" throughout the old oil and the filter was completely covered. It appears some component of the engine is being "chewed" up and destroying our engine. It is now undrivable. I was told by our local mechanic shop to contact KIA or NHTSA regarding a special extended warranty from KIA specifically for engine issues. I am not finding anything specific online, so wanted to reach out. I am waiting to hear back from local KIA dealership service department as well.

KIA Sorento 2018 The vehicle experienced engine failure due to piston ring damage at approximately 111,500 miles. A Kia dealer diagnosed the issue with codes P0301 and P0304 and confirmed the engine requires full replacement. This creates serious safety concerns, including engine misfires, loss of power, and risk of stalling while driving.

The contact owns a 2018 Kia Sorento. The contact stated that upon starting the vehicle, the vehicle made an abnormal knocking sound. Additionally, the contact stated that while driving and depressing the accelerator pedal all the way to the floorboard, the vehicle failed to exceed 18 MPH. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed, and the failure was linked to the knock sensor detection system(KSDS). The vehicle was not repaired. The local dealer was unreachable. The manufacturer was not notified of the failure. The failure mileage was 85,798.

I was driving and the vehicle shut off. All electric still on lights, radio, dash, etc. No issues or noises indicating that the engine was having faliure. Did not overheat, had oil and gas. Just bought car used 6 months ago with 140k miles. Had it towed to Mechanic and was told the engine was locked. Engine repair is my only option that is going to cost 5-8k. Vehicle has been maintained regularly with only one previous owner and no major repairs ever needed to be done.

I am writing to express my concern regarding a serious issue with my 2018 Kia Sorento equipped with the 2.4-liter engine. The vehicle has been experiencing excessive oil consumption—approximately one quart every 400 miles—which I believe may be indicative of a manufacturing defect. Based on similar issues reported with more recent Kia models, including those involving potentially defective piston oil rings, I am concerned that my vehicle may be affected by a similar issue. As you are aware, defective piston rings can lead to long-term engine damage, sudden loss of power, and even an increased risk of engine fire. Given the severity of the symptoms and potential safety implications, I respectfully request that this matter be formally investigated and that Kia consider extending the recall or offering a resolution for affected 2018 Sorento models. I look forward to your prompt response regarding this issue.

Excessive oil consumption, 4 quarts in 2000 miles

Engine oil is always law. Engine eats lots of oil.

The contact owns a 2018 Kia Sorento. The contact stated that while driving at various speeds, the engine was making an abnormal knocking sound. The contact stated that while slowing for a traffic sign or stop lights, the vehicle was shaking and vibrating abnormally. The contact stated that while depressing the accelerator pedal, the vehicle started making the knocking sound again. The check engine warning light illuminated and was now constantly illuminated. The contact stated that prior to the sounds and check engine warning light being illuminated, the contact was constantly adding engine oil, even after an oil change. The contact had taken the vehicle to a dealer, who diagnosed the vehicle and informed the contact that the engine was failing and needed to be replaced. The vehicle was not repaired. The contact stated that the engine was replaced in 2019 by the same dealer. The dealer requested that the engine be replaced; however, the manufacturer later informed the contact that the request was denied. The manufacturer was contacted, and the contact requested an escalation to review the engine replacement and was informed that the escalation had been denied. The failure mileage was approximately 178,000.

Engine burns and eats up lots of engine oil. Engine oil is always low.

The contact owns a 2018 Kia Sorento. The contact stated while driving at an undisclosed speed, the vehicle lost motive power. The check engine warning light was illuminated. The vehicle failed to restart and was towed to an unknown dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 89,000.

I had an engine failure in my Kia. On [XXX], I was driving on [XXX] in Maine, and the "malfunction" light lit up, and I lost power in the vehicle. I was able to make it to the side of the highway and call a tow truck. Losing power on a busy interstate put myself and my partner at risk, as well as having to wait on the side of the interstate for a tow truck. I had the vehicle towed to a mechanic who said the engine needed to be replaced because a cylinder lost compression. Kia had me tow it to a Kia dealership, and they verified that the engine needed to be replaced. The matter is still open. My case with Kia is [XXX]. Kia has been completely unresponsive in the matter. They have told me repeatedly that the matter is being looked into by their tech team, but they have never reached out to the Kia dealership they told me to send it to. It could be related to a rod bearing issue, but they are not willing to follow up enough to even determine whether or not that is the issue. Prior to the engine failure, I had issues with oil loss. I replaced the PCV valve, but that did not turn out to be the problem. I had it inspected a few weeks before the engine failure, and they noted that the oil levels were low. I was not seeing warning lights for low oil, but I was maintaining oil levels while I waited for an appointment to look into that issue. I believe Kia knows this is an ongoing issue with their vehicles, and they are actively obstructing any inquiries as to why this engine problem persists. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2018 Kia Sorento. The contact stated while driving 20 MPH, the vehicle lost automotive power. The contact stated that the failure had occurred on several occasions. The check engine warning light was illuminated. The vehicle remained at the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Was driving car it lost power, pulled over and had tow truck bring car to dealership. Dealership states a new engine is needed due to a malfunction in the engine block, however warranty is out on car just by 9,000 miles and car is still financed! Maintenance has been kept up on car. Kia wants $10,000 to replace engine.

The contact owns a 2018 Kia Sorento. The contact stated while driving at an undisclosed speed, the contact heard an abnormal knocking sound coming from the engine before the vehicle lost motive power, with the check engine and oil warning lights illuminated. The vehicle was towed to the dealer but was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 115,000.

While driving on the highway, the engine suddenly stopped working without warning. I was unable to accelerate using the gas pedal. Fortunately, the highway was empty at the time, and I managed to safely pull over to the right side of the road. After waiting for approximately 30 minutes for the engine to cool down, I attempted to drive again. However, the car began shaking severely whenever I pressed the gas pedal or attempted to increase the speed beyond 2 RPM. The vehicle was subsequently inspected by a certified Kia service center, where the issue was diagnosed as a failure of the piston ring and cylinder 1, resulting in insufficient compression. The service center confirmed that the vehicle was well-maintained, with no external damage or user-related issues contributing to the failure. No warning lamps, messages, or other symptoms appeared prior to the failure. The engine issue was sudden and unexpected, posing a significant safety risk, especially as it occurred while driving at highway speeds. The vehicle is available for inspection upon request.