2022 Hyundai Elantra Hybrid

This 2022 Hyundai Elantra Hybrid poses an imminent fire and safety hazard due to catastrophic high-voltage system failures. On December 11, 2025 (Mileage: 54,527), the vehicle displayed a "Check Hybrid System" warning. The dealership diagnosed a swollen 12V battery and, critically, a melted power relay assembly and melted power cable. This indicates extreme thermal overload. The dealer stated they could not repair it independently and deferred to the Hyundai Engineering Team. This is the second major high-voltage failure. On March 23, 2024 (Mileage: 34,276), the vehicle suffered a total electrical blackout while driving at highway speeds at night. The vehicle lost all motive power, interior lights, and hazard flashers, leaving the car invisible in a high-speed lane. The high-voltage battery was replaced in April 2024, yet the system has failed again with melted wiring less than 20 months later. Despite a previous recall performed in August 2024 (Campaign 9B4 - BMS Software Update for 12V Battery Over Voltage), the electrical system remains unstable. The vehicle currently exhibits signs of thermal runaway. I have been informed by the dealer on Dec 16, 2025, that the wiring has melted, yet they initially refused to provide a repair order documenting these specific findings. This vehicle is a fire risk and a threat to public safety. I am requesting assistance in having this vehicle removed from the road immediately as it constitutes a public safety hazard.

Driving on interstate at 70mph. Multiple, five or six, warnings pop up in rapid succession mostly dealing with the safety features such as distance to car in front, adaptive speed control, lane keeping. The last one was hybrid system - safely stop. The car then immediately lost all acceleration power leaving us coasting. This all happened within a few seconds. Terrifying. Luckily we had space to get over quickly. 30 miles sooner we would have been in downtown Jacksonville with no place to maneuver. Extremely dangerous. A few seconds warning then nothing. Turned the vehicle off as soon as we stopped and car was completely dead, no electrical power to anything, including flashers. Not sure how you can’t have flashers on a hybrid. Basically no warning to no power at highway speeds and then no flashers. Something is seriously wrong with this.

My hyundai elantra 2022 hybrid abruptly told me to pull over after driving on the highway for 30 minutes. The Hybrid Warning System light came up on dash and told me to pull over. After pulling over the car lost power and had to be jumped with the 12V battery reset button. Car is able to be driven again but will continue to have the same problem every 30 minutes unless the air conditioner and apple airplay or radio is off. I sent the car to Hyundai Dealership 7200 W Sahara Ave, Las Vegas, NV 89117 since [XXX] and the service technician did not contact me back for one week until I went in [XXX] to inquire. They said there is a voltage shortage somewhere but can not pinpoint yet and are working on it. I was given number to Hyundai customer service and a case manager is trying to contact the dealership to inquire the warranty before providing rental car. The dealership is not picking up so this write will go in [XXX] to try to connect case manager and get rental loaner car situated. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vehicle, which is under warranty, has shut itself off three times with an error message regarding the hybrid system. After having the vehicle towed to the dealership, they found no codes, errors, or messages to address. As a result, they won’t proceed further with troubleshooting and told me to address Hyundai directly. This is a significant safety hazard.

Horn has failed twice. The first time it was taken to the dealership and “fixed” - now it has failed again. The second issue is that the car accelerates on its own, both at a high and low rate of speed. While traveling at approximately 60 mph on multiple occasions, when the engine transitions from the electric motor to the gas engine, it will suddenly rapidly accelerate without any additional pressure on the gas pedal. While braking at a low rate of speed, the car seems to fight the brakes and will accelerate instead, propelling the car forward. This has almost caused multiple accidents. At the first occasion (Mar 2023), the dealer did a “transmission relearn” which mostly fixed the issue, but it has aggressively returned only 3 months later (one week ago) and is extremely dangerous. While trying to move to the side of the road and stop the car, the car continues the stop-go jerking/propelling forward and is nearly uncontrollable. The vehicle is currently at the dealership again and has not been diagnosed. On the first occasion they claimed they could not reproduce the issue. There is an open case with Hyundai regarding this. There were no warning lights or signals on the vehicle.

After driving the vehicle for about 5 miles I stopped to make a left turn and when I let off the brake and pressed the gas pedal the car crept forward but wouldn't speed up and the gas engine wasn't starting or even cranking. After about 20 to 30 seconds to gas engine started and the car drove fine for about 15 miles then I went to slow down and the car speed up on it own and the adaptive cruise control was off. Then it drove fine for a few more miles then I stopped at a red light and then began to make a right turn and the car did the same as before. It crept forward and the gas engine wasn't starting or even cranking. Then after 20 to 30 seconds the gas engine started and I was able to speed up some but then the engine would rev up but the car wouldn't speed up. It seemed like the transmission wasn't engaging. The car was parked for about 8 hours and then drove to the dealership without any issues. The service department at the local Hyundai dealership looked at the vehicle and test drove it without any issues

The contact owns a 2022 Hyundai Elantra. The contact stated while driving approximately 25 MPH, he depressed the brake pedal to the floor and the vehicle inadvertently attempted to accelerate forward. The contact also attempted to accelerate; however, the vehicle inadvertently stopped. The contact then restarted the vehicle and the vehicle operated as intended. There were no warning lights illuminated. The contact also stated that the failure had occurred after purchasing the vehicle at the dealer. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 7,600.