2022 Hyundai Ioniq 5

The 2023 Ioniq 5 is plagued by a widespread 12V auxiliary battery drain issue that can leave the vehicle completely inoperable. The E-GMP platform's DC-DC converter fails to properly maintain the 12V battery charge while the vehicle is parked, and numerous vehicle modules continue drawing power after shutdown. This issue affects both the Ioniq 5 and its sibling, the Kia EV6.

Hyundai released multiple OTA software updates to optimize the DC-DC converter charging logic and reduce parasitic draw from vehicle modules. Ensure the vehicle is on the latest software version via Settings > General > Software Update. In persistent cases, the 12V battery may need replacement with an AGM battery of the correct specification. Some owners use a trickle charger for extended parking.

Owners report frequent DC fast charging failures at CCS stations, with the vehicle refusing to initiate a charging session or terminating the session prematurely. Charging speeds may also be significantly lower than advertised, particularly in cold weather when the battery preconditioning system does not activate properly before arriving at the charger.

Hyundai released OTA software updates to improve CCS charging compatibility and battery preconditioning activation. Enable the 'Winter Mode' or route to a charger using the built-in navigation to trigger battery preconditioning. If charging failures persist, have the dealer inspect the CCS charge port pins for damage and test the on-board charger module.

The dual-screen infotainment system frequently freezes, goes black, or spontaneously reboots while driving. Apple CarPlay and Android Auto connections drop intermittently, navigation data disappears mid-route, and the climate control touchscreen becomes unresponsive. Multiple NHTSA complaints document the issue as a safety concern since it disables the rearview camera and vehicle settings.

Hyundai has released multiple OTA and dealer-applied software updates to improve infotainment stability. Ensure the vehicle is running the latest infotainment firmware. A temporary fix is to hold the power button and the tuning knob simultaneously for 10 seconds to force a reboot. In persistent cases, the head unit may need hardware replacement.

Some 2023 Ioniq 5 owners report an excessively loud whining noise from the electric drive motor and reduction gear assembly during acceleration and regenerative braking. While some motor whine is inherent to EVs, affected vehicles produce a noticeably louder and more intrusive pitch that worsens over time, suggesting bearing or gear wear.

Have the dealer perform a road test to evaluate the noise level against Hyundai's specification. If the noise exceeds the acceptable threshold, the electric motor or reduction gear assembly may need replacement under the EV powertrain warranty (10 years/100,000 miles). Reference TSB EV-001 for noise evaluation procedure.

The Vehicle-to-Load (V2L) feature, which allows the Ioniq 5 to function as a mobile power source, may fail to supply power or provide inconsistent output. The exterior V2L adapter can overheat and shut down, and the interior 120V outlet under the rear seats may trip its internal breaker repeatedly even with loads well below the rated 1.9kW capacity.

Ensure the V2L adapter firmware is current by having the dealer check for updates. Replace the V2L adapter if it consistently overheats — updated versions with improved thermal management are available. For the interior outlet, have the dealer inspect the wiring harness and relay connections.