Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Kia Sorento owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Kia Sorento. The contact stated that while driving at 55 MPH, the vehicle lost all power while depressing the accelerator pedal without warning. The contact also stated that white smoke began to emit from underneath the hood of the vehicle. Upon inspection of the vehicle, the contact saw flames coming from underneath the vehicle as oil began to leak from the vehicle. The flames eventually dissipated and authorities were not called to the scene. Due to the failure, the vehicle was towed initially to the contact's home and later to the dealer. Once in the dealer's possession, the contact was informed that there was a hole in the engine block which had led to engine failure. The manufacturer was notified of the failure but had yet to offer any assistance. The vehicle remained in the possession of the dealer and had yet to be repaired. …
The contact owns a 2018 Kia Sorento. The contact stated that while accelerating, there was an abnormal knocking sound coming from the vehicle. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the knock sensor needed to be replaced. The vehicle was repaired, but the failure recurred. The mechanic completed a road test and indicated that the vehicle was working as designed. The vehicle was not diagnosed or repaired. The contact stated that while driving at 65 MPH, the vehicle was shuddering, shaking, and then lost motive power and stalled. The check engine warning light was illuminated. The contact used a code reader and retrieved DTC code: P1326 (Permanent go Relay Stuck On). …
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. …
While driving my 2018 Kia Sorento on Interstate 95 at approximately 65 mph, the vehicle suddenly started to knock. The noise got louder and before I could safely pull onto the shoulder, the engine totally failed without any warning lights whatsoever. Large amount of blue smoke came from the exhaust and I lost all power to the vehicle. Engine parts and motor oil were scattered all over the highway from the violent nature of the failure. This also caused vehicles behind me to swerve and brake in order to avoid hitting the metal engine debris. My right rear tire ran over such metal and it immediately went flat. I was able to coast the vehicle onto an exit ramp where I raised the hood to check for fire. The engine continued to leak oil while parked on the off ramp shoulder. …
The contact's daughter owns a 2018 Kia Sorento. The contact stated while driving at an undisclosed speed, there was an abnormal ticking noise detected. The vehicle lost motive power and stalled with the check engine warning light flashing. The vehicle was taken to an independent mechanic who informed the contact that the knock sensor needed to be replaced. The vehicle was towed to the local dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was taken back to the local dealer where it was diagnosed that the transmission and catalytic converter needed to be replaced. The vehicle was repaired; however, the failure recurred. The contact stated that the vehicle failed to shift into park(P). The vehicle was not diagnosed or repaired. …
The contact owns a 2018 Kia Sorento. The contact stated while driving 79 MPH, the oil warning light illuminated, and he observed a burning oil odor emanating from the engine compartment. The vehicle was pulled to the side of the road and inspected. The contact observed condensation under the front of the vehicle and no oil on the dipstick. Additionally, another vehicle pulled to the side of the road and reported that condensation from the vehicle sprayed onto the windshield and hood of their vehicle. The vehicle was towed to a dealer where it was diagnosed and determined that the turbo feed line assembly needed to be replaced due to corrosion and a hole. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.
The contact owns a 2018 Kia Sorento. The contact stated that while driving 50 MPH and depressing the accelerator pedal, the vehicle failed to respond as needed. There was smoke coming from the rear of the vehicle. The contact exited the freeway and waited for AAA to tow the vehicle to the residence. The vehicle was towed to an independent mechanic, and the contact was informed that the oil pan switch needed to be replaced. The oil pan switch was replaced, and the vehicle was repaired. The manufacturer was notified of the failure and asked the contact if the vehicle had regular oil changes. The contact was then informed that there was an oil leak underneath the vehicle. The approximate failure mileage was 118,000.
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.
The contact owns a 2018 Kia Sorento. The contact stated while driving at an undisclosed speed, the check engine warning light remained illuminated. The vehicle was taken to the local dealer who diagnosed that the engine had sustained a loss of compression in cylinder #4, and oil had leaked onto the spark plugs. The contact was advised that the engine was faulty, but no repairs would be made until the engine rods had failed. The manufacturer was notified of the failure and confirmed the instructions provided by the dealer. The failure mileage was 138,500
The contact owns a 2018 Kia Sorento. The contact stated that while driving at an undisclosed speed, the vehicle started shaking and making a rough sound. The vehicle hesitated while accelerating and lost motive power. A piston failed, causing oil to spray out with enough force to damage the catalytic converter. The vehicle was driven to the dealer for an unknown recall repair, but found to have issues with the engine. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 127,000.
NHTSA investigations
Loss of Motive Power
The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021.
Engine complaints in other Sorento years
Frequently asked questions
How common are engine problems on the 2018 Kia Sorento?
NHTSA has 112 complaints about the engine & cooling of the 2018 Kia Sorento, 44% of the model year's 255 complaints. The component named most often is engine › oil/lubrication (1 mentions).
Is there a recall for 2018 Kia Sorento engine problems?
No. NHTSA lists no engine & cooling recall for the 2018 Kia Sorento, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Kia Sorento engine problems start?
Half of the complaints with a recorded mileage happened before about 79,000 miles, and 24% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 7 fires and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.