NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
31 reportsClear category filterMileage unknown · Apr 11, 2024
EnginePower TrainVehicle Speed Control
*4th report to NHTSA* Trouble getting response from HMA case manager. Delaying/not responding to multiple emails/calls/contact forms. Please advise. 1. What component or system failed or malfunctioned, and is it available for inspection upon request? - Multiple systems continuing to fail/malfunction. Multiple attempts to repair…
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*4th report to NHTSA* Trouble getting response from HMA case manager. Delaying/not responding to multiple emails/calls/contact forms. Please advise. 1. What component or system failed or malfunctioned, and is it available for inspection upon request? - Multiple systems continuing to fail/malfunction. Multiple attempts to repair at Hyundai dealerships. Vehicle is currently at the dealer service center where it was originally purchased on [XXX] (Dealer number P113588 , Ron Carter Hyundai) now Big Star Hyundai. Yes - PLEASE conduct VIN inspection on this vehicle. I am waiting to hear back from dealer & HMA case manager to confirm vehicle specifications relating to VIN in their system and full engine inspection results. 2. How was your safety or the safety of others put at risk? - First reported and diagnostics completed by dealer [XXX]. Problems with engine have continued and escalated to current. Latest safety risk event occurred [XXX] while driving on high traffic freeway in Houston, TX with child passenger. Vehicle lost ability to control speed/driving power suddenly stopped/failed resulting in tow to dealership. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? - Yes. Included notes in attached reports from previous dealer visits. Symptoms, reporting & attempts to repair started within warranty window. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? - Previous inspection reports attached. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? - CEL was on and off at the start of symptoms Dec. 2021. Dealer replaced MAP sensors and the issues continued without warning lamps. Dealer stated they could not diagnose anything without warning lamps. Dealer reported unknown diagnosis and closed case. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI #11582481
Mileage unknown · Apr 1, 2024
EngineFuel/propulsion SystemPower Train
Bought the car a yr ago and transmission started slipping and stalling sometimes even engine shutting off while driving at higher speeds unable to steer and when pulling into traffic is on interstate almost got hit because I could not speed up it's also using double the fuel while driving longer distances I tried to use my warra…
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Bought the car a yr ago and transmission started slipping and stalling sometimes even engine shutting off while driving at higher speeds unable to steer and when pulling into traffic is on interstate almost got hit because I could not speed up it's also using double the fuel while driving longer distances I tried to use my warranty 2x before my warranty was up but both neither time did Hyundai in Owensboro check what I booked the appt for. First one was booked to check transmission and power issue then called the day before and added oil change. When I arrived the tech retyped my order and changed the oil. Brought my keys I asked about the power/transmission issues and was told they didn't know to check that but at that point there was no time and had to reschedule... So I did. Waited almost 2 months booked appt for transmission / power issue and also check the fuel usage. Finish the service call quoting me over $1300 to fix the fuel issue because no one could find my warranty eventhough I had my original paperwork showing who warranty was with and also the acct number for the warranty. When I asked about transmission or power issue I was told there was no one to check that and I had to rebook but this time it was going to be 8 weeks and by then my warranty had expired. I feel like Hyundai did this on purpose because they are in cahoots with the lot I bought the car from. Now my car is getting worse and worse and scared to even drive the car im overpaying for. This was my first Hyundai and more than likely will forever be my last because the car I got was a lemon it seems, the customer service was worthless and the service even worse. I'm reporting to BBB and everywhere I can.
NHTSA ODI #11580520
Mileage unknown · Mar 27, 2024
EnginePower TrainVehicle Speed Control
Initial report on March 7, 2022 (approx. 94K miles), second report on Dec. 12, 2023 (approx. 111,700 miles). Third report March 27, 2024: Recent event occurred on March 23, 2024 (approx. 112K miles) when my vehicle suddenly stopped moving while driving 55mph on a freeway with child passenger in the vehicle, putting both of us at…
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Initial report on March 7, 2022 (approx. 94K miles), second report on Dec. 12, 2023 (approx. 111,700 miles). Third report March 27, 2024: Recent event occurred on March 23, 2024 (approx. 112K miles) when my vehicle suddenly stopped moving while driving 55mph on a freeway with child passenger in the vehicle, putting both of us at risk for collision. Vehicle did not have any warning lights turn on prior to or during event. The vehicle did not move again after multiple attempts to accelerate to exit freeway safely. After shifting to neutral and back to drive, the vehicle suddenly jolted and accelerated randomly while holding foot on the gas pedal (no control over timing of acceleration). We were able to exit the freeway safely. This same issue repeated multiple times while driving us to a safe area to call for a tow truck. The vehicle was towed to dealership location it was originally purchased at on March 26, 2024. Diagnostics appointment scheduled for March 28, 2024. I have completed oil change services on this car about every 1,200 miles to keep the engine running since there was no solution for any of my previous reports to dealership (even when opening a case with Hyundai), their previous determination was to close case since the diagnostics report did not show error codes in report. Previous dealership advisor made a verbal comment that the real problem is something their computers do not scan codes for, and his recommendation was to "drive it til the wheels fall off" after paying thousands in services that did not solve the root problem. Hoping this appointment will lead to a safer outcome.
NHTSA ODI #11579707
Mileage unknown · Apr 24, 2023
Electrical SystemPower TrainVehicle Speed Control
My Hyundai Elantra started completely shutting off while I was driving. This happened on multiple occasions like in slow traffic and while going high speeds on the highway. This is scary and dangerous when my toddler child is in the car. I took it to 3 different mechanics and no one can find any codes or anything wrong with it--…
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My Hyundai Elantra started completely shutting off while I was driving. This happened on multiple occasions like in slow traffic and while going high speeds on the highway. This is scary and dangerous when my toddler child is in the car. I took it to 3 different mechanics and no one can find any codes or anything wrong with it---but it continues to happen and put my life and my daughters life at risk. I have seen so many people complaining of the same thing--but nothing has happened? This last dealership has had my car for 3 weeks (and counting) but still cannot find the issue. I have about 125,000 miles on the car.
NHTSA ODI #11518693
Mileage unknown · Feb 3, 2023
Electrical SystemEnginePower Train
Car stutters at low speed.
NHTSA ODI #11505482
Mileage unknown · Aug 31, 2022
EnginePower TrainService Brakes
I believe it is the transmission/ power train that failed. It slides gears and the engine stalls. While driving, I was almost hit because I could not speed up. I had to decelerate in order for the gear to not stutter.
NHTSA ODI #11482326
Mileage unknown · Jul 8, 2022
EnginePower Train
On 06/10/2022 Going down the road went to shift gears and it was stuck in 5th gear. Finally got it released and safely made it home. Ever since you can shift the gears and reverse while engine isn’t running but once I turn on the vehicle it refuses to shift into any gears including reverse. I have a FIXD OBD2 sensor and it showe…
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On 06/10/2022 Going down the road went to shift gears and it was stuck in 5th gear. Finally got it released and safely made it home. Ever since you can shift the gears and reverse while engine isn’t running but once I turn on the vehicle it refuses to shift into any gears including reverse. I have a FIXD OBD2 sensor and it showed no warning messages before, during, and now. No codes are showing up when plugged in. Matter of fact it says there’s no issues with my car ? I had a mechanic take a look since he was willing to come to my house considering I currently don’t have the funds to get it checked out & he said it’s probably my clutch has went out, but that can’t be the case considering it will turn on still. I have no messages appear on the dash & I have plenty of transmission oil. Today is 07/08/2022 and it has just been sitting there due to the fact I’ve lost my employment and can’t afford to have it looked at
NHTSA ODI #11472842
Mileage unknown · Jun 3, 2022
EnginePower TrainVehicle Speed Control
April 2022 Car engine stalls while at stop sign or light. Started happening once or twice every few weeks. Took the vehicle to two repair shops but could not diagnose the issue. Vehicle giving no diagnostic codes or warning lights. May 2022 vehicle is now stalling and losing acceleration while driving on busy highway, leaving me…
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April 2022 Car engine stalls while at stop sign or light. Started happening once or twice every few weeks. Took the vehicle to two repair shops but could not diagnose the issue. Vehicle giving no diagnostic codes or warning lights. May 2022 vehicle is now stalling and losing acceleration while driving on busy highway, leaving me and my children on the highway shoulder. Car loses acceleration and coasts to a complete stop. No warning lights have come on previously. Could not book an appointment with Hyundai dealer until June 25, 2022. As of June 3rd 2022, check engine light is on and car having trouble starting back up after stall. Vehicle is stalling and losing acceleration 2-3 times a day no matter the speed. Booked appointment with Hyundai dealer in another area for June 9, 2022.
NHTSA ODI #11467344
Mileage unknown · May 16, 2022
Power Train
My 2016 Hyundai Elantra started jerking and losing acceleration power. I got stuck at a stop sign because the car lost the ability to change gears. It felt very unsafe to be stuck in the middle of traffic and have to wave people around my vehicle at night. I’ve taken it to two different mechanics who have both said my vehicle ha…
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My 2016 Hyundai Elantra started jerking and losing acceleration power. I got stuck at a stop sign because the car lost the ability to change gears. It felt very unsafe to be stuck in the middle of traffic and have to wave people around my vehicle at night. I’ve taken it to two different mechanics who have both said my vehicle has experienced premature transmission failure due to a factory defect. The car has 90,000 miles. I am a second owner so my warranty ended at 60,000 miles. There was no warning or dash lights. It was very abrupt and unexpected.
NHTSA ODI #11464898
Mileage unknown · Sep 30, 2021
Power Train
My vehicle is only 5 years old and the transmission has problems. I was driving and the car stopped with an impact force. I thought that someone or something had hit me from behind. For over over 2 months, I have been without a vehicle because the mechanic shop states that the transmission need part replacements.
NHTSA ODI #11434960
NHTSA investigations
1DP21003 · 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.