Hyundai Ioniq 5 jerking problems

Filed Aug 24, 2026 · Driver assistance, Steering · NV

While driving on the freeway with adaptive cruise control and lane keeping assistance on heading east into the morning sun my car suddenly attempted to veer strongly to the left as I exited the shadow of an overpass. I was able to stop the lane assist because I had a firm two handed grip on the steering wheel. Even with the firm grip and attentive driving I nearly left my lane as the wheels suddenly and strongly jerked to the left.

Filed Jul 7, 2026 · Acceleration, Brakes · CA

1. Sudden Unintended Acceleration On two (2) separate occasions, after coming to a complete stop at a red light with foot on the brake pedal, the vehicle suddenly lurched forward on its own. 2. Brake Pedal Malfunction On more than ten (10) occasions, when attempting to stop at a light, the brake pedal briefly behaves like the accelerator for approximately 1–2 seconds. Driver has to release the brake and press it again to restore normal braking function. 3. Doors Unlocking/Opening on Their Own On more than one hundred (100) occasions, approximately 10 minutes after parking — with no key fob or phone nearby — a door opens on its own. Confirmed via mobile app notification and visual confirmation from a distance each time. 4. Apple CarPlay Connectivity Issues CarPlay frequently fails to connect. During phone calls specifically, the connection drops in and out intermittently. 5. Sticky Residue on Door Handles A sticky, adhesive-like residue is present on the interior passenger door grab handle and rear door handles. Residue does not clean off and transfers to hands on every use.

Filed Jul 7, 2026 · Acceleration, Brakes · CA

1. Sudden Unintended Acceleration On two (2) separate occasions, after coming to a complete stop at a red light with foot on the brake pedal, the vehicle suddenly lurched forward on its own. 2. Brake Pedal Malfunction On more than ten (10) occasions, when attempting to stop at a light, the brake pedal briefly behaves like the accelerator for approximately 1–2 seconds. Driver has to release the brake and press it again to restore normal braking function. 3. Doors Unlocking/Opening on Their Own On more than one hundred (100) occasions, approximately 10 minutes after parking — with no key fob or phone nearby — a door opens on its own. Confirmed via mobile app notification and visual confirmation from a distance each time. 4. Apple CarPlay Connectivity Issues CarPlay frequently fails to connect. During phone calls specifically, the connection drops in and out intermittently. 5. Sticky Residue on Door Handles A sticky, adhesive-like residue is present on the interior passenger door grab handle and rear door handles. Residue does not clean off and transfers to hands on every use.

Filed Mar 21, 2026 · Electrical · CA

I was driving in a parking lot and heard a “pop” sound like a balloon breaking. The Ionic 5 lurched and stopped. A red circle appeared on the dash and said “check electrical system.” I slowly maneuvered the car into a parking spot because there was very little power and turned off the car. I called the Hyundai dealer and they told me to have the car towed to the dealer in Palm Springs, CA. When the tow truck unloaded the Ionic 5 at the dealer, I attempted to move the car into a parking spot so it was out of the traffic lane. I started the car again it again lurched and a yellow circle came up with a turtle icon. Then another red circle appeared “check 12V battery”. The car would not move after that. I went into the Hyundai service department and talked to the service representative. He said he would take the vehicle in for service and I signed the paperwork.

Filed Jan 26, 2026 · Electrical, Steering · PA

After a loud bang (fuse blown) the car was unable to move just before I was about to turn into an intersection. The ICCU failed for the second time, all warranty repair completed prior to the incident, first failure occurred in 2024. Both failures occurred close to a when the lead acid battery failed and needed replacement. When the car was stopped and started again, I was able to drive the car slowly to the dealership located less then 1/4 mile away. The car behaved as if there was no power steering but the car still jerked the wheel around to try to put me back into the driving lane presumably because I was driving in the emergency lane. Failed component was ICCU Module 36400-1XAA0. Vehicle was unsafe because I was unable to move while about to turn into an intersection. After stopping and starting the car, the was drive-able bit mildly erratic when attempting to move the car to a safe location (out of the left turning lane). Problem was identified, confirmed, and repaired by dealer under warranty for second time. Component and vehicle inspected by dealer. Failed part sent back to manufacturer. This incident occurred without any prior warning or indication by the vehicle. There were no active recalls on the vehicle at the time of the incident.

Filed Nov 30, 2025 · Electrical, Transmission · NY

Check Vehicle Electric System warming shows up on dashboard, then vehicles enters turtle mode and then cuts power shortly with violent jerking of the vehicle. Shortly after, all system shuts down, 12V is said to be weak and car cannot move.

Filed May 19, 2025 · Electrical, Engine · CO

The car lost its ability to accelerate during rush hour on a very busy interstate while I was in the far left lane. It started by jerking really hard off and on, like a very hard brake for a second, and then normal for a few seconds, and then hard braking again. I could accelerate after the "braking". There were no warnings or errors. This continued for about a minute while I was trying to decide if it was triggered by accelerating or braking, and I couldn't figure it out. At that point, I couldn't accelerate and received a number of lights and a message to check the EV system or the electrical system. I don't remember because at that point I was trying to immediately figure out how to pull over and not get hit. Luckily, it was slow enough and traffic had just thinned out enough, having passed a popular exit, so that I could coast to the shoulder across all of the traffic. I noticed at this point that the car was in neutral. I couldn't shift into drive, however. I tried to see if turning it off and back on might help. It did at that point. There were no error messages, and I could shift into drive and drive normally after turning it off and back on. Again, I wasn't concerned with documenting an error message that I assumed would be stored. The car is available for inspection. The safety of myself and my kids and other drivers around me was at risk as we could not accelerate and I was in the far left lane to the right of an express lane and left of a lot of traffic to have to cross to get out of traffic. No, the problem has not been reproduced, and it was taken in the next morning to the dealer who found nothing wrong and no stored error codes. No lamps or messages appeared before the loss of acceleration and promptly disappeared after restarting the car. Nothing was stored for the dealer to retrieve, either. The dealer ran diagnostics and found nothing wrong.

Filed Mar 26, 2025 · Brakes, Driver assistance · OR · crash

My wife was parking the 2024 ioniq and it lurched forward at a high rate of speed and slammed into another car parked in our driveway and drove that vehicle through our home garage door. She feels certain that her foot was on the brake, but even if she accidentally slipped and appleid the brake the forward collision system should have prevented the accident additionally the impact occurred with such force it is unlikely due to human error as it pushed our very heavy 4Runner back 3 feet and thorough a closed garage door.

Filed Feb 3, 2025 · Driver assistance · SC

Condensation builds in front of the camera. The car starts jerking all over the road with no warning. There is no error other than noticing that the car cannot keep itself in the lane. When trying to disable the features, they get turned back on automatically.

Filed Sep 16, 2024 · Electrical, Transmission · VT

Our all-electric AWD Hyundai Ioniq 5 has an issue where the rear motor electric oil pump (EOP) overheats and ceases to function when the problem occurs, which disables the rear motor and effectively causes the car to become a front-wheel drive vehicle with a "hesitation" in the acceleration. This problem only occurs after a long time of high-speed driving and typically on a warm day (upwards of 70-80 degrees F). When the problem occurs, the rear motor ceases to function at all and only the front motor operates to power the vehicle forward. The acceleration is also impacted, such that when the accelerator is pushed, the car "hesitates" for 1-3 seconds before the front motor takes over the demand for power and "lurches" the car forward in a jerky motion. The symptom will last as long as the car is in an overheated state. However, if you pull the car over and let it rest for a period of time (undetermined), the rear motor will again operate normally until it overheats again. For us, this occurred once on a very hot day traveling approximately 50-60 miles on interstate travelling at speeds over 70 MPH. On another occurrence, it happened after driving the car about 200 miles (stopping for a lunch break in the middle), for about 4 hours. When this problem occurs in other cars equipped with RWD only, they lose all forward power in the car and coast to a stop even when the battery still has a charge. We've taken it to our local dealership for repair on Sept 12, 2024 (McGee Hyundai of Barre, VT) and they claim that there is nothing wrong with the vehicle. After researching the topic, I've determined it is the failing rear EOP must be replaced [XXX] and [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)