Hyundai Ioniq Reliability by Year
Best & Worst Years, Problems & Recalls — NHTSA Data

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The contact owns a 2020 Hyundai Ioniq. The contact stated that while driving at undisclosed speeds, the vehicle stalled. No warning lights were illuminated. The contact was able to restart the vehicle. The vehicle was taken to the dealer where it was diagnosed and determined that the battery had overheated. The vehicle was not repaired. The contact stated that on a separate occasion, while driving at undisclosed speeds, the vehicle stalled. No warning lights were illuminated. The vehicle was taken back to the dealer; however, no cause for the failure was found. The contact stated that on the way home, there was an abnormal ticking sound was coming from the vehicle. The contact stated that the electrical system on the vehicle had failed, and the doors and the trunk failed to open. No warning lights were illuminated. The vehicle was taken to the dealer; however, the contact was unsure if the vehicle was repaired. The vehicle remained at the dealer and had not been driven since the failure. The manufacturer was notified of the failure. The failure mileage was approximately 22,400.

The system lost its ability to audibly warn me of various conditions that were a risk to everybody in the car. Examples of alerts we could not here were: blind spot collision warning, cross traffic while backing up, driver attention alert when hands are not on the steering wheel, and audible blinker sounds. After the loss of the audible alerts, I nearly collided with vehicles that were in my blind spot because the alert was no longer present.

What component or system failed or malfunctioned, and is it available for inspection upon request? Braking and acceleration control, yes How was your safety or the safety of others put at risk? The car continued to move/accelerate after depressing the brake pedal, and upon applying additional force continued to move forward, this could lead to a situation where a diver is unable to stop their car when they need to. Has the problem been reproduced or confirmed by a dealer or independent service center? No Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle was inspected by a Hyundai service center on 10/09/2025 (For a similar concern and related damage) and the event occurred on 10/12/2025 Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There was no warning lights, symptoms (other than the prior occurrence of this issue). The issue was first noticed on 10/3/2025 when the vehicle accelerated while the driver was depressing the brake and damaged the undercarraige.

While attempting to park and depressing the brake the car made a sudden acceleration without input and hard braking did not slow the car. The car then impacted the curb. On another occasion while stopped at a red light the car began to move forward while the break was depressed. Pressing the break with additional force did not stop the vehicle and it continued to roll forward.

1. Component/System Failure: The airbag system failed to deploy during a collision. Yes, the vehicle is available for inspection upon request. 2. Safety Risk: On August 5th, while driving on the highway, my vehicle was involved in head collision. Despite the severity of the impact, the airbags did not deploy. This malfunction exposed me to significant physical danger, as I was left unprotected during the crash. 3. Problem Confirmation: No,I was not aware of the malfunction of the airbags system. 4. Inspection Status: Not yet, I contacted Hyundai America to investigate the malfunction of the airbags the insurance company did their assessment; they determined the car to be a total loss due to the extent of the damage and the car is available for inspection. 5. Warning Signs: There were no warning lamps, error messages, or other symptoms indicating a malfunction in the airbag system prior to the accident. The system appeared to be functioning normally until the moment of failure.

The contact owned a 2019 Hyundai Ioniq Hybrid. The contact stated that while driving at an undisclosed speed at night, all lights, including the headlights. As a result, the vehicle veered off the roadway into a ditch, coming to a complete stop after colliding with a sign. The air bags did deploy. No warning lights were illuminated. A police report was filed, and injuries were reported. The contact was transported to an area hospital and treated for intracranial hygroma, hematomas in both legs, burns, and various bruising. The vehicle was not taken to the dealer or an independent mechanic but instead towed to a towing yard. The vehicle was not repaired upon being declared a total loss. The manufacturer was notified of the failure but was unable to assist. The failure mileage was 51,000.

What component of system failed or malfunctioned? Sudden deceleration, not sure what system this is a part of. Is it available for inspection upon request? No, I don't know what is causing the problem so have not been able to have the specific system looked at. How was your safety or the safety of others put at risk? I have been driving on the highway and experienced sudden deceleration of the vehicle multiple times over the past four years. Not being able to control deceleration puts me and the people around me at risk for collision. I am also at risk of being stranded far from home where assistance may not be readily available. Has the vehicle or component been inspected by the manufacturer, policy, insurance representative or others? Yes, by four separate dealerships. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Check engine light came on shortly after deceleration, battery power could then be seen at a critical low.

This car, along with several other models of Kia and Hyundai, are unsafe due to the ease with which they can be stolen. Hyundai/Kia must recall all of their vehicles that lock proper anti-theft mechanisms in the ignition, steering column, and drive train. Until this is done, all American auto dealers and insurance companies must refuse to sell and insure any new Hyundais and Kias.

The contact owns a 2019 Hyundai Ioniq Hybrid. The contact stated that while driving 72 MPH with the cruise control activated, the cruise control button became stuck, causing the vehicle to accelerate unintendedly. During the failure, the cruise control could not be disengaged using the cruise control button or while depressing the brake pedal. The contact stated that the vehicle would decelerate while depressing the brake pedal; however, after releasing the brake pedal, the vehicle would independently accelerate. The contact was able to stop the vehicle and turn off the vehicle to disengage the cruise control. The following day the failure recurred. The vehicle was taken to the local dealer who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not yet contacted. The failure mileage was 69,000.

My 2019 hyndai ioniq electrical system stopped working and results in the front door claiming that is not open. An internet search showed that this is common many hyundais and in particular the ioniq. The issue with this is 1) there is no way to know how bad this electrical issue, 2) since the door may or may not be open, the risk of the door opening while driving is present, and 3) all other notifications on my dash are no longer usable; i have no way of knowing fuel left, mpg, or any other safety warnings on the dash. Finally, the issue creates a constant beep that does not stop. This is a safety issue seeing as it is so loud, it makes being aware of the sounds around us nearly impossible to hear.

The contact owns a 2019 Hyundai Ioniq. The contact stated that while attempting to park into her son's parking pad, the vehicle independently accelerated reverse while in the reverse(R) position. The vehicle initially hit a gutter on the side of the house; as the vehicle continued to accelerate, the contact forcefully depressed the brake pedal but to no avail. The vehicle continued to accelerate in reverse as it hit a porch column which swung the vehicle around and off the parking pad. The vehicle then hit a tree as she stood up on the brake pedal which finally stopped the acceleration. The contact immediately placed the vehicle into park and exited the vehicle. Once the acceleration stopped, her son parked the vehicle and informed her that several warning lights and warning chimes had sounded as he parked the vehicle. The contact sustained minor soreness and emotional trauma as a result of the failure but did not seek medical attention. A police report was not filed and the vehicle had yet to be towed. Her son's porch column and downspout gutter were damaged as a result of the failure. The manufacturer was notified about the failure and informed her that there were no recalls on her vehicle. The vehicle had yet to be diagnosed or repaired. The failure mileage was approximately 33,500.

One morning, my father turned on the car. It was still in Park. He and my mom heard a noise, as if my dad was pushing on the gas pedal, but he was not. They turned off the car, turned it on again, and everything seemed fine. After driving for a bit, my father was back home and parking the car. Because of the way the parking lot is, you have to go slowly, less than 10 miles an hour, pushing on the gas a little to go up and incline and then turn right to slide into the parking spot as you break to finally park. As he was pulling into the parking spot, the car suddenly accelerated uncontrollably, and crashed hard into the building ahead. It broke pieces of the building, and the entire front of the car is totaled. My parents saw fire under the hood and my mom suffered a hand injury. They are otherwise unharmed. I know Unintended Sudden Acceleration was an issue with Ioniq EVs from 2019. It looks like it is happening to the hybrids as well. Thank you for looking into it.

07/13/19 Car experienced uncontrolled breaking while traveling at 70 mph on President George Bush Tollway, Texas. All dashboard lights came on and only went off when car turned off then on. 09/26/21 Car experienced uncontrolled breaking while traveling at 70 mph on I-75 in Georgia. All dashboard lights came on and only went off when car turned off then on. 11/13/21 Car experienced uncontrolled breaking while traveling at 70 mph on I-35 in Texas. All dashboard lights came on and only went off when car turned off then on.

I am not sure who to report this to, but NHTSA and Hyundai corporate office both report the car as having no recalls. The local dealership says it has 3, 2 for computer errors (my car currently has a computer error). When I asked the main Hyundai support people about this, they stated local dealership and the corporate office have different systems. I can concerned Hyundai is hiding recalls from the public by keeping them on a separate system at dealerships and not on the main website or NHTSA.

RECALL WORK WAS PERFORMED TO FIX ANY POSSIBLE OVERHEATING ISSUES. A MONTH LATER I NOTICE ME HEATER NOT WORKING AND THEN IT STARTS OVER HEATING AND SMOKING FROM THE BACK, I TAKE IT IN AND THEY CLAIM THAT IT'S JUST A BUBBLE IN THE RADIATOR. ON 04/21/2020 ABOUT A MONTH LATER WITHOUT ANY WARNING LIGHTS PRIOR IT FLASHES THAT MY ENGINE IS OVERHEATED AND LARGE CLOUDS OF WHITE SMOKE STARTS COMING OUT OF MY EXHAUST PIPE. HYUNDAI SERVICE DEPARTMENT SAID THAT BECAUSE OF A FAULTY SWITCH COOLANT LEAKED INTO MY ENGINE AND THE ENGINE IS NOW RUINED AND NEEDS TO BE COMPLETELY REPLACED.

FOR THE SECOND COLD MORNING THIS YEAR MY IONIQ STALLED. I WAS PARKED IN MY DRIVEWAY. TEMPERATURE WAS -3F, I PRESS THE POWER BUTTON, CAR TRIED TO START AND STALLED THREE TIMES IN A ROW THEN GOT A CHECK HYBRID SYSTEM WARNING MESSAGE. I TURNED THE CAR OFF THEN ON AGAIN AND IT STARTED TO STALL, I DEPRESSED THE ACCELERATOR TO KEEP A HIGH IDLE FOR A MINUTE. THE CAR RAN NORMAL DURING MY 7 MILE COMMUTE AFTER INCREASING THE I.

Supplemental to my complaint filed April 18, 2026 regarding Dick's Hillsboro Hyundai (dealer code OR035). The dealership's Service Manager (Robin Farr) provided me with an HMA training report from Hyundai's internal system. Every staff member is listed at "Certified": the baseline tier. No one is above this level. No EV/HEV-specific certification is indicated for any individual. Despite this, the dealership confirmed by phone they could service a 2019 Ioniq PHEV, then performed ICCU/DC-DC converter diagnostics (a hybrid electrical system procedure) and a 12V battery installation in the boot area adjacent to high-voltage components. The vehicle was returned with the hold-down bracket unsecured and retaining bolts missing which was only discovered when my car was assessed by a second Hyundai dealership after I had driven a significant distance. Hyundai's own shop manuals state: "Never allow technician to work on high voltage systems who are not wearing personal protective equipment." Hyundai TSBs for hybrid repairs require insulating gloves rated at 1000V AC/1500V DC. HMA's CPO form (HMACPO0601) requires an "EV/HEV Inspection certified technician" for hybrid-specific work. The ASE xEV Safety Standards state employers "SHALL verify" technician ability to work on HV systems. The dealership's website also claims its service department includes "Master technicians." The HMA training report shows no staff at that level. The Ioniq PHEV boot area contains HV wiring (DC 240V-360V). A loose metal bracket contacting terminals or HV wiring could cause a short circuit, arc, or fire — the type of hazard EV/HEV training exists to prevent.

Following a 12V auxiliary battery replacement at Dick's Hillsboro Hyundai [XXX] , April 3, 2026), the battery hold-down bracket was left completely unsecured. The retaining bolts were absent, (later found loose in the cargo tray area). The battery terminal cover was also improperly secured. I returned to the dealership within twenty minutes of collecting my vehicle and described the condition directly to Service Manager Robin Farr, who assured me it would be corrected. It was not. On April 6, 2026, Withnell Hyundai in Salem, OR (RO# XXX/X) identified the bracket as completely unsecured with me present, documenting: "found the 12V bracket loose on arrival" and "found that battery hold down was not secured with customer present...bolts were located in cargo tray area." I had driven approximately 50 miles with this condition unknown to me. On a 2019 Hyundai Ioniq PHEV, the 12V battery is located in the boot adjacent to high-voltage traction battery components and wiring. A loose metal bracket free to move during driving presents a genuine risk of electrical arc and fire in an enclosed space: potentially while the vehicle is in motion. Dick's acknowledged the failure in writing and refunded the charges associated with this work. The condition has been corrected by Withnell Hyundai. I am filing this report to create a federal record of a safety-critical installation failure at a certified Hyundai dealership. I contacted Hyundai Motor America (Case #XXX) regarding this matter. Their representative was unable to describe any oversight mechanism ensuring safe repairs at certified Hyundai dealerships. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving the transmission started driving rough and the car was stuck in ev mode. Wouldnt even go back to hybrid mode. I kept driving until all my battery range was exhausted and lost acceleration and had to pull over the side of the highway. It was late at night so there was no one around or behind me, otherwise I would have been hit. Once stopped the car would not move at all so I called a tow to get me off the highway. I was away from home and had to tow it 120 miles back to the local dealer. The engine clutch actuator failed and ruined my transmission and left me stranded in the middle of the night!

Many times, when I back out of my driveway into the intersection in front of my house the vehicle hesitates for several seconds when shifted from Reverse to Drive. I am in a situation where I cannot accelerate if needed out of the intersection. This is a safety issue in my opinion. The dealer was not able to replicate the problem, even though it happens frequently and has not provided a solution. One time, on a long road trip, while climbing a grade the vehicle could not achieve normal highway speeds (could only get to 20-30 mph). Big rigs were right behind the vehicle and were not happy having to slow down. Again creating a big safety hazard.