2023 Hyundai Ioniq 6 Problems: 15 Known Issues

On the 2023-2025 Hyundai Ioniq 6, nHTSA recall 24V-868 covers 28,932 model-year 2023-2025 Ioniq 6 vehicles. Electrical load conditions can cause a MOSFET inside the Integrated Charging Control Unit (ICCU) to fail and open the ICCU fuse, preventing the ICCU from charging the 12-volt battery. The vehicle then enters a fail-safe mode that gradually reduces motive power; if the 12-volt battery is fully depleted, all motive power can be lost.

On the 2023-2025 Hyundai Ioniq 6, like the Ioniq 5, the Ioniq 6 shares the E-GMP platform's 12V auxiliary battery drain issue. Always-on telematics, Bluelink, and various modules draw down the 12V battery when the vehicle sits for extended periods. The issue is worse in cold weather when battery capacity is reduced.

On the 2023-2025 Hyundai Ioniq 6, the IONIQ 6 uses a two-horn setup, a high-tone and a low-tone unit. Owners across model years report the low-tone horn failing, leaving a thin, quiet note that is hard to hear from another vehicle; a smaller number report both horns dead. NHTSA complaints on the 2023 and 2024 car place the failure anywhere from under 3,000 miles to about 16,000 miles, and note that owners typically only discover it when they actually need the horn — which is the safety concern. Multiple forum reports describe dealers confirming the fault and replacing one or both horns.

On the 2023-2025 Hyundai Ioniq 6, ioniq 6 owners report the central infotainment screen going completely black (sometimes while audio keeps playing), and the reverse camera failing to display when shifted into reverse. The fault frequently appears after over-the-air navigation/software updates, in some cases leaving the head unit unresponsive until a forced reset. Losing the backup camera view is a safety concern when reversing.

On the 2023-2024 Hyundai Ioniq 6, separate from the ICCU story, 2023-2024 IONIQ 6 owners report Level 2 (240V AC) sessions that stop partway through or fall off to a fraction of the expected rate. Hyundai's Vehicle Charging Management System (VCMS) reduces or halts AC current when it detects high temperature or instability at the charge inlet, to protect the connector from thermal damage. NHTSA complaints on the 2023 car describe the inlet temperature climbing to roughly 240F with the charge rate dropping from 40 A to 23 A mid-session. The original software would leave the session derated or dead rather than recovering.

On the 2023-2025 Hyundai Ioniq 6, nHTSA recall 26V-218 covers 35,149 model-year 2023-2025 Ioniq 6 vehicles. A front seat-belt snap-on lower anchor can be damaged if removed or installed improperly during maintenance or repair, leaving the belt insufficiently attached to the seat frame. An insufficiently attached anchor can increase occupant-injury risk in a crash.

On the 2023-2025 Hyundai Ioniq 6, iONIQ 6 owners report the Forward Collision-Avoidance Assist (FCA) firing a collision warning and then applying hard automatic braking with no vehicle or obstacle ahead. An NHTSA complaint on the IONIQ 6 describes highway travel at roughly 75 mph where the system alerted and braked within about one second, dropping the car to around 25 mph in traffic. Forum reports describe the same on gentle bends with parked cars alongside, on steep driveway transitions, and in ordinary moderate traffic. The trigger is the front radar behind the grille badge and the windshield camera; contamination, film, or a misaligned radar after minor front-end work makes it markedly worse.

On the 2023-2025 Hyundai Ioniq 6, the Ioniq 6's sloped rear design causes the rearview camera and parking sensors to be easily obstructed by water, snow, mud, and road spray. The camera sits in a recessed area that collects debris, and the aerodynamic shape channels road spray directly onto the sensors. This reduces safety system reliability in adverse weather.

On the 2023-2025 Hyundai Ioniq 6, nHTSA recall 25V-606 covers 31,042 model-year 2023-2025 Ioniq 6 vehicles. The charging-port-door outer panel may not be sufficiently engaged with its retaining hooks and can detach during vehicle operation. A detached panel can become a road hazard and increase crash risk.

On the 2023-2025 Hyundai Ioniq 6, owners report hairline windshield cracks that originate near the bottom edge by the wipers and travel upward with no rock chip or impact, often in cold weather when cabin/defroster heat is used on a parked car. Replacement is expensive because the laminated glass requires forward-camera/ADAS recalibration, and the glass is not covered by the factory warranty. Note: similar reports are common across the shared E-GMP platform (Ioniq 5/6), so attribution is partly cross-model.

On the 2023 Hyundai Ioniq 6, a supplier heat-treatment error left the rear inner driveshaft (halfshaft) on a batch of early-build 2023 IONIQ 6 sedans below spec strength, allowing the shaft to break under load — most likely under hard acceleration or high torque from a stop. When it breaks, drive is lost to that wheel and the car can coast to a stop in traffic. Hyundai's recall report covers 1,165 E-GMP vehicles, of which 913 are IONIQ 6 — the IONIQ 6 is the single largest share of this campaign, not a carry-over from the IONIQ 5. Hyundai internal campaign number 253.

On the 2023-2025 Hyundai Ioniq 6, despite the Ioniq 6's aerodynamic design for low wind noise, many owners report excessive road and tire noise, especially on rough or coarse pavement. The heavy battery pack transmits road vibrations through the floor, and the wheel well insulation is insufficient. The EV's silent drivetrain makes road noise the dominant cabin sound.

On the 2023-2025 Hyundai Ioniq 6, the Ioniq 6's streamlined design creates noticeable wind noise intrusion, particularly around the frameless door windows and side mirrors at highway speeds. The door seal design does not fully prevent wind noise, and the low-drag side mirrors create turbulence at the A-pillar. The EV's silent drivetrain makes wind noise more noticeable.

On the 2023-2026 Hyundai Ioniq 6, two separate cold-weather behaviors compound on the IONIQ 6. First, cabin heating: the heat pump is not standard across the range — Standard Range / base SE cars use resistive heating, so winter consumption climbs sharply and owners report 20-50% range loss in deep cold. Second, pack temperature: the 800V pack will not accept high DC current until it is warm. Owners report DC fast-charge sessions capped around 30-50 kW at near-freezing ambient, against a ~230-240 kW peak when warm — turning an 18-minute 10-80% stop into an hour. Battery preconditioning exists but is not automatic; it must be enabled in settings and triggered by routing to a DC fast charger in the navigation system, roughly 30 minutes out.

On the 2023-2025 Hyundai Ioniq 6, iONIQ 6 cars on the 20-inch wheel package wear their factory Pirelli P Zero (Elect) tires far faster than the tread warranty implies. Owners report 7/32 remaining at about 15,000 miles, 5/32 at roughly 21,000 miles, and full replacement needed around 25,000-30,000 miles — on the order of 40-50% short of the rated mileage. The drivers are the usual EV set: high curb weight, instant torque, a soft low-rolling-resistance/noise-cancelling compound, and aggressive rear camber on AWD cars. Owners who moved to 18-inch wheels with a touring all-season report substantially slower wear, at some cost in the car's headline efficiency figure.