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2009 Hyundai Sonata

Owner reports · Recalls · Investigations

More warning signs than most Sonata years

Owner complaints for the 2009 Hyundai Sonata are substantially higher than the model-year median of 161.

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When problems were reported

Mileage at the reported incident

375 reports with mileage · 85 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Service Brakes. Review the 64 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 61 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 56 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

21 crash reports11 fire reports20 injury reports

Service Brakes complaints

64 reports
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126,000 miles · Oct 9, 2016
Service Brakes

A FEW MILE FROM HOME ON RURAL HIGHWAY DRIVERS SIDE REAR BRAKES SUDDENLY SEIZED LURCHING THE VEHICLE, TRANSMISSION DOWN SHIFTED, ENGINE RPM WENT WAY UP. UPON ARRIVING AT HOME, BRAKES WERE SMOKING HOT AND ON INSPECTION BRAKE PADS AND METAL ALMOST GONE, ROTOR HAD THINNED TO 1/4 ", AND METAL POWDER WAS ALL OVER THE RIM, SIDE AND REA…

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A FEW MILE FROM HOME ON RURAL HIGHWAY DRIVERS SIDE REAR BRAKES SUDDENLY SEIZED LURCHING THE VEHICLE, TRANSMISSION DOWN SHIFTED, ENGINE RPM WENT WAY UP. UPON ARRIVING AT HOME, BRAKES WERE SMOKING HOT AND ON INSPECTION BRAKE PADS AND METAL ALMOST GONE, ROTOR HAD THINNED TO 1/4 ", AND METAL POWDER WAS ALL OVER THE RIM, SIDE AND REAR OF CAR.

NHTSA ODI #10914932

20,000 miles · Jun 14, 2016
Power TrainService Brakes

TL* THE CONTACT OWNS A 2009 HYUNDAI SONATA. THE CONTACT STATED THAT WHILE DRIVING AT 10 MPH, THE BRAKE PEDAL WAS DEPRESSED AND A GRINDING NOISE EMITTED AS THE ESC WARNING LIGHT ILLUMINATED. THE FAILURE RECURRED NUMEROUS TIMES. THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 13V113000 (EXTERIOR LIGHTING SERVICE BRAKES, HYDR…

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TL* THE CONTACT OWNS A 2009 HYUNDAI SONATA. THE CONTACT STATED THAT WHILE DRIVING AT 10 MPH, THE BRAKE PEDAL WAS DEPRESSED AND A GRINDING NOISE EMITTED AS THE ESC WARNING LIGHT ILLUMINATED. THE FAILURE RECURRED NUMEROUS TIMES. THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 13V113000 (EXTERIOR LIGHTING SERVICE BRAKES, HYDRAULIC ). ON A SEPARATE OCCASION, THE GEAR LEVER FAILED TO SHIFT OUT OF PARK UNTIL AFTER SEVERAL ATTEMPTS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 20,000. THE VIN WAS NOT AVAILABLE.

NHTSA ODI #10874148

Mileage unknown · Apr 7, 2016
Service Brakes

HAD TO REPLACE BRAKES TWICE. AFTER READING 200 COMPLAINTS ONLINE, I HAVE DISCOVERED IT IS AN ONGOING PROBLEM WITH ALL SONATAS. THE NEW BRAKES HAVE TO BE GROUND DOWN TO FIT THE SONATA.

NHTSA ODI #10854193

90,000 miles · Feb 29, 2016
Service Brakes

THE REAR BRAKE CALIPERS APPEAR TO BE DEFECTIVE IN THAT A HIGH PERCENTAGE SEEM TO FAIL. THIS IS THE SECOND CALIPER THAT HAS REQUIRED REPAIR/REPLACEMENT, WHICH NECESSARILY ALSO REQUIRES REPLACEMENT OF BRAKE PADS AND ROTORS. IT APPEARS THAT THE CALIPERS STICK IN THE EXTENDED POSITION CAUSING (IN THE BEST CASE) THE RAPID WEAR OF T…

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THE REAR BRAKE CALIPERS APPEAR TO BE DEFECTIVE IN THAT A HIGH PERCENTAGE SEEM TO FAIL. THIS IS THE SECOND CALIPER THAT HAS REQUIRED REPAIR/REPLACEMENT, WHICH NECESSARILY ALSO REQUIRES REPLACEMENT OF BRAKE PADS AND ROTORS. IT APPEARS THAT THE CALIPERS STICK IN THE EXTENDED POSITION CAUSING (IN THE BEST CASE) THE RAPID WEAR OF THE ROTORS AND CALIPERS, AND (IN THE WORST CASE) A HEAT BUILD UP, AND A FAILURE OF THE BRAKES. INTERNET BLOGS INDICATE THAT THIS IS NOT JUST A PROBLEM WITH MY VEHICLE BUT IS SYSTEMIC WITH HYUNDAI SONATAS, AND PARTICULARLY 2009 AND LATER. I WILL NOTE THAT HYUNDAI HAD A BRAKE RECALL REGARDING CALIPERS FOR SONATAS BETWEEN 2011 AND 2014, BUT THAT IT DID NOT EXTEND TO THE 2009 SONATAS.

NHTSA ODI #10839039

65,000 miles · Feb 22, 2016
Service BrakesWheels

IN FEBRUARY OF 2015, LESS THAN 2 MONTHS AFTER I PURCHASED THIS VEHICLE USED, I NOTICED THE LEFT REAR TIRE WAS SCREECHING WHEN IN MOTION LIKE A BELT IN THE ENGINE WOULD. I TOOK IT TO A HYUNDAI DEALERSHIP WHERE THEY MADE ME AWARE THAT THE CALIPER HAD LOCKED UP AND NEEDED TO BE COMPLETELY REPLACED & REPAIRED ALONG WITH A BRAND NEW …

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IN FEBRUARY OF 2015, LESS THAN 2 MONTHS AFTER I PURCHASED THIS VEHICLE USED, I NOTICED THE LEFT REAR TIRE WAS SCREECHING WHEN IN MOTION LIKE A BELT IN THE ENGINE WOULD. I TOOK IT TO A HYUNDAI DEALERSHIP WHERE THEY MADE ME AWARE THAT THE CALIPER HAD LOCKED UP AND NEEDED TO BE COMPLETELY REPLACED & REPAIRED ALONG WITH A BRAND NEW ROTOR. I FIGURED THIS WAS JUST A ONE TIME ISSUE, UNTIL JUST THIS MONTH (FEBRUARY OF 2016) LESS THAN A YEAR AFTER REPAIRING THE CALIPER AND BRAKE SYSTEM IN THE LEFT REAR TIRE, A STRONG BURNING SMELL WAS APPEARING PERIODICALLY FROM THE RIGHT REAR TIRE AFTER ANY DRIVE. TOOK THE CAR TO THE SAME HYUNDAI DEALERSHIP WHO MADE ME AWARE THAT THE CALIPER WAS NOW LOCKED UP IN THE RIGHT REAR TIRE AND NEEDED TO BE COMPLETELY REPLACED AND REPAIRED. IN BOTH CIRCUMSTANCES I WAS TOLD THAT THE VEHICLE WAS ABSOLUTELY UNSAFE TO DRIVE OFF THEIR LOT AND HAD TO GET A RENTAL CAR TO LEAVE THE CAR FOR REPAIRS. I DID MY RESEARCH... APPARENTLY THIS SAME MAKE/MODEL/YEAR HAS GIVEN LOTS OF PEOPLE THE SAME ISSUES.. BUT NO RECALL HAS BEEN MADE. THIS IS INCREDIBLY DANGEROUS AND IN BOTH CIRCUMSTANCES I WAS DRIVING THE CAR WITH MY CAR SEAT AGED TODDLER IN THE BACK SEAT. PLEASE HELP ME GET TO THE BOTTOM OF THIS!!

NHTSA ODI #10837541

80,000 miles · Feb 16, 2016
Service Brakes

I HAVE A MAJOR PROBLEM WITH MY BRAKES. WHILE DRIVING THEY WILL SUDDENLY GO OUT. I HAVE TO PRESS THE PEDAL ALMOST TO THE FLOOR TO TRY AND STOP THE CAR. MY CAR WAS REPAIRED IN SEPTEMBER 2015, NOVEMBER 2015, DECEMBER 2015 AND MY BRAKES WENT OUT AGAIN ON YESTERDAY, FEBRUARY 15, 2016 WHILE ON THE HIGHWAY. THIS IS A SERIOUS PROBLEM AN…

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I HAVE A MAJOR PROBLEM WITH MY BRAKES. WHILE DRIVING THEY WILL SUDDENLY GO OUT. I HAVE TO PRESS THE PEDAL ALMOST TO THE FLOOR TO TRY AND STOP THE CAR. MY CAR WAS REPAIRED IN SEPTEMBER 2015, NOVEMBER 2015, DECEMBER 2015 AND MY BRAKES WENT OUT AGAIN ON YESTERDAY, FEBRUARY 15, 2016 WHILE ON THE HIGHWAY. THIS IS A SERIOUS PROBLEM AND COULD END UP BEING A DEADLY PROBLEM.

NHTSA ODI #10836360

114,400 miles · Jan 20, 2016
Service Brakes

THE CAR HAS HAD FOUR REAR CALIPER FAILURES. THESE CALIPER FAILURES HAVE ALSO CONSUMED THREE SETS OF REAR BRAKE PADS AND TWO SETS OF REAR ROTORS. THE FAILURE APPEARS TO BE AN EXCESSIVE WEAR/SLOW TO RELEASE CONDITION THAT CREATES AN OVERHEATING OF THE BRAKE SYSTEM, WHICH HAS SYMPTOMS OF A BURNING SMELL FROM THE BRAKES AND THE RI…

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THE CAR HAS HAD FOUR REAR CALIPER FAILURES. THESE CALIPER FAILURES HAVE ALSO CONSUMED THREE SETS OF REAR BRAKE PADS AND TWO SETS OF REAR ROTORS. THE FAILURE APPEARS TO BE AN EXCESSIVE WEAR/SLOW TO RELEASE CONDITION THAT CREATES AN OVERHEATING OF THE BRAKE SYSTEM, WHICH HAS SYMPTOMS OF A BURNING SMELL FROM THE BRAKES AND THE RIM OF EACH WHEEL BEING FAR TOO HOT TO TOUCH. ONCE WE NOTICED THE MOST RECENT FAILURE, WE NOTICED THAT THE BURNING SMELL CAN START WITHIN ABOUT 1/2 MILE DRIVE.

NHTSA ODI #10821331

Mileage unknown · Oct 6, 2015
Electronic Stability Control (esc)Service Brakes

ESC LIGHT ON DOES NOT GOES WHEN USING ESC BUTTON

NHTSA ODI #10780290

36,100 miles · Aug 31, 2015
Electronic Stability Control (esc)Service Brakes

HELLO, 2009 SONATA: THE ESC OFF LIGHT COMES ON. IF I SHUT THE CAR OFF AND RE START, THE DASH LIGHT GOES OUT SOMETIMES; MAY RETURN THE NEXT TIME I START THE CAR. I HEARD THAT THIS IS A COMMON MANUFACTURE DEFECT. THANK YOU. *TR

NHTSA ODI #10760566

68,000 miles · Jul 6, 2015
Service BrakesUnknown Or Other

ON JULY 1, 2014 THE REAR CALIPER ON THE DRIVER'S SIDE OF MY CAR HAD SEIZED, STRIPPING THE BRAKES TO METAL ON METAL. ON AUGUST 30, 2014, THE REAR CALIPER ON THE PASSENGER SIDE OF THE CAR FOLLOWED SUIT. LESS THAN ONE YEAR LATER I HAVE REPLACED EACH OF THE REAR CALIPERS ONCE AGAIN. I HAD THE REAR DRIVER'S SIDE REPAIRED ON MAY 15, 2…

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ON JULY 1, 2014 THE REAR CALIPER ON THE DRIVER'S SIDE OF MY CAR HAD SEIZED, STRIPPING THE BRAKES TO METAL ON METAL. ON AUGUST 30, 2014, THE REAR CALIPER ON THE PASSENGER SIDE OF THE CAR FOLLOWED SUIT. LESS THAN ONE YEAR LATER I HAVE REPLACED EACH OF THE REAR CALIPERS ONCE AGAIN. I HAD THE REAR DRIVER'S SIDE REPAIRED ON MAY 15, 2015, AND THE REAR PASSENGER SIDE ON JUNE 9, 2015. I BOUGHT THE CAR WITH JUST OVER 53,000 MILES ON IT IN 2013. TODAY, IT HAS 101,000 MILES ON IT AND I HAVE REPLACED FOUR CALIPERS, THREE ROTORS AND FIVE SETS OF BRAKE PADS. EACH TIME MY CALIPERS FAILED I WAS PLACED IN DANGER OF TOTAL BRAKE FAILURE AND FIRE, UNKNOWINGLY. THE MECHANICS WHO WORKED ON MY CAR HAVE INDIVIDUALLY THEORIZED THAT AN ENGINEERING FAILURE IS THE CAUSE OF THIS ISSUE. LAST WEEK I CONTACTED HYUNDAI FOR FINANCIAL REIMBURSEMENT FOR THE REPAIRS. THE COMPANY STATED THAT THEY COULD NOT REIMBURSE ME SINCE THE PARTS WERE NOT REPLACED WITH HYUNDAI FACTORY PARTS, OR REPAIRED BY A HYUNDAI CERTIFIED DEALERSHIP. I AM AWARE THAT THERE WAS A CLASS ACTION LAWSUIT AGAINST HYUNDAI BASED ON THIS ISSUE IN THE STATE OF NEW YORK. I HAVE ALSO READ, AND HEARD ABOUT MANY OTHER PEOPLE HAVING THIS EXACT PROBLEM (REAR CALIPER PROBLEM) IN THEIR HYUNDAI SONATAS, BUILT BETWEEN THE YEARS 2006-2010.

NHTSA ODI #10732319

Official recalls

2

13V354000 · Suspension:rear

Aug 12, 2013

Hyundai is recalling certain model year 2006-2010 Sonata vehicles manufactured March 1, 2005, through January 21, 2010; and model year 2006-2011 Azera vehicles manufactured September 27, 2005, through November 22, 2010 originally sold in, or currently registered in, Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Road salt and water can enter portions of the rear crossmember, leading to corrosion of the crossmember steel. This may lead to detachment of one of the rear control arms.

Consequence & remedy

Consequence: Control arm separation may suddenly change the rear wheel alignment, affecting the handling of the vehicle, increasing the risk of a crash.

Remedy: Hyundai will notify owners, and dealers will repair or replace the crossmember assembly. The recall began on October 8, 2013. Owners may contact Hyundai Customer Care Center at 1-800-633-5151. Hyundai's recall number is 113.

13V113000 · Exterior Lighting:brake Lights:switch

Apr 1, 2013

Hyundai Motor Company (Hyundai) is recalling certain model year 2006-2009 Accent, model year 2007-2011 Azera, Sonata and Sante Fe,2006-2011 Tucson, 2009-2011 Elantra Touring, 2007-2010 Elantra, 2008-2011 Veracruz, 2009-2011 Genesis, 2010-2011 Genesis Coupe, 2007-2008 Entourage, and 2006-2008 Tiburon vehicles. Originally, in April 2013, Hyundai recalled 1,059,824 model year 2007-2009 Accent and Tucson, model year 2007-2010 Elantra, model year 2007-2011 Santa Fe, model year 2008-2009 Veracruz, model year 2010-2011 Genesis Coupe, and model year 2011 Sonata vehicles. In September 2013, Hyundai informed the agency that it was adding more vehicles to this campaign, representing an additional 652,512 units. The total number of vehicles being recalled is now 1,712,336. In the affected vehicles, the stop lamp switch may malfunction. A malfunctioning stop lamp switch may cause the brake lights to not illuminate when the brake pedal is depressed or may cause an inability to deactivate the cruise control by depressing the brake pedal. Additionally, a malfunctioning stop lamp switch may also result in intermittent operation of the push-button start feature, affect the operation of the brake transmission shift interlock feature, preventing the shifter from being moved out of the PARK position and cause the Electronic Stability Control (ESC) malfunction light to illuminate.

Consequence & remedy

Consequence: Failure to illuminate the stop lamps during braking or inability to disengage the cruise control could increase the risk of a crash. Additionally, when the ignition is in the 'ON' position, the transmission shifter may be able to be moved out of Park without first applying the brake. This may lead to unintentional movement of the car which may increase the risk of a crash.

Remedy: Hyundai will notify owners, and dealers will replace the stop lamp switch, free of charge. The safety recall began on April 22, 2013. Owners may contact Hyundai at 1-800-633-5151. Hyundai's recall campaign number is 110.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

3

DP22003 · Loss Of Motive Power

Opened Sep 12, 2022 · Closed Dec 12, 2023

Status: closed (inferred from source dates) · Engine

The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003) to evaluate the Petitioners’ request. The Petitioners have provided additional complaints within four supplemental letters dated January 31, 2023, March 21, 2023, May 23, 2023, and August 4, 2023. ODI’s evaluation included the review and analysis of the complaints and supporting information submitted by the Petitioners, as well as additional complaints submitted directly to NHTSA which referenced either the oil drain plug or a crack in the oil pan. After reviewing the available data, ODI has not identified evidence that would support opening a defect investigation into the oil drain pan assemblies of the subject vehicles. Based on a review of the available information, a loss of motive power resulting from an oil drain plug back out has not occurred between the initial sale of a vehicle and the completion of its first oil change. If during an oil change service, a technician fails to remove the existing drain plug gasket before installing a new gasket, it is likely that a proper seal between the drain plug and the oil pan will not be made. An improper seal between the drain plug and oil pan could lead to the backing out on the drain plug, resulting in the sudden loss of oil while driving. Additionally, the provided examples of oil pan cracks were localized to the immediate vicinity of the oil drain plug and/or appeared to be the result of direct-contact with a tool during servicing.  There is no information to support that a vehicle-based defect exists relating to the oil pan assembly, and instead the documented incidents are related to the failure to follow the proper maintenance procedures during oil change service. In October 2023, Hyundai published a Technical Service Bulletin (TSB) that provided detailed instructions for oil change service on its gasoline powered vehicles, specifically highlighting the need to remove and replace the existing drain plug gasket prior to reinstalling the drain plug. After a thorough review of the material submitted by the petitioner, the information already in NHTSA's possession, and the potential risks to motor vehicle safety implicated by the petitioners' allegations, NHTSA does not believe that a formal investigation is warranted. Therefore, the petition is denied. A Federal Register Notice (FRN) further detailing NHTSA’s reasons for denial of the petition will be published. The reference numbers for the complaints to NHTSA cited by the petitioner can be found in the petition submission documents in the public file for DP22-003. To review those complaints and the additional complaints ODI added to its evaluation which are cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

DP21003 · Throttle Control System Vulnerabilities

Opened Nov 12, 2021 · Closed Jun 20, 2023

Status: closed (inferred from source dates) · Vehicle Speed Control:throttle

The Office of Defects Investigation (ODI) of the National Highway Traffic Safety Administration (NHTSA) received a petition letter dated October 10, 2021, requesting an investigation of possible defects in the electronic throttle control (ETC) system on certain Kia vehicles resulting in the opening of DP21-003. Accordingly, Model Year (MY) 2005-2016 Kia Optima/K5, MY 2006-2015 Kia Sorento, MY 2007-2016 Hyundai Elantra, MY 2007-2016 Hyundai Santa Fe, MY 2006-2015 Hyundai Sonatas are all part of the subject population. The petition was originally filed as a Vehicle Owner Questionnaire that can be reviewed at NHTSA.gov under reference (ODI) number 11439675.On November 12, 2021, ODI opened Defect Petition DP21-003 to evaluate the petitioner?s request. ODI performed trend analyses of the VOQs related to vehicle speed control issues for all the subject vehicles and found that none of the 52 Model/Model Year Hyundai/Kia vehicles demonstrated any actionable trend that warranted an investigation.Petitioners submitted 1119 VOQs and non-VOQ cases in which sudden uncommanded acceleration (SUA) or loss of motive power (LOMP) incidents were alleged.For the 1119 reports, 220 were incidents involving crashes, from which 69 subject Hyundai-Kia vehicles were inspected by Hyundai/Kia dealer technicians, Hyundai/Kia engineers, and/or third-party representatives.ODI found the inspections identified no vehicle defects related to the ETC system.Of the 220 crash-involved reports, 13 Event Data Recorder (EDR) records were downloaded successfully and 11 of those indicated driver error: (i.e.) pedal misapplication.A condition where the accelerator pedal is mistakenly applied instead of the brake pedal when the driver wants to stop the vehicle.In addition, ODI reviewed a scientific journal paper published in Forensic Science International in 2016 by Mr. Park et al ., as well as related test videos. ODI does not believe there is any evidence of uncontrollable SUA occurrences in any of the tests reviewed. NHTSA's Office of Vehicle Safety Compliance (OVSC) reviewed the allegations regarding the potential noncompliance with Federal Motor Vehicle Safety Standard No. 124.Based on the information provided, the Agency concludes there is insufficient information for us to determine if a possible non-compliance exists.Finally, both Hyundai and Kia informed ODI that all their vehicles manufactured after 2012 were equipped with an ETC management system, in which the engine speed will go to idle when the system sees signals from both the brake pedal and accelerator pedal at the same time; this is commonly known as the brake-throttle override system.After thoroughly assessing the material submitted by the petitioner, information already in NHTSA's possession, information submitted by Hyundai and Kia in response to an Information Request letter, and the potential risks to safety implicated by the petitioner's allegation, NHTSA does not believe that a formal investigation is warranted. After full consideration of appropriate factors, the petition is denied. A Federal Register Notice (FRN) further detailing NHTSA?s reasons for denial of the petition will be published.

PE13007 · Rear Control Arm Failure

Opened Mar 25, 2013 · Closed Aug 20, 2013

Status: closed (inferred from source dates) · Suspension:rear

In a letter dated August 9, 2013, Hyundai-Kia America Technical Center, Inc. (Hyundai) notified NHTSA that Hyundaiis conducting a safety recall (13V-354) involving approximately 239,000 vehicles involving model year (MY) 2006 through 2010 Hyundai Sonata vehicles (approximately 215,000)produced beginning on March 1, 2005 through January 21, 2010 and model year (MY) 2006 through 2011 Hyundai Azera vehicles (approximately 24,000) produced beginning on September 27, 2005 through November 22, 2010 that are registered in and operated or originally sold in the following 20 salt belt states and the District of Columbia: Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, and Wisconsin.Hyundai will also inform dealers to inspect/repair vehicles that were previously registered in salt belt states but are currently registered elsewhere. Hyundai is conducting the recall to remedy a defect involving internal corrosion of the rear sub frame that may lead to separation of the rear upper/lower control arm(s) at their respective mounting points and/or separation of the axle from the transaxle where they meet.This could result in a loss of vehicle control and/or vehicle disablement which may increase the risk of a vehicle crash.In response to NHTSA?s Information Request (IR) letter, Hyundai stated the Azera vehicles utilizes the identical cross member and upper/lower rear control arm components as the subject (Sonata) vehicles.In analysis of both Vehicle Owner Questionnaire (VOQ) data submitted to the Office of Defects Investigation (ODI) and consumer complaint data submitted to Hyundai, ODI identified 19 non-duplicative reports alleging excessive corrosion of the rear sub frame. All of the complaint vehicles were either originally sold or registered at the time of the incident in one of the salt belt states.Of these 19 reports, 9 alleged either a suspension component separation or a fracture of the vehicle's rear cross member assembly.Similarly, ODI identified 8 warranty claims of rear sub frame replacement in data submitted by Hyundai due to excessive corrosion, all of which involved vehicles originally sold or operated in a salt belt state. Based on Hyundai's decision to conduct a safety recall, (13V-354) this investigation is closed.The VOQs cited above can be viewed at www-odi.nhtsa.dot.gov/owners/SearchNHTSAID under the following identification numbers: 10535115, 10534110, 10525976, 10524726, 10521520, 10508368, 10505463, 10490073, 10486752, 10486435, 1048354, 10473922, and 10437887.