Total Complaints
7 filings
KIA CADENZA · model year
7 NHTSA complaints, and 1 active recall for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2018KIACADENZA carries 7 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. For crash performance, NHTSA's New Car Assessment Program gave this cohort an overall Not Rated/5 rating, with Not Rated/5 front crash, Not Rated/5 side crash, and Not Rated/5 rollover scores derived from standardized barrier and dynamic tests.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2018 CADENZA is engine with 5 filings, followed by unknown or other (2). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 1 active recall campaign, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.
NHTSA currently has 38 investigation files overlapping the 2018 CADENZA, and 1 remain open. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
7 filings
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| ENGINE | 5 |
| UNKNOWN OR OTHER | 2 |
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
Kia Motors America (Kia) is recalling certain 2017-2021 Sportage and Cadenza vehicles. The electrical circuit in the Hydraulic Electronic Control Unit (HECU) may short-circuit, which can cause a fire in the engine compartment.
Complete engine failure due to rods and bearings (same as all other Kia engine recalls currently active). Ironically my car wasnât included in the recall. Also Iâve noticed that Hyundai has extended the warranty for this same engine in the 2018 Santa Fe basically acknowledging it has a problem but didnât include the 2018 Kia cadenza which has the EXACT SAME ENGINE. Now I have engine failure prematurely and they are trying to deny repairs. Also was never notified of the KSDS âupgradeâ before engine failed only after and it had been to a Kia dealer for fuel pipe repair just recently in which they could have installed it before engine failure.
No prior issues/light on dashboard as the car was just serviced for coolant hose replacement. On my way home from work, the car stalled and loss power at the light. The signs were giving engine failure due to losing power then a clicking/ticking noise. After pulling over and giving the car a break I tried to restart it, at that point the noise had change from the clicking to a weird knocking noise. I had the car towed to my trusted mechanic shop. He advised me that the engine indeed did fail and that it would need to be replaced. Verbatim he said: âThe diagnosis is that the noise is an internal engine failure, rod bearing and connecting rods.â This was a major safety concern because the engine could have caught fire during that short drive I had home risking my life and surrounding vehicles. Aware of the Kia engine recalls already, I called Kia just for them to tell me itâs not on their recall list so itâs going to be an out of pocket repair. I asked if there was a way for i
Vehicle has been properly maintained and at 78k miles, while at a stop sign, the engine seized. No warning signs from vehicle appeared.
Failure of Oil Pressure Sensor resulting in oil leaking into wiring harness, this is the same problem with 3.3L engines in other models that KIA has extended coverage. I contacted KIA Customer Care and was told they tracked VIN and not enough Cadenzas had reported the same repair. If the problem is with the engine sensor then it should apply regardless of vehicle it was installed.
I PURCHASED A NEW 2018 KIA CADENZA WITH 11 MILES ON IT. I HAVE HAD THE CAR LESS THAN A YEAR AND IT RANDOMLY STALLS WHILE IN DRIVE MODE IN MOTION AND SOMETIMES WHILE SITTING IDLE. IT HAS STALLED ON THE FREEWAY, NEIGHBORHOOD STREETS, DRIVE-WAY AND ON FEEDER ROADS. THE CAR HAS BEEN IN AND OUT OF THE DEALERSHIP AT LEAST 5 TIMES. KIA MOTORS CANNOT FIGURE OUT WHAT'S WRONG WITH THE VEHICLE. THEY PLACED A TRACKER IN THE VEHICLE AND DETERMINED THE CRANK SENSOR WAS MALFUNCTIONING. THEY REPLACED THE CRANK SENSOR, I PICKED THE VEHICLE UP AND LESS THAN 24 HOURS LATER THE CAR STALLED AGAIN. IT STALLED 2 ADDITIONAL TIMES BEFORE RETURNING IT TO THE SHOP AGAIN THIS PAST WEEK.
Mileage: 9,500
I PURCHASED A NEW 2018 KIA CADENZA WITH 11 MILES ON IT. I HAVE HAD THE CAR LESS THAN A YEAR AND IT RANDOMLY STALLS WHILE IN DRIVE MODE IN MOTION AND SOMETIMES WHILE SITTING IDLE. IT HAS STALLED ON THE FREEWAY, NEIGHBORHOOD STREETS, DRIVE-WAY AND ON FEEDER ROADS. THE CAR HAS BEEN IN AND OUT OF THE DEALERSHIP AT LEAST 5 TIMES. KIA MOTORS CANNOT FIGURE OUT WHAT'S WRONG WITH THE VEHICLE. THEY PLACED A TRACKER IN THE VEHICLE AND DETERMINED THE CRANK SENSOR WAS MALFUNCTIONING. THEY REPLACED THE CRANK SENSOR, I PICKED THE VEHICLE UP AND LESS THAN 24 HOURS LATER THE CAR STALLED AGAIN. IT STALLED 2 ADDITIONAL TIMES BEFORE RETURNING IT TO THE SHOP AGAIN THIS PAST WEEK.
Mileage: 9,500
WE BECAME MORE CONCERNED AFTER SEEING A REPORT ABOUT FIRES INVOLVING KIAS THIS MORNING. OUR NEW 2018 KIA CADENZA HAD ABOUT 1,750 MILES ON THE ODOMETER ON OCTOBER 11, 2018, WHEN THE FOLLOWING OCCURRED: WE WERE ON A CITY STREET, STOPPED AT A STOP LIGHT, WHEN WE SAW SOME SMALL, LIGHT STRANDS OF SMOKE THAT SEEMED TO BE RISING JUST OUTSIDE THE RIGHT, FRONT FENDER. WE PULLED INTO A NEARBY PARKING LOT & CHECKED UNDER THE HOOD. THERE WAS A SMELL. IT SEEMED LIKE SOMETHING HOT OR SCORCHED (RUBBER OR OIL RELATED??), BUT NO SMOKE OR LEAKS WERE NOTICEABLE. IT DID SEEM LIKE THERE WERE SMALL SPOTS, SCATTERED ON THE UPPER SURFACES TO THE RIGHT OF THE ENGINE. AFTER PARKING IN OUR GARAGE AT HOME, THE SMELL BECAME VERY STRONG & REMAINED THAT WAY IN THE CLOSED GARAGE. WE DID NOT CHECK TO SEE HOW LONG THE SMELL REMAINED STRONG, BUT IT WAS STILL VERY NOTICEABLE WHEN I RETURNED 10 OR 15 MINUTES LATER. YESTERDAY, ON 10/12/18, WE BROUGHT THE VEHICLE TO THE KIA GARAGE & REPORTED THIS. THE SERVICE ADV
Mileage: 1,750
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.