2018 Kia Sorento engine problems

Filed Oct 6, 2026 · Engine · TX

My 2018 Sorento is consuming oil excessively. I’m having to add oil between changes, and I’m now experiencing reduced acceleration under load. I have been told by a few different parties that this has become a common problem with Kia’s. I want an oil-consumption test performed and I want the VIN checked for all engine campaigns, warranty extensions, KSDS coverage, and open recalls

Filed Sep 18, 2026 · Engine · NC

Complete engine failure inspected by Westgate Kia Service Dept, Wake Forest, NC Service manager confirmed that known issue and recall in effect for 2018 Kia Sorrento same issue but because manufactures parts are only covered when made in certain locations. mine not covered. He did agree it was exact same issue but declined to assist. Warning sign / flashing check engine light.

Filed Sep 15, 2026 · Electrical, Engine · CA

Vehicle: 2018 Kia Sorento VIN: [XXX] Kia Corporate Case #: XXX My 2018 Kia Sorento experienced a catastrophic engine failure (“holes in the block”) while under warranty. The vehicle lost power, emitted heavy smoke, and became completely inoperable. Kia America has refused to repair the engine and has delayed providing the required written denial for my warranty claim. This vehicle has also suffered five break-ins, and Kia has two active recalls for my year and model that were never performed, including a theft‑prevention recall. My vehicle is part of a nationwide class‑action lawsuit involving engine defects and theft vulnerabilities. Because Kia America delayed resolving my warranty case, the vehicle has been sitting at Kia Vacaville accumulating predatory storage fees. The dealership is now threatening a mechanic’s/storage lien sale, which would destroy the vehicle and eliminate evidence of the manufacturer defect. I cannot afford any repair costs, storage fees, or loan payments for a vehicle that failed due to manufacturer defects. I am requesting the federal safety agency’s investigation into Kia’s handling of engine failures, recall compliance, and the dealership’s attempt to sell a vehicle that is part of an active defect case. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 20, 2026 · Engine · 118,000 miles · CA

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.

Filed Aug 20, 2026 · Engine · TX

I am a working parent filing a formal complaint against Kia America and Classic kia of Carrollton for non-compliance with the Theta II Class Action Settlement mandates. My vehicle experienced a qualifying engine failure and is currently held at the dealership. The dealership is actively refusing to provide a mandatory free loaner vehicle and is delaying the 5-minute diagnostic scan. Kia Corporate is refusing to authorize an alternative direct-bill rental line without the scan. This corporate bottleneck has left a working parent and a school-aged child completely stranded, threatening my employment. The manufacturer is violating a court-ordered settlement. I am in need of a vehicle and its unacceptable to expect me to pay out of pocket which I cannot afford, for a defect caused by the manufacture, not the customer.

Filed Jul 5, 2026 · Brakes, Engine · IN · fire

My wife and I were Driving when I tried to stop and the brakes failed. Within seconds the vehicle caught fire in the engine compartment. I had to slam the transmission into park cause the doors would not open. When my wife tried to escape out the passenger side the flames came into the cabin towards her. I then opened my door and then had to help my wife escape out the driver's side door. Within minutes the car was engulfed in flames. The fire department arrived and it took a while to extinguish. The vehicle is totaled.

Filed Jun 5, 2026 · Brakes, Electrical · CA

I had the car for just 2 years and it's giving me a lot of problems the car smells like gas it has a gas leak the breaks don't work and the electrical system don't work properly

Filed May 5, 2026 · Engine · NC

2018 Kia Sorento, under 88,000 miles, with Theta II engine defect. KSDS update installed. Oil consumption issues requiring adding at least one liter of oil every 1,000 miles in between regular oil changes/ maintenance. Oil warning lamp does not illuminate at all or only blinks on for a second then stays off, even when oil is less than 1 liter. Noticed slight jerking/hesitation at acceleration for a few days, then experienced shaking and heard vibrations when breaking and idling. Within a few minutes, MIL appeared with audible warning, "Take this vehicle to a Kia dealership." Immediately parked car. Towed to Kia dealership. No record of DTC P1326 found, which would have qualified vehicle for new engine under PI1802 Y/Z Theta II Extended Warranty. Diagnostic found misfiring cylinder and fouled spark plug. Technician in the video stated "oil consumption." Due to absence of P1326 code, service manager suggests we replace fouled plug and return with the vehicle when the same issue happens again. This does not follow Kia's own guidelines in PI1802 Y/Z campaign for a couple of reasons. First, activation of the MIL in conjunction with the audio warning indicates the Knock Sensor P1326 code should have been generated and stored, but the warning system must have malfunctioned. Service dept. did not to inspect the knock sensor harness for damage or oil saturation which could have kept the code from registering. Second, Service dept. did not consider shaking and vibration as "engine noise," which would have required them to perform a BCT or test for connecting rod bearing noise, providing a pathway to request Techline PWA approve replacing the engine under warranty. Kia's Product Improvement Campaign for Theta II engines ought to prevent injury or death resulting from catastrophic engine failure. My vehicle presents clear evidence of engine failure progression at different stages. Rather than navigate the warranty via a Techline, Kia has advised me to continue driving.

Filed Apr 11, 2026 · Engine · TX

My 2018 Kia Sorento has developed excessive oil consumption consistent with the known engine defects affecting Kia’s Theta II engines. The vehicle began consuming oil rapidly without warning, despite regular maintenance. This issue did not appear until after 100,000 miles, which is common for this defect. The sudden loss of oil creates a serious safety hazard, including engine stalling or failure while driving. Kia dealerships have acknowledged the symptoms but stated that because my vehicle is outside the warranty, I must pay for the oil consumption test and would be responsible for the full cost of an engine replacement. Kia has issued multiple Technical Service Bulletins related to excessive oil consumption in these engines, and many owners have experienced the same problem. This is a manufacturer‑related defect that develops over time and poses a safety risk to drivers and passengers.

Filed Mar 27, 2026 · Engine · NY

My car for the last 2 years has had multiple malfunctions with misfiring and replacement of head gaskets, pistons and more. Not to mention consistence oil concerns. On two occasions my family and I had to have the vehicle towed home over 200 miles because the car was not driving well. I have a [XXX] ghter who was with us at the time. The only warning lamp that ever triggered was the check engine. In October is when I was informed about a recall that was on my vehicle from KIA the corporation and I was told to have it towed to Kia in [XX [XXX] ey would replace my engine if the rod barring failed; and it did. Kia refused to pay for the engine and reported that I was misinformed. In December of 2025 I went through the Attorney General for mitigation to try and fix the engine- However, Kia reported because the engine manufacturer recall was not updated prior to October 30th or 2020 it was considered failure on the consumers part for not updating their address. However, I have documentation that the vehicle was sign for by myself on December 2nd of 2020. I have the car fax reporting that the car was surrendered by the previous owner on October 28th, 2020. Therefore, I was not the own when this manufacturer warrantee recall was in place or when it expired. So, I do not feel since i did not own the car when this was to be completed, that I should be responsible. Not to mention I am paying on the loan that financed this vehicle for the last 7 months while it has sat at KIA in [XXX] [XXX] ION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)