NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
21 reportsClear category filter55,000 miles · Jul 17, 2019
Power Train
BOUGHT BRAND NEW, ORIGINAL OWNER WARRANTY VERIFIED AND REGULAR MAINTENANCE DONE AT 5K INTERVALS INSTEAD OF 7500 MILES DUE TO BURNING OIL WITHIN FIRST YEAR OF OWNERSHIP. DEALERSHIP HAS REFUSED OPPORTUNITIES TO INSPECT AND REPAIR FOR OTHER WARRANTABLE DEFECTS IN BACKUP CAMARA, SUNROOF, ETC. CAR OUT OF SERVICE SINCE 3-28-19, AT 550…
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BOUGHT BRAND NEW, ORIGINAL OWNER WARRANTY VERIFIED AND REGULAR MAINTENANCE DONE AT 5K INTERVALS INSTEAD OF 7500 MILES DUE TO BURNING OIL WITHIN FIRST YEAR OF OWNERSHIP. DEALERSHIP HAS REFUSED OPPORTUNITIES TO INSPECT AND REPAIR FOR OTHER WARRANTABLE DEFECTS IN BACKUP CAMARA, SUNROOF, ETC. CAR OUT OF SERVICE SINCE 3-28-19, AT 55000 MILES CLUTCH ASSEMBLY RIVETS DETACHED AND POWERTRAIN FAILED CAUSING A CRACKED ROD. CAR WAS PRESENTED TO DEALER. DEALER REFUSED. HYUNDAI ASSURANCE REFUSED TOW TO NEXT DEALER WITHOUT UPFRONT PAYMENT. CAR WAS TAKEN TO LOCAL AAMCO WHERE DEFECTIVE RIVETS WERE DIAGNOSED. OEM CLUTCH WAS RETAINED FOR EVIDENCE. CAR WAS EXAMINED BY SECOND ASE TECHNICIAN, CAR WAS DEEMED HAZARDOUS TO DRIVE AND COULD CAUSE FIRE IF ROD BROKE AND PUNCTURED ENGINE WALL DUE TO DIRECT INJECTION SYSTEM. COSTS FOR REPAIR/RENTAL/TOW APPROACHED 15000, SO RENTAL WAS TURNED IN AND ANOTHER VEHICLE WAS PURCHASED TO PROVIDE TRANSPORTATION WHILE ARBITRATING COMPLAINT. ITS ONLY VEHICLE SINGLE PARENT AND WARRANTY COVERS REPAIR/TOW/RENTAL, BUT HYUNDAI CORPORATE AND DEALER HAVE YET TO PROVIDE ANY REMEDY (STILL AS OF 7-17-19) PER CFR RULE 703 OR MAGNUSSON-MOSS ACT CLAIM WITH BBB AUTOLINE WAS FILED CERTIFIED MAIL ON 5-15-19. BBB MEDIATOR FAKED PHONE CALL AGREEMENT AND PERJURED SETTLEMENT LETTER. OFFER WAS NEVER ACCEPTED BECAUSE NEITHER HYUNDAI NOR BBB ARE FOLLOWING RULE 703 PROCEDURES AND DID NOT COMPLETE RESPONSE FORM. INSTEAD BBB ASSIGNED A SPECIALIST TO PERSONALLY ATTACK AND INTERROGATE ATTEMPTING TO COERCE ME. MULTIPLE REQUESTS FOR ARBITRATION HAVE BEEN NEGATED OR IGNORED. LOCAL BBB OFFICE IN TOWN OF RESIDENCE WAS CONTACTED END OF JUNE. THE REPRESENTATIVE THAT SAID SHE COULD GET ARBITRATION SETUP WAS FIRED THE DAY AFTER. WAS TOLD BY DIRECTOR OF OPERATIONS THEY MAY NOT HAVE ARBITRATOR AVAILABLE AND WILL REQUIRE TRAVEL 5 HRS AWAY TO ATTEND HEARING IF HYUNDAI AGREES TO ARBITRATE?
NHTSA ODI #11232747
100,500 miles · May 2, 2019
EnginePower Train
TL* THE CONTACT OWNS A 2014 HYUNDAI ELANTRA. WHILE MAKING A RIGHT TURN AT 15 MPH, THE ENGINE STARTED TO STALL AND HESITATED UNTIL IT CEASED. THE VEHICLE WAS TAKEN TO NAPLETON'S AUTO PARK OF URBANA (LOCATED AT 1111 NAPLETON WAY, URBANA, IL 61802, (217) 367-1222) WHO STATED THAT DIAGNOSTIC TESTING WAS NEEDED. THE VEHICLE WAS TAKEN…
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TL* THE CONTACT OWNS A 2014 HYUNDAI ELANTRA. WHILE MAKING A RIGHT TURN AT 15 MPH, THE ENGINE STARTED TO STALL AND HESITATED UNTIL IT CEASED. THE VEHICLE WAS TAKEN TO NAPLETON'S AUTO PARK OF URBANA (LOCATED AT 1111 NAPLETON WAY, URBANA, IL 61802, (217) 367-1222) WHO STATED THAT DIAGNOSTIC TESTING WAS NEEDED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE TRANSMISSION NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 100,500. THE VIN WAS INVALID.
NHTSA ODI #11205366
42,000 miles · Jan 30, 2019
Power Train
AFTER BEING PARKED OVERNIGHT, SPORADICALLY THE CAR WILL NOT SHIFT OUT OF PARK UPON PRESSING THE BRAKE AND STARTING THE CAR. THE LITTLE BUTTON ON THE SHIFTER THAT YOU PUSH IN ORDER TO MOVE OUT OF PARK IS LOCKED AND WHEN PRESSED, EMITS A SOUND COMING FROM THE IGNITION WHERE YOU PUT THE KEY IN. YOU CAN HEAR IT CLICK FROM THE STEERI…
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AFTER BEING PARKED OVERNIGHT, SPORADICALLY THE CAR WILL NOT SHIFT OUT OF PARK UPON PRESSING THE BRAKE AND STARTING THE CAR. THE LITTLE BUTTON ON THE SHIFTER THAT YOU PUSH IN ORDER TO MOVE OUT OF PARK IS LOCKED AND WHEN PRESSED, EMITS A SOUND COMING FROM THE IGNITION WHERE YOU PUT THE KEY IN. YOU CAN HEAR IT CLICK FROM THE STEERING COLUMN EACH TIME YOU PRESS THE RELEASE BUTTON ON THE SHIFTER. THE ONLY WAY TO FIX THE PROBLEM IS TO TURN THE CAR OFF AND BACK ON AGAIN. THEN THE CAR SHIFTS OUT OF PARK NORMALLY. I CANNOT GET THE CAR TO REPLICATE THIS FOR THE MECHANIC, AS IT ONLY HAPPENS EVERY FEW DAYS.
NHTSA ODI #11173192
110,000 miles · Aug 13, 2018
Power Train
SUDDEN, HARD AND DANGEROUS DOWNSHIFT TO I THINK FIRST. YOU CAN BE GOING SLOW AND IT COULD HAPPEN BUT IT JUST HAPPENED TO ME AT 40 OR 50 MILES AN HOUR. YOU PUSH THE GAS A LITTLE AND NO ACCELERATION AND I MEAN NOTHING AND THERE SHOULD HAVE BEEN . YOU PUSH SOME MORE AND STILL NOTHING HAPPENS. THEN ALL OF A SUDDEN IT SLAMS INTO I TH…
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SUDDEN, HARD AND DANGEROUS DOWNSHIFT TO I THINK FIRST. YOU CAN BE GOING SLOW AND IT COULD HAPPEN BUT IT JUST HAPPENED TO ME AT 40 OR 50 MILES AN HOUR. YOU PUSH THE GAS A LITTLE AND NO ACCELERATION AND I MEAN NOTHING AND THERE SHOULD HAVE BEEN . YOU PUSH SOME MORE AND STILL NOTHING HAPPENS. THEN ALL OF A SUDDEN IT SLAMS INTO I THINK FIRST. I ALMOST HIT THE STEERING WHEEL AND A CAR BEHIND ME HAD TO SWERVE. I KNOW A BIT ABOUT CARS AND I CAN TELL YOU I'M SHOCKED IT'S ENGINEERED THAT THIS CAN HAPPEN. I SEE A FEW PEOPLE ONLINE HAVE HAD A SIMILAR ISSUE. I DON'T KNOW IF YOU'LL DO ANYTHING, I'M JUST LETTING YOU KNOW.
NHTSA ODI #11119739
90,000 miles · May 4, 2018
Power Train
TICKING NOISE COMING FROM ENGINE- FAILED LIFTERS AND METAL SHAVINGS INSIDE ENGINE FOUND IN OIL PAN
NHTSA ODI #11091732
28,000 miles · Apr 24, 2017
Power Train
THE CAR INTERMITTENTLY DOES NOT START. CAR WILL START AFTER IT SITS FOR A LENGTH OF TIME (COULD BE HOURS OR DAYS) OR AFTER IT HAS BEEN TOWED TO THE DEALERSHIP. MOVEMENT SEEMS TO SHAKE THE CONNECTION IF THAT IS THE PROBLEM, INTO WORKING. HAS LEFT OWNER STRANDED ON NUMEROUS OCCASIONS IN THE LAST 5 WEEKS. DEALERSHIP SAYS THAT IF …
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THE CAR INTERMITTENTLY DOES NOT START. CAR WILL START AFTER IT SITS FOR A LENGTH OF TIME (COULD BE HOURS OR DAYS) OR AFTER IT HAS BEEN TOWED TO THE DEALERSHIP. MOVEMENT SEEMS TO SHAKE THE CONNECTION IF THAT IS THE PROBLEM, INTO WORKING. HAS LEFT OWNER STRANDED ON NUMEROUS OCCASIONS IN THE LAST 5 WEEKS. DEALERSHIP SAYS THAT IF IT CAN NOT REPRODUCE THE PROBLEM, THEREFORE THEY CAN NOT DIAGNOSE IT. VERY DANGEROUS FOR ME IF I GET STRANDED IN AN UNSAFE AREA. DEALER CHANGED THE STARTER BUT IS UNWILLING TO TRY ANYTHING ELSE. I STATED THAT I DID NOT WANT THE CAR UNTIL IT WAS FIXED AND SAFE TO DRIVE. DEALERSHIP TOLD ME TO BUY ANOTHER CAR SINCE "I DIDN'T WANT" THIS CAR.
NHTSA ODI #10980166
79,679 miles · Dec 22, 2016
Electrical SystemEnginePower Train
THE TRANSMISSION RANGE SENSOR ON MY CAR DIED AFTER ABOUT 78000 MILES AND CAUSED THE CAR TO LOCK UP WHILE ON THE HIGHWAY. STAYED IN 3RD GEAR AND FOR A FEW WEEKS BEFORE WOULD LOCK UP WHILE IN PARK, NEUTRAL, REVERSE AND DRIVE (MOST COMMONLY WHILE IN PARK). THIS NEARLY CAUSED A COUPLE OF ACCIDENTS. AFTER DOING SOME RESEARCH THIS APP…
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THE TRANSMISSION RANGE SENSOR ON MY CAR DIED AFTER ABOUT 78000 MILES AND CAUSED THE CAR TO LOCK UP WHILE ON THE HIGHWAY. STAYED IN 3RD GEAR AND FOR A FEW WEEKS BEFORE WOULD LOCK UP WHILE IN PARK, NEUTRAL, REVERSE AND DRIVE (MOST COMMONLY WHILE IN PARK). THIS NEARLY CAUSED A COUPLE OF ACCIDENTS. AFTER DOING SOME RESEARCH THIS APPEARS TO BE A COMMON PROBLEM WITH ELANTRAS DATING ALL THE WAY BACK TO 2007 AND EVEN HAS CONTINUED PAST MY MODEL YEAR (2014) INTO 2015 MODELS. THE DEALERSHIP EVEN REFERRED TO IT ASO A FAULTY RANGE SENSOR WHICH TO ME SEEMS TO IMPLY THAT THEY KNOW ABOUT THIS ISSUE. I COULDN'T SHIFT AND HAD A MORE DIFFICULT TIME SLOWING DOWN AND SPEEDING UP THAN USUAL. THE PART IS RELATIVELY INEXPENSIVE BUT THE DIAGNOSTIC FEE PLUS LABOR TO REMOVE AND REPLACE THE FAULTY MECHANICAL PART WAS WELL OVER $150, RESULTING IN A TOTAL BILL OF $210. A PART FAILURE THAT CAUSES THE VEHICLES COMPUTER, TRANSMISSION AND DRIVETRAIN TO LOSE ALL CONNECTION TO ONE ANOTHER CAN BE VERY DANGEROUS, ESPECIALLY WHILE ON THE HIGHWAY. AT FIRST IT HAPPENED ONLY WHILE STATIONARY IN PARK, THE CAR WOULD LOCK UP WHILE SITTING WITH THE ENGINE RUNNING FOR A WHILE. I WOULD TURN OFF THE ENGINE AND RE-ENGAGE THE VEHICLE AND EVERYTHING WOULD OPERATE AS NORMAL. THEN IT OCCURRED WHILE BACKING DOWN THE HILL OUT OF MY DRIVEWAY, LOCKED UP IN REVERSE, I APPLIED THE BRAKES, SET THE PARKING BRAKE AND TURNED OFF THE CAR WHILE STILL IN REVERSE. (I LIVE IN A QUIET SUBDIVISION OF A SMALL TOWN OF 12,000, WHAT IF THIS HAPPENED IN A BUSIER OR MORE HEAVILY POPULATED AREA?) I WAS STILL ABLE TO START THE VEHICLE WHILE IN REVERSE AND SHORTLY THEREAFTER WHILE IN NEUTRAL. THEN TUESDAY MORNING WHILE ON THE INTERSTATE (I-95) THE GEAR AND DRIVE MODE INDICATOR ON THE TACHOMETER WENT BLANK, I WAS STUCK IN 3RD GEAR (LIMP MODE) AND MY CAR ONCE SLOWING DOWN HAD A DIFFICULT TIME ACCELERATING AFTER STOPPING.
NHTSA ODI #10936844
4,500 miles · Apr 4, 2016
Electrical SystemPower Train
TL* THE CONTACT OWNS A 2014 HYUNDAI ELANTRA. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START AND STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED MORE THAN ONCE DUE TO THE FAILURE. THE CONTACT NOTIFIED MORE THAN ONE DEALER, BUT THEY COULD NOT REPLICATE AND DIAGNOSE THE FAILURE. THE VEHICLE WAS STILL AT THE DEALER FOR FURTHER I…
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TL* THE CONTACT OWNS A 2014 HYUNDAI ELANTRA. THE CONTACT STATED THAT THE VEHICLE WOULD NOT START AND STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED MORE THAN ONCE DUE TO THE FAILURE. THE CONTACT NOTIFIED MORE THAN ONE DEALER, BUT THEY COULD NOT REPLICATE AND DIAGNOSE THE FAILURE. THE VEHICLE WAS STILL AT THE DEALER FOR FURTHER INSPECTION. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 4,500. UPDATED 05/24/16*LJ THE CONSUMER STATED THE RANGE SWITCH WAS REPLACED . THE VEHICLE WAS REPAIRED. UPDATED 12/11/2017*JS
NHTSA ODI #10853362
4,200 miles · Aug 27, 2015
Power TrainService BrakesCrash
RETURNED HOME FROM WORK AND PARKED VEHICLE IN DRIVEWAY, GOT OUT AND GOT GROCERIES FROM PASSENGER SIDE. WENT INSIDE AND ABOUT TWENTY MINUTES LATER WAS INFORMED BY NEIGHBOR THAT MY CAR HAD ROLLED OUT OF THE DRIVEWAY, ACROSS A 55 MPH STREET, AND THROUGH DITCH INTO NEIGHBORS YARD. WHEN MYSELF AND THREE OTHER PEOPLE APPROACHED THE V…
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RETURNED HOME FROM WORK AND PARKED VEHICLE IN DRIVEWAY, GOT OUT AND GOT GROCERIES FROM PASSENGER SIDE. WENT INSIDE AND ABOUT TWENTY MINUTES LATER WAS INFORMED BY NEIGHBOR THAT MY CAR HAD ROLLED OUT OF THE DRIVEWAY, ACROSS A 55 MPH STREET, AND THROUGH DITCH INTO NEIGHBORS YARD. WHEN MYSELF AND THREE OTHER PEOPLE APPROACHED THE VEHICLE WE WERE ASTONISHED TO SEE THAT THE E-BRAKE HAD BEEN ENGAGED AND YET THE VEHICLE ROLLED DOWN DRIVEWAY WITH NO SIGNS OF TIRE DRAGGING. IT IS AS IF THE E-BRAKE COMPLETELY FAILED FOR A SHORT PERIOD OF TIME. THERE ARE OTHER HYUNDAI'S OF SIMILAR BUILD RECALLED FOR "PARKING BREAK ISSUES CAUSING DRAGGING WHILE DRIVING AND POSSIBLE ROLLAWAY WHILE PARKED". SADLY HYUNDAI IS NOT HELPFUL BECAUSE MY EXACT CAR DOES NOT HAVE A CURRENT RECALL GOING. I BELIEVE THAT MY CAR HAS AN ISSUE THAT IS A DEFECT OF THE CALIBER THAT CREATES THE AMOUNT OF DAMAGES NECESSARY TO RECALL A MODEL OF VEHICLE. DEATH OR SERIOUS INJURY COULD HAVE RESULTED DUE TO THE MALFUNCTION OF THE PARKING BRAKE IN MY CAR. MY VEHICLE HAS INCURRED ABOVE $3,000 WORTH OF STRUCTURAL AND BODY DAMAGE FROM ROLLING AWAY AT NO FAULT OF MY OWN. IT IS CURRENTLY AT A REPAIR SHOP AND I AM PURSUING A CLAIM WITH HYUNDAI BUT THEY ARE NOT DOING WHAT IS BEST FOR THE SAFETY OF CONSUMERS. AN INSPECTOR SHOULD BE OUT TO LOOK AT MY BRAKES REGARDLESS OF THE OUTCOME, CIRCUMSTANCE, OR FAULT. INSTEAD OF TRYING TO AVOID PAYING FOR MY CAR THEY SHOULD BE LOOKING INTO IF THIS MALFUNCTION COULD CAUSE HARM AND PROPERTY DAMAGE TO OTHER PEOPLE. THANK YOU FOR CARING ABOUT THE SAFETY OF OUR CARS AND ROADS. *TR
NHTSA ODI #10759859
4,000 miles · Feb 8, 2015
Power Train
WHILE DRIVING CRUISING AT 45MPH ALL OF A SUDDEN THE VEHICLE FELT LIKE IT WENT INTO NEUTRAL AND THE RPMS WENT UP TO 4000 WHEN LEFT OF THE GAS AND GAVE IT GAS SHIFTED BACK INTO GEAR. ALSO WHEN YOU GO UP A HILL AND GET TO CRUISING SPEED THE VEHICLE HANGS IN LOW GEAR AND HIGH RPMS WHEN LET OFF IT WILL UP SHIFT THIS IS AN INTERMITTEN…
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WHILE DRIVING CRUISING AT 45MPH ALL OF A SUDDEN THE VEHICLE FELT LIKE IT WENT INTO NEUTRAL AND THE RPMS WENT UP TO 4000 WHEN LEFT OF THE GAS AND GAVE IT GAS SHIFTED BACK INTO GEAR. ALSO WHEN YOU GO UP A HILL AND GET TO CRUISING SPEED THE VEHICLE HANGS IN LOW GEAR AND HIGH RPMS WHEN LET OFF IT WILL UP SHIFT THIS IS AN INTERMITTENT PROBLEM. TOOK IT TO DEALER 3 TIMES ON THE 3RD TIME THEY KEPT IT OVERNIGHT AND THE MECHANIC FINALLY FELT IT AND AGREED IT "HANGS IN GEAR" HE SAID "DOES NOT KICK DOWN SMOOTHLY AND SEEMS LIKE THE TCM IS CONFUSED AND TAKES AWHILE TO DECIDE WHAT GEAR TO GO INTO". HE ALSO SAY " IT SEEMS WORSE IN ACTIVE ECO MODE AND WHEN HE SHIFTS IT MANUALLY IT SEEMS FINE". THERE HAS BEEN A SIGNIFICANT REDUCTION IN GAS MILEAGE. *JS
NHTSA ODI #10681985
Official recalls
2Sep 22, 2023
Hyundai Motor America (Hyundai) is recalling certain 2011-2015 Elantra, Genesis Coupe, Sonata Hybrid, 2012-2015 Accent, Azera, Veloster, 2013-2015 Elantra Coupe, Santa Fe, 2014-2015 Equus, 2010-2012 Veracruz, 2010-2013 Tucson, 2015 Tucson Fuel Cell, and 2013 Santa Fe Sport vehicles. The Anti-Lock Brake System (ABS) module may leak brake fluid internally and cause an electrical short, which can result in an engine compartment fire while parked or driving.
Consequence & remedy
Consequence: An engine compartment fire while parked or driving can increase the risk of injury.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the ABS fuse, free of charge. Owner notification letters were mailed April 10, 2024 through October 11, 2024. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 251.
Nov 30, 2017
Hyundai Motor Company (Hyundai) is recalling certain 2013-2014 Elantra sedan, coupe and GT vehicles. The brake pedal stopper pad can deteriorate allowing the brake light switch plunger to remain extended when the brake pedal is released. This will allow the brake lights to remain illuminated continuously. It can also allow the shift lever to be moved without depressing the brake pedal, or activate the engine management brake pedal override feature.
Consequence & remedy
Consequence: If the brake light switch plunger does not retract as it should when the brake pedal is not being pressed, the brake lights may stay illuminated preventing accurate communication to following vehicles that the vehicle is slowing or stopping. Additionally, if the brake switch plunger is not retracted, then the transmission can be shifted out of PARK without depressing the brake pedal. Either condition increases the risk of a crash.
Remedy: Hyundai will notify owners, and dealers will replace the brake pedal stopper pad, free of charge. The recall is expected to begin February 8, 2018. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 170. This campaign expands recall 16V574.
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
2AQ23002 · Hyundai And Kia Abs Module Fires
Opened Nov 17, 2023 · No close date supplied
Status: open (inferred from source dates) · Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip:control Unit/module
The Office of Defects Investigation (ODI) has received eight Hyundai Motor America (Hyundai) and eight Kia America, Inc. (Kia) Part 573 Recall Reports between 2016 and 2023. The combined 16 safety recalls all involve the antilock braking system (ABS) modules or Hydraulic Electronic Control Units (HECU) manufactured by the equipment supplier Mando. The Part 573 Recall Reports contain varying defect descriptions and differing remedy descriptions for the same or similar equipment supplied by Mando. Safety recalls included in this Audit Query (AQ) review include: Hyundai recalls 20V-520, 20V-543, 21V-161, 21V-160, 21V-303, 22V-056, 22V-810, and 23V-651. Kia recalls 16V-815, 20V-518, 20V-519, 21V-137, 21V-331, 22V-051, 22V-800, and 23V-652 The purpose of this AQ is to evaluate the timeliness and scoping of Hyundai and Kia’s defect decision making and adherence with reporting requirements; and understand the varying defect descriptions and remedies between these recalls.
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.