Loss of power on highway or during normal driving possibly due to oil pan assembly according to odi 11481745. This has cause near-miss accidents on highway on ramps a number of times. Separate issue, when the outside temp is at our below 30?F the starter can fail to turn over resulting in a car that won't start even with jumper cables applied.

- Erlanger, KY, USA

The incident occurred within my garage when I attempted to start my car and the starter went out producing a burnt smell and spark within motor. After letting the car cool down I put the car in neutral and had it towed to the nearest garage. I thought vehicle could have started a fire inside my garage and home. I have contacted the manufacture and initiated a case incident report awaiting a call back from Hyundai motor company. There were no waring lights or issues with the car the car before incident. The vehicle is under warranty but the dealership stated, they could assist since I took the car to a garage and had a mechanic work on vehicle. The disposition was the vehicle had a faulty started starter, but this incident has a huge safety flag.

- Lithia, FL, USA

On May 03, 2022 at approximately 3:30pm I was traveling southbound on Arizona State Route 101 in Tempe, Arizona. I was going about 75 mph, and without no warning my car shut off. I had to pull off to the shoulder of the highway to avoid being struck by other vehicles, and also incase I lost control. My Hyundai picked up nails on 3 of the 4 tires in the process. I barely avoided a fatal accident due to the defect, which I had no idea about.

- Phoenix , AZ, USA

I was stopped at a red light and when it turned green, I began to accelerate. The car stuttered and the check engine light was blinking. I pulled over and had Autozone run the code. The code is P1326, engine knock sensor. It was put into limp mode and it shook pretty bad in lower gears while accelerating. I had to pull over and let several cars pass me as I couldn't go above 2,000 RPMs. When I got home, I called roadside assistance and had it towed to the nearest dealership. That was this morning (5-4-2022). I just purchased this car used in the beginning of March. I don't have all the records since I just purchased the vehicle used. I just changed the oil last week.

- New Brighton, PA, USA

The shark fin antenna assembly becomes dislodged from its base very easily and can fly off while driving or scraping ice off the roof with minimal force. Hyundai should do a better job attaching the outer shark fin plastic cover to its base.

- Winthrop , MA, USA

The lock for the trunk, open automaticly, it stay lock and wont open....

- San Juan, PR, USA

Car will not start when key turned in ignition with no sound when the weather is under 30 degrees. Had it in the dealer last week and they could not find the problem. Still happening so its back in the dealer for 3 consecutive days and I cannot talk with anyone in the service department. Phone just rings then cuts off. Have done research and found other 2018 Sonata ES owners with the same problem and the solution has been the ignition starter and solenoid. When replaced the starting problem was solved. Three days now and have not heard form the Hyundai repair shop in bowie, md. Still have my car. Such inefficiently with mechanics now days.

- Upper Marlboro, MD, USA

I rent this car from tower rentals I paid 1300$ day before easter no one would come get it fix it I'm in queens I got money tolls and gas took to their repair shop in bronx yesterday after 4 hours they told me nothing wrong sent me home after they did 50 min inspection which it failed. They have caused me tons of money parts jumps travel time loss of work and do not care or reimburse me the car sits X time won't start again without jump I sent numerous emails asking my yearly receipt all I've paid still not given it to

- East Elmhurst, NY, USA

I was driving my car at about 45mph on my way to work on a highway road and out of no where it jerked and the check engine light started flashing. Car would not accelerate above 2,000 rpms. When the car jerked, it was so sudden it injured my lower back. My back has been very sore since this incident. I then took to dealer and they said it was a known issue and Hyundai had not recalled my specific car. Dealer was able to replicate the issue. The cleared the check engine light and sent me on my way. One mile down the road exact same thing happened. Car is currently at their shop with no eta of repair.

- Topeka, KS, USA

This car has a mind of it on when I turn on heat the radio station goes static very bad engine light keep coming on go to dealership they keep on reset instead of fixing it yesterday my starter burn out.just out the blue with no warning sign it was going out

- Hampton, VA, USA

My 2018 Sonata will not start when temp drops below 20 deg F. it has happened 3 times this winter and when it warms back up to 40 to 50 degree it will start. When I turn the key on all the lights on the dash light up like normal. I can move hear selector and turn wheel. But the starter will not engage nothing is heard not a click or a shirt. Is this common problem?

- Schenectady, NY, USA

Entertainment screen turns off after a while and will reset or I have to tap it and make sure it goes back on and does this over and over at times. Smoke comes out exhaust when passing a car sometimes

- Tucson, AZ, USA

The contact owns a 2018 Hyundai Sonata. While driving, the visual alarm system and automatic braking system did not work. The vehicle was taken to two different dealers, including lake norman Hyundai (704-274-3145, located at 20520 chartwell center dr, cornelius, nc 28031) where the technician stated that road tests were not allowed on such vehicles. One of the dealers provided the contact with tsb: Group brake 18-br-001. The manufacturer was made aware of the failure and stated that nothing could be done. The vehicle was not repaired. The failure mileage was approximately 4,700. The VIN was invalid.

- Denver, NC, USA

On five separate occasions while driving on the highway the vehicle will loose power and ability accelerate with a flashing engine light. These incidents have almost caused me to be rear ended three times because you are not able to accelerate above 60mph in rush hour traffic on a busy interstate and the ability just stops quickly with no warning. The vehicle also has been having the rpms drop to 0 and shoot back up while braking, and while driving it is tough to accelerate and then you will feel a noticeable 'kick' and the rpms will shoot up drastically before it will accelerate. I have had 2 software updates done, a new wire harness, knock sensor cleaning and a knock sensor replacement. The engine code is always the same 1326.

- Phoenix, AZ, USA

June 2019, at about 11,500 miles took car in for an oil change and was told due to a recall, a software update needed to be done. At about 13,500 miles, engine light came in, car was jerking in motion on highway and lost power. Car would not accelerate last 62 mph. Car was serviced and block sensor wire harness was replaced. Car was returned and again while in highway engine light came on, lost power, car was jerking while child was in the car and while car was in motion. Car was serviced and block sensor was replaced. At about 18K miles, engine light came on while on highway and again with child in the car and car lost power and also was jerking while in motion. Car was serviced and engine replaced. 3000 miles later, again while in the highway, engine light came on, car lost power and was jerking and would not accelerate. Car was serviced and the following day, while on the expressway in Chicago, the engine light came on and the car lost power and was jerking hard while in motion. Car was towed to dealership in rockford il. After the 4th attempt to repair, lemon law claim was filed with Hyundai motor America which they denied due to mileage. This car is unsafe to drive. When it loses power there is no warning, no brake lights come on to notify cars behind, and while in the busy expressway in Chicago was very dangerous. Also dangerous to have children in this vehicle. Hyundai motor America refuses to do anything but repairs and is ignoring the dangerousness this problem. This occurred all 5 times while the car was in motion. The code that reads for this is 1326 per the service records.

- Beloit, WI, USA

Check engine light came on;engine error code 1326. Car began stalling. Got it to dealer who knew it would need a new wiring harness possibly a new engine. This is dangerous will get someone killed. This happened right after exiting the highway pulling onto the service road.

- Richardson, TX, USA

"multiple warning lights are coming on the dash for ABS failure."cause: 5891R00 hydraulic module assembly replaced. "scan test codes C1741, C2402, C1360 diag system. Line case number 2019080600434 perform voltage and ground test per tech line found ABS hydraulic unit internal failure, replaced ABS hydraulic unit, perform all calibrations and variant coding clear codes, reset adaptives. Problems of yellow light coming on on dash was during accelerations and turning cruise control

- Keller, TX, USA

The contact owns a 2018 Hyundai Sonata. While driving 50 mph, the headlights flashed and the brake and reverse lights went out. The contact could not see the road and smelled an abnormal burning odor. The vehicle was taken to stanley parma Hyundai (7115 brookpark rd, parma, oh 44129, (216) 749-2525) where it was diagnosed that the knock sensor needed replacing. The vehicle was repaired five times; however, the failure recurred each time. The vehicle was then taken to elyria Hyundai (845 leona St, elyria, oh 44035, (440) 374-8700) where it was diagnosed that the computer needed an update. The vehicle was not repaired. The manufacturer was made aware of the failure and provided a case number. The failure mileage was 70,000.

- Eliria, OH, USA

The contact owns a 2018 Hyundai Sonata. While exiting the interstate at 60 mph, the vehicle went into limp mode, jerked, and failed to accelerate. In addition, the check engine warning indicator illuminated. The vehicle was towed to auffenberg Hyundai (located at 1300 central park dr, O'fallon, il 62269, (618) 622-9001) where it was diagnosed that the nox sensor failed and needed to be replaced. The contact stated that the vehicle was repaired for the third time. The contact also stated that the technician reset the computer, the wiring harness was replaced, and the nox sensor was cleaned; however, the failure recurred. The vehicle was also taken to an unknown dealer in tx, but the failure code could not be recreated. The dealer reset the computer and replaced the nox sensor, but the failure recurred. The manufacturer was notified and provided case number: 15894913. The approximate failure mileage was 15,000.

- Caseyville, IL, USA

I was exiting the freeway and lost power, could not accelerate, blinking engine came on and on my screen it said "a possible condition with you engine control system has been detected. A full system check recommended to be done when convenient. Please contact you local dealership for an appointment" I was able to get to an area and have it towed. This could of been very scary and dangerous if I had still been on the freeway doing 70! I could not have driven it, it was missing and wouldn't get above 20-30 mph. I had the knock sensor software update done at the dealer the week prior to this happening. The dealer is saying the wiring harness needs replaced and will not be available until the end of the month! many on here have waited months I hope that is not the case. I've read numerous complaints on here and other sites that this is happening after the update. My car seemed fine before they did the update. Some people need new engines! how do I know that my engine doesn't have damage, I assume that Hyundai knows something since with the sensor update they extended my 100K warranty to 120K. It said the sensor is to help catch possible rod bearing wear and extends warranty must mean they expect engines to have problems! what is going on here and why isn't there any official recall? my car only has 20K I don't expect this kind of problem. I leased cars for many years but since I'm close to retiring I bought this wish I was still leasing so I could get out from under this in 2 years!

- Columbia Station, OH, USA