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2011 Kia Optima engine NHTSA complaints: Vehicle Speed Control

NHTSA — Vehicle Speed Control Problems


really awful
Crashes / Fires:
4 / 1
Injuries / Deaths:
1 / 0
Average Mileage:
48,195 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Kia Optima engine problems

engine problem

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2011 Kia Optima Owner Comments

problem #10

Jun 192017


  • 93,300 miles


We were driving on a slightly curvy and hilly road where the speed limit was around 45 and the car lost all RPM and the oil pressure light and check engine light started flickering, there was a notable engine knocking heard during this time. We pulled over at that time.

- Champaign, IL, USA

problem #9

Mar 022017


  • 140,300 miles
The engine knocking and check engine light on and stability light for speed control. Took car several times to dealer and they finally told me about the engine need work done to it because they have done all they can do to solve the problem. I paid for them to replace oil control selenoid and the code poo11 still comes up. The car cuts off in traffic.

- Hephzibah, GA, USA

problem #8

Oct 122016


  • 120,350 miles
Vehicle was accelerating at 60 mph on the highway when the engine shut off, no power. The vehicle had enough momentum to drift across the slow lane to the shoulder. Car did restart. A child was in the vehicle and thankfully they were not rear-ended. This incident happened a second time while accelerating and prompted with clicking noises under the dash. The vehicle was brought to our local mechanic who stated that the engine failure at 120,400 miles.

- Buda, TX, USA

problem #7

Jun 212016


  • miles


The contact owns a 2011 Kia Optima. While reversing the vehicle, it independently accelerated in reverse and crashed into a parked vehicle. The vehicle then accelerated forward and crashed into a house. The air bags failed to deploy. A police report was filed and there were no injuries. The vehicle was towed and was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.

- Fairburn, GA, USA

problem #6

Jan 242016


  • 38,000 miles
Travelling at approximately 30 mph (had just turned onto road)when engine seemed to accelerate on its own. Pressed brake pedal (hard) and did not slow car at all. Continued to press brake and also pumped but nothing slowed vehicle. Although saw truck well ahead of me stopped, I could do nothing to stop or even slow down. I wrecked into back of truck stopped ahead of me waiting to turn. Approx $8000 damage to my car mostly due to truck having a sizable trailer hitch on back that busted through a lot of front end plastic, cooling system, etc and buckled hood. No injuries but if would have happened at higher speed it would have been tragic. Officer upon arrival also noticed thatbrakes seemed to fail and noted it on his police report. I have since found internet sources indicating that some 2011 Kia had in fact has a tsnb issued for unintentional acceleration problems. I never received such a bulletin and have had numerous services performed at Kia dealership. Also, have had brakes checked multiple times at dealer and delaer inspection never indicated any problems. I hav ealso found documentation online that says if you have an unintentional accelleration, pressing the brake hard is the first step to do, but once you let off the brake, you totally lose brake pressure. Who possible would know that ? this accident is totally the result of a system failure of the vehicle and I am asking for assistance in persuing my damages as a result of this failure.

- Louisville, KY, USA

problem #5

Dec 072015


  • 25,000 miles
The contact owns a 2011 Kia Optima. While driving 10 mph and proceeding to stop, the brake pedal was depressed but the vehicle failed to stop. The vehicle began to surge forward without warning. The contact's vehicle rear ended another vehicle. A police report was filed. Injuries where sustained, but medical attention was not required. The vehicle was not diagnosed or repaired. Prior to the crash, the vehicle was diagnosed three other times and it was determined that nothing was wrong with the vehicle. The manufacturer was not notified of the failure. The failure mileage was approximately 25,000.

- Cherry Hill, NJ, USA

problem #4

Jun 062014

Optima 4-cyl

  • 29,500 miles


This is the second time I report this unintended acceleration, last month happened on May 4, I documented in my previous complaint, they returned the car 5-21-14 they didn't find anything, on June 6 again the car accelerated when I was stepped on the brake and ready to put it in park, they told me to take the car to another dealer until now don't hear from them, called Kia in California left messages no call back, today a got a hold with another person jenny, and she repeat like a broken record we cannot duplicate the problem but they still keep the car for a long time, I have a case # [xxx] the NHTSA should investigate this, like I explained to this lady engineers should look at this situation not the mechanic, is something to do with the computer, they just follow instructions and their machine tell them nothing is wrong, like I mentioned before in my other complaint this one is the fourth time that happened, what are we waiting that some people got kill to investigate, look at the problems that Toyota and general motor had, they wait until people died then start doing something, thank you to this site that we could voice our concerns. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6) updated 1/6/2015

- Harwood Hts, IL, USA

problem #3

Jan 152014


  • miles
The contact owns 2011 Kia Optima. The contact stated that while at a stop with the brakes depressed, the engine rpms increased as the vehicle abnormally accelerated six feet. The contact was able to bring the vehicle to a stop by depressing the brake pedal with force. The sudden acceleration was experienced on two separate occasions. The dealer performed a diagnostic but was unable to generate a failure code. The manufacturer was made aware of the failure. The failure and current mileage was 18,100.

- Chery Hill , NJ, USA

problem #2

Apr 252013

Optima 4-cyl

  • 28,500 miles
On April 25th, 2013, I drove from the atlanta area to shannon, ga. Near adairsville, ga. I stopped a the gate put the car in park, set the brake. Before I could get out the car surged forward smashing the gate. I hit the brake, backed it up, put it in park, set the brake and again before I could get out it surged forward. This time when I backed up put it in park I turned off the motor. Jumping forward in my story, I called Kia and found out the car was on recall. I looked it up on the internet only to see the notices would not be sent out until May 2013. Kia. Is replacing the part but will not fix the front end damage. They told me to call my insurance company. Kia ran some test and said it showed nothing wrong with my car. I would have been run down and killed or in the hospital. All I ask is for them to fix the front end of my car and replace the gate. They still have my car so the mileage is and estimate. I did use cruse control. Case #[xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Riverdale, GA, USA

problem #1

Dec 242011


  • 7,000 miles
The contact owned a 2011 Kia Optima. The contact stated that while driving 65 mph, the vehicle began to decelerate abnormally. After a few moments, the vehicle suddenly surged forward. The contact maneuvered the vehicle to the shoulder and stopped. Black smoke then began to rise from under the hood and the vehicle was immediately engulfed into flames. The fire department appeared on the scene to extinguish the fire. The vehicle was destroyed and towed to a towing lot. The vehicle was not examined for the cause of failure. The manufacturer was made aware of the failure and offered no assistance. The failure and the current mileages were 7,000.

- Lowell, MA, USA

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