*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Electrical system
Over the last 3 months at least a dozen times the 12v auxiliary battery is completely dead after parking the car outdoors for an hour or so. This poses a safety issue, especially at night because you cannot easily access the car. You have to fumble around trying to get the key hole cover off in order to use the key supplied in the fob. Once you get access, you then have to press the 12v reset button in order to get the car started. This issue has been reported on the Hyundai sonata forums since the introduction of the 2020 sonata. At this point the dealer has not been able to find the issues as they say it has been occur while they have the car. Asking for the problem to occur while they…
Jun 1, 2024Engine
On July 15th I was driving away from work and my car suddenly stopped accelerating. I was able to get it towed to a body shop I previously had it repaired at. They said the battery system was blowing a fuse when it would become undrivable. They took it to the local Hyundai dealership where they applied a new software update related to the battery management system. This did not solve the issue, it continues to stop while in traffic and the dealership refuses to do anything to figure out the cause.
Jul 15, 2024Electrical system
Sudden failure of the electrical system with warning that the hybrid battery was in operable. I parked the car, turned it off, reset the 12 V battery, and the car restarted and operated normally. This problem with the 12 V battery needing reset has happened dozens of times while I was parked. This is the first time it has happened while I was driving the vehicle. A sudden disabling of the vehicle without warning poses a safety concern so I thought it best to report the problem. The local Hyundai dealership has heard of this problem, but they are unable to diagnose or repair it
Aug 18, 2024Unknown or other
Car shutdown (stops) in the highway driving 3 times last couple of weeks. - It first shows Battery Warning Light first and car shutdown on highway driving, and slowly park the side. It restarts with jump (it is hybrid system and allows jump inside the car). - When visited Hyundai Kirkland WA dealership, they found that there was an error in the Hybrid system, (v12 battery), but didn't know what's problem. - I left my car there 2 days but can't find the root cause even if there is a code; they said they can't repro it on highway driving. - I might have to pick it up tomorrow without any fix from them.
Jul 11, 2024Engine
Case Synopsis: My ownership includes three Hyundai Hybrid vehicles: two 2020 Sonata Hybrids and one 2022 Tucson Hybrid. Each of these cars has consistently manifested engineering defects, predominantly overheating, within a year of purchase. These persistent malfunctions have led to the vehicles being inoperable and beyond repair. As a result, we have endured financial setbacks from negative equity, costs of repairs, reduced value of the cars, and considerable inconvenience and safety hazards due to these ongoing overheating issues.
Dec 27, 2023Engine
Case Synopsis: My ownership includes three Hyundai Hybrid vehicles: two 2020 Sonata Hybrids and one 2022 Tucson Hybrid. Each of these cars has consistently manifested engineering defects, predominantly overheating, within a year of purchase. These persistent malfunctions have led to the vehicles being inoperable and beyond repair. As a result, we have endured financial setbacks from negative equity, costs of repairs, reduced value of the cars, and considerable inconvenience and safety hazards due to these ongoing overheating issues.
Dec 27, 2023Electrical system
My car's battery dies 2 or 3 times every week. I have to enter into the the car with the manual key that is inside the key fob then hit the 12v rest button to start my car. I have been to two Hyundai dealerships and they both tell me nothing is wrong. I just picked it up a week a go and it has died twice since I picked up. I see many complaints on reddit about the same issue, even some with car dying while driving. This is a serious that Hyundai needs to figure out.
Nov 15, 2023Engine
Starting in July 2023, my car has exhibited a recurring problem that seriously hampers its functionality and reliability. Specifically, the car intermittently fails to respond to unlock commands from both the key fobs and the Hyundai cellphone app. Initially, this issue occurred infrequently, happening about once a month. However, the situation has escalated, and in October 2023, it happened three times within a span of two weeks. I promptly brought my car to my local Hyundai dealership, hoping to find a solution to this perplexing issue. On the first visit, the dealership stated that they were unable to duplicate the issue, which left me deeply frustrated but willing to continue…
Oct 6, 2023
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.