2018 KIA OPTIMA Complaints

While driving, car in motion, Front Passenger Seat belt Audio Warning Periodically goes off without reason. Indicating seat is occupied & seat belt needs putting on. When seat has been unoccupied / clear from any type of weight on seat to trigger sensor. Audio warning will continue until seat belt is latched over the empty seat. Local KIA Service Dept was informed & could neither confirm or deny its faulty behavior for it did not present itself during time of service. They said, wiring looked fine but did no further testing. To be honest they showed no interest into seeing any real importance for my concern for them to feel any further investigation was warranted. Its happened again twice since that service visit be it last incident Aug 7th. My concern is.... if there is faulty wiring or sensor signals being crossed somewhere, whats to say there is a passenger or no passenger in that seat, to ensure the correct signal is getting to the passenger side air bags of when to correctly deploy if an accident should happen with passenger in seat? This situ is only recent starting about a year a go. So something has changed from being fine for 2 yrs up to the last year that's now showing some kind of seat belt / sensor failure. I'm unfamiliar with how that wiring system works & linked within it for me know what other things I might need to pay more attn to, looking for other signs that could be saying is direct cause to the prob. Unsure if this a simple solution or is something that others are experiencing with this year & model car & poss be a Manufacturer Part Default

ENGINE LOSES COMPRESSION AND CAR DIES WHILE IN MOTION. THIS HAS HAPPENED SEVERAL TIMES AND IS EXTREMELY DANGEROUS ON THE ROAD! THIS CAR IS BARELY OUT OF WARRANTY WITH ONLY 104,000 MILES! THIS IS UNACCEPTABLE!

While driving at highway speed my children (11, 7, & 5) and I were almost rear-ended when my Kia Optima 2018 (79k) without ANY warning loses power, jerks and then regains power. A number of vehicles behind us had slam on their brakes to avoid a pileup. My Optima almost resembled the feeling when a vehicle runs out of gas but much more abrupt. The drink my son was holding was thrown out of hand due the vehicle jerking to an almost stop and jerking back to power. No warning light, battery & alternator both test good and tank was half full. Two days pass and the same system fail while driving with the same similarities (no warning lights). My Optima is no longer under warranty and I have no financial resources for repairs.

Driving at night, was getting onto the freeway. Entrance to the freeway was on a curved street, as I was taking the turn leading into the freeway the lights turned off, Then suddenly turned back on and then off again all while I was merging onto the freeway. I quickly took the light out of “AUTO” setting. Very scary as I almost got hit by the truckers already on the freeway. I’ve had issues with the blind spot warning as well. It fails all the time so of course I never put my trust on that. The lighting situation is very scary, as it was happening you could see the dashboard setting itself to AUTO and randomly going up and down the list of options as if it was being controlled by someone else. I could’ve caused an accident. Please check this issue.

Back in September of 2020, my car randomly went to limp mode while driving at highway speeds. Had the car towed to the dealer. Dealer advised of apparent “software issue” to correct the problem. Well this happened two more times after that twice the software was updated which didn’t work. The third time the replaced the knock sensor and so far I haven’t went to limp mode, however, the car has not drove the same and seems to get worse each passing day. Rough shifting, engine vibrates more than usual. Car struggles at times to go up hills, when giving gas a though way speed the car has a few second delay. Sometimes it feels as if the transmission is skipping. The car is up to date on all recommended services, I.e transmission flush and fill etc. There are also times when the vehicle is started but struggles. Almost as if it want to loose power but it doesn’t. Has happened numerous times however recently it actually didn’t start. Struggle to turn over a couple time but then finally did. A check engine light came on but then went away the next day after driving. I have an appointment with the dealer this week to look at this and other issues, again, hoping for some progress at that point.

Problems: lights switch is in auto position and I have locked the vehicle. I noticed at least twice the exterior lights come on and stays on until I unlock start the vehicle and turn engine off. Additionally on June 3 2021 light switch in automatic position coming home at night the head lights turned themselves off the dashboard lights remained on. I was a half mile from home and able to get the vehicle home safely. Turned the headlights switch to manual to turn lights back on.No warning lights came on. Mechanic will look at vehicle later this week. I have no confidence the mechanic will be a to replicate the problem. That's their if can't be reproduced or the computer did notice, it didn't happen .The vehicle is available for inspection

WHEN DRIVING THIS VEHICLE RATTLES AND SHAKES IT HAS A BURNING SMELL/GAS SMELL. IT CUTS OFF WHILE DRIVING. LOOSES OIL.OIL AT LOW LEVEL BEFORE DUE. THIS MAKE AND MODEL IS NO LONGER BEING MANUFACTURED. IT HAS A KNOWN HISTORY OF ENGINE PROBLEMS. WHY WERE CONSUMERS ALLOWED TO BUY THIS CAR. PROBLEMS ARE ACTIVE AND ONGOING. STARTED ABOUT A YEAR OR CLOSE TO A YEAR AFTER PURCHASE. IT IS A LEMON . THE DEALER WANTS TO DIAGNOSE THE ENGINE, BUT THEY ALREADY KNOW THE ENGINE IS NO GOOD.

I WAS DRIVING ON THE FREEWAY AT ABOUT 60MPH AND SUDDENLY THE FRONT PART OF MY PANORAMIC SUNROOF EXPLODED. THERE WAS NO IMPACT OR ACCIDENT THAT CAUSED THIS. WE WEREN'T HIT BY ANY ROAD DEBRIS OR ANYTHING IT JUST EXPLODED WHILE DRIVING.

TL* THE CONTACT OWNS A 2018 KIA OPTIMA. THE CONTACT STATED WHILE DRIVING 75 MPH, THE VEHICLE ABRUPTLY STALLED. THE CONTACT STATED THAT THERE WAS NO WARNING LIGHT ILLUMINATED. THE CONTACT COASTED THE VEHICLE UNTO THE ROAD SHOULDER AND RESTARTED THE VEHICLE. THE VEHICLE OPERATED AS INTENDED. THE CONTACT STATED THAT THE VEHICLE WAS PREVIOUSLY TAKEN TO ANCIRA KIA (6139 BANDERA ROAD, SAN ANTONIO, TX 78238, (210)684-4000) DUE TO THE HESITATION AND STALLING. THE DEALER REPLACED THE SPARK PLUGS AND CHANGED THE OIL HOWEVER, THE REPAIR DID NOT CORRECT THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 17V224000 (ENGINE AND ENGINE COOLING). THE FAILURE MILEAGE WAS 72,800.

I ORIGINALLY LEASED MY 2018 OPTIMA WITH 98 MILES ON IT AND BOUGHT IT OUT AT THE END OF MY LEASE THIS WAS MY SECOND OPTIMA, I ALSO HAD 2 HYUNDAI SONATAS. SINCE I'M IN SALES I HAD THE ADDED MILEAGE ON IT. AT 98,000 MILES THE ENGINE STARTED TICKING. I ORIGINALLY HAD A 2013 HYUNDAI SONATA THAT WHEN IT HIT 105,000 STARTED TICKING ONLY TO FIND THAT IT WAS BURNING OIL (1.5 QUARTS A WEEK) SO I WAS HESITANT ABOUT ANOTHER KIA BUT THE DEALER ASSURED ME THAT KIA HAD BEEN AWARE OF THE PROBLEM AND THAT THEY HAD FIXED IT. GUESS WHAT?! IT HASN'T. I TOOK MY VEHICLE IN EVERY 1,000 MILES FOR OIL CHANGE AND HAVE THE DOCUMENTS SHOWING HOW MUCH OIL WAS BEING BURNED OFF. ACCORDING TO KIA CORPORATE THERE IS NOTHING WRONG EVEN THOUGH MY VEHICLE REQUIRES A QUART OF OIL EVERY 1,000 MILES AND WAS UNDER OWNERS WARRANTY. NEVER AGAIN. PEOPLE WATCH YOUR VEHICLES. THIS IS A KNOW PROBLEM WITH KIA AND HYUNDAI AND THEY DO NOT HONOR THEIR WARRANTIES.