2021 Hyundai Sonata: jerking or lurching

Filed Sep 17, 2026 · Fuel system · 100,000 miles · LA · 1 injury

The contact owns a 2021 Hyundai Sonata. The contact received notification of the federal safety agency Campaign: 25V796000 (Fuel System, Gasoline); however, parts were on back order. The contact stated that while driving at an undisclosed speed, the vehicle jerked with an abnormal gasoline odor inside the vehicle. An unknown warning light was temporarily illuminated. Upon further inspection, the contact became aware that the fuel level had dropped. The vehicle was taken to a local dealer where it was diagnosed with an expanded fuel tank. The contact stated that the O2 sensor, spark plugs, and ignition coils were replaced by a local independent mechanic; however, the failures persisted. The contact had headaches while driving the vehicle. Medical attention was not needed. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.

Filed Sep 15, 2026 · Transmission · TX

Transmission replaced twice and all of them continue to fail. Several Hyundai service centers are unable to determine the cause and are only able to update/relearn and replace whenever they are able to replicate the issue. The issue is that at a cold start, the car makes a popping sound, jerks and shakes. The car hesitates to accelerate. You can hear the noise of acceleration but RPM does not go past 3 and MPH doesn't go past 30mph. I'm unable to upload docs because of the upload limit. If there's another way to send docs, please let me know

Filed Jan 9, 2026 · Driver assistance, Engine · AL

Engine makes rattling and knocking noises. Transmission hesitates and jerks Suspension front struts and rear shocks are bad. Possible the isolators. Having horrible back pain when riding in car. Starter intermittently doesn't work Lane keep assistance goes over small bump in road will make car drive in opposite lane into on coming traffic. Took car to Tameron hyundai in Birmingham on the 29th of December 2025. Told them everything thats going on with the car. They did nothing about any of the issues. Car has 55,000 miles on it as that is when all problems have incurred. 60000 mile Warranty expires in February of this year.

Filed Jun 23, 2025 · MS

The moon roof made a very loud noise as I was driving down the interstate. It sounded like a loud bang. The safety risk was that I could have jerked the wheel from the scare of the loud sound. My moon roof then shattered and began to fly off.

Filed Apr 23, 2025 · Fuel system · TX

The car would excelerate while in park. While I was pressing the brakes the car would jerk forward, it would not just quietly idle. While driving the car would randomly speed up or slow down. Sometime it would sound like it was going to shut off and start vibrating.

Filed Mar 11, 2025 · Transmission · FL

My transmission on my 21 Hyundai sonata n line has failed. It began when the car needed to emergency brake when someone jump into my lane on the road. There’s grinding, and whining in the transmission along with delayed shifts, jerking and a burning smell that comes through the vents of my car upon start up. The recall on this transmission is because it may become defective. I bought the vehicle from a Honda not a Hyundai dealer in March of 2023 the recall campaign closed out Jan of 2023. According to Hyundai records show that the TCU update remedy was performed Jan of 23. However, even though that TCU update was performed, 2 years later my transmission began to fail. I brought it to my local dealer for a transmission drain and refill not a flush. Per the service manual it’s a drain and refill however they flushed it which caused the transmission to worsen. I took it back to have it diagnosed and I was told I needed my transmission replaced. Didn’t even explain why or go into further detail what was wrong with the transmission. I brought up the recall on the transmission and they did nothing to honor it. Now I’m stuck with a car with a broken transmission i can’t afford to fix and I’m gonna be forced to hand the car over to the bank. If this recall can still be honored please help.

Filed Feb 14, 2025 · TN

My car is giving a p0741 code and I was told has something to do with transmission and my car has been jerking.

Filed Jan 5, 2025 · Transmission · TX

2 years after purchasing a new vehicle, the transmission began to pop and cause the car to jerk upon a cold start, RPM would increase but the speedometer would not go over 20mph. There were no error messages or alerts. I reported it several times, and the dealership technicians could not duplicate the issue and stated that the car was driving as it was designed even after providing video proof. They were later able to partially replicate the issue when the car popped and jerked after a cold start and then replaced the transmission, however, it did not resolve the issue. 1 month after the repair the car started having the same issues. After several trips to the service department, they have still been unable to duplicate the issue even with recent video proof. Based on how the technicians enter notes, the manufacturer refuses to pursue any alternative method for figuring out what is going on. This is risky because my car, upon starting cannot be safely driven and the car will shutter upon stopping at lights sometimes.