2017 KIA Sportage engine problems

ENGINE

Engine burns excess oil, I am forced to add oil every other day as it consumes an excessive amount. When I spoke with the Kia Dealership they told me I have an unlimited warranty on the engine but it need to blow before they will replace it. I’m spending a fortune on oil.

NHTSA complaint #11752117 — an unverified report by a vehicle owner.

ENGINE

My car went into limp mode on the high way due to a faulty knock sensor. my car decelerated rapidly, which could have put me and others around me at risk. I had to repair this problem on my own even though other cars similar to my make and model have had the same issue.

NHTSA complaint #11751195 — an unverified report by a vehicle owner.

ENGINE

The engine consumes a massive amount of oil to where I have to check my oil constantly and refill as often as weekly. This can pose a risk to myself and others due to the engine failing while I am driving. I am sure other issues can come from an engine running out of soil that I’m not aware of.

NHTSA complaint #11751196 — an unverified report by a vehicle owner.

ENGINE

One day as I was turning at a green light the car completely stopped on me. I had to turn it off and then restart it and it worked fine. About a week later I had to drive to my cousin's house 45 minutes away and the car would not go, it acted like it was stalling and It didn't want to go over 2000RPMs and it was really sluggish like it didn't want to shift into the next gear. I finally got on the highway and it would not go past 60 miles an hour and then also if you try to drive it, it will slow down like its shutting off on you. I've had a new battery replaced, 4 new tires a windshield, and wipers replaced. I took the car to AutoZone and also to another guy and both of them used their computers and said that it's the engine and they called it rod knocking. I called customer service and they said yes their is a recall and that they would replace the engine. I tried to call kia in mesquite Texas because that is the closest one to me and I left a voicemail they did not call me back I am carless I'm a single disabled mother I need a working car.

NHTSA complaint #11749087 — an unverified report by a vehicle owner.

ENGINE

After fueling, vehicle idled fine with no warning lights. Once pulling onto the highway and making highway speeds, the vehicle suddenly lost acceleration, and was stranded in the highway. We required the assistance of law enforcement to direct traffic. It was 10pm and the temperatures were 35 degree below zero with the windchill. The vehicle was towed to a Kia dealership, where they diagnosed loss of compression in the pistons. The dealership stated the engine had been burning/consuming oil and that the burnt valve caused the loss of compression and sudden breakdown. This vehicle uses the 2.4L Theta II GDI engine, which has a long history of engine failures, oil consumption complaints, stalling, and class-action litigation involving sudden engine failure and loss of power. Kia denied coverage by claiming only rod-bearing failures qualify for warranty extension, even though excessive oil consumption and compression loss appear closely related to the same broader engine defect pattern. Other owners have also reported 2017 Sportage excessive oil consumption leading to compression loss and engine failure. I believe this is a serious safety defect because the engine can fail suddenly while driving at highway speed, drivers may have little warning before loss of power, oil consumption may not trigger adequate warning before catastrophic failure. This creates crash risk, roadside hazard exposure, and potential fire risk.

NHTSA complaint #11748466 — an unverified report by a vehicle owner.

ENGINE

While driving on the interstate at highway speed with cruise control engaged, the engine suffered sudden catastrophic failure with absolutely no prior warning, warning lights, knocking, stalling, or other symptoms. The vehicle became inoperable immediately. The repair estimate is $6,500 for engine replacement. The vehicle is a 2017 Kia Sportage equipped with a Theta II 2.4L GDI engine, confirmed by service campaign SC340 on file with NHTSA. Two safety recalls remain incomplete on this vehicle: 21V137 and 22V703. The Knock Sensor Detection System software update campaign SC340 was never completed prior to my purchase of the vehicle in February 2024 from a used car dealer, despite being issued in July 2018. Kia Consumer Affairs indicated the claim would likely be denied due to the incomplete KSDS update, despite that update predating my ownership entirely. A dealer appointment had been scheduled for June 26, 2024 to address outstanding recalls prior to this failure occurring.

NHTSA complaint #11744422 — an unverified report by a vehicle owner.

ENGINE

My 2017 Kia Sportage has experienced excessive oil consumption, cylinder #3 misfires, loss of power, and highway stalling events. The dealership initially documented engine damage and indicated findings consistent with internal engine failure, including concerns related to metal contamination and cylinder damage. These issues appear consistent with numerous complaints from other Kia owners involving the same engine family. Kia has since backtracked on prior findings, and both Kia and the dealership have stopped responding to my requests for clarification and documentation. The cylinder damage and related engine failures appear to be symptoms of a larger engine defect that poses a safety risk due to sudden loss of power and stalling while driving. I request that NHTSA investigate these recurring engine failures and Kia’s handling of these claims.

NHTSA complaint #11744503 — an unverified report by a vehicle owner.

ENGINE

What component or system failed or malfunctioned, and is it available for inspection upon request? Engine is malfunctioning, increase in oil consumption, MPG dropping, a ticking/knocking noise coming from the engine, and erratic engine behavior with random surges while driving to 6000+ RPM. Brought it into Kia 2x now for same issue and first time said nothing was wrong and second time I am now going through an oil consumption test. Vehicle is still unsafe to drive but they say this is the only option to do their test to move forward with my warranty with Kia. I am driving through mountain passes daily with this behavior and I worry if the engine blows I'll lose control of the vehicle and fall off the cliff. How was your safety or the safety of others put at risk? I am instructed to drive it still. Has the problem been reproduced or confirmed by a dealer or independent service center? The engine oil consumption test is happening now, I have driven 500 miles and the engine oil is low, pending to hear back from Kia on when they can get it in for next steps. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No, just a Kia dealership (if that is the manufacturer then yes) Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No. And there is no warning lights for low engine oil. I have driven many times without oil and no warning that the oil was even low. The vehicle burns up oil fast.

NHTSA complaint #11739625 — an unverified report by a vehicle owner.

ENGINE

I experienced engine failure and the dealership, corporation and warranty are refusing to replace the engine. My engine falls under an engine settlement. The denial states the corporation will not approve because i do not have a system update. The system update was issued while in the dealer’s inventory, part of the Certified Pre Owned inspection, it is required that the dealer updates all recalls & product improvements before certification.

NHTSA complaint #11738633 — an unverified report by a vehicle owner.

ENGINE

My safety is put at risk. My car has stalled two different times on the highway. I was able to get it off the road after restarting the vehicle and coasting out. The engine was worked out by Kia of Mission Viejo. They stated it was not due to Rod bearing, although I was told on a separate occasion that there was metal in my oil in the same scenario then when they submitted the video to Kia, they said they only saw the burnt valve my check engine light has went on a total of three times I’ve had the same exact work done three additional times as well as the knock sensor having to be replaced because it went off and burned out due to what happened on the highway. My car is part of the theta engine issue with Kia

NHTSA complaint #11736363 — an unverified report by a vehicle owner.

ENGINE

I am reporting a dangerous engine failure involving sudden loss of power and complete engine shutdown. While traveling uphill on I-90 in Massachusetts, my 2017 Kia Sportage suddenly lost engine power and rapidly became unable to maintain speed. I first moved into the right lane due to the power loss, but then had to cross traffic at approximately 20 mph to reach a small emergency shoulder area on the left side of the highway, where the vehicle completely died. This created a serious highway safety hazard for me and other drivers. We were stranded in a highly dangerous location and required assistance from multiple Massachusetts State Troopers due to the unsafe roadside conditions. The vehicle was towed to a Kia dealership, where they diagnosed: spark plugs covered in oil, multiple cylinder misfires, compression loss in cylinder 3, burnt valve causing failure likely worn valve seals causing oil consumption. The dealership stated the engine had been burning/consuming oil and that the burnt valve caused the loss of compression and sudden breakdown. This vehicle uses the 2.4L Theta II GDI engine, which has a long history of engine failures, oil consumption complaints, stalling, and class-action litigation involving sudden engine failure and loss of power. Kia denied coverage by claiming only rod-bearing failures qualify for warranty extension, even though excessive oil consumption and compression loss appear closely related to the same broader engine defect pattern. Other owners have also reported 2017 Sportage excessive oil consumption leading to compression loss and engine failure. I believe this is a serious safety defect because the engine can fail suddenly while driving at highway speed, drivers may have little warning before loss of power, oil consumption may not trigger adequate warning before catastrophic failure. This creates crash risk, roadside hazard exposure, and potential fire risk.

NHTSA complaint #11733898 — an unverified report by a vehicle owner.

ENGINE

The contact’s mother owns a 2017 Kia Sportage. While the contact's mother was driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact's mother noticed an abnormal odor and an abnormal ticking sound coming from the vehicle. Additionally, the check engine warning light was illuminated. The vehicle was taken to the Auto Zone and connected to a diagnostic machine, and DTC: P0128, P1326, and P0014 were retrieved. The contact's mother received notification of NHTSA Campaign Number: 22V703000 (Trailer Hitches). The contact was unsure if the failure was associated with the unrepaired recall. The manufacturer was not made aware of the failure. The failure mileage was approximately 141,000.

NHTSA complaint #11733282 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2017 Kia Sportage. The contact stated that while driving on the highway at approximately 60 MPH, the vehicle suddenly shut off and stalled. No warning light was illuminated. The vehicle was taken to an independent mechanic, where the battery was replaced; however, the failure persisted. The independent mechanic diagnosed the vehicle and found metal shavings inside the oil filter. The manufacturer was not notified of the failure. The failure mileage was 143,111.

NHTSA complaint #11733117 — an unverified report by a vehicle owner.

ENGINE

I own a 2017 Kia Sportage 2.4L (VIN: [XXX] ). In October of 2024 , the vehicle began making a loud engine knocking noise consistent with a known rod bearing failure. I immediately stopped driving and it has been in my garage to prevent further damage or safety risk. I contacted KIA America corporate twice 4/17/26 and was denied engine replacement twice. Kia stated I was not eligible for coverage under the engine defect settlement?KSDS update requirements. We are the second owner of the car having purchased it in 2020. I never received the letter about the knock sensor update. I did receive a recall in Dec 2026 a tow hitch harness and another in March 2026 for voluntary emissions campaign. I asked why I did not receive notification they said they most likely sent it to original owner they would not CK if received and then said the NHTSA sends those out and to contact you which is not the case they send them out. I have a 2.4L engine consistent with the defect causing sudden engine failure, fires and hazardous driving conditions. I was denied being able to file a report for not having the software update for the engine knocking (I never received) and for not services it with a KIA dealship I maintained my vehicle and have my documents. Thank you for your time in this frustrating matter. [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11732483 — an unverified report by a vehicle owner.

ENGINE

Car has 84000 miles on it for last 15-20 thousand miles there is a smell of gas in the oil. I took to dealership they charged me to replace a catalytic converter. Not even a year later the cars engine blew up. Now needs a whole new motor there is loud knocking and car will not accelerate.

NHTSA complaint #11728780 — an unverified report by a vehicle owner.

ENGINE

Car started making noise, slowed down. I stopped the vehicle immediately and parked on shoulder. Towed it to a mechanic shop and they said the engine stopped. It needs an engine replacement.

NHTSA complaint #11724424 — an unverified report by a vehicle owner.

ENGINE

My 2017 Kia Sportage with approximately 98,000 miles suddenly started using oil at times. It would go for several trips with everything fine and then it would be a quart low. I continued to drive it and check the oil before every trip. At approximately 106,000 miles, I suddenly lost engine power, a small puff of black smoke from the exhaust, and the check engine light came on. I crippled it home after checking all fluids - they were fine. I trailered the car to my mechanic and after diagnosing it, he stated the #1 cylinder had no compression. I brought it home and checked online to find out that this seemed to be a common occurrence with the Sportage. To double check, I took the car to a second mechanic to get the same results except he provided more detail. Compression on #1 Cylinder 0, #2 was 140, #3 145, #4 140. He stated the compression should be above 175. My safety issue was I could have been stranded on I49 and if this had happened at night, I may not have been able to get it home. I took the vehicle to Crain Kia, Fayetteville, AR. when the first Check Engine Light came on and they stated it was shown as low engine oil even though it had oil in the engine and that it showed low compression on Cylinder 4. I now have a vehicle with 106,048 miles that without major engine repairs is worthless to me.

NHTSA complaint #11723985 — an unverified report by a vehicle owner.

ENGINE

The Catalytic Converter in the Kia. We were driving to Texas to take my kids out for mini vacation and it’s cut off right in the middle of the highway. My car was running just fine everything was fix properly. Can you check in the Catalytic Converter and see if it safely issue.

NHTSA complaint #11720579 — an unverified report by a vehicle owner.

ENGINE

The vehicle has had recurring drivability problems since at least June 2024, including repeated check engine light illumination and severe loss of acceleration. On 06/19/2024, dealership service records document that the check engine light was on and the vehicle would not accelerate past 40 mph, and the check engine light was flashing. More recently, while driving on the interstate at highway speed, the vehicle suddenly lost power and dropped speed, forcing me to pull over on the side of the road for safety. This created a dangerous situation and risk of collision. The problem continues despite multiple service visits. A dealership service visit on 06/05/2025 documents stored diagnostic trouble code P0420 (Catalyst System Efficiency Below Threshold), but the dealership stated no further repairs were recommended and no repair was performed. This issue is recurring and creates a serious safety hazard due to sudden loss of power while driving. Vehicle: 2017 Kia Sportage VIN: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11720092 — an unverified report by a vehicle owner.

ENGINE

Kia Sportage has had serious oil consumption issues for 3 years. And recently is loosing pressure in cylinder 2 as a result of excessive carbon build up on valves and head from oil burning in the combustion chamber.

NHTSA complaint #11716123 — an unverified report by a vehicle owner.

ENGINE

"I am reporting a catastrophic engine failure (rod knock/bearing failure) in my 2017 Kia Sportage, consistent with the Theta II GDI defect. The failure caused a sudden loss of motive power while in traffic, creating a significant safety risk. Furthermore, I am reporting Bill Dodge Kia (Westbrook, ME) for safety negligence. On September 26, 2023 (at 83,611 miles), this vehicle was in their service bay for brake work. Despite the vehicle being under an active HECU Fire Risk Recall (SC206) and requiring the KSDS Product Improvement Campaign, the dealership failed to perform these safety updates or disclose them to me. When confronted, dealership management (Alex Pinto, Bob Colton, and Patrick Demers) explicitly stated it was 'not their responsibility' to inform customers of known defects or active recalls. This practice left me driving a vehicle with a known fire risk and a documented engine defect for over two years without my knowledge, ultimately leading to the current engine failure."

NHTSA complaint #11714822 — an unverified report by a vehicle owner.

ENGINE

On 1/10 about 1.5 hour driving out of town later engine started idling low. Pulled over, replaced spark plugs and engine coil and still idling rough. Took vehicle for diagnostics of a broken head in the valve. I drive a 2.4L engine 2017 Kia Sportage LX AWD. only 114K miles. Quoted thousands and thousands, more than care worth to repair.

NHTSA complaint #11710643 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

See attached document for complaint.

NHTSA complaint #11708816 — an unverified report by a vehicle owner.

ENGINE

On 11/21/2025, while operating my vehicle, I experienced a critical engine failure. The engine failed a compression test, with readings as follows: Cylinder 1: 125 PSI Cylinder 2: 60 PSI Cylinder 3: 25 PSI Cylinder 4: 3 PSI As a result, the engine had no compression in multiple cylinders, preventing the vehicle from starting. The vehicle exhibited [smoke, stalling, or other observable symptoms]. This failure appears consistent with known issues in the Theta 2 GDI engines, including risk of engine failure or fire. I had not received notification of any required software updates or recalls relevant to this issue. Despite multiple attempts to resolve this with the dealer, including [dates of service attempts], the dealer refused to cover a replacement engine under warranty. Impact on Safety: The sudden engine failure rendered the vehicle inoperable and posed a significant safety risk due to the potential for stalling or fire while driving. Additional Notes: I am submitting this report to request that the NHTSA investigate this potential safety defect.

NHTSA complaint #11706505 — an unverified report by a vehicle owner.

ENGINE

On November 2, while driving my 10-year-old son to a soccer game, the vehicle suffered a sudden loss of power at road speed. The vehicle's failure to provide a "limp-home mode" or any sensor warnings prior to stalling created a significant life-safety risk for my son and me as we had to coast across traffic to a safe location where the car stalled. •No Warning Indicators: There were no prior "Check Engine" lights, oil pressure warnings, or temperature fluctuations. •Hazardous Failure Mode: The vehicle stalled completely in active traffic. I was forced to perform an emergency maneuver, coasting across lanes of traffic to reach a safe shoulder. •Outcome: The vehicle was towed to Ourisman Kia of Bethesda, where service technicians diagnosed "severe internal engine failure."

NHTSA complaint #11706150 — an unverified report by a vehicle owner.

ENGINE

October 2, 2025 no oil in engine. car has always had regular oil maintenance. Dealer put almost four quarts of oil in car to start an Oil Consumption Test of 1,000 miles. November 22, 2025 driving about 70 miles an hour, on the 241 Toll Road car loses powder, speed dropped to about 20 miles an hour. I was able to make it to the highway shoulder where the engine struggled to stay running. I cut the engine off and it would not start again. Had to be towed to Covina Kia. Still had over three hundred miles before the 1,000 mile test. Last oil change July 9, 2025 at Covina Kia. I bought my 2017 Kia Sportage in October 2016 brand new. I'm the only one to drive it. I have always taken it back to dealer for servicing. All my oil changes were done with the dealer and on time. I understand there is a class action lawsuit against kia for oil starvation and engines seizing, (theta II sc147). All indications suggests my engine also suffered the same manufacturer defect as claimed in the lawsuit. AND I WANT TO BE COMPENSATED KIA Manufacturer is aware of there engine problems and should be more proactive, before someone is killed

NHTSA complaint #11701544 — an unverified report by a vehicle owner.