Engine complaints by model year
Mileage when the problem started
What owners report
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.
The ICCU (Integrated Charge Control Unit) failed. Fortunately I was in a parking lot at the time, as the vehicle limited its top speed to around 25 mph. Had the failure occurred on a highway it could have caused a collision. While this is a 2025 model year Ioniq 5, the ICCU hardware (part 36400-1XAA0) remains unchanged across all Hyundai/Kia/Gensis vehicles sharing the eGMP platform. NHTSA previously issued recall 24V-868 intended to address such ICCU failures. While the modified software is included from the factory in the 2025 model year Ioniq 5, it appears that the 24V-868 recall is not a complete fix. Indeed, ICCU failure continues to be one of the most commonly reported owner issues, both for vehicles which have already had the "fix" from recall 24V-868 and for newer vehicles outside of the recall's scope. …
The contact owns a 2024 Hyundai Ioniq 5. The contact stated that while his wife was driving approximately 30 MPH, the vehicle started losing motive power. The contact's wife depressed the accelerator pedal; however, the vehicle shifted to first or second gear and failed to accelerate above 20 MPH. The contact stated there were no warnings illuminated. The contact stated that his wife pulled into a parking lot and the vehicle lost electrical power and was unable to be restarted. The contact had the vehicle towed to a dealer. The dealer diagnosed the vehicle and informed the contact that the vehicle had had a failure of a part that was on a national back order. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 11,000.
The contact owns a 2024 Hyundai Ioniq 5. The contact stated that while driving approximately 60 MPH, the vehicle lost automotive power, with a burning odor entering the cabin of the vehicle. The message "Check Electric Vehicle System" was temporarily displayed on the digital display screen. The vehicle was towed to a local dealer and remained with the dealer. An appointment was scheduled to inspect the vehicle. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 17,000.
What component or system failed or malfunctioned: Rear electric motor. Specifically the "engine oil pump" that is used to cool the rear motor. The pump does not respond to MCU commands and does not cool the motor. This causes the motor to overheat after about an hour of highway driving causing the motor to provide VERY limited power. How was your safety or the safety of others put at risk: When the above happens the car experiences a delayed throttle, and very little power to accelerate. This occurs while traveling on a highway where you may need to pass, but no longer have the power to do so safely. Has the problem been reproduced or confirmed by a dealer or independent service center: Dealer took the car in and did not properly attempt to reproduce the issue. Then stated that if the car does not produce a DTC then there is no issue. …
EV goes into power limited mode when on interstate when going ~50 miles while driving 70mph or more. Happened each of my 3 times on interstate of about that distance. First time was Sat 4/29 while in eco mode with 70% battery and 82 F outside, 1 hr drive 50+ miles. Second time was in normal mode Friday 5/12, 55% battery 72 F outside 1 hr drive 50+ miles. Third time was in normal mode and it happened after 42 miles. I scheduled a service after the first incident but they were only able to take it on 5/31. When this happens you lose ability to accelerate and have to coast to the side of road and let it sit for 10+ minutes to clear and then can resume, I would take surface roads after it occurred. Impacts safety for self and others, as it drastically slows without brake lights causing a high chance of being rear ended. The last incident was close to it. …
The contact owns a 2022 Hyundai Ioniq 5. The contact stated that the electrical charger was overheating, and the 12-volt battery was draining without warning. The contact stated that while charging the vehicle, the contact heard an explosion. The contact stated while driving 20 MPH, the message "Stop Driving Immediately - Return to Dealer"; the check engine warning light illuminated, and the vehicle experienced a loss of automotive power. The contact stated that on one occasion after turning off the vehicle, the battery remained active for 3 days, causing the battery to become drained. The vehicle was taken to a local dealer where the vehicle was diagnosed and the contact was informed that the water pump, the EV battery, the charge point, the inside batteries, the sensors, the navigation system, were faulty and needed to be replaced. …
On February 6, 2023 at approximately 9:50 a.m. I was driving my Hyundai Ioniq 5 SEL northbound on CA Highway 135, Santa Maria, when I heard a loud pop coming from my car. Within a few seconds my car lost speed rapidly, from 55 mph to 25 then a second later 22 mph . I tried to accelerate - there was no response - the car maintained the 22 mph. A message appeared on the right side of the dash board in an orange circle "check vehicle system" with a small upside down triangle with letters EV also inside this circle and a "small orange battery" picture showed on the left. I drove the car onto the shoulder of the road and with my hazard lights blinking, drove a half block making a right hand turn onto Miller Street to get off the Highway. I entered CHC Medical Building's parking lot. …
Frequently asked questions
Which Hyundai Ioniq 5 years have engine problems?
By NHTSA complaints, the 2023 (38), 2022 (36), 2024 (22) and 2025 (20) model years. Engine complaints make up 10% of all complaints for the 2023.
Is there a recall for Hyundai Ioniq 5 engine problems?
No. NHTSA lists no engine & cooling recall for any Hyundai Ioniq 5 model year. A widespread problem may still be covered by an extended warranty or a manufacturer service bulletin, so ask a dealer.
At what mileage do Hyundai Ioniq 5 engine problems start?
Across all years, half of the complaints with a recorded mileage happened before about 33,000 miles; 67% happened before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.