2017 Kia Sportage: sudden loss of power

Filed Sep 25, 2026 · Acceleration, Engine · TX

While traveling at highway speeds on the freeway, the engine experienced a sudden, catastrophic failure, causing the vehicle to lose power and violently force itself into an emergency low-speed "limp mode." This created an immediate, severe collision hazard with surrounding high-speed traffic. The vehicle is a 2017 Kia Sportage with a 2.4L Theta II engine, which had previously received the mandated KSDS safety software flash. The authorized dealership (Southwest Kia) refused to honor the safety recall and lifetime warranty parameters for this engine failure, instead classifying the issue as a "burnt valve" to deny coverage and forcing an out-of-pocket retail customer charge of $6,864.49 for a full engine assembly replacement.

Filed Jul 6, 2026 · Engine, Fuel system · MN

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.

Filed Jun 16, 2026 · Engine · CA

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 the federal safety agency investigate these recurring engine failures and Kia’s handling of these claims.

Filed Apr 26, 2026 · Engine · MD

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.

Filed Apr 10, 2026 · Brakes · OK

Component Failure: Independent inspection confirmed a broken brake master cylinder mounting bracket and a missing AC compressor mounting bolt. Safety Risk: The broken brake bracket compromises the structural integrity of the braking system, posing a risk of brake failure while driving. The missing AC bolt creates a risk of the compressor becoming unseated, which could damage the serpentine belt and cause a sudden loss of power steering or engine cooling. Dealer Interaction: The selling dealer (Orr Nissan West) advertised the vehicle as "vetted" but has since ignored multiple formal requests for the pre-sale inspection records after these defects were discovered.

Filed Mar 12, 2026 · Engine · AR

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.

Filed Feb 24, 2026 · Engine, Transmission · IN

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)

Filed Dec 19, 2025 · Engine · MD

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."

Filed Nov 25, 2025 · Engine · KY

My wife was driving home from work on 10-15-2025 when the car started to lose power and started shaking, vibrating really bad. She got off the exit and at the red light and it died. She called me crying and scared. She started the car back up to try to get the car home and she said the car is vibrating and shaking really bad and I’m so scared and it died again in traffic. I told her to pull over and I would come get her and she did make it home. I look at the car and found it had a misfire on cylinder 2. Cylinder 2 had NO COMPRESSION. I did take it to Kia and they confirmed the diagnosis. Here is where the problem lies. The technician that scanned my car purposely miss diagnosed it. He wrote it only had burnt valves and cylinder. He never said anything about the hole in my piston. He took a picture of it and it has a hole on top. He said the car was drivable; are you kidding me. When you start the car the voice comes over the speakers and says the computer has detected a major engine problem. My cars vin # confirms that it qualifies for the class actions settlement because of the engine that is in the car. They are known to fail because of excessive oil use, starvation of oil, bad piston rings, bad rod bearings. We have been without her car since this happened. Kia said the car was drivable and I can promise you it is not. This car is not safe at all to drive. It loss all power in traffic and it kept dying.

Filed Oct 27, 2025 · Electrical, Engine · NC

2017 Kia Sportage while driving on the highway, the vehical starting losing power and shaking, it lost power and several unknown warning lights illuminated. The vehicle was towed to an independent mechanic, where it was diagnosed with engine failure and the engine needed to be replaced. The vehicle was not repaired. The vehicle was towed to the dealer, where the same diagnostic test information was provided. The Kia dealer said that the engine needed to be replaced, but since it was not the rod, but only the #4 cylinder it would not be under the extended warranty. The vehicle has not been repaired. The manufacturer was made aware of the failure and we were denied extended coverage. In addition to this, the electrical system has been failing and the windows would not roll up, this was fixed before the engine failure, but the drivers side door still does not unlock without the key. The failure mileage was approximately 112,000.

Filed Oct 20, 2025 · Engine · MN

Car started having issues with retaining oil and was blowing oil out of the oil fil cap, oil changes were being performed every 3 weeks due to continued oil loss without cause. Car started shaking while driving on the highway, check engine light started flashing and car lost all power. Car was towed from highway to KIA authorized dealer where they performed a full engine replacement, replaced serpentine belt, oil filter and air filters. Picked up vehicle from dealership approx. 2 weeks later, engine was still blowing oil out of oil fill cap and entire vehicle smelled like used oil. Dealership also refilled engine with wrong type of oil upon replacement of engine. Car requires 5W-20, dealership put in 5W-30 instead of correct oil.

Filed Apr 13, 2025 · Engine · GA

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The engine failed while driving ([XXX])—specifically, the engine seized and became inoperable while driving on the interstate. Yes, the engine is still available for inspection upon request. (Currently at the dealership - due to overheating while driving (after engine had been replaced on 3/26/2025) 2. How was your safety or the safety of others put at risk? On [XXX], the engine failure occurred while the vehicle was in motion, causing a sudden loss of power and steering assist. This placed me and other drivers at serious risk, especially since it happened on the interstate and I was unable to maneuver or accelerate safely. On [XXX], the engine overheated in severe, bumper to bumper traffic. The owner’s safety was put at risk due to the high volume of traffic and little options to pull over. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the engine failure has been confirmed by both an independent mechanic and a Kia dealership. They diagnosed the engine as seized and non-repairable without a full engine replacement. Engine was replaced by Kia on March 26-28, 2025 and returned to the owner on March 28,2025. At the dealership's recommendation the owner replaced all the hoses and belts. Owner was assured all fluids had been refilled and engine repair was complete. Engine overheated while driving in Atlanta on [XXX]. Vehicle was towed back to the dealership due to the overheating and the noises coming from the engine compartment while running. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? So far, the engine has been inspected by the Kia dealership's service department and the engine was replaced on March 26-28,2025 To my knowledge, the manufacturer has not inspected the vehicle. All inspections were performed by th INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5