2015 Hyundai Sonata: sudden unintended acceleration

Filed May 12, 2025 · Acceleration, Brakes · IL · crash

My 2015 Hyundai Sonata has demonstrated multiple instances of unintended acceleration and braking failure: April 20, 2024 – While idling in a drive-thru line, the vehicle suddenly lurched forward without any attempt to accelerate and crashed into the vehicle in front of me. I was unable to stop it. This resulted in the other car being totaled. I took it to a Hyundai dealership afterward, but they found no definitive cause. April 4, 2025 – My daughter was driving and attempted to stop at a red light. Despite applying the brakes, the car did not stop and continued through the intersection, striking the door of another vehicle. May 12, 2025 – Today, while using cruise control set to 55 mph, the car began accelerating beyond the set speed without input. It appears the cruise control system is malfunctioning and not disengaging as expected. The vehicle currently shows no open recalls, but I found that similar issues were previously investigated under the federal safety agency action DP21003 for this model year. These incidents occurred months apart, but the behavior is consistent and extremely dangerous. I am requesting a formal investigation. The safety of my family and others on the road is at risk.

Filed Oct 2, 2023 · Acceleration, Engine · MO

I am 86 years old. I bought the car brand new so I am the original owner. I have kept the car perfectly maintained and garaged from the day I bought it. My wife is also 86. She and I are the only ones that drive the car. To date, it has 73,822 miles on it. The main issue I am having is random, unpredictable stalling and hesitation when trying to accelerate. We have also had unintended acceleration. This always happens at the worst times which causes grave concern for our safety. We have taken the care to the dealership here in Cape Girardeau, MO called Chris Auffenberg Hyundai. They've charged me $130 only to tell me nothing is wrong. I have continued to try to work with them and they now have decided a new fuel pump will fix this which is $730. I have noticed there are already hundreds of complaints on the 2015 that all say they have the same exact issues I am having but this dealership doesn't seem to care. Here is what I have read. "The most common issue in the 2015 Sonata lies with its faulty throttle control system, which can cause stalling, hesitation, and even unintended acceleration. Currently, there is no fix from Hyundai." My dealership will not acknowledge this even though it is public information. I feel like they are going to keep replacing parts and are taking advantage of me. [XXX] is the Service Manager at this dealership and I am not happy how he is handling this. Please let me know if there is any additional information I can provide. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 6, 2022 · Electrical, Engine · 80,000 miles · IL

The contact owns a 2015 Hyundai Sonata. The contact stated that after having her vehicle serviced under the federal safety agency Campaign Number: 21V749000 (Exterior Lighting, Electrical System) the exterior and interior lights would turn off while driving at various speeds, with the check engine and oil warning lights illuminated. The contact also stated that upon using the turn signals, the headlights would intermittently turn off; however, the headlights would turn on upon toggling the light switch. The contact had initially taken the vehicle back to the dealer where she was given a diagnostic fee to determine the cause of the failure. The vehicle was then taken to an independent mechanic where she was informed that the E-CVVT actuator was defective. In addition, the contact also stated that the vehicle would hesitate upon depression of the accelerator pedal or lunge forward upon depression of the brake pedal. The independent mechanic linked the failure to the E-CVVT actuator. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 80,000.

Filed Jun 22, 2021 · Acceleration · 50,000 miles · WI

The contact owns a 2015 Hyundai Sonata. The contact stated that while operating the vehicle, it would not immediately accelerate when pressing the accelerator pedal. The check engine light would remain illuminated. Also, the vehicle had experienced unintended acceleration. The vehicle was taken to an independent mechanic who reprogrammed the engine software but the failure continued to occur. The local dealer was notified of the failures. The manufacturer was not yet contacted. The failure mileage was 50,000.

Filed Dec 3, 2018 · Acceleration · 41,000 miles · IL · crash

Tl* the contact owns a 2015 hyundai sonata. While the contact was pulling into the driveway with the brake pedal depressed, it independently accelerated without warning into a two-car garage. The contact attempted to stop the vehicle, but was unsuccessful. Prior to the failure, the vehicle surged forward without warning, but the contact was able to maintain control of the vehicle. During the second failure, the vehicle crashed through a double garage door and partially into a wall at the end of the garage. The air bags did not deploy. Police report number: 18-0018173 was filed. There no were injuries sustained. The vehicle was towed by the contact's insurance company to a facility for inspection purposes. The contact stated that the entire front end of the vehicle was damaged. It was undetermined as to whether or not the vehicle was destroyed. A dealer and the manufacturer were not made aware of the failure. The failure mileage was approximately 41,000.

Filed Jan 2, 2018 · Acceleration · 12,000 miles · CA · crash

My wife believes our car had a "sudden unintended acceleration" that caused the car to lurch forward at a high speed and rear end the car parked in front of her. She kindly suggests that employee take the time to research this on the internet. Use google and type in hyundai sudden unintended acceleration. You will see stories from numerous hyundai car owners who say they have had this same problem happen. This problem is very dangerous and I fear for my wife's safety when she continues to drive our hyundai. I know we have no proof of this happening unless hyundai motor corp. "owns up" to the problem. But my wife is absolutely certain that our car suddenly unintended accelerated forward causing the rear end collision. She was attempting to park her car on a street. My wife is a very safe and careful driver. She has been driving for 30 years without having an accident, until recently. She truly believes the accident was caused by the sua and she was not at fault.

Filed Aug 9, 2017 · Transmission · 33,000 miles · VA · crash · 2 injuries

Hello, unintended acceleration: my 2015 hyundai sonata supernaturally flew forward wide open and crashed into my house. 3 or 4 airbags went off and whole front end bad. My wife and I were inside with seat belts on. We had just driven back and pulled in the driveway. I put in park. Then I decided to pull up a couple feet. Put foot on brake put in d and- wham!!- like a missile it was screaming wide open jumping forward. (my foot was on brake-not on gas-I saw it after I got sense enough to turn off key) .anyway, in 1 second we were into the deck, tires spinning and smoking and engine screaming. Smoke in the car, I thought it was on fire. I get sense enough to turn the ignition off. My wife could not get out as passenger side door bent. Finally, she squeezed out when I pulled on it. We have bruises and my back and my wife's back are out. I have looked online and hyundai has been having a lot of cars with this. I have turned into insurance but the adjuster has not come yet. I am out 500 delectable. Plus when a car is wrecked it is worth less. And I am afraid to get back in this car!!! What if we were behind a tractor trailer we would be decapitated. I have no money to pay you but my insurance is good and paid. Have you seen this before? Call[xxx]. [xxx]. Write estimate. 500 deduct. Call back if we go to dr. To get something else written up for dr. Call back if we need rental. Insurance is encompass. Agent: atkinson insurance agency. [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Aug 7, 2016 · Acceleration, Body · 16,500 miles · NJ · crash

On july 12,2016 I was pulling into a parking spot at the bank. My foot was on the brake as I entered the space. My car then seemed to make a loud noise like the engine was revering ups it then shot forward like a rocket. It felt someone had smashed behind me! Luckily there were pillars in front of the bank which prevented my car from crashing in the bank. I have found several complaints with the 2015 hyundai sonatas doing this however there is no recall. Cost of damage was $9,051. This was an extremely frightening experience!

Filed Feb 26, 2016 · Acceleration, Body · 900 miles · MD · crash

I was parking my 2015 hyundai sonata turbo sport in a strip mall parking lot. I pulled into the space and, before getting in all the way, the car suddenly accelerated to a high speed, jumped the concrete curb and slammed into a concrete wall. The air bag did not deploy and my chest hit the steering wheel and my head whipped back so I now have headaches, neck and back pain.the front bumper was damaged with marks from the concrete and though it remained on the car, it was dislodged. There was also some damage around the front headlights and the rubber part of the undercarriage.