2017 Kia Cadenza problems

Filed Oct 14, 2026 · Engine · VA

COMPONENT: Engine oil pressure sending unit/switch (part 94751-3C000, per Kia repair shop) or the oil pressure system on my 2017 Kia Cadenza 3.3L V6, about 95,500 miles. The car and any removed part are available for inspection on request. SYMPTOM/WARNING: The oil pressure warning light first appeared in October 2026 and comes on intermittently when the engine is warm and the car is stopped or idling, then goes off once moving. It is becoming more frequent. No other lamps, messages, noises, or leaks. The engine runs quietly, confirmed by Kia repair shop. No crash, fire, or injury. SAFETY RISK: I cannot tell whether the sensor is faulty or oil pressure is truly low. If pressure is low, the engine could be damaged or fail while driving in traffic. If the sensor is faulty, the light is unreliable. CONFIRMATION: Dipstick level has been normal. Oil was changed 06/13/2026 and 10/06/2026; the light lessened, then returned. A Kia dealer inspected the car and recommended replacing the sending unit, quoted at $3,060.72 since the intake manifold must be removed. The dealer has NOT measured oil pressure and says it can only do so during that repair. An independent shop has not measured it either. MANUFACTURER: Kia declined warranty coverage through the dealer, saying the part is not covered. Kia's warranty extension TSB ENG237/WTY026 covers oil pressure switch problems on 2014-2016 Cadenzas built through 01/07/2016 (part 94750-37100). My car uses 94751-3C000 and was built later. I do not know if the new part is a revision or if the same failure occurs in later 3.3L models. I ask the federal safety agency to review this in 2017+ Kia 3.3L vehicles.

Filed Aug 6, 2026 · Brakes, Engine · 165,000 miles · NY

The contact owns a 2017 Kia Cadenza. The contact stated that while driving at various speeds, the vehicle suddenly lost motive power. The contact waited before restarting the vehicle and continued driving. The ABS warning light was intermittently flashing. The failure became more persistent, causing the vehicle to lose power steering functionality. The power steering and traction control warning lights were illuminated. The vehicle was taken to the dealer to be diagnosed, and it was determined that the Motor Driven Power Steering (MDPS) and Electronic Control Unit or Engine Control Unit (ECU) had failed. The parts to replace were Part Number: 56340/F60, a genuine OEM Motor Driven Power Steering (MDPS) Control Module. The vehicle was not repaired. The vehicle was not repaired. The contact stated that the vehicle was previously included in Manufacturer Recall Number: WTY039. The manufacturer was made aware of the issue, and a case was opened. The failure mileage was approximately 165,000.

Filed Apr 22, 2026 · Engine · TX

Engine oil light is on and there is a burning smell when I drive. Fear of a fire breaking out in the engine when driving or parked. Had it looked at by a technician and they expressed those concerns to me and that brings me great worry. The service technician believed it was just the oil cap being loose but there was no evidence of that.

Filed Mar 29, 2026 · Electrical · NY

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 the federal safety agency

Filed Mar 21, 2026 · Engine · IL

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.

Filed Mar 11, 2026 · Engine · PA

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

Filed Feb 7, 2026 · Engine, Fuel system · FL

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.

Filed Jan 6, 2026 · Engine · IL

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.

Filed Oct 14, 2025 · Electrical, Engine · TX

Multiple oil, engine/knocking issues. Drove the car unaware of loss of oil ( disguised as water from days rain) no oil light or engine light appeared. When I took to dealer the leak was fixed.Multiple times of loss of oil and only once did it show on dash.I kept taking to dealership for loud knocking and was told it wasn’t reproduced. But fixed a gasket/manifold more than once. overheating of engine when I was driving out driveway. I turned around parked and had it towed to dealership. Stated faulty sensor then was called back & told i needed to pay for the fan wires that kept the engine cool because they had melted in the process.i have had issues with right brake fluid and boot as well. Changed brakes.most of the time It has been loss of oil or engine knocking then needed to rebuild the engine which I had to pay $4000. Im sad and upset that most of the time I have had my car it has been in the shop or having to be parked for a length of time.( avg. 3-20 days) was called back to say it was another issue.Took to another dealer who repaired . had to take in for repeat engine issues and knocking sounds the wasn’t “reproduced” it was clearly heard when manager drove it but service provider said no. So frustrated that I have spend a lot of money for engine issues and haven’t had a chance to enjoy the vehicle, frustrated it is performed less than what I expected.have never taken my car to any other but dealership and kept up with maintenance. the rest was slow to accelerate(even after just picking up from dealership) a lot of knocking .Engine was “rebuilt” and It’s still in the shop today. Driving without oil loss notification.Now radiator hose is swollen/soft at top unsure if oil or water. And I need to pay for hose $400 now another $1000? braking feels unusual after they replaced. I notified KIA customer support/emailed all receipts and return call was told no recalls about a year ago and she would call dealership. Car was at dealership for a while at that time.

Filed Oct 2, 2025 · Airbags · FL

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 the federal safety agency 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