NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
47 reports46,052 miles · Apr 9, 2009
Engine And Engine Cooling
I'M A SINGLE MOM AND HAVE NO FAMILY HERE IN CT. TO HELP ME OR GUIDE ME IN THIS SORT OF THING. MY CAR STARTED MAKING A KNOCKING NOISE UNDER THE HOOD. I DIDN'T KNOW WHAT IT WAS SO I TOOK IT TO MY MECHANIC. IT TOOK A COUPLE OF DAYS BEFORE SOME ONE THERE COULD LOOK AT IT. HE TOLD ME IT WAS AN ENGINE KNOCK AND SAID I SHOULD TAKE …
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I'M A SINGLE MOM AND HAVE NO FAMILY HERE IN CT. TO HELP ME OR GUIDE ME IN THIS SORT OF THING. MY CAR STARTED MAKING A KNOCKING NOISE UNDER THE HOOD. I DIDN'T KNOW WHAT IT WAS SO I TOOK IT TO MY MECHANIC. IT TOOK A COUPLE OF DAYS BEFORE SOME ONE THERE COULD LOOK AT IT. HE TOLD ME IT WAS AN ENGINE KNOCK AND SAID I SHOULD TAKE IT BACK TO THE DEALERSHIP TO GET IT FIXED. BY THE TIME I CONTACTED KEY IN MILFORD CT, MY CAR WAS OUT OF WARRANTY BY EIGHT DAYS. AND THAT'S ALL THEY KEPT TELLING ME. KEEP IN MIND, I BROUGHT THE CAR TO MY MECHANIC THE DAY BEFORE THE WARRANTY EXPIRED. KEY CHARGED ME 105.00 TO DETERMINE IT WAS IN FACT AN ENGINE KNOCK,AFTER I TOLD THEM MY MECHANIC TOLD ME WHAT IT WAS. KEY HAD NO LOANER CAR TO LEND ME WHILE MY CAR WAS THERE. LATER I FOUND OUT THERE WAS A WAITING LIST FOR LOANERS. NO ONE OFFERED TO PUT ME ON THE LIST AND NO ONE TRIED HELPING ME WITH A RENTAL. I PAID FOR A RENTAL THE ENTIRE WEEK THEY WERE PLAYING GAMES WITH ME WANTING TO CHARGE ME 10,360.00 FOR A NEW ENGINE AND WANTED TO CHARGE ME AN EXTRA 380.00 TO FIND OUT WHAT EXACTLY WENT WRONG WITH THE ENGINE, BEFORE THEY DECIDE TO REPLACE IT. NO ONE IS GIVING ME ANY GUARANTEE THAT THE WARRANTY WILL BE GRANTED. I BOUGHT MY CAR THERE 9/15/06 HAD MY CAR FOR THREE YRS,IT'S A 2004 XG350 WITH 46000 MILES ON IT. IT SOUNDS TO ME LIKE THE ENGINE HAD A DEFECT. EVERYONE ELSE I SPOKE WITH SAID THE SAME THING. I CONTACTED THE MANUFACTURE COMPANY AND NO ONE WAS TRYING TO HELP ME. I TOOK MY CAR OUT OF KEY AND BROUGHT IT BACK TO MY MECHANIC TO HAVE THE ENGINE REPLACED. I AM LOOKING FOR SOME SORT OF REIMBURSEMENT FROM KEY FOR ALL THESE GAMES THEY WANT TO PUT ME THROUGH, TRYING TO RIP ME OFF. MY CAR WAS IN FACT IN THE SHOP THE DAY BEFORE THE WARRANTY RAN OUT, MARCH 14, 2009. I HAVE ALL OF MY MAINTENANCE RECEIPTS AND RECORDS. KEY CHECKED ALL OF THE CARS FLUIDS AND EVERYTHING WAS CLEAN. I DON'T THINK ENGINES GO BAD OVER NIGHT. CAN SOME ONE HELP ME? *TR
NHTSA ODI #10264790
1,000 miles · May 24, 2008
Air BagsSeat Belts
I HAVE A HYUNDAI XG350 2004 MODEL. I HAVE HAD IT IN FOR SERVICE WITH THE AIR BAG LIGHT 10 TIMES. THEY HAVE REPLACED THE SEAT BELT, SEAT BASE SENSOR, SEAT BACK ASSEMBLY AND THE STEERING WHEEL CLOCK SPRING. DO YOU THINK IT IS SAFE TO DRIVE, WILL IT DEPLOY IN CASE OF A CRASH? *TR
NHTSA ODI #10228823
42,000 miles · Feb 12, 2008
Vehicle Speed ControlCrash
TL*THE CONTACT OWNS A 2004 HYUNDAI XG 350. WHEN THE CONTACT DEPRESSED THE BRAKE PEDAL, THE VEHICLE ACCELERATED. AS A RESULT, THE CONTACT STRUCK ANOTHER VEHICLE, WHICH CAUSED MINOR DAMAGE. THE FAILURE OCCURRED AT LEAST FIVE TIMES. THE CONTACT HAS NOT NOTIFIED THE DEALER OR MANUFACTURER. THE SPEED AND TRANSMISSION TYPE WERE U…
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TL*THE CONTACT OWNS A 2004 HYUNDAI XG 350. WHEN THE CONTACT DEPRESSED THE BRAKE PEDAL, THE VEHICLE ACCELERATED. AS A RESULT, THE CONTACT STRUCK ANOTHER VEHICLE, WHICH CAUSED MINOR DAMAGE. THE FAILURE OCCURRED AT LEAST FIVE TIMES. THE CONTACT HAS NOT NOTIFIED THE DEALER OR MANUFACTURER. THE SPEED AND TRANSMISSION TYPE WERE UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 42,000. UPDATED 03-18-08 *BF UPDATED 03/18/08 *TR
NHTSA ODI #10217825
10,000 miles · Oct 19, 2007
Electrical System
TL*THE CONTACT OWNS A 2004 HYUNDAI XG 350. DURING THE DAYTIME, THE CONTACT CANNOT SEE THE LED SCREEN DISPLAY. EVEN WHEN THE DIMMER WAS ADJUSTED, THE FUNCTIONS WERE STILL NOT VISIBLE. THE LED SCREEN HAS THE TEMPERATURE AND VENT CONTROL. THE DEALER STATED THAT THE VEHICLE WAS DESIGNED IN THAT MANNER. THE FAILURE MILEAGE WAS 1…
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TL*THE CONTACT OWNS A 2004 HYUNDAI XG 350. DURING THE DAYTIME, THE CONTACT CANNOT SEE THE LED SCREEN DISPLAY. EVEN WHEN THE DIMMER WAS ADJUSTED, THE FUNCTIONS WERE STILL NOT VISIBLE. THE LED SCREEN HAS THE TEMPERATURE AND VENT CONTROL. THE DEALER STATED THAT THE VEHICLE WAS DESIGNED IN THAT MANNER. THE FAILURE MILEAGE WAS 10,000 AND CURRENT MILEAGE WAS 26,000.
NHTSA ODI #10206362
75,000 miles · Nov 8, 2006
Suspension
DT*: THE CONTACT STATED THE DRIVER SIDE TIRES WORE OUT EVERY 12,000 MILES AND NEEDED TO BE REPLACED. THE DEALERSHIP DETERMINED THE ALIGNMENT COULD NOT BE ADJUSTED. UPDATED 11/30/2006 - THE VEHICLE WAS TAKEN T O AN INDEPENDENT REPAIR FACILITY AND HAD ADJUSTABLE CASTER AND CAMBER BALL JOINTS INSTALLED TO ALIGN THE FRONT END PROP…
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DT*: THE CONTACT STATED THE DRIVER SIDE TIRES WORE OUT EVERY 12,000 MILES AND NEEDED TO BE REPLACED. THE DEALERSHIP DETERMINED THE ALIGNMENT COULD NOT BE ADJUSTED. UPDATED 11/30/2006 - THE VEHICLE WAS TAKEN T O AN INDEPENDENT REPAIR FACILITY AND HAD ADJUSTABLE CASTER AND CAMBER BALL JOINTS INSTALLED TO ALIGN THE FRONT END PROPERLY. THE CONSUMER HAS HAD NO FURTHER PROBLEMS. . *NM
NHTSA ODI #10172962
66,954 miles · Nov 1, 2006
Engine And Engine Cooling
DT*: THE CONTACT STATED WHILE TRAVELING VARIOUS SPEEDS, THE CHECK ENGINE LIGHT ILLUMINATED 6 DIFFERENT TIMES. THE VEHICLE WAS TAKEN TO THE DEALER ON 6 OCCASIONS, BUT THE PROBLEM COULD NOT BE DETERMINED. ON ONE VISIT, THE PCV VALVE WAS REPLACED, BUT THE PROBLEM PERSISTED. ON THE OTHER 5 VISITS, THE VEHICLE'S CODES WERE RESET, …
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DT*: THE CONTACT STATED WHILE TRAVELING VARIOUS SPEEDS, THE CHECK ENGINE LIGHT ILLUMINATED 6 DIFFERENT TIMES. THE VEHICLE WAS TAKEN TO THE DEALER ON 6 OCCASIONS, BUT THE PROBLEM COULD NOT BE DETERMINED. ON ONE VISIT, THE PCV VALVE WAS REPLACED, BUT THE PROBLEM PERSISTED. ON THE OTHER 5 VISITS, THE VEHICLE'S CODES WERE RESET, BUT THE PROBLEM PERSISTED.
NHTSA ODI #10172328
24,800 miles · May 12, 2006
Engine And Engine CoolingFuel System, Gasoline
DT*: THE CONTACT STATED THE VEHICLE INTERMITTENTLY LOST POWER WHILE DRIVING AT SPEEDS ABOVE 40MPH. THE VEHICLE RESUMED POWER AFTER BROUGHT TO A STOP. THE ONLY WARNING INDICATOR IS THE TCS LIGHT FLASHING DURING THE REDUCTION OF SPEED. THE VEHICLE WAS TAKEN TO A SERVICE DEALER TWO MONTHS AGO AND THE DEALER REPLACED THE FUEL PU…
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DT*: THE CONTACT STATED THE VEHICLE INTERMITTENTLY LOST POWER WHILE DRIVING AT SPEEDS ABOVE 40MPH. THE VEHICLE RESUMED POWER AFTER BROUGHT TO A STOP. THE ONLY WARNING INDICATOR IS THE TCS LIGHT FLASHING DURING THE REDUCTION OF SPEED. THE VEHICLE WAS TAKEN TO A SERVICE DEALER TWO MONTHS AGO AND THE DEALER REPLACED THE FUEL PUMP, FILTER AND LINES. THE PROBLEM BECAME WORSE AND THE VEHICLE WAS RETURNED TO THE DEALER WHO RECOMMENDED GETTING A WHEEL ALIGNMENT AND TIRE ROTATION. THIS WAS COMPLETED AT AN INDEPENDENT REPAIR SHOP, BUT THE PROBLEM CONTINUES. THE VEHICLE HAS NOT BEEN RETURNED TO THE DEALER FOR FURTHER INSPECTION.
NHTSA ODI #10157426
3,629 miles · Apr 20, 2006
Vehicle Speed ControlCrash
WHEN SLOWING DOWN AND BRAKING THE CAR ACCELERATED ON ITS OWN. THE FIRST TIME I HIT THE CAR IN FRONT OF ME . I HAD TO TURN THE KEY OFF TO GET IT TO STOP. I HAD BUMPER DAMAGE. HAVE HAD THE CAR IN 5 TIMES FOR THIS SAME PROBLEM. EACH TIME THE DEALER SAID THEY CAN FIND NOTHING WRONG. THE LAST TIME THE FACTORY REP CHECKED IT AND SAI…
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WHEN SLOWING DOWN AND BRAKING THE CAR ACCELERATED ON ITS OWN. THE FIRST TIME I HIT THE CAR IN FRONT OF ME . I HAD TO TURN THE KEY OFF TO GET IT TO STOP. I HAD BUMPER DAMAGE. HAVE HAD THE CAR IN 5 TIMES FOR THIS SAME PROBLEM. EACH TIME THE DEALER SAID THEY CAN FIND NOTHING WRONG. THE LAST TIME THE FACTORY REP CHECKED IT AND SAID HE COULD DO NOTHING BECAUSE IT WOULD NOT DO IT THEN. AS OF 4/20/06 THIS CAR HAS DONE THIS 8 TIMES. IT IS LIKE DRIVING A TIME BOMB. *NM
NHTSA ODI #10155765
50 miles · Apr 10, 2006
SuspensionFire
DT*: THE CONTACT STATED WHILE DRIVING 20MPH, THE RIGHT FRONT TIRE WELL ERUPTED IN FLAMES. THE CONTACT PULLED OVER AND REMOVED THE PASSENGERS FROM THE VEHICLE. BYSTANDERS TRIED TO PUT THE FIRE OUT WITH A FIRE EXTINGUISHER; HOWEVER, THE FIRE DEPARTMENT ARRIVED TO PUT OUT THE FIRE. THE VEHICLE WAS TOWED TO THE DEALER FOR INSPEC…
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DT*: THE CONTACT STATED WHILE DRIVING 20MPH, THE RIGHT FRONT TIRE WELL ERUPTED IN FLAMES. THE CONTACT PULLED OVER AND REMOVED THE PASSENGERS FROM THE VEHICLE. BYSTANDERS TRIED TO PUT THE FIRE OUT WITH A FIRE EXTINGUISHER; HOWEVER, THE FIRE DEPARTMENT ARRIVED TO PUT OUT THE FIRE. THE VEHICLE WAS TOWED TO THE DEALER FOR INSPECTION. THE DEALER DETERMINED THE FRONT AXEL FRACTURED. THE VEHICLE PREVIOUSLY HAD THE SAME PROBLEM WITH THE AXEL 9 OTHER TIMES. THE VEHICLE IS CURRENTLY UNDERGOING ADDITIONAL INSPECTION BY THE DEALER.
NHTSA ODI #10154952
4,000 miles · Apr 4, 2006
Equipment
AM RADIO RECEPTION BECAME VERY WEAK WHEN MY 2004 XG350L WAS ABOUT 16 MONTHS OLD. ONE DAY, THERE WAS NOTICEABLY MORE STATIC ON ALL BUT THE 2 STRONGEST STATIONS, COMPARED WITH ALL THE PREVIOUS DAYS. I LIVE IN A METROPOLITAN AREA, AND THERE ARE PLENTY OF STATIONS WITH A STRONG ENOUGH SIGNAL TO GET CLEAR RECEPTION ON MY WIFE'S CAR…
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AM RADIO RECEPTION BECAME VERY WEAK WHEN MY 2004 XG350L WAS ABOUT 16 MONTHS OLD. ONE DAY, THERE WAS NOTICEABLY MORE STATIC ON ALL BUT THE 2 STRONGEST STATIONS, COMPARED WITH ALL THE PREVIOUS DAYS. I LIVE IN A METROPOLITAN AREA, AND THERE ARE PLENTY OF STATIONS WITH A STRONG ENOUGH SIGNAL TO GET CLEAR RECEPTION ON MY WIFE'S CAR, AND MY PREVIOUS CAR, CIRCA 1992. I AM SCHEDULING AN APPOINTMENT TO HAVE THE DEALER LOOK AT IT. *JB
NHTSA ODI #10154492