Owners have reported 1 crash and 1 injury to NHTSA for the 2025 Hyundai Ioniq 5. These are unverified owner reports, not confirmed defect rates.
Owner complaints84
ELECTRICAL SYSTEM
Owners report frequent failures of the Integrated Charging Control Unit (ICCU) in the 2025 Hyundai Ioniq-5, often rendering the vehicle inoperable. Typical symptoms include a popping sound, warning lights indicating electrical system issues, and the vehicle entering a reduced power mode or shutting down completely. These failures are commonly noted at mileages ranging from as low as 200 to around 9,400 miles. Safety implications are evident as several owners describe losing power while driving, which could pose risks if occurring in traffic or at high speeds. Buyers should be aware that replacement parts for the ICCU are often on backorder, leading to extended repair times.
Owner complaints33
POWER TRAIN
Owners of the 2025 Hyundai Ioniq 5 frequently report issues with the Integrated Charging Control Unit (ICCU), often accompanied by a loud pop sound, followed by a loss of power or the vehicle entering "limp mode." Symptoms typically include warning lights on the dashboard, error messages about the electrical system, and the vehicle's inability to exceed low speeds, usually around 25 mph. These failures are often reported within the first few thousand miles, with some vehicles having as few as 2,949 miles. Safety implications are significant, as these issues can occur suddenly while driving, leading to potential hazards like being stranded on highways or in unsafe areas. Buyers should be aware of the potential for ICCU failures and the associated risk of sudden power loss.
Owner complaints9
UNKNOWN OR OTHER
Owners report several issues with the 2025 Hyundai Ioniq-5, with a notable pattern involving the Integrated Charging Control Unit (ICCU) failure, leading to loss of propulsion while driving, which poses significant safety risks, especially in traffic. Multiple complaints also highlight persistent problems with the Forward Attention Warning (FAW) system, which triggers frequent and distracting alerts that cannot be fully disabled, despite attempts to adjust settings. Additionally, one report mentions a vehicle being undrivable due to a national backorder on a crucial part needed for sensor calibration after a minor collision, causing prolonged downtime. These issues often occur shortly after purchase or during early usage, as indicated by the recent nature of the complaints.
Severity signals: 1 crash, 0 fire, 0 injury reports
Owner complaints9
FORWARD COLLISION AVOIDANCE
Owners of the 2025 Hyundai Ioniq-5 frequently report issues with the Forward Attention Warning (FAW) system, particularly when using adaptive cruise control and lane-keeping assist. Common symptoms include persistent false alarms indicating the driver is not paying attention, even when they are looking directly at the road. These false alerts often occur regardless of eyewear, though some owners note increased frequency when wearing glasses or sunglasses. Complaints suggest these issues arise shortly after purchase, with no specific mileage range mentioned. The false alarms can distract drivers, and some owners describe situations where driving assistance features are abruptly disabled, potentially leading to unsafe conditions such as sudden deceleration or unintended lane departure. This information is crucial for potential buyers to consider, especially those interested in the vehicle's driver assistance capabilities.
Owner complaints5
FUEL/PROPULSION SYSTEM
Owners report issues with the 2025 Hyundai Ioniq 5's fuel/propulsion system, particularly involving ICCU failures and high-voltage traction battery problems. Symptoms frequently include sudden loss of acceleration, unresponsive acceleration pedals, and unexpected limp mode activation while driving, often accompanied by dashboard warnings. These issues appear at varying mileages, with one traction battery failure occurring around 1,250 miles. Safety implications are noted, such as concerns over vehicle control during acceleration and braking, and one instance where a vehicle became undriveable and unable to be secured due to a dead 12V battery. Potential buyers should be aware of these recurring problems and the associated safety risks.
Owner complaints5
VEHICLE SPEED CONTROL
Owners of the 2025 Hyundai Ioniq-5 report issues with the vehicle's speed control, particularly with the i-Pedal mode and N e-Shift mode. In i-Pedal mode, multiple reports indicate that the vehicle fails to decelerate immediately when the accelerator is released, maintaining speed for several seconds before slowing down, which can increase the risk of rear-end collisions. With the N e-Shift mode, owners describe unintended acceleration for 1-2 seconds after releasing the throttle, especially during spirited driving, which could potentially lead to unsafe situations. These issues are noted shortly after acquiring the vehicle, with no warning lamps or messages accompanying the symptoms. Safety implications include reduced reaction time and increased cognitive load, which may lead to accidents if not addressed.
Owner complaints4
ENGINE
Owners of the 2025 Hyundai Ioniq-5 report several engine-related issues, with the most common being sudden power failures while driving at highway speeds, as described by multiple owners who experience a complete loss of power without warning lights. Another issue frequently mentioned is a surging or pulsing sensation at speeds of 60-65 mph, where the vehicle struggles to maintain a consistent speed. Additionally, there are reports of a loud screeching noise, potentially linked to a missing wave washer in the MGDU housing, although this seems to affect vehicles built within a specific timeframe. These problems often arise within the first few weeks of ownership, with some vehicles having as little as 500 miles on the odometer. Safety concerns are evident, particularly with the power failure incidents, as they occur unexpectedly on highways, posing a risk of accidents.
Owner complaints4
LANE DEPARTURE
Owners report issues with the 2025 Hyundai Ioniq-5's Lane Keeping Assist (LKA) system, primarily when wearing prescription or dark sunglasses. Complaints frequently mention false warnings and alarms due to the vehicle's inability to detect the driver's eyes through sunglasses, which affects the functionality of the LKA system. This problem persists even when settings are adjusted to disable the warnings. Multiple owners describe the system as nearly unusable under these conditions, suggesting a design flaw that impacts the effectiveness of the safety feature. No specific mileage or timeline patterns are noted, but the issue is consistent across reports, with implications for driver safety due to distraction and potential loss of a key safety feature.
Owner complaints2
SERVICE BRAKES
Owners of the 2025 Hyundai Ioniq 5 report issues with the vehicle's service brakes, specifically related to the Forward Attention Warning system and unintended acceleration. Complaints frequently mention that the Forward Attention Warning system gives false positives, resulting in distracting alerts and, in some cases, hard braking on the highway when the system fails to detect driver attention properly. Another issue noted by owners involves unintended acceleration when releasing the accelerator pedal, which persists for approximately three seconds before normal braking resumes. This problem is associated with a failure in the ABS module, with one report indicating this occurred at around 9,200 miles. These issues have significant safety implications, including the potential for loss of control, particularly at highway speeds.
