2023 Hyundai Elantra Hybrid

I was performing a low-speed maneuver to reverse-park into my driveway. After making a right turn between my driveway and the driveway of a neighboring townhouse across the street, I came to a complete stop. When I shifted the vehicle into reverse, the vehicle did not reverse as expected and instead unexpectedly accelerated forward. I applied the brake but was unable to stop the vehicle before it traveled forward into the driveway across the street and struck the garage door of a neighboring townhouse. The maneuver was being performed at low speed. Weather conditions were clear, and the driveway surface was dry. The cause of the unexpected acceleration is unknown at this time. No warning lights, messages, or alerts were observed prior to or during the incident. Immediately following the collision, I placed the vehicle into park and applied the parking brake, at which point the vehicle came to rest. Upon impact, the driver-side front airbag deployed. Smoke and a burning odor were observed coming from the deployed airbag. The incident posed a safety risk due to the vehicle’s unexpected forward movement during a low-speed maneuver and resulted in property damage. No injuries were reported. The vehicle remains available for inspection.

The Elantra had less than 15,000 miles on it. I was driving on [XXX] at about 80MPH for about 1 hour. With no warning, while going up over a very large, high bridge/overpass (above a large outlet emptying from the everglades into the Atlantic ocean near Stuart Florida) the power totally died. A warning light came on saying the hybrid system was not functioning instructing me to pull over to the shoulder. This happened just as I crested the top of the overpass. I was able to coast to the bottom of the bridge, cross two lanes with large 18 wheeler vehicles making this challenging and park on the shoulder at the bottom of the bridge. The vehicle was towed to a nearby dealer. Their mechanic determined the "brain" between the hybrid battery and the drivers controls (the gas peddle) had failed, which disabled all power to the wheels. Had I not been cresting the top of the bridge it would have been impossible for me to move to the shoulder. This was an incredibly dangerous scenario that occurred with no warning. This failure of a key electronic component put me at extreme risk of a high speed accident on a very busy turnpike with no control whatsoever of the speed of the vehicle. There should be a redundant "brain" that would take over in this "failure" situation that would provide power at least for a limited time allowing a driver to maneuver to the shoulder. It was a miracle I was not killed. Had I been driving on limited access high speed lanes (as exist in Orlando where I live and my wife frequently drives which has no real shoulders one can safely pull over onto) the situation would have absolutely life threatening. These high speed toll lanes eliminate any ability to actually safely park and exit the car. I traded the car in (warranty covered repairs) the next day for a normal gas powered Hyundai. I will never drive a hybrid again until this type breakdown has been addressed so it can never occur. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I experienced an issue where I was driving the vehicle, and then a "hybrid system fault" message appeared on the driver information display followed by the complete loss of power. This made me have to pull over to the side of the road with no ability to accelerate out of the way of traffic to come to a stop. Once I was stopped I tuned off the vehicle and tried to turn it back on, but the vehicle would not respond so I attempted pressing the 12 volt battery reset button to the left of the steering wheel to see if this would allow me to turn the vehicle on and the car came back to life with no warning lights or messages and drove normally. This happened three more times over the course of ~1.5 hrs on my way home on the highway. I understand that things happen, I just wish there was more warning before all power was cut and the vehicle went into limp mode as this left me in a dangerous situation. The vehicle has been dropped off at the dealer and is awaiting a new hybrid battery replacement under warranty.

Auto would not go into reverse or drive gears at startup in regular parking space. Received a Bluetooth message that Drive Train would not function. Towed to dealership where problem confirmed. Electric engine ordered along with high voltage wires. Upon installation of these parts it was discovered that the Assay Harness was severely crimped during construction of vehicle at the factory and had crimped (cut) wires. Parts ordered and repaired. Hyundai refused to install new electric motor, only replaced Harness and wires. Please note this appears to be a defective auto as built at the factory.

I have been encountering a series of troubling and erratic issues with my vehicle. These problems occur under various driving conditions, including acceleration, steady-state driving, and braking. However, the most prevalent and problematic occurrences seem to transpire during acceleration and braking. During acceleration, I've observed inconsistent behavior. Sometimes, the car shifts smoothly, with minimal torque drop between gears. On other occasions, the vehicle accelerates initially but then abruptly loses all power between gears, resembling the sensation of someone engaging the clutch in a manual vehicle and shifting slowly. This results in a temporary power loss lasting 1-2 seconds, followed by an over-revving and clutch slip, leading to an unintended surge in acceleration. The issues I've encountered during braking typically begin with a chattering noise and vibrations that seem to be an imbalanced or shocked reciprocating mass, I can assume maybe one of the clutches/flywheel . This is often followed by decreased brake pedal linearity, requiring increased brake pedal pressure to stop. This normally results in an unintended aggressive forward jerk just before coming to a stop, akin to someone releasing a clutch on a manual transmission vehicle too quickly when downshifting while the engine speed is too low. The steady-state symptom occurs less frequently but occasionally involves a momentary loss of power, almost resembling a backfire without the noise. I can only assume that this is related to brief disengagement of the clutches. I sought assistance by taking my vehicle to a local dealership who kept it for a little over a week. Unfortunately, they were unable to reproduce these issues, and no actions were taken to address my concerns. This unpredictable behavior from the vehicle often catches me and my passengers off guard and really makes it hard to trust the vehicle.

On my way home waiting for the green light the car would not respond to the accelerator.. the engine would rev up on the tachometer but would not move. Finally the engine responded and the car took off reaching 83mph in a matter of seconds. After release of the accelerator I was able to get the car under control. At the next traffic light even with my foot on the brake the vehicle lunged forward nearly striking the car in front. I put the car in neutral and was able to use neutral and low gear to get it back home...the car was towed to the dealership the next morning.