The contact's son owns a 2017 Hyundai Sonata Hybrid. The contact stated that while her son was driving at an undisclosed speed, he smelled a burning odor on the interior of the vehicle, after which he heard an abnormal sound coming from the engine compartment. The check engine warning light was illuminated. The vehicle was taken to the dealer to be diagnosed; however, the contact was not aware of the diagnostic report. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V727000 (Engine); the VIN was included, and parts were available. The contact also stated that the vehicle had a Salvage Title. The manufacturer was not notified of the failure. The failure mileage was 66,000.

- King City, OR, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving at an undisclosed speed, the check hybrid system warning light illuminated. In addition, the vehicle lost motive power. The vehicle was serviced by a dealer two months ago and repaired under Technical Service Bulletin: T6G. The contact stated that the failure reoccurred after driving the vehicle for 500 miles. The vehicle was taken to the dealer where it was diagnosed with a failed engine and the contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 138,300. The contact called the case manager at Hyundai and he refused to give any confirmation about the problem with the engine.

- Bothell, WA, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that while his wife was driving approximately 60 MPH, the vehicle lost motive power. The contact stated that the check engine warning light was illuminated. The contact stated that his wife was able to drive the vehicle to an independent mechanic. The contact stated that the mechanic retrieved various codes from the engine, and P1326 for the engine knock code and informed his wife that the engine needed to be replaced. The contact had the vehicle towed to a dealer who diagnosed the vehicle and performed a bearing clearance test and replaced the knock sensor. The dealer determined that the engine did not need to be replaced. The vehicle was repaired. The contact researched online and related the failure to NHTSA Campaign Number: 21V727000 (Engine). The manufacturer was informed of the failure. The failure mileage was approximately 122,000.

- Parker, CO, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that after his daughter started the vehicle, the vehicle began to knock and shake violently, and his daughter smelled a burning odor within the interior of the vehicle. No warning lights were illuminated. The vehicle was towed to the dealer, who determined that the connecting rod bearings inside the engine had worn prematurely, requiring the replacement of the engine. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V727000 (Engine), but the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was unknown.

- Draper, UT, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving 55 MPH, the vehicle became inoperable and made an abnormal sound. The contact parked the vehicle and then had the vehicle towed to a dealer after the vehicle failed to restart. Several warning lights were illuminated. The vehicle was diagnosed. The contact was informed that the engine needed to be repaired or replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.

- Quincy, FL, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving 60 MPH and taking an exit, the vehicle stalled. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the power relay assembly and battery needed to be replaced. The vehicle was repaired, but the failure recurred. The contact stated that the vehicle started but failed to move. The contact stated that the failure was related to TSB Number: 20-01-003H. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 142,000.

- Sugar Land, TX, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that while driving approximately 70 MPH with the accelerator pedal depressed, the vehicle started to lose power with the Hybrid and check engine warning lights illuminated. The contact veered to the side of the roadway. The contact shut off and restarted the vehicle however, the vehicle stalled and was not able to be restarted. The vehicle was towed to a dealer where it was diagnosed that the engine needed to be replaced under TSB: 209. The vehicle was repaired, but the failure recurred. The manufacturer was notified of the failure. The failure mileage was approximately 80,000.

- Atlanta, GA, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that on three separate occasions, the vehicle stalled. The contact stated that while his wife was driving at an undisclosed speed, the vehicle stalled. Several unknown warning lights illuminated. The contact-??s wife was unable to restart the vehicle. The contact stated that he was then notified by his wife of the failure and arrived at the scene to move the vehicle off the roadway. The vehicle was then towed to the dealer where it was diagnosed that the assembly generator failed and needed to be repaired. The vehicle was repaired; however, the failure recurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled with several unknown warning lights illuminated. The vehicle was towed back to the dealer where it was diagnosed that the knock sensor failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The contact then stated that three days later while driving at an undisclosed speed, there was a knocking sound coming from under the hood and the vehicle stalled with several unknown warning lights illuminated. The vehicle was taken back to the dealer however, the mechanic was unable to determine the cause of the failure. The vehicle remained at the dealer unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.

- San Antonio, TX, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that while driving at an unknown speed, the engine seized without warning. The vehicle was towed to the local dealer but was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 90,000.

- Bal Harbour, FL, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that after the vehicle was taken to a local dealer for an unknown recall repair, there were abnormal knocking, clicking, and flapping noises heard intermittently coming from the engine compartment. The contact also stated that the vehicle had reduced power steering assist and was stalling while driving uphill. The check engine warning light and other unknown warning lights were illuminated. The vehicle was taken to a local dealer on three different occasions; however, the mechanics were unable to duplicate the failure. The contact stated that the wiper blades and key fob were replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The approximate failure mileage was 15,000.

- Novato, CA, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed, the vehicle was shaking and hesitated during acceleration with the check engine warning light illuminated. The vehicle was taken to the dealer; however, the dealer was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 40,800.

- Doylestown, PA, USA

The contact owns a 2017 Hyundai Sonata. The contact received notification of NHTSA Campaign Number: 21V749000 (Exterior Lighting, Electrical System), 21V619000 (Latches/Locks/Linkages), and 21V727000 (Engine) however, the parts to do the recall repairs were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

- Visalia, CA, USA

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while her husband was driving 65 MPH, the vehicle began to shake and lost motive power. The contact stated that her husband pulled off the highway safely. The driver then attempted to re-enter the highway, there was a loud bang from the engine that shook the vehicle. The vehicle stalled. The contact stated no warning light was illuminated. The vehicle was towed to a dealer and diagnosed. The dealer service manager informed the contact that the failure was related to NHTSA Campaign Number: 21V727000 (Engine) for which the VIN was included. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 75,000.

- Union City, TN, USA

The contact owns a 2017 Hyundai Sonata hybrid. The contact stated while driving 55 mph, there was a loud knocking sound coming from the engine while depressing the accelerator pedal. The contact stated that the vehicle failed to respond as designed. There was no warning light illuminated. The vehicle was driven to the residence. The vehicle was then taken to poway Hyundai (13910 poway rd, poway, ca 92064) to be diagnosed. The contact was informed of the connecting rod bearing failure. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 80,000.

- Poway, CA, USA

Hev warning light came on when I started my car. I heard a sucking air sound at which time I turned off the car. I then restarted and no warning lights were on. Later that day while driving home the warning light came back on. I pulled the codes and it showed P0105 and P0107. Dealer inspected and found the egr pipe(C) separated from flange causing unmetered air leak. Repairs took from 09/26/18-10/02/18

- Tucson, AZ, USA

On this past labor day, which was 9/3/2018, I pulled into a gas station to refuel my car. Shut off car and had key fob with me. Pumped the fuel and got back in the car. Nothing. Car was inoperable. Pressed the start button, pressed the brakes, shifted from drive to neutral and back, pressed the brake and the start button again and nothing. Dashboard lit up like a christmas tree with the key fob light on, the check engine light on, etc. Called bluelink. They transferred me to a "phone prompt" switchboard. Problem is the phone screen would not operate as it was frozen as well. Called again, lady stayed on the phone with me and transferred me. Then when transferred she was about to hang up with the message read they were closed. Wtf? I am supposed to have roadside assistance. Rep from bluelink told me to tow the car. There was nothing she could do as it was a holiday. Honestly, I was furious. I exited the car again and shut the door. Had the fob with me. Got back in and again, nothing. Could not even turn the steering wheel. Got out again and this time checked fuses, and turned switch off then on for all fuses. Nothing again. Repeated the steps as typed earlier, and nothing. About 20 minutes later I tried it again and it started. I have had my communications center replaced once already. Android auto worked when it felt like it. My sensors for blind spots turn off at will. My rear view camera works but the sensors don't always pick up oncoming cars or pedestrians. The car is going back tomorrow yet again. This time I am pushing for lemon law. The electrical system is critical to the functionality of the car. I love the mileage I get from this car and everything else is great, but I am not running the risk of driving on the interstate and the electronic system just decides to go on a vacation!

- Naples, FL, USA

Abrupt and total loss of acceleration at full throttle at or near high RPM shift points. This behavior can be reliably reproduced by "flooring it" (all the way, including kickdown) and not letting go - as if one is executing a passing maneuver. The power loss will occur at the next shift point after kick down, and will not be cleared until the accelerator pedal is released and re-applied - or after approximately 15 to 20 seconds after the occurrence if the driver does not release the pedal. In cases where the pedal is not released after the power loss, the vehicle will surge suddenly after the condition has cleared and repeat the behavior described above. This behavior can be reproduced in any drive program mode (eco, normal, sport, ) and in both automatic and manual shift selection modes, and is especially prevalent at speeds above 45 mph where sudden full throttle command causes kickdown. The drivetrain should respond reliably when it is commanded full-throttle. A sudden power loss at a shift point during a full throttle maneuver is unsafe: (1) it disorientates the driver and; (2) causes un-commanded, unexpected, and rapid changes in driving force, weight distribution, friction, and reaction forces which could lead to a loss of control.

- St. Johns, MI, USA

1: at the beginning of October 210, when the motorway exits from East to West, suddenly the engine does not work (pictured) and the car decelerates directly from 70 miles to 30 miles. The brakes can not work fully. Step on the gas pedal must step on multiple steps to relax the throttle, depress the accelerator again, from the second move to most of the most outside high-speed, do not know do not know about the crash above the speed. Such a high speed, I go home, stop the flame, and then open everything is normal. Later, dealer repair can not find the problem, until now there are three total failures, manufacturers repair is not good, do not solve the problem, it has been dragging

- San Gabriel, CA, USA

Car has 10000 miles. Came to a stoplight and the car died. Radio was on, dash was dark. Tried to restart, no response. Tried 5 times, on the 6th time, engine came to life. Car has been at the dealer for the last week; no fault code detected according to dealer. They are in touch with Hyundai.

- Thousand Oaks, CA, USA

While driving on a 4 lane street the car suddenly gave a message 'check hybrid system shut off engine'. I was stopped at a red light so I turned off the engine. When I tried to restart the car it would not start. It took 4 tried to get the car restarted. Later that night the car would not start at all and I had to have it towed to the dealership the next day. The dealership could not find a problem and I returned to get the car. On the way home from the dealership I had shut off the car to retrieve some items and upon returning to the car again it would not start. All of the indicator lights on the display panel were lit but the car would not drive and the shift lever was locked. Returned the car to the dealership and they replaced the hpcu module. I got the car back at the beginning of September and twice it has failed to start. Each time the dashboard indicator lights will light up but the engine will not start.

- Moultrie, GA, USA