There are 4 owner-reported driver assist & adas complaints for the 2023 Hyundai Sonatain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Reported this previously, but more information was gathered, thanks to collision mechanic who guessed immediately when he heard 2023 hybrid Sonata - he said "they're notorious for it." Was at a stand still in a parking space/lot I know well. Cautious driver, watch my speed, very aware of other drivers, quick reaction time. Incident mid day, no pedestrians, distractions, no moving traffic. Vehicle doors shut, seat belt on. Not on incline. Pulled into parking spot I use weekly, spot has parking curb. Was at a full stop. Realized I had not pulled into the spot quite far enough, and attempted to inch vehicle forward. (Do not recall any warning lights, but this car usually alerts at literally anything - even shadows.) Very lightly applied gas to inch forward, slowly. Felt slight "scrape" of undercarriage on the parking curb. Put car in reverse, lightly applied gas to inch back. Car did not rev, no screeching tires, it was at a standstill previously. Was in Eco mode. All seemed normal, until vehicle suddenly launched UP the parking curb, full force, and into a building pillar directly ahead. The car never moves with that much force, I'm not a pedal-to-the metal driver. Eco mode on. No airbag deployment, injuries, etc. Sheriff took report for the building, simple incident. I couldn't make sense of it. I know how overly cautious I am while parking, what I do, and don't do. Took responsibility, but was still analyzing a week later, and explained what I remembered to the mechanic. He guessed right away. Said Sonatas were notorious for it. He said they're known for randomly applying the ebrake unexpectedly - and also randomly releasing the ebrake - and aggressively (and silently) switching from electric to gas when met with resistance, aka the parking curb. Insurance totalled the car. 2.5 years old, 17k miles. This was my 3rd Hyundai in 20 years, others were great. Discovered 40,000 Elantra hybrids, same year as my Sonata, were recalled due to "unintended acceleration."
During snow and icing conditions the forward collision radar in the logo gets covered up and becomes inoperable. This at the very time that we most need forward collision warning. It would helpful if there was electric deicing in the unit, much like the rear view side mirrors.
This is the 3rd time it happened to me. I was driving on the highway at speed 60-70 and a flash came across my dash that said emergency brake warning and my car started slowing down. I panicked and pulled over the road. The warning came on so fast and not even a min it stood on. It went off within 5 seconds. This is a safety hazard and can cause death when this happens. Please issue a recall for this to be fixed because this is dangerous to me and other drivers. I want my money back because this is the manufacturer defect or issue. They need to correct this before fatalities happen.
On a highway cruising at 70mph with the ACC (Adaptive Cruise Control ) on and following distance set at max a car from another lane turned into my lane and then continued to an off ramp. My car initially braked and then downshifted from 8th to maybe 4th and accelerated hard - scaring me and my passengers. I did add to the actions of the car by pressing the following distance button on the steering wheel a few times. I had owned a 2016 Sonata with ACC and drove over 100K miles with ACC operating. That is why i pressed the following distance button - to lessen the actions of the car when the car entered my lane. The 2016 also had a ACC setting of Fast, Normal, & Slow (I used normal). The 2023 has no ACC setting. I did complain to my dealer and he said this was normal and nothing happened. I feel this is dangerous so reported it to Hyundai Customer Service. They told me to go to my dealer.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026