Some more reports from NHTSA:
January 11, 2018 NHTSA ID NUMBER: 11062161
Components: UNKNOWN OR OTHER
NHTSA ID Number: 11062161
Incident Date January 10, 2018
Consumer Location MADISON, MS
Vehicle Identification Number KNALN4D76E5****
Summary of Complaint
THE FRONT GLASS ROOF PANEL/SUNROOF EXPLODED WITH NO EVIDENCE OF ANY OUTSIDE FORCE OR FACTOR. CAR IS A 2014 KIA CADENZA PURCHASED USED IN 2017 WITH 10,000 MILES. MILEAGE AT TIME OF INCIDENT WAS 17,629. NO RELEVANT MAINTENANCE HISTORY ASSOCIATED WITH THE INCIDENT. I WAS DRIVING THE VEHICLE IN RIDGELAND, MS SOUTHBOUND ON A FRONTAGE ROAD OFF OF I-55 AT 6:20 PM CST AT A SPEED OF APPROXIMATELY 55 MILES PER HOUR IN DRIVE AS THE VEHICLE HAS AN AUTOMATIC TRANSMISSION. IT HAD BEEN AN OVERCAST DAY AND AT THE TIME OF THE INCIDENT IT WAS NOT RAINING AND THE TEMPERATURE WAS NEAR 60 DEGREES. THERE WERE NO CARS ON EITHER SIDE OF ME NOR IN FRONT OF ME FOR A REASONABLE DISTANCE. AS I WAS DRIVING, THERE WAS AN EXTREMELY LOUD EXPLOSION WHICH SOUNDED AS IF A GUN HAD BEEN DISCHARGED IN OR NEAR MY CAR. I WAS EXTREMELY STARTLED BY THE EXPLOSION AND IMMEDIATELY HEARD OUTSIDE NOISE AND FELT AIR COMING IN FROM THE TOP OF THE CAR. I SLOWED AND ENGAGED MY HAZARDS UNTIL I COULD GET TO A LOCATION TO INSPECT THE CAR. I NOTICED AN INTERESTING SMELL DIRECTLY AFTER THE INCIDENT BUT COULD NOT DETERMINE WHERE IT WAS COMING FROM AND IT DISSIPATED. ONCE I PARKED THE CAR IT WAS AS EXPECTED, THE FRONT SECTION OF THE ROOF GLASS HAD A LARGE HOLE WITH GLASS SHARDS AND THE REMAINDER OF THE FRONT SECTION OF GLASS WAS CRACKED BUT HAD NOT DISLODGED. THE REAR GLASS SECTION APPEARED TO BE UNHARMED. THREE WORK EMPLOYEES AS WELL AS MY WIFE WITNESSED THE DAMAGE DIRECTLY AFTER I PARKED. THIS WAS A TRIP I HAD MADE NUMEROUS TIMES WITH NO UNUSUAL ROAD CONDITIONS, TRAFFIC OR WEATHER IN THIS CASE.
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February 5, 2018 NHTSA ID NUMBER: 11066923
Components: STRUCTURE
NHTSA ID Number: 11066923
Incident Date January 31, 2018
Consumer Location WINTER GARDEN, FL
Vehicle Identification Number KNALN4D79F5****
Summary of Complaint
WHEN I AM DRIVING HOME JUST A MILE AWAY FROM HOME I HEARD A POP NOISE SIMILAR TO A BALLOON AND MY KIDS WITH ME AND I ASKED THEM DID THEY HAVE ANY BALLOONS WITH YOU ALL . THEY SAY NO AND HEARD THE SAME NOISE AND I WAS THINKING MAY BE THE TIRE POPPED BUT I DIDN'T FEEL ANYTHING IN MY STEERING WHEEL . THEN I STARTED HEARING WIND NOISE COMING INTO THE CAR. THEN I REALIZED THE SUNROOF MUST HAVE EXPLODED. I GOT TO MY HOUSE AND GOT OUT CHECK IT OUT FIND ITS STARTING CRACK ALL OVER THE FRONT MOON ROOF. I COULD HEAR IT'S SLOWLY CRACKING WITH SUEAKY NOISE WITH PRESSURE AND ITS LIFTING SLIGHTLY OVER ITSELF. WE ARE SAFELY CONE OUT OF THE CAR BEFORE THE GLASS CAME DOWN.I HAVE HEARD SIMILAR PROBLEMS WITH KIA SORENTO BUT NEVER WITH CADENZAS.NOW I SEE THE PROBLEM OF USING TEMPERED GLASS IT SEEMS VERY DANGEROUS THEY ARE VERY SHARP. I CONTACTED KIA AND THEY SAID WILL CALL BACK IN 2 DAYS AND THEY CALLED BACK BUT I COULD COULDN'T PICK UP, NO ONE ANSWER MY RETURN CALL I AM WAITING FOR 4 DAYS NOW FOR A SOLUTION TO THIS.
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February 22, 2018 NHTSA ID NUMBER: 11074369
Components: UNKNOWN OR OTHER
NHTSA ID Number: 11074369
Incident Date February 22, 2018
Consumer Location MISSOURI CITY, TX
Vehicle Identification Number KNALN4D76E5****
Summary of Complaint
MOONROOF EXPLODED FOR NO OBVIOUS REASON WHILST DRIVING AT HIGHWAY SPEEDS
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July 30, 2018 NHTSA ID NUMBER: 11114680
Components: UNKNOWN OR OTHER
NHTSA ID Number: 11114680
Incident Date July 27, 2018
Consumer Location ENGLEWOOD CLIFFS, NJ
Vehicle Identification Number N/A
Summary of Complaint
WAS DRIVING DOWN A BUSY LOCAL ROAD WHEN OUT OF NO WHERE, I HEARD A LOUND EXPLOSION. I LOOKED AT THE REAR VIEW MIRROR THINKING SOMETHING HAD CRASHED INTO THE BACK WINDSHIELD, BUT THERE WAS NOTHING. I GOT OUT TO CHECK THE CAR AND NOTICED A HUGE HOLE IN MY SUNROOF. THE GLASS HAD SHATTERED AND PIECES WERE EVERYWHERE. I CALLED KIA TO SEE IF IT WOULD BE COVERED UNDER WARRANTY, BUT THEY TOLD ME THAT THEY'VE NEVER COME ACROSS SOMETHING LIKE THIS. I EVEN SHOWED THEM MANY SOURCES ONLINE OF PEOPLE COMPLAINING ABOUT THE SAME EXACT ISSUE AND THEY STILL FAILED TO ACKNOWLEDGE THE DEFECT. IT WAS CLEARLY DUE TO TOO MUCH PRESSURE FROM HOW THE CAR WAS DESIGNED AND BUILT AS THE SUNROOF WAS CONCAVING UPWARDS. CLEARLY A SAFETY HAZARD WHILE DRIVING DUE TO THE LOUD, UNEXPECTED EXPLODING SOUND AND WORST CASE, COULD'VE CAUSED INJURY WITH GLASS FALLING EVERYWHERE HAD MY SUNROOF BEEN ACTUALLY OPEN.
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September 20, 2018 NHTSA ID NUMBER: 11130448
Components: UNKNOWN OR OTHER
NHTSA ID Number: 11130448
Incident Date September 18, 2018
Consumer Location COLORADO SPRINGS, CO
Vehicle Identification Number KNALN4D78E5****
Summary of Complaint
WHILE DRIVING ON 9/18 NORTHBOUND ON I-25 AT 75 MPH OUTSIDE CASTLE ROCK. CO, MY SUNROOF EXPLODED. GLASS RAINED DOWN ON ME. THERE WERE NO OTHER CARS AROUND ME AT THE TIME AND THERE IS NO OTHER DAMAGE TO MY CAR. THERE IS NO OBJECT IN THE CAR THAT WOULD INDICATE THE SUNROOF WAS HIT BY SOMETHING.
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Interestingly there are no reports of exploding sunroofs on the '17-19 MY Cadenza's