Driving, car started making a weird sound followed by a warning light on dashboard with dinging sound to correlate... car became difficult to gas, vehicle motion was lagging where I just knew I had to pull over Bc this car was going to literally stop began to slowly (Bc that-??s all car would allow) to proceed forward and I was forced to come to a haunt as I pulled onto side of highway. I then could no longer move it. Turned car off for minute then returned to try to start again, car would not accelerate at all nor turn on fully.. I was forced to wait hour to get a tow... took to shop, no problem such was found, car started & ran again... this is 3 days later the car again continued the same exact pattern & I was unable to drive any further and forced to once again to get tow. This has to be something of bearings with engine, this car mode is not on list but IT certainly is an issue that I believe is related & should be rectified by Hyundai.

- Islip Terrace , NY, USA

The vehicle's fuel gauge (type C) does not accurately adjust for changes in the amount of gas in a timely manner. It normally takes 2-3 days for the gauge to move to full tank even though it is full. Same problem from 1/4 to 1/2 tank, etc. For example, I noticed the panel said I had 11 miles to empty on Friday. The gas gauge showed otherwise. I wasn't near my usual fill station, so I put 5 gallons of gas in the car. It is now Wednesday (5 days later). The gas gauge moved slightly yesterday to almost 1/4 tank, but the fuel tank warning went from 11 to 0 miles left to empty (see attachment). I drove on the highway each day and in the city. I purchased this car July 2020 with a full tank. This problem became evident in Aug 2020. After refilling the tank, the reader showed 111 miles to empty. I informed Hyundai agent of the issue, who had no idea why this was happening. The guage and fuel tank reader finally adjusted after about 3 days. I had 449 miles on the car at that time. I now have over 4,000 with same problem. Apparently, something is faulty, but I don't know what. Auto dealer is baffled. This issue could result in a real fuel shortage while traveling with no gas station nearby.

- Chesapeake, VA, USA

Following a firmware update to the obc for a recall, the vehicle transmission now has a severe delay responding to driver input. The transmission in this vehicle has electronic shift with pushbuttons. Previous to the firmware update, the transmission would respond instantly to driver input from these buttons. Following the firmware update, the transmission takes two seconds to respond. This delayed action prohibits driver emergency shifting, creating severe risk of an accident. In my vehicle, I recently was almost involved in a traffic accident when the delayed response from the transmission caused my vehicle to reverse into the opposing lane of traffic as acceleration was attempted thinking the vehicle had shifted into drive. Upon entering the active opposite lane of traffic, emergency accident avoidance was prohibited by the delayed response of the vehicle shifting into 'drive' in order to move the vehicle from the opposite lane of traffic. Previous to this instance, there have been delays in vehicle shifting which have nearly caused an accident when the driver attempts to place the vehicle in 'park', but the delay causes the vehicle to move forward as the driver removes their foot from the brake, and the car moves forward toward stationary objects and people. This has been reported to Hyundai and they have not responded yet. Furthermore, other obvious firmware issues in the vehicle have been identified, one in a different safety system.

- New Port Richey, FL, USA

I own a 2020 Hyundai Sonata. I purchased the car on January this year the miles in the car is 700 miles. A month after the car star giving me problem with break. Somehow the car applies the emergency break by itself and doesn't want to move. When I drive the car suddenly stop by itself and giving me message like: To move the car put your seat belt, lock all the door even when I have my seatbelt and doors are lock the car do that when ever the less I expected. I took the car three time for repair and update and the car give me the same problem. The dealer gave me a loaner another 2020 Sonata and have the same problem. This is a very dangerous issues because if is rainy or snowing. The dealer doesn't find anything wrong with the car when they drive the car. I told them that happen when the lees expected

- Brooklyn, NY, USA

The contact owns a 2020 Hyundai Sonata. The contact stated that while driving at various speeds, the passenger's side blind spot detection system failed to activate. The contact also stated that the forward collision warning light intermittently activated while stopped at a red light. The contact stated the rear brake assist activated intermittently on several occasions. The vehicle was taken to nassief Hyundai located at 1059 oh-46 North, jefferson, oh 44047, and preston Hyundai of sharon located at 1251 E state St, sharon, pa 16146, where the mechanics were unable to duplicate failure. The vehicle had not been diagnosed nor repaired as of yet. The manufacturer had not been informed of failure. The failure mileage was approximately 623.

- Niles, Oh 44446, OH, USA

The contact owns a 2020 Hyundai Sonata. The contact stated that while driving at approximately 55 mph, the vehicle shifted into safe mode and lost motive power. The vehicle was taken to St. Charles automotive located at 5601 veterans memorial pkwy, St peters, mo 63376, (636)441-4481 but was not diagnosed nor repaired. The manufacturer was not contacted or informed of the failure. The approximate failure mileage was 1,500.

- O'fallon, MO, USA