2020 Hyundai Ioniq Hybrid problems

Filed May 12, 2026 · Electrical, Steering · FL

While attempting a slow right turn from a complete stop at an intersection, I heard a loud thunk sound followed by an immediate loss of power steering response. The steering wheel spun freely with little resistance while the front tires did not respond proportionally. I was able to safely pull over. Upon restarting the vehicle it produced an abnormal wheezing sound suggesting additional mechanical stress. At the time of the failure the vehicle had approximately 40,000 miles, which I believe represents a premature failure for a safety-critical steering component. The vehicle was brought to a Hyundai dealership for inspection. The dealer pulled diagnostic fault codes, found none, performed a 20-minute test drive, and returned the vehicle stating they could not find anything wrong. No physical inspection of the steering components was performed. The failure condition — a slow full-lock turn from a complete stop — was never specifically replicated during the dealer's test drive. The problem has not been confirmed or repaired by the dealer. The vehicle is available for inspection. My safety and the safety of other drivers was put at risk by the sudden and unexpected loss of steering control. No warning lights appeared prior to or during the failure.

Filed Mar 31, 2026 · Electrical · CA

The charge controller failed twice and one of the times I was out on a dangerous road where there wasn’t a safe spot to pull over. It was very sketchy.

Filed Jan 29, 2026 · GA

The horn on my 2020 Hyundai Ioniq has stopped working. I checked the fuses and they are all good. Hyundai currently has several other models with recalls or at least known to fail. Yes my vehicle is available for inspection and no I have not had it looked at yet… dealer wants to keep it for 3-5 days to diagnose and further, given the nature of the issue, I don’t feel I should be responsible for any fees involved in doing so. It poses me a major safety concern as I cannot warn other cars of potential collision etc. Unfortunately, this problem does not have any type of warning message to let you know. I had to find out by trying to use my horn when someone almost hit me. This appears to me as a Hyundai manufacturing issue that also affects the Ionic line.

Filed Aug 22, 2025 · DC · fire

See attached document for complaint

Filed Jul 23, 2025 · Transmission · 60,000 miles · CA · 1 injury

The contact owns a 2020 Hyundai Ioniq Hybrid. The contact stated that while idle, releasing the brake and pressing the accelerator, the vehicle would jolt forward before accelerating. The failure would occur intermittently and had become progressively more pronounced. There were no warning lights illuminated. During the most recent occasion, the vehicle jolted forward so aggressively that it caused the contact to have whiplash. The contact had to refrain from work due to the whiplash symptoms sustained, such as neck pain and nausea. The vehicle was taken to the dealer twice, and the dealer was not able to diagnose the cause of the failure. The dealer was able to experience the failure described when inspecting the vehicle. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed the vehicle was not covered under warranty or recall. The manufacturer filed a complaint. The failure mileage was approximately 60,000.

Filed Mar 17, 2025 · FL

Car has two horns, both STOPPED working completely about 2 1/2 years ago and were replaced by the Hyundai dealer in Florence, SC. High pitch horn failed again about 1 year ago, and low pitch horn has now failed. Local Hyundai dealership in Pensacola, FL npow wants $800 to replace what should be fully covered. Car now has 75,00 miles so they say it us out of warrenty. But, a safety issue on a known problem (per Hydai frum on line and personal experience) should be fully covered by Hyundai.

Filed Jun 30, 2024 · Brakes · GA · crash

The Hyundai Ioniq was designed with a dual clutch system for the electric motor and gas motor. This was done to disengage and engage either separately when necessary for low power, regen braking, etc. However, this design heavily impacts the behavior of the brakes and safety of the vehicle overall. When the brakes are applied, the ECU will turn off the gas engine to conserve gas in regen braking mode. Additionally, the ECU will downshift the transmission. Downshifting the transmission and disengaging the gas engine become an issue because conducting both actions removes significant resistance in braking. Causing the vehicle to lurch when the downshift occurs while also increasing stopping distance. This downshift can be felt when braking as both loss of brake power and vehicle lurch. The system also does not account for this brake power loss by increasing brake booster response.

Filed Oct 25, 2023 · Driver assistance · 37,859 miles · WA · crash

The contact owns a 2020 Hyundai Ioniq. The contact stated that while driving 70 MPH with the adaptive cruise control and lane keep assist features activated, the check engine warning light suddenly illuminated and the steering wheel seized causing the driver to lose control of the steering and the vehicle crashed into a concrete barrier. After restarting the vehicle, the check engine warning light was no longer illuminated and the vehicle operated as normal. No injuries were reported and no police report was taken. The cause of the failure was not determined. The manufacturer and local dealer were not notified of the failure. The failure mileage was 37,859.

Filed Jun 12, 2023 · Electrical · AZ

***2020 HYUNDAI IONIQ TURNS ITSELF ON, WITHOUT HUMAN ASSISTANCE OR MODERATION. HUMAN DOES NOT NEED TO BE IN THE CAR FOR THIS TO HAPPEN, MEANING IT COULD OCCUR 24/7, SANS DRIVER, AND IS A SAFETY ISSUE.*** *Months of random electrical odd events. Example: the car does not know it’s off or Not shifting correctly *June 6, 2023 - 8am - I entered the car and got settled. The steering wheel is locked…it was not like that the last time I was in the car. I turned the car on, shifted to reverse, and the steering wheel remained locked. I couldn’t fix it so I decided to get out of the car and call for service. *June 6 2023 - Attempting to leave the car. Put the car in park, set the parking break, turned car off, and opened door to get out. When my left foot touched the pavement the Ioniq turn itself back on. I thought I had messed up but nope. I took several videos. I could not leave the car bc it would NOT STAY SHUT OFF. *June 6, 2023 - Called Hyundai service. They could do nothing but had service drivers out and I would get a call back, meantime I had to stay inside the running car. I kept trying the ignition button to get it to stay off. FINALLY randomly unlocked the steering wheel so I drove to the service center. *June 6, 2023 - Hyundai has had my car for 7 days without being officially written up and service started. I cannot get an update from them and have no loaner. I will be taking an UBER there tomorrow to check in person.

Filed Mar 28, 2023 · Body · 46,650 miles · FL

The contact owns a 2020 Hyundai Ioniq. The contact stated that while driving approximately 35 MPH a sudden booming sound occurred near the front passenger’s side of the vehicle. After stopping to inspect the vehicle it was discovered that the front driver’s side wheel well and bumper dislodged and was rubbing against the front passenger’s side wheel. The contact was able to adjust the damaged body part from rubbing against the wheel and continued to drive the vehicle. The cause of the failure was not yet determined. The local dealer and manufacturer were not yet notified of the failure. The failure mileage was 46,650.