2017 Kia Cadenza

I currently have a complaint 11709255 regarding the electric thermostat. I just had that part replaced in November of 2025 for the 3rd time. Last week, again I had a warning of engine problem. The next day there was cold air blowing when the heat was on. The dash thermostat immediately began to move to hot. I was thankfully close to home. I turned car off and fan continues to run under the hood. I cannot afford to keep having this part replaced. Please look into this. This is not right.

The vehicle harness is burned and under recall sc206 for HECU fuses that was allegedly repaired which should have required a check of the harness connections . part number 91223f6632 is for the wire harness during engine replacement for campaign wty039 I was told the harness was melted and needed replacing , dealer put the car back together and told me we had to wrap up the work and return rental and get my car knowing it is a fire hazard I was in contact with warranty company for escalation who would not cover the recall part according to the dealer , I am still in escalations with Kia I have been left with no vehicle .engine repair was completed via dealer ,but they have reinstalled the broken harness and told me the car is ready for pick up. I am a disabled woman with small children and do not want to burn up in a fire was advised to report to dmv and nhtsa

I have and am the original owner of a Kia Cadenza 2017 with the 3.3L Lambda engine (same engine as the Sorento lawsuit). The vehicle is currently at the dealership getting repaired due to carbon buildup causing the fuel injectors to malfunction( despite of consistently being on top of maintenance and oil changes).I have read online of lots of users with failed engines due to carbon buildup in these engines. The warning lights I got were p0171,p0174, and p0191, and am worried that after the repair the engine will eventually fail due to the buildup as the main issue isn’t properly being addressed. The issue occurred about 300 miles ago where the dealership erased it. Then told the vehicle did not have any issues. Brought it back to the Kia dealership where they finally gave a proper diagnosis after being told nothing was wrong with car. I am concerned as there are lots of owners online experiencing the same issues with their Kia cadenzas and nothing done about it. Took the vehicle in after it stalled in traffic, but, as seen, the repair cost is high and a temporary band aid.

Check engine was flashing in front of my house in Brookhaven Pa. Took to mechanic around the corner, diagnosed with a blown head gasket & oil in my anti freeze over flow. Internal engine failure. Had towed to Kia dealership in NJ

This vehicle was inherited to me in 2019 from my father who puchased it cash on 10/13/2017. On 4/19/2018 he brought it in for a check engine light which was related to recall sa299 (ELECTRONIC THERMOSTAT). On 7/11/2018 service was performed again. On 3/4/2022 I brought in for check engine light with same recall for ELECTRONIC THERMOSTAT. On 11/10/2025 car showed engine overheating. In fear, I immediately brought to closest mechanic stating same problem, ELECTRONIC THERMOSTAT AND RADIATOR HOSE WHICH GOES HAND IN HAND. Before work began I left voice mails and emails with the service manager of Rohrman Kia in Schaumburg, Il. No one reached out. I spoke with Jim at same location on 11/10/2025 at 4:00 pm who told me it was my responsibility because the part was no longer under warranty. I filed a complaint (24149522) with BBB. on 11/13/2025 after I had to pay my mechanic $1000 to fix problem which obviously is a defect. On 12/3/2025 I spoke with Mike from Kia who said part was no longer under warranty and will not reimburse. I asked him to prove the previous thermostat was installed correctly according to the service action sa 346 and he said they have certified techs and they do not have to prove that to me. I would like Kia to accept responsibility for this part. Also carfax does not show all times Kia replaced that thermostat.

I am submitting a complaint regarding my 2017 Kia Cadenza related to an ongoing airbag system failure and Kia’s refusal to cover the repair under their existing airbag warranty extension. My VIN is included in Kia’s WTY027 warranty extension, which extends coverage for repairs related to the Airbag Warning Light illumination from 5 years/60,000 miles to 15 years/unlimited miles. Despite this, Kia Affairs has denied coverage because the diagnostic trouble codes (DTCs) pulled by the dealership do not “exactly match” the codes listed in the extension, even though the warning light is on and the issue affects the Supplemental Restraint System (SRS). Kia Affairs acknowledged the problem and escalated the case to their District Parts & Service Manager (DPSM) for possible goodwill coverage. However, goodwill is discretionary and not guaranteed, leaving me potentially responsible for expensive labor costs on a federally required safety system. My Concerns: The airbag light remains illuminated, which means the airbags may not deploy in a crash — a critical safety hazard. Kia’s decision to exclude legitimate SRS failures because the DTCs do not exactly match their list undermines the purpose of the warranty extension. Owners whose VINs are included in the extension are still being denied coverage based on technicalities, despite facing the same safety risk. Requested Action: I request that NHTSA investigate whether Kia’s narrow, code-based coverage criteria is improperly excluding safety-related airbag failures that should be repaired under the warranty extension. This appears to leave consumers unprotected from a defect in a federally regulated safety system. I can provide: The dealership’s diagnostic codes and repair order. Correspondence from Kia Affairs regarding the denial. Warranty extension documentation showing my VIN is included. Thank you for your time and attention to this matter

While driving 80 mph on Interstate 25 in Wyoming, my wife, great granddaughter (in a car seat), and I (driver) suddenly heard a LOUD bang, followed by wind noise coming from the top of the car. I opened the moonroof and found that the sunroof had exploded and shattered. We were on the northbound lanes with no traffic, other than 1 pickup truck in front of us by approximately 200 yards.There was no evidence of debris hitting it. Temperature was in the low 80’s at approximately 5:30 pm. I have no explanation for the sunroof exploding. Being that the incident happened on Friday evening, I have yet to take the vehicle into a dealer or glass shop

A little history, my Cadenza was placed at KIA of Bradley [XXX] 2024, I complained of oil burning, the oil sending unit light staying on and the engine dying. The Kia rep found “THE OIL PRESSURE SENDER INTERNALLY FAULTED, LEAKING OIL INTERNALLY – OIL LEAKING DOWN TO PIGTAIL HARNESS”. The Oil pressure switch and wiring harness lead were replaced. Here lies the problem. During my visit in Feb, I told Kia about the burning oil smell, I provided a video of the smoke coming from the engine and the oil light staying on. I was relying on Kia’s expertise because it’s their product. The complaints I had were about the same issues the KIA Sorento 3.3 L had, considering my Cadenaza has a 3.3 GDI engine also. The Sorento’s engine was recalled. Move forward to [XXX], 2024, I brought my Cadenaza to Kia of Bradley to have my windshield fluid motor checked because only the passenger’s side was spraying fluid, after Kia telling me the car would probably be held for a couple of days I decided to come back later. Here lies the problem, during the visit a Vehicle inspection was supposedly done on my car. Mind you, I have always had oil checks done and regular maintenance done (I have receipts to prove it). [XXX], stated the things that need to be done I had done by another dealer and there was no mention of oil being low for the car nor problem with the Oil sensor unit that was replaced in Feb 2024. Mind you, I never had any low oil engine light come oil or any OIL LEAKS OR COOLANT LEAKS ON THE FLOOR OF MY GARAGE. I figured my OIL AND COOLENT LEVEL WERE FINE, I never gotten any warning lights from the newly replaced Oil sender unit. I took my KIA Cadenza to Firestone in Mokena, IL to service my windshield motor on [XXX]. Firestone performed a basic check of my car that Kia of Bradley performed [XXX], 2024. Firestone found there was no oil in the engine because the engine burned it all and my coolant was burned inside of my engine also. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Actuator in Drivers door has failed. Unable to Lock or Unlock car door.

Problem unknown, i was driving to my friends house with 2 kids, about 2 mins from the house the steering wheel light started flashing on my dashboard, nothing major happening, so slowed down got to the house. When at the house realized a light come from the engine bay. A fire started out of no where. I used a fire extinguisher to put out, even moved some plastic from wheel well to completely put out. Tow truck driver (non mechanic) told kia that the plastic caused the fire. Was told no warranty or recall for kia to do anything for it, i have to pay out of picket for it.

Strong fuel odor after filling up fuel coming from the driver side, and can still be smelled inside the vehicle.

I purchased my 2017 Cadenza, Sept 2022. I've always had problems with the engine. Coolant loss, smoke from the engine after drving , loss of power and oil loss. This past August 2023 I had to replace my AC valve for 3800. My engine has gotten worse. smoke constantly comes from the engine and now my oil sensor light is coming on. I've always done maintenance on the car. Oil changes and the required milage maintenance. I've notice other owners of the 2017 cadenza have had the same problems. I'm the next step will be my engine sizing. I notice several 3.3 engines and 2017 models have been included in the recall. My 3.3 engine is doing the exact things of the other recall cars. I hope my car is included in the recall thank you.

Unknown

McGrath Arlington Kia in Palatine, Illinois stated I had a recall I live over 55 miles from this location. Base on the distance my contract states I can pick a closer location. When I contacted Bill Walsh Kia in Ottawa, Illinois. Service department stated they can not find the recall in there system, so they can't fix the recall. Their explanation was that my car had done made in Korea a Kia motor corporation. So I'd have to take it to Korea to get it fixed. Please advise on fixing recalls for this car. I didn't know this would be an issue when I purchased it. Cell [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

The contact owns a 2017 Kia Cadenza. The contact stated that the front passenger’s seat belt failed to latch or retract as designed. The vehicle was taken to the dealer where it was diagnosed that the upper and lower seat belt retractor had failed and needed to be replaced. The vehicle had not yet been repaired. The manufacturer was notified of the failure. The failure mileage was approximately 60,000.

The contact owns a 2017 Kia Cadenza. The contact stated while the vehicle was parked in the garage, she noticed that the engine oil had leaked onto the ground. Additionally, the contact stated while driving 55 MPH, there was smoke coming from underneath the hood. The low oil pressure warning light was illuminated. The contact veered to the side of the road. The contact then drove to a nearby dealer, where it was diagnosed that the oil gasket and the valve cover needed to be replaced. The vehicle was repaired. The contact stated that upon picking up the vehicle from the dealer, she noticed that the low oil pressure warning light was illuminated. The dealer was informed of the failure and determined that the oil pressure safety switch needed to be replaced; however, the part was not available. The dealer ordered the part and informed the contact that the vehicle was safe to drive. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a recall related to the failure. The failure mileage was approximately 35,000.

The contact owns a 2017 Kia Cadenza. The contact received notification of NHTSA campaign number 21V137000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

This is about a recall not solved in timely manner by KIA Van Nuys Dealer and must include the Corporate Office since they were informed by me that the dealer did not respond to my inquiries after many attempts, from my side, in order to resolve the recall. The original letter from Kia Motor America, Inc. , Corporate Headquarters, 111 Peters Canyon Road, Irvine, CA 92606-1790, USA, was dated April 30, 2021, being received by me about 10 days after. I did call the dealer and got an appointment for 5/22/2021. That day the recall was not resolved since the part the dealer had was not for the Cadenza. I return a week later on 5/29/2021 and the recall could not be solved since they did not received the part. After that I waited for another 10 days before call the dealer to find out what was the status of the part. Someone at the customer service did let me know that the part had not been received yet by the dealer and I will be called as soon as they got the part. After a couple of weeks without knowing nothing I did call and left message. Nobody return my call/message neither by phone or email. After few days I did fill a complaint form at the Kia Corporate Headquarter Office website. Again after about 10 days someone did call me and let me know that that office will contact the Kia Van Nuys dealer and then this office will contact me back again. Until today -after a month- I did not receive any call/email from this Corporate Office as well. (?) Few days ago I contacted the Bureau of Automotive Repair and an agent contacted me by phone ([XXX]) after I received a letter from this office. He said that he will contact in person to the GM dealer. But he said that they can't do much since there's no law that can enforce them to resolve a customer service issue. (???) This is more than a CS issue, this is a safety issue where is a risk of fire. That's why I writing this. Hoping that NHTSA could help me in resolve this recall. Thank you. [XXX] . INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

BOUGHT A LEFT OVER 2017 KIA CADENZA IN JULY OF 18,WITHIN FIRST 10,000 MILES CAR STARTED SOUNDING LIKE A HELICOPTER,TOOK TO THE DEALERSHIP,THEY DROVE IT,THOUGHT MAYBE A WHEEL BEARING,REPLACED THAT,ROTATED TIRES TOLD ME TO DRIVE FOR AWHILE AND SEE IF THAT CHANGED IT,WENT BACK 3 WEEKS LATER SAYING NEED TO ROTATE TIRES THEN WENT BACK AGAIN AT 17500 MILES WITH SAME ISSUE,SERVICE ADVISOR ASKED ME HARSHLY 'WHERE HAVE YOU BEEN DRIVING THIS THING', I TELL ON THE HIGHWAY TO AND FROM WORK AND DAILY DRIVING,HE TELLS ME YOU KNOW YOU CAN TAKE THIS TO ANY OTHER DEALERSHIP, I SAY NO IT'S CALLED LOYALTY, I SPEAK WITH SERVICE MANAGER,HE DRIVES THE CAR REALIZING IT IS LOUD,HAS TIRES TAKEN OFF ANOTHER IDENTICAL CAR,SOUND GOES AWAY,HE TALKS TO KIA,THEY DECIDE TO GIVE ME NEW TIRES,THEY WERE INSTALLED CAR DRIVE FINE TILL ABOUT ANOTHER 12000 MILES AND NOISE CAME BACK,I WENT TO A DIFFERENT DEALERSHIP FOR A OIL CHANGE 2 TIMES AND THEY NEVER SAID ANYTHING ABOUT TIRES ON THEIR INSPECTION,DECIDED TO GO BACK TO ORIGINAL DEALERSHIP AND THEY TELL ME TIRES ARE FEATHERED AGAIN, I SAY HOW IS THAT POSSIBLE I HAVE NEVER HEARD OF A CAR GOING THROUGH 2 SETS OF TIRES IN 37000 MILES,THEY TELL ME IT'S OUT OF ALIGNMENT AGAIN, I HAVE NEVER HAD A CAR NEED ALIGNMENT BEFORE A 100000 MILES NOW THE CAR SHAKES AND SWAYS WITH THE GROVES IN THE ROADS AND NEEDS A THIRD SET OF TIRES AT 37000 MILES I BELIEVE THERE IS A PROBLEM WITH THE CHASSIS OF THIS CAR,MECHANIC AT THE DEALERSHIP TOLD ME THESE CARS ARE KNOWN TO FEATHER TIRES.

THE DRIVERS SIDE SEAT BELT QUIT ROLLING UP SO THEY WOULD NOT WORK IN A CRASH. DEALER NOTIFIED THREE WEEKS STILL NO PARTS