2023 Hyundai Ioniq 5 Reliability Score & Common Problems

Owners of the 2023 Hyundai Ioniq 5 frequently report issues related to the vehicle speed control, with several complaints highlighting unintended acceleration and deceleration. Symptoms include sudden and rapid acceleration when parking, as described in two crash incidents, and unexpected speed fluctuations on the highway where the car loses power and then jerks forward. These issues often occur after approximately 50 miles of highway driving or during specific maneuvers like parking. Safety implications are significant, with reports of crashes and loss of control, particularly when unintended acceleration occurs in parking situations. Potential buyers should be aware of these patterns, especially concerning the Auto Hold function, regenerative braking, and driver-assistance systems that may contribute to these experiences.

Owners report that the 2023 Hyundai Ioniq-5 frequently experiences issues with brake lights not activating during regenerative braking, particularly in I-Pedal and Level 3 modes. Complaints commonly describe scenarios where deceleration occurs without brake lights illuminating, potentially leading to near-collisions as other drivers are unaware the vehicle is slowing down. Two complaints involve crashes where the I-Pedal mode did not stop the car as expected, and the brake pedal failed to engage effectively, resulting in a collision with an electrical pole. The incidents highlight safety implications, especially when regenerative braking is used without clear indication to following drivers. These reports primarily emerge from vehicles equipped with the I-Pedal feature, which was installed via a software update in August 2023.

Owners report several issues with the 2023 Hyundai Ioniq 5's forward collision avoidance and cruise control systems. Commonly noted problems include the cruise control not disengaging properly when the brake is applied, leading to unintended acceleration, and the system misreading speed limits, resulting in incorrect speed settings. Multiple owners describe sensor errors and misalignment, causing the cruise control to malfunction or become unusable. Complaints frequently mention failures of the automatic emergency braking system to activate in potential collision scenarios. These issues are reported at various mileages, with some occurring as early as 15,000 miles. Safety implications include sudden deceleration in traffic, unintended acceleration, and potential collision risks, which may concern prospective buyers.

Owners report that the 2023 Hyundai Ioniq-5 experiences issues related to the Integrated Charging Control Unit (ICCU), with multiple complaints highlighting the vehicle suddenly entering "limp mode," limiting speed to 25 mph. This issue often follows a warning to check the power system and is sometimes associated with a discharged 12-volt battery. Several owners describe ICCU failures occurring even after recall repairs, with some vehicles remaining unrepaired for extended periods due to part unavailability. Additionally, there are reports of the charging port overheating, leading to thermal throttling, and these problems persist despite software updates. Safety implications include limited vehicle speed, which owners find unsafe, particularly when the vehicle becomes unusable during operation.

Owners of the 2023 Hyundai Ioniq-5 frequently report issues with the sound-deadening foam inside the tires, specifically Michelin 235/55/R19 models. Complaints commonly describe the foam detaching and clumping inside the tire, leading to severe vibrations and steering wheel shaking, particularly at speeds over 45 mph. These issues typically emerge between 6,400 and 16,000 miles. Multiple owners note the inability to drive safely at highway speeds due to the imbalance, which poses a potential safety risk. Despite numerous service visits, owners often find solutions only through tire replacement or foam removal, as there appears to be limited guidance from manufacturers or dealerships.

Owners report that the 2023 Hyundai Ioniq 5 exhibits issues with brake light activation during regenerative braking, particularly in one pedal driving or "iPedal" mode. Complaints frequently mention that the brake lights do not illuminate unless the accelerator pedal is fully released, even when the vehicle is decelerating rapidly. This behavior is common across various regenerative braking levels and can lead to situations where following drivers are not alerted to the vehicle's slowing, posing a potential safety risk. Multiple owners describe altering their driving habits due to this issue, although no specific mileage range is associated with the complaints. This information may be important for potential buyers to consider, especially if they plan to utilize the vehicle's regenerative braking features extensively.

Owners of the 2023 Hyundai Ioniq-5 report issues primarily related to steering and control, with symptoms including uncontrollable shaking and vibrations at speeds over 40 mph, and steering wheel vibrations increasing with speed, particularly above 55 mph. These issues are noted at varying mileages, with one report at 10,800 miles. Complaints also describe electrical system warnings and auxiliary battery charging problems, which can result in the vehicle being undrivable and requiring towing. Safety implications include potential loss of control due to severe shaking and vibrations, as well as the risk of power and control loss at highway speeds. Used car buyers should be aware of these reported issues, especially considering the potential for unexpected downtime and repair delays.