2018 Kia Optima Driver assistance Problems

Purchased car about 4 months ago, before warranty ran out, the shop looked at it told me it was fine, it wouldn't accelerate. Few weeks later same issue but all my oil was gone, they found 11 things wrong with the vehicle, told me warranty wouldn't take care of it unless the engine blow up. The salesman Scottie Mitchell told me check Kia for recalls, called Kia 3 recalls, they were trying to finance another car higher, back wanted to know why the dealership didn't know about recalls, Kia place did call a Robert. One of the owners did know about recalls, why dealership didn't pass them on. They trying to sell me a higher vehicle to keep cover the cost of the one I got 1st

NHTSA ID

11672508

Incident

Jul 10, 2025

My engine burns oil very bad. Black smoke comes out of my tailpipe and I burn through 5 quarts in less than a thousand miles. I just got my oil changed two weeks again and I just had to add more oil to my car bc it was empty. I’ve had to replace the spark plugs twice due to soot build up. I can’t afford a new car I’m 17 and can barely afford the maintenance let alone a whole new engine. Have spoken to many mechanics and they all say the same thing “it’s a Kia it’s gonna burn oil” ITS A KNOWN ISSUE. And yet Kia will not resolve it bc they don’t want to spend their own money to fix their mistake. I got an estimate for a new engine which is basically crucial and it’s over three grand. No matter where I take it everyone always says the same thing- to get rid of it before it’s too late. But I simply cannot afford to do that and I know my car is not the only one with this issue so many other people with the same car/engine have the same issue. 2.4 L GDI !!!!! I wish someone would have warned me before buying Kia. A recall to fix this issue is needed now. I lose control of the speed sometimes. I will keep my foot at a set position on the throttle and the engine will take off because it’s jumping to the usual power it should have. ( it has reduced power most of the time bc of the struggling engine) sometimes on the highway I’ll get a sudden burst of power and I have to let off the accelerator. Not safe at all

NHTSA ID

11637108

Incident

Oct 10, 2024

I purchased my 2018 Kia Optima directly from the dealership, brand new. I've had the vehicle since then and have followed all of the warranty guidelines and only went to them for oil changes & other maintenance issues. Since February 2023 I've noticed where i've been having oil loss, but no sign of an oil leak. When I first noticed this, I would take a turn and my oil light would come on. I'd check the oil and it'd be low so I would refill my oil. However, this was happening 2 months after my last oil change which wasn't normal. I took the vehicle to Kia and they did an "Engine Consumption Test" where I had to drive for 1000 miles with a seal on the drain plug. After the 1000 miles, I came back and I was only 1/2 quart low. According to Kia it didn't meet the guidelines for engine replacement so they topped off my oil and I left. About 2 weeks after, my oil light came back on. I went back to Kia and spoke with the Shop Manager who stated I was 3 1/2 quarts low! He added oil to my engine and we did another round of the consumption test. When I came back in after that, I was 2 quarts low so that meant I qualified for a "Consumption Cleaning". They kept my vehicle overnight & I had to drive another 1000 miles. When I came in after my 1000 miles again I was only 1/2 quart low and therefore Kia said there wasn't an issue. I've reached out to multiple auto repair shops who state it is a Kia problem, that the engine is using it and processing it out of the exhaust. I don't know what else I have to do in order for Kia to honor the 20 year, 200k warranty. I have all documentation for all of my oil changes and from the consumption tests also.

NHTSA ID

11550168

Incident

Oct 11, 2023

What component or system failed or malfunctioned, and is it available for inspection upon request? ******Speed Control- Vehicle will stall while on road/ highway causing rear vehicles to brake. How was your safety or the safety of others put at risk? *****Several times I was forced to pull over to side lanes to avoid being rear ended. *****Has the problem been reproduced or confirmed by a dealer or independent service center? I have called dealership several times in regards to this issue, all I was told was to do not use A/C or heater as that will make the vehicle lose power. Refused to conduct was full inspection of vehicle. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? *****No, no it has not been inspected Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? *****No warning lamps not symptoms of the problem prior to the failure.

NHTSA ID

11547817

Incident

Sep 4, 2023

Car will NOT go pat 60mph and i haven’t had this car just over 6 months. And the camshaft sensors are gone out. Smoke comes out the pipe when mash on gas…. It is really a bad vehicle. And Southeast auto refuses to fix it. I really honestly think the motor is bad in it. Because I been having issues with it since I had it

NHTSA ID

11545624

Incident

Sep 15, 2023

Knock sensor detection system. Driving and all the sudden felt like it hard down shifted… car behind me almost hit me. Engine light started flashing so I pulled into autozone and plugged it in and got the knock sensor code. It’s had oil consumptions issues for a while. It’s so dangerous to drive with limited power and speed

NHTSA ID

11527753

Incident

Jun 15, 2023

Ever since I got my car I’ve had black oil since the start . Second my car breaks on its own at times 3rd my car system keep breaking down as the sparks leaking in some where has this issue since bought it 2 years ago low miles

NHTSA ID

11524862

Incident

Jun 1, 2023

-Knock Sensor Detection System - ECU Logic Improvement - I Was driving with my infant son in the backseat. I was going 70 mph when my car started rapidly losing speed. This happened again with just myself after receiving the car from mechanic. There was heavy traffic and I had to swerve to avoid being hit by an 18-wheeler. - I can see on the website where I received the car from, there is a recall for my exact make and model with the same code but they say there is no recall for my specific car. - The check engine light started flashing and Kia Systems starts talking.

NHTSA ID

11524617

Incident

May 26, 2023

Car smoking white , and driving slow after I hit a pothole when it was raining hard.

NHTSA ID

11524344

Incident

Feb 6, 2023

Mileage

106,983 mi

ECM telling fuel pump to put too much gas, causing exhaust into cabin, unnoticed while in car, but hair and cloth reak of exhaust and getting headaches. Reduced mileage by 20+mpg from 30+ to 11mpg. BSD- no lights or codes thrown by 3rd party, but dealer said there was a code on the BSD. BSD was not working and no codes appeared. NO LIGHTS OR CODES FOR FUEL ISSUE OR BSD, but dealer said there is a recall that I cannot find for fuel and said there was a code for BSD, but it didn’t pop up on my husband’s code reader previously.

NHTSA ID

11477875

Incident

Aug 4, 2022

Engine overhead and stopped working in addition to it consuming massive amounts of oil without physically putting oil in. I've went to 2 dealerships who refuse to provide me with a new engine even though I'm covered under the engine extension warranty due to me having the knock sensor update done. I am now involving my attorney and will go to the news channels to inform how kia manufacturer has become a disgrace with not providing quality engines in their vehicles and don't want to be responsible for it. there's already a settlement going on for kia optimas and other cars they've made because of faulty engines. They can better believe I'm coming for them next with a lawsuit.

NHTSA ID

11463963

Incident

Apr 19, 2022

WHEN I GO TO ACCELERATE FROM A STOPPED POSITION; THE CAR STALLS AND TURNS OFF AND THEN IT TURNS ITSELF BACK ON. ADDITIONALLY, WHEN I DRIVE OVER 50 MPH THE CAR/TIRES START TO VIBRATE.

NHTSA ID

11360439

Incident

Sep 1, 2020

Mileage

102,000 mi

HELLO I AM NYCHOLE AND IN OCTOBER OF 2017 I PURCHASED A BRAND NEW 2018 KIA OPTIMA . NEVER REALLY HAD ANY ISSUES WITH IT UNTIL FRI NOV 22. AS I WAS LEAVING FROM WORK MY CAR DID A VERY ABRUPT JERK THAT I ACKNOWLEDGED BUT DIDN'T THINK ANYTHING OF IT BECAUSE MY GAS LIGHT HAD JUST CAME ON. BUT TODAY WHICH IS SUNDAY MY CAR'S EPS (ELECTRIC POWER STEERING) LIGHT FLASHED. WEIRDED OUT I LOOK AT THE MANUAL IN THE GLOVE COMPARTMENT. AS I EASED INTO MY APARTMENT COMPLEX THE CAR DID THAT SAME JERK, THE STEERING WHEEL WENT HARD TO MANAGE/STEER AND 6 OTHER LIGHTS STARTED BLINKING( PARKING BREAK LIGHT,EPB LIGHT ,ABS LIGHT,ESC LIGHT ,BATTERY CHARGE LIGHT, AND THE MASTER MALFUNCTION LIGHT) . I COULD NO LONGER MANIPULATE MY WHEEL SO I PULL FORWARD ONTO A OPEN SPOT AND PUT IT IN PARK. THE MOMENT I DID THIS THE CAR CUT OFF. IT WILL NOT TURN OVER, IT WILL NOT DO ANYTHING BESIDES TICK. I HAVE BEEN GREAT WITH MAINTENANCE BECAUSE IT WAS EITHER FREE OR DIRT CHEAP SO I ALWAYS TOOK IT TO THE DEALERSHIP. I HAVE READ MORE REVIEWS OF PEOPLE GOING THROUGH SIMILAR THINGS. JUST IMAGINE IF I HAD MY CHILD IN THE CAR, ON THE INTERSTATE AND COULD NO LONGER CONTROL MY STEERING WHEEL OR THE CAR JUST DYING MID DRIVE ON THE INTERSTATE HOW DANGEROUS THIS ISSUE IS. MY CAR IS BASICALLY 3 YEARS OLD AND HAS LESS THAT 50 K. IT HAS NEVER BEEN WRECKED , TOWED OR DAMAGED STILL PRACTICALLY NEW. I HAVE ALSO READ SIMILAR RECALLS ABOUT ELECTRONIC ISSUES THAT ARE ONLY RELEVANT TO THE HYBRIDS . THE RECALL SEEMS SIMILAR.

NHTSA ID

11282081

Incident

Nov 24, 2019

Mileage

57,000 mi

I PURCHASED A BRAND NEW 2018 KIA OPTIMA IN NOVEMBER 2018. I HAVE PUT APPROXIMATELY 22,500 MILES ON IT AND HAVE BEEN KEEPING UP WITH UPDATED OIL CHANGE MAINTENANCE PER THE SCHEDULE RECOMMENDED BY THE DEALER. ON SATURDAY 9/28 I DROPPED THE CAR OFF FOR A ROUTINE OIL CHANGE, AND AS I DROVE IT OFF THE LOT IT SPUTTERED AS IF IT WAS GOING TO DIE, BUT IT DIDN'T. THE CAR CONTINUED TO RUN AND IT GOT ME HOME. THE NEXT DAY, SUNDAY 9/29, IT DROVE WITHOUT PROBLEMS FOR ABOUT AN HOUR, BUT WHILE DRIVING THE CAR COMPLETELY POWERED DOWN AND STOPPED WORKING. IT WAS A TERRIFYING EXPERIENCE AS I WAS IN THE MIDDLE OF A MAJOR CITY ROAD AND ALMOST CAUSED A SERIOUS ACCIDENT. I PUT THE CAR INTO PARK AND WAS ABLE TO START IT BACK UP, AND I WAS LUCKY ENOUGH NOT TO BE STRUCK BY ANOTHER VEHICLE. THE DEALERSHIP WAS CLOSED AT THIS TIME SO I CALLED THEM FIRST THING MONDAY 10/1 TO REPORT THE ISSUE AND DROPPED IT OFF. THE DEALERSHIP IS CLAIMING TO BE UNABLE TO RECREATE THE ISSUE SO READY TO GIVE ME THE CAR BACK. THIS IS A HUGE SAFETY CONCERN AND I CAN'T BELIEVE WE AS CONSUMERS HAVE TO PUT OUR LIVES AT RISK TO WAIT FOR THE PROBLEM TO HAPPEN AGAIN BEFORE ANY RECOURSE CAN BE TAKEN. FROM MY RESEARCH ON THE INTERNET, IT IS VERY COMMON FOR THE DEALERSHIP NOT TO BE ABLE TO RECREATE THE PROBLEM SO UNABLE TO PROVIDE A FIX. KIA HAD 5+ YEARS OF ENGINE STALL PROBLEMS THAT WERE NOT ACKNOWLEDGED UNTIL MANY YEARS LATER, AND THE DEALERSHIP CERTAINLY WILL NOT VALIDATE THIS. FURTHERMORE, WHEN THE ENGINE STALLS, THE POWER STEERING AND BRAKES BOTH GO OUT, SO YOU HAVE NOTHING BUT PRAYERS TO RELY ON TO KEEP YOU ALIVE.

NHTSA ID

11265744

Incident

Sep 28, 2019

Mileage

22,500 mi

TAKARA RECALL VEHICLE POWER DOWN WHILE I WAS DRIVING 45 MPH ON A CITY STREET THE CAR WAS STATIONARY IN MOTION THEN POWERED BACK UP WITHOUT ME TURNING THE IGNITION.WAS A VERY SCARY EXPERIENCE

NHTSA ID

11218043

Incident

Jun 1, 2019

Mileage

12,098 mi

WHEN I GOT IN MY CAR THE CHECK ENGINE CAN ON. I STARTED DRIVING MY CAR TO WORK, BECAUSE I WAS NOT SURE WHY THIS LIGHT CAME ON BECAUSE THIS WAS/IS A NEW CAR. I HAVE LESS THAN 19K MILES ON MY CAR. AS I ATTEMPTED TO GET ON THE HIGHWAY THE CAR REFUSED TO SPEED UP. THE MAX THAT I COULD DRIVE WAS 60 MPH. I HAD TO PULL OVER TO THE SIDE OF THE ROAD BECAUSE MY CAR WOULD NOT PICK UP SPEED. SO I CALLED THE SERVICE DEPARTMENT, WHO INFORMED ME THAT WHEN I BROUGHT MY CAR IN FOR AN OIL CHANGE IN JANUARY THAT THEY HAS PLACE A SAFTEY FEATURE ON MY CAR TO KEEP THE ENGINE FROM BLOWING UP. ACCORDING TO THE DEALERSHIP, THERE IS POSSIBLY SOMETHING WRONG WITH THE ENGINE, HOWEVER, THEY ARE STARTING OUT BY CHANGING THE WIRING FIRST. I CAN NOT EXPLAIN HOW DIFFERENT THIS DRIVES SINCE THE WIRES HAVE BEEN CHANGED. IT IS THE WORST DRIVE. THE CAR IS VERY LOUD IT DOES NOT PICK UP SPEED WHEN IT SHOULD AND IT DOES NOT SLOW DOWN AS FAST AS IT USE TO. NEEDLESS TO SAY, I AM HAVING ISSUES WITH THIS CAR AND SEEMINGLY EVERY TIME I TAKE IT IN FOR REPAIRS, THE CAR GETS WORST. I WILL NEVER EVER BUY A NEW/USED KIA AGAIN.

NHTSA ID

11217052

Incident

Apr 25, 2019

Mileage

18,000 mi

TL* THE CONTACT OWNS A 2018 KIA OPTIMA. WHILE OPERATING THE VEHICLE AT VARIOUS SPEEDS, THE FORWARD COLLISION WARNING SYSTEM AND THE FORWARD COLLISION BRAKING SYSTEM DID NOT OPERATE AS INTENDED. WHILE DRIVING APPROXIMATELY TWO FEET BEHIND ANOTHER VEHICLE, THE CONTACT WAS NOT WARNED OF THE OTHER VEHICLE AND THE SYSTEM DID NOT STOP THE VEHICLE WHEN NECESSARY. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER (MORITZ KIA FORT WORTH, 8501 I-30 WEST, FORT WORTH, TX) WHO WAS UNABLE TO DETERMINE THE CAUSE OF THE FAILURES. THE MANUFACTURER WAS NOTIFIED AND NO SOLUTION WAS OFFERED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 300. *TT

NHTSA ID

11110921

Incident

Jul 1, 2018

Mileage

300 mi