56 complaints reported

2020 Kia Optima Engine

Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.

Reports
56
Crashes
1
Fires
0
Injuries
0

Complaint Timeline

Chronological view of owner reports

Mar 2025

The contact owns a 2020 Kia Optima. The contact stated that while driving at an undisclosed speed, the low oil pressure warning light illuminated. The contact stated that one quart of oil was added weekly, even though the vehicle was rarely driven. The contact stated that the low oil pressure warning light failed to illuminate until the oil pressure was extremely low. The vehicle was taken to the dealer; however, the failure was not diagnosed. In addition, the contact was informed that an oil consumption test was needed. The contact was informed that the repair was not covered under warranty. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 60,000.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jun 2023
Feb 2025

The contact owns a 2020 Kia Optima. The contact stated while operating the vehicle, there was an abnormal rattling sound coming from the engine compartment. The contact stated that the vehicle was hesitating and there was excessive oil consumption. The vehicle was taken to the local mechanic who diagnosed the vehicle and determined that the piston rings were faulty, and the engine needed to be replaced. The vehicle was not yet repaired. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was contacted. The failure mileage was 127,000.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2024
Feb 2025

My car is using a lot of oil and I have to change the oil every 2 thousand miles, oil light will come on and I check the oil and it shows the oil stick almost dry within 2,000 miles after having oil changed. The car will loose power and has a ticking noise in the motor. It’s frustrating to have to change the oil every 2,000 miles instead of every 3,000-5,000 miles like most vehicles.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2024
Feb 2025

Vehicle Check engine light started flashing on and off, Code thrown is a P1326 and vehicle went into limp mode, shutting down power essentially going down the highway. Oil burning is excessive, and replacement of oil is at 1-2 quarts every 2 weeks. Engine is not running smoothly. No warning signs of oil burn present until oil pressure light flickers on when taking a curve or sitting on a major incline. Kia Dealership is aware of an issue with the P1326 codes and bearing wear, however, year of vehicle seems to not be included in the original lawsuit and recall/safety notice from all indications. Engine was manufactured and is the same as the 2019 engine that is included. Engine seizure is potential at highway speeds which could cause major harm or death during travel without warning.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Feb 2025
Feb 2025

The contact owns a 2020 Kia Optima. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic, and the vehicle was connected to a diagnostic machine. The DTC indicated a glow relay failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 118,000.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Feb 2025
Jan 2025

Without warning my car went into “Limp Mode” while driving on the highway almost causing a collision as I was forced to pull off the road on the highway. Flashing engine light car would not accelerate and was shaking dramatically. Was forced to wait for a tow on a busy highway. P1326 code. Rod knock. A known issue for the Theta II engine. Many recalls have been made for this exact engine for these exact problems but for some reason the 2020 Kia Optima is not included even though it is the same engine covered by lifetime warranty from the 2019 models due to these recalls and know issues. There’s plenty of recorded cases all over the web and is a wide concern for many affected Kia drivers. Kia does not offer the same KRDS update to 2020 Kia drivers as they do to earlier models even with the same engine failure issues so we don’t even get the benefit of possible early detection. Car is well maintained and inspected at a local American tire depot and I am still forced to deal with unwarranted engine failure on a known defective engine solely because KIA will not offer help for affected customers. The 2020 KIA Optima equipped with the Theta II 2.4L engine is not safe and is a known defective product. Action and accountability are needed.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Aug 2025
Sep 2024

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: May 2024
Sep 2024

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

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Aug 2024
Aug 2024

Car has been excessively consuming oil for the past year. Black smoke blowing out of exhaust pipe. Engine siezed up which almost caused an accident, had to veer off the road to keep from causing myself and the other party harm. Kia is stating no recall but there is tons of motors having this same issue. The actual motor in car is a 2019 model engine.inspected by Kia dealership with no help stating out of warranty even though this has been going on for over a year.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2022
Aug 2024

The contact owns a 2020 Kia Optima. The contact stated while driving approximately 45 MPH, and depressing the accelerator pedal, the check engine light was flashing. The contact stated that the accelerator pedal was being depressed; however, the vehicle failed to respond as needed. The contact pulled over, turned off the vehicle, and had the vehicle towed to an independent mechanic to be diagnosed. The mechanic retrieved DTC code: P1326; and notified the contact that the vehicle had experienced engine failure. The contact stated that prior to the engine failure, one quart of engine oil was being added weekly. The contact called a dealer however, the Service Manager did not return the call. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 117,000.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jul 2024
Jul 2024

I purchased my car used in 2022. It had a metal clanking noise in the engine. I took it to KIA they said there was no recall open for them to check it. The sound is getting worse and the engine is now burning oil but KIA won’t do anything unless I pay them $1,200 to clean the heads and another $187 an hour to scope the engine. This has been a problem since I purchased the car and I am sure it has to do with the engine recall but they refuse to fix it or look at it. I have had regular oil changes and maintenance done at appropriate intervals.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jun 2022
Jul 2024

I was driving in the freeway to my girlfriends house and suddenly my check engine light came on and started flashing, I got off the freeway as soon as I could and parked to check what was wrong and while driving to park I noticed I couldn’t accelerate past 2000 RPM and when shifting my car was skipping and it felt like gas wasn’t getting to the engine. I checked my oil levels and they were at normal levels, the battery was fine, and the car was turning on without a problem. I ran a diagnostics code and it came up with the P13-26 Code

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jul 2024
Jul 2024

Oil leaking at drain pan and won’t come out.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jul 2024
Jul 2024

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jun 2024
Jun 2024

Cat consumes excessive oil. Smokes.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Mar 2022
Jun 2024

Driving at highway speed of 65 mph, the vehicle abruptly lost power. The check engine light started flashing. I was almost rear ended due to the loss of power, I was able to coast to the emergency shoulder and stop. The car was towed to the nearest Kia dealership. Diagnostics show code P1326, the engine has failed and needs to be replaced at a cost of over $10000. This the same engine that was included in a class action lawsuit for model years up to 2019, the 2020 was not included. Kia is offering no assistance to me as the second owner of the vehicle even thought the car only has 98,000 miles, the powertrain warranty is reduced to 60,000 for a second owner. The cost of repairs is more than the value of the vehicle.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Nov 2024
May 2024

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

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: May 2024
May 2024

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Feb 2023
Mar 2024

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!!

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2024
Feb 2024

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Apr 2024
Dec 2023

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2023
Nov 2023

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.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: May 2023
Sep 2023

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 .

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Sep 2023
Jul 2023

My engine needs to be replaced

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Feb 2023
Apr 2023

The contact owns a 2020 Kia Optima. The contact stated that while the vehicle was in for routine maintenance, it was discovered that the engine oil level was extremely low. The vehicle was taken to the local dealer who performed an oil consumption test. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 60,000.

Type: Vehicle, Vehicle: 2020 KIA OPTIMA, Manufacturer: Kia America, Inc.
Incident: Jan 2023

Trend Over Time

Complaints by year

Quick Summary

The 2020 Kia Optima has 56 Engine complaints on file. 1 crashes have been reported. Review the timeline above for detailed owner experiences.