Diagsheet

2015 Kia Sorento · symptom sheet

Burns oil or oil level rises

  • 30owner reports
  • 100,000median miles
  • 0involved a crash

Newest report Mar 17, 2026 · checked Sep 9, 2026

375 of the 737 complaints on this car are about the engine. 30 of those describe oil consumption.

Tick what matches of 30 reports

3
3
4
13
6

What got replaced

Owners who name the part that was replaced mention the piston rings (12 reports) and the engine (7 reports).

Recalls and investigations

One recall on the engine covers the 2015 model year. A recall on the same system isn't always the same failure, so read the defect text.

18V-907Dec 19, 2018
Fuel System, Gasoline:Delivery:Hoses, Lines/Piping, And Fittings

Kia Motors America (Kia) is recalling certain 2011-2017 Optima, 2012-2017 Sorento and 2011-2018 Sportage vehicles that previously received an engine replacement under recall number 17V-224, warranty, or the Knock Sensor Detection System (KSDS) Product Improvement Campaign. The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak.

Risk and remedy
Risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: Kia has notified owners, and dealers will inspect and replace the fuel pipe, as necessary, free of charge. The recall began January 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC172.

NHTSA investigations into the engine on the Sorento

PE23-019opened Nov 13, 2023
Engine And Engine Cooling · model years 2016 to 2017

Loss of motive power. Closed jul 23, 2024.

NHTSA summary
On November 13, 2023, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE23-019) to investigate allegations of loss of motive power relating to head gasket and/or head bolt failure in Model Year (MY) 2016-2017 Kia Sorento vehicles equipped with the 3.3 L Lambda II engine. When the investigation was opened, ODI had received 13 Vehicle Owner Questionnaires (VOQs) related to reports of loss of motive power. In an information request letter dated November 30, 2023, ODI requested technical information and failure data relating to the alleged defect in the subject MY 2016-2017 Kia Sorento as well as several peer vehicle populations which share the 3.3 L engine. In its February 26, 2024, response to ODI’s information request, Kia provided 2022 customer complaints (including techline and field reports) and 1738 warranty claims representing 2411 unique vehicles within the subject vehicle population. Of the customer complaints provided by Kia, they identified only 53 unique allegations of a loss of motive power resulting from the alleged defect. Kia determined that the remaining reports were minor vehicle drivability or engine performance issues. ODI reviewed the information provided by Kia, along with additional VOQs submitted to NHTSA following the opening of the investigation. When eliminating duplicative reports across the data sources, the total number of allegations of loss of motive power relating to the alleged defect in the subject vehicles is 77, r
DP22-003opened Sep 12, 2022
Engine · model years 2011 to 2021

Loss of motive power. Closed dec 12, 2023.

NHTSA summary
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. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003) to evaluate the Petitioners’ request. The Petitioners have provided additional complaints within four supplemental letters dated January 31, 2023, March 21, 2023, May 23, 2023, and August 4, 2023. ODI’s evaluation included the review and analysis of the complaints and supporting information submitted by the Petitioners, as well as additional complaints submitted directly to NHTSA which referenced either the oil drain plug or a crack in the oil pan. After reviewing the available data, ODI has not identified evidence that would support opening a defect investigation into the oil drain pan as
EA21-003opened Dec 22, 2021
Engine · model years 2011 to 2014

Engine fires. Closed feb 5, 2024, led to recall 23V-877.

NHTSA summary
On March 29, 2019, the Office of Defects Investigation (ODI) opened two Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) to broadly investigate incidents of non-crash fires (regardless of origin or operational status of the vehicle) on various model year Hyundai and Kia vehicles. During the PE investigations, Hyundai and Kia issued several recalls to address vehicle fires, including those due to engine failures involving various engine types. The remedies for the engine failure recalls typically involve engine inspection (to detect existing damage), and if necessary, engine replacement. Additionally, both manufacturers have been installing an engine control software modification known as Knock Sensor Detection Software (KSDS) which is intended to detect impending engine failure, alert the driver, and limit engine power (to lessen likelihood of engine failure).KSDS is being installed under recalls and non-safety field actions, and both companies have extended limited engine warranties (see recall files). On December 22, 2021, ODI upgraded PE19-003 and PE19-004 to this Engineering Analysis (EA21-003, covering both Hyundai and Kia) to evaluate the scope of the prior recalls related to engine failures/fires and the efficacy of the recall remedies for the recalls, as well as the long-term viability of related programs and non-safety field actions being conducted by Hyundai and Kia. The former issue involved approximately 550,000 MY 2013 Hyundai Elantra, MY
DP21-002opened Nov 12, 2021
Engine And Engine Cooling · model years 2015 to 2017

Engine oil pressure switch leak. Closed jun 26, 2023.

NHTSA summary
In a letter dated September 30, 2021, Mr. Gerald James (the petitioner) requested that NHTSA conduct an investigation of the Model Year (MY) 2015-2017 Kia Sorento equipped with 3.3L V6 ?Lambda? engines for ?severe oil leaks? from the oil pressure switch (OPS) that could ?lead to engine failure? with little warning to the driver. Mr. James based this request on his own experience and data found in NHTSA?s Vehicle Owner Questionnaire (VOQ) database. NHTSA reviewed the material cited by the petitioner, information submitted by Kia, NHTSA?s testing, and other pertinent information in NHTSA databases.On November 12, 2021, ODI opened Defect Petition DP21-002 to evaluate the petitioner?s request. ODI performed an analysis that included evaluation of the petitioner?s vehicle, searches of ODI complaints from vehicle owners, non-dealer field reports, manufacturers? supplemental information relating to design of the component, and component testing performed by ODI.On December 16, 2021, ODI and Kia North America performed a joint inspection on the petitioner?s vehicle. ODI and Kia agreed the OPS was leaking oil and observed oil in the crevices atop the engine block. The vehicle received a new replacement OPS and was delivered back to the petitioner. The original part that was removed from the subject vehicle was retained by ODI for further analysis.As of December 30, 2022, for the MY 2015-2017 Kia Sorento population of 161,519 vehicles with 3.3L engine, NHTSA reviewed internal data and
RQ17-003opened May 18, 2017
Engine · model years 2012 to 2014

Scope and timeliness. Closed dec 22, 2021, led to recall 17V-224.

NHTSA summary
NHTSA opened Recall Query (RQ) 17-003 to investigate the timeliness and scope of Kia?s Theta II GDI engine recall (Recall No. 17V-224), and Kia?s compliance with reporting requirements. On November 23, 2020, the Agency entered into a Consent Order with Kia to administratively resolve NHTSA?s assertions of violations of law in connection with RQ17-003. NHTSA?s assertions included that Kia may be liable for civil penalties on multiple grounds, including that Recall No. 17V-224 was untimely and Kia?s recall report contained certain inaccuracies.Under the Consent Order, Kia agreed to a total civil penalty of $70,000,000. The total civil penalty included a payment of $27,000,000 as a Non-Deferred Amount.Kia also agreed to a sum of $27,000,000 as an Abeyance Amount to be deferred and held in abeyance pending its satisfactory completion, as reasonably determined by NHTSA, of the requirements of the Consent Order.Kia also agreed to a $16,000,000 Performance Obligation Amount to be expended by Kia to fulfill specified Safety Data Analytics Infrastructure obligations. The Consent Order also includes other terms designed to enhance Kia?s safety practices, and requires Kia to retain a Third-Party Auditor who directly reports to NHTSA.Other than RQ17-003, the Consent Order is not intended to affect any other current or future investigation of NHTSA which may involve vehicles equipped with Theta II GDI engines. In particular, Engineering Analysis (EA) 21-003 (which is upgraded from Prelimi
PE10-023opened Jul 12, 2010
Fuel system · model years 2003

Fuel spill during refueling. Closed dec 21, 2011.

NHTSA summary
Complaints allege that while refueling the vehicle, fuel can spill out or spit back from the fuel filler port on model year (MY) 2003 Kia Sorento vehicles (subject vehicles).Consumers report that the spilled fuel can splash on the person fueling the vehicle, or on the side of the vehicle and the ground.The subject vehicles are equipped with an evaporative emissions control system that, among other things, manages air exchange between the fuel tank and the atmosphere in an environmentally safe manner.The system consists of a vapor canister, various control valves and tubing, and a canister filter (fuel tank air filter) through which the air that flows in and out of the fuel tank must pass.Kia's testing found that if the canister filter becomes significantly clogged, excess pressure can build up in the fuel tank and cause fuel to spit back from the filler port during refueling.Kia has stated that the canister filter requires regularly scheduled service maintenance; however, the component is not listed as a maintenance item in the owner's or service manual for the subject vehicles.ODI notes that Kia does list the filter on the maintenance schedule in the owner's manual for MY 2005 and newer Kia Sorento vehicles.To address the issue of fuel spit back during refueling, Kia will conduct a service campaign of approximately 86,000 MY 2003 and 2004 Kia Sorento vehicles.The campaign will provide a one-time replacement of the canister filter, at no cost to the owner.Kia will begin notif

When it happens

The middle half of failures fell between 75,000 and 117,000 miles, from the 19 reports that gave a mileage.

216
318
319
220
121
622
423
224
525
226

What owners wrote

“Faulty motor I have changed oil early every time and every mechanic I’ve been to said the Kia motor is always doing this ! I still owe 9k on this car! It’s burning oil so fast and not going into the engine this is a on going issue with these motors ! I just now hit 100 k miles no reason for my motor to be blowing please put the recall back on for the 2015 Kia’s!!!”

Filed Oct 12, 2025

“UNKNOWN. My engine light comes on often. When I had my oil changed the professional indicated that my car is burning oil. When reviewing online, it appears that this is a common issue for Kia Sorento and specifically the engine that is installed in my 2015.”

Filed Mar 12, 2025

“Coolant and oil are mixing. Coolant was over flowing from the reservoir. High oil consumption. Oil was just topped off about 1000 miles ago and is very low on the dipstick now. Coolant mixing with oil seems like the issue the 2016-17 3.3 V6s are experiencing with the stripped head bolts. HEAD GASKET/ENGINE FAILURE is imminent. Extend the warranty to all 3.3 liters not just 2016 and 2017 (15 years/180,000).”

Filed Jan 22, 2025 · 1,000 miles

“I don’t know why, but I keep losing oil somewhere. I do my oil changes on time regularly and they said it’s burning oil fast and that that’s an issue with all Kia.”

Filed Jan 10, 2025

Should you keep driving it?

This page can't tell you that. 0 of 30 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.

Other problems on this car