While traveling on the highway at the stated rate of speed between 65-75 mph, my vehicle experienced what I described as a downward surge causing the vehicle to suddenly lose speed immediately followed by a consistent blinking engine light. Fortunately, I was in the slow lane and there wasn't a vehicle behind me, or I could have been rear ended. I tried to accelerate; however, the engine acted as if it was choking. I backed off acceleration and allowed the engine to pick up speed on its own. Fortunately, I was almost home and stopped by the Auto Zone in my neighborhood and they attached the device that will generate the code. The code generated P1326 which points toward the knock sensor. KIA need to address this issue and be made to correct these dangerous issues before someone is in a major accident where they may find themselves in a lot of traffic. In my research, I have found numerous complaints regarding this issue and consumers not receiving restitution or taking 3-4 months waiting for their vehicle to be repaired. We hope you will be able to assist in getting KIA to review these motor issues. Thank you for your time and consideration.

- East Point, GA, USA

June 29th I was driving home and car suddenly went into limp mode. Had this car less than 2 yrs. I'm the second owner so I don't have 100,000 engine warranty. Its at 91 000 miles. Gets maintained regularly. But the cart consumes a lot of oil and after I google and read all about P1326, i find out there is a campaign by kia fixing these engines. Unfortunately my make and model, even tho same engines didn't make the cut. From the list of complaints from people online seems to me that there will be more legal action taken. These are the same crappy engines. I will never nor let anybody I know by a Kia/Hayandai ever again, if I can help it.

- Tracy, CA, USA

Leased this Kia by force from rightway auto here in Indianapolis in. Had for about 1 1/2. First notice after filling up my tank gas was depleted within 3 days on driving 12 miles to and from work in town. Then oil start disappearing a week after oil changes..around Jan 8,2024. Check engine light start flashing driving the highway to work. Speed jumped down to 45. Engine start shaking if I tried to go faster. Got a engine light scan says needs knock sensor. Had it replaced. 6 months later. Car did the same thing. Same code. Knock sensor. Had it re replaced. 3 hours later car did the same thing. Each time while driving the highway almost got me rear ended. On June 27,2024 took it to ray skillman dealership. Found out knock sensor needed to be replaced again, this time along with plugs n worse apparently knock sensor throwed off spark plugs. Was told it's consuming a lot of oil they don't know why cause there's no leaks. Spent over 800 at the dealership. After paying 320. Replace part. Then another 140. Replace that replaced part. Less than a week after spending 800 at the dealership. [XXX].on my way to work my car did the same thing driving on the highway where the speed limit I think is 70. Cars flying. And almost got rear ended again. Cause the speed of the car dropped to 45, engine light start flashing. Car started shaking.. so again I'm out of a car cause it has to go back to the dealership. Not enough money for lift to work n home. About to lose my job. Just paid my car note on the 23 of june at 700 plus insurance 175.. 1300 for rent. And a minimum wage paying job at the airport. Apparently the 5 yr warranty on the car is up when I just reached 10000 miles. And I only had this car for less than 2 years I think it had 90 something thousand miles on it when I got it..i guess the makers of this car knew this trash would only last 5 yrs. reason why it came with a 5 yr manufacturer warranty Can someone please help. We the people are out of money. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

- Indianapolis , IN, USA

Cat consumes excessive oil. Smokes.

- Carlton, GA, USA

Oil consumption is absurd. 5 quarts in 2k miles.

- San Antonio, TX, USA

On April 19 of this year I was driving on the freeway and I noticed my car was losing power and my engine light came on and I quickly had to merge over to the emergency lane while my car was jerking back and fourth and making a knocking sound. I-??ve only had the car for about 5 years and I took it to the dealership and explained to them that my oil would burn faster now and I think it was messing up my engine but they didn-??t care. They said I need a new engine now and it-??s going to cost me $6200 to fix and I-??m still financing on this car.

- Perris, CA, USA

Unknown all I know is my check engine light came on. And was told from O-??Reillys that my knock sensor was bad. And I have warranty so I reached out to you guys but still haven-??t got a call back

- Seattle , WA, USA

Engine is burning 1-2 quarts of oil per week. I work from home so it only get driven once or twice a week max. I-??m still making payments on a car that is unsafe to drive, eating oil, and running potential for the engine to lock up due to it being the exact same engine with the exact same issues as what is in prior years but for some reason to 2020 was not included in the recall. I am a single mother of 4 and can-??t afford to put thousands of dollars worth of work into this car, that-??s why I bought newer for reliability and I can-??t even confidently put my kids in this car and am stuck with it for another 4 years. Kia needs to address this!!

- Crittenden , KY, USA

This is my 3rd or 4th complaint on here with NO RESPONSE, HELP, OR ACKNOWLEDGEMENT! My 2020 finally got engine put in and car does not drive the same. Steering wheel acts weird, the engine has a sound, the anti collision lights went off twice, but could be due to weather. Kia told me that it's my responsibility since my yr is not on recall. I'm surrendering this car asap to give me piece of mind before another engine is due. I met several people at kia that are on their 2nd and 3rd engine and the mechanics told me they know I will be back for another engine! This is wrong and now I'm out of alot of money and surrendering this will add more negative factors. I have my receipts but im not posting publicly

- Conway, AR, USA

I was driving my car and all of sudden it lost power. It would not go over 25-30 miles an hour. Then a loud, banging or knocking sound started. It has not been driven now for almost a year because of the knocking sound and no power. I-??m paying for a car that does not work and to no fault of mine. It seems to match the other recall complaints but mine isn-??t covered? This seems to be really unfair. If it is having the exact same issues as the year before mine it would seem to be the problem was never fixed. I will never buy another Kia due to this issue. It is such a huge safety concern and it seems like until someone is injured or worse then they might do something about it. They should be proactive on issues that seem to be going on with the same vehicle when it-??s the exact issue that is going on with the year/s prior to my car.

- Dexter , OR, USA

The contact owns a 2020 Kia Optima. The contact stated while driving 30 MPH, the vehicle went into LIMP Mode. There was no warning light illuminated. The vehicle was taken to an independent mechanic, who diagnosed that the engine consumed an excessive amount of oil and determined that the engine needed to be replaced. The vehicle was then taken to the dealer, where it was diagnosed that the transmission fluid, knock sensor, and spark plugs needed to be replaced, and a complete fuel system cleaning was needed. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 80,000.

- Orlando, FL, USA

My 2020 Kia Optima had engine failure and engine is being replaced now. I've had this car for 1yr/84k miles. It went limp on the freeway 2 mos ago and I could've caused an accident when it shut down. Would not go over 30 mps, engine light kept blinking and had knocking sound. Diagnostic code as the other recalls, Engine is same for the other recalls 2.4 Theta, oil was black and almost empty & just had oil changeI called kia corporate and they told me that they are not covering it since its not a recall. I have extended warranty but CNA National Warranty will only approve a used engine and a new one I would have to pay $3,000! I have made 2 car payments for a car that is immobile, $200+ for deductible, and $600+ for car service, this is not right at all. How can I get Kia to correct this. I do not want this car or any other kia! I cannot afford xmas this year all because I chose the wrong car maker!!

- Conway, AR, USA

Oil plug fall out at highway speeds, engine failure. Engine stalled while driving, got vehicle to side of road, called tow truck after attempting to restart. When tow truck driver pulled vehicle onto the flatbed a massive amount of oil came out. After driver towed vehicle home he looked for a hole in the block found where plug had fallen out and advised us to look in the skid plate to see if oil plug was there, if we were lucky we could put it back in, fill with oil and restart. That is when it became obvious that the oil came from drain plug site and oil plug was found. Put plug back in, filled with oil and let the vehicle sit for a while before attempting to restart. Engine would not crank. Had vehicle towed to KIA service center by neighbor and dropped off where it was"lost" for two weeks. After they "found" my vehicle they scheduled a time to look at it. They called needing permission to put in a new starter and told us if they installed the started and the engine failed the test, engine repair would be covered under "this campaign". They put in the starter, ran an engine test and confirmed a new engine was needed. They called later that day, said it was not covered under warranty or campaign. I could not afford the engine replacement so had it towed back home by neighbor after paying for the starter. Car is at home parked and has not been touched since getting it back here. Plug fall out was 4,000 miles after last oil change. Vehicle went into limp mode one time, did need a boost a few times and the day off plug fall out my son was on his way home from work, headed to auto parts store to have them check battery, starter and alternator.

- Coal City, WV, USA

I purchased my 2020 kia optima 8/2022. On 10/21/23 I was on the freeway and the engine light started flashing, car made a knocking sound, went limp, speed dropped from 75 to 32 quickly while I was changing lanes, and Would not go over 32 mph. I made it home and started researching online and found out about the recalls. My car is not one since it's a 2020. I removed the car from my garage and parked it at end of my driveway and it's still sitting there as of today 11/13/23. I ordered a diagnostic reader and it stated code 1326 for engine. My car has done same things as the other recalled cars, same code, and same 2.4L Theta ll engine. I called Kia Corporate office on 11/13 (case #15978041) they stated my car is not one of the recalled cars, my warranty expired at 60k, and everything will have to be paid out of my pocket! I asked to speak to a supervisor and was given their voicemail. I called Kia here in Conway, Ark and they stated to bring car in for them to test it. Towing and testing would be at my expense. My insurance might cover towing and since I have extended warranty then they will need that information. I am not involving my insurance since alot of companies will not cover my vehicle due to the recent theft issue defect. They could drop my car to avoid possible liabilities. I should not have to involve my extended warranty since this is a Kia problem and I do not have money for a deductible for new engine. They knowingly put those same raggedy engines in the 2020 kia's, settled the recall case and now expect the consumer to come out of pocket for their fraud. Kia needs to come tow this car, provide me a rental, and replace the engine. They need to pay my car note and insurance for the months its not driveable, but thats legal issue I will address

- Conway, AR, USA

The contact owns a 2020 Kia Optima. The contact stated that while her husband was driving at an undisclosed speed, the vehicle was shuddering. The contact's husband was able to drive to the residence. The vehicle was then towed to the dealer, where it was diagnosed with DTC Code: P0304 -??Cylinder # 4 misfire). The contact was informed that the engine needed to be replaced. The dealer informed the contact that the warranty had expired. The vehicle was not repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 123,000.

- Akron, OH, USA

My engine is failing as of right now. It has yet to completely fail, but I was told by KIA today that it-??s failing and they don-??t know how long it has left. I just thought I would try and get a re call on it to get it fixed instead of putting myself or others at danger if/when the engine does fail.

- Nashville, TN, USA

I was told by me dealership recently that the Kia Optima is not designed for high mileage. It-??s been consuming oil and my dealership was aware of the issue. Yesterday smoke came out from under the hood and the engine and front half of the car was engulfed in flames.

- Highland , IN, USA

My engine needs to be replaced

- Phenix City, AL, USA

On July 4th 2023, I was driving with my son in car, when unexpectedly the check engine light came on and car lost power. We were on a highway with a 65mph speed limit. I was able to pull over to side of road. Car did Start back up, however was missing and misfiring. Shaking especially under acceleration. My engine has been consuming oil for many thousands of miles, it is documented; however only an oil consumption test was performed. Hyuandai and Kia has serious engine issues and they know it. This could've been worse. Luckily I still had some brake pressure to get off the road. With this stalling on the highway, it is very dangerous.

- Butler, PA, USA

Dealers claim pistons are bad and engine is stalking eating through 2 quart every thousand miles or less. Properly maintained and everything not sure why the pistons would be bad already, also replaced a pcv sensor to fix problem but did not change anything.

- Hemet, CA, USA