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Hyundai Ioniq 5 Engine Problems

360 owner complaints filed with NHTSA across 4 model years.

Complaints by Year

Worst year: 2022. Best year: 2024.

Owner Reports

A representative sample of complaints filed with NHTSA.

Engine · 2023 4

We are reporting a suspected thermal runaway incident involving our recently purchased used 2023 Hyundai Ioniq 5 and have significant concerns regarding the vehicle's safety. **Vehicle Information** * Purchased XXX, 36,662 miles * Clean...

Engine · 2022 4

Component that failed: High-voltage main battery pack assembly and associated electrical architecture. The vehicle and the component are currently located at my home and are available for inspection upon request. Description of Incident...

Engine · 2023 4

OnXXX, as we approached what I call the 6 o’clock position of a round-about in [XXX], we had braked almost to a full stop (0-5 mph) to wait on the car ahead of us to enter the round-about when we felt increasing movement. Despite brak...

Engine · 2025 4

On April 20th while parking the vehicle suddenly had a power surge crossing over multiple curbs and across a parking lot and landscaped areas and hitting a tree. The vehicle refused to brake and the driver airbag never deployed.

Engine · 2023 4

7 incidents of electrical drive problem incidents 1-3car would not start despite full battery Incident 4 same thing and car went to dealer, they said know problem and they would fix it overnight by downloading new software and charge abo...

Engine · 2024 4

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,...

Engine · 2023 4

Charging port burned during DC fast charging session, resulting in melted charging pin. Unable to insert CCS connecter due to melted pin obstructing insertion. Further damage to electrical systems unknown. No warning signs shown aside fr...

Engine · 2022 2

The Integrated Charging Control Unit (ICCU) has failed repeatedly on this vehicle. It has been replaced three times by Haselwood Hyundai dealer since the vehicle was purchased new in 2021. Dates: 9/8/2023, 12/19/2024, 9/30/2025 at approx...

Engine · 2025 2

On 8/30 my vehicle experienced a power loss on a highway (reported here separately). I took the car to the dealership and they could not replicate the error and gave the vehicle back to me on 9/4. Later that day I had to drive 2 hours no...

Engine · 2025 2

While driving this EV with cruise control on, the dashboard suddenly showed a message that “Smart Cruise Control conditions not met”. Attempting to re-engage the cruise control did not work and then the vehicle suddenly lost all pro...

Engine · 2025 2

I heard a loud popped sound from the back of my car while driving home. The car lost power and eventually died on the street. The war displacy came on to tell em to check electrical system. I originally bought th car from Capitol Huynd...

Engine · 2022 2

Active powertrain failure on my 2022 Ioniq 5 SE, which poses an immediate and severe safety risk. On May 18, 2026, the vehicle suffered a catastrophic loss of power and a complete failure to charge. At Murdock Hyundai of Lindon, technic...

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