2025 Kia Ev6

Like its sibling the Hyundai Ioniq 5, the 2023 EV6 built on the shared E-GMP platform suffers from chronic 12V auxiliary battery drain. The DC-DC converter fails to properly maintain the 12V battery charge during extended parking, and multiple vehicle modules continue drawing power after shutdown. Owners report finding the vehicle completely dead after just a few days of sitting.

Kia released multiple OTA software updates to optimize DC-DC converter charging logic and reduce parasitic draw. Update to the latest software via Settings > General > Software Update. If the 12V battery has been deeply discharged multiple times, it may need replacement with the correct AGM specification. Some owners install a battery disconnect switch for extended storage.

The EV6 experiences frequent DC fast charging session failures at CCS stations, with the vehicle failing to initiate charging, authenticating but not starting power flow, or terminating the session prematurely mid-charge. The issue is most prevalent at older CCS stations and in cold weather when the battery preconditioning system does not adequately warm the pack before arrival.

Use the built-in navigation to route to the charger, which triggers battery preconditioning for optimal charging speed and compatibility. Kia has released OTA updates improving the CCS charging handshake protocol and cold-weather preconditioning activation. If failures persist, have the dealer inspect the CCS charge port pins and on-board charger module.

The dual-screen infotainment system freezes, reboots spontaneously, and exhibits significant lag during normal operation. The navigation system may lose GPS position, the climate control touchscreen becomes unresponsive, and wireless Apple CarPlay/Android Auto connections drop frequently. The rearview camera display may also go black when shifting into reverse.

Kia has released multiple OTA and dealer-applied software updates to improve infotainment stability. Ensure the vehicle has the latest firmware version. A temporary fix for a frozen screen is to press and hold the power button for 10 seconds to force a reboot. In persistent cases, the head unit hardware may need replacement under warranty.

Some EV6 AWD models develop a pronounced humming or grinding noise from the front electric motor during acceleration and regenerative braking. The noise is caused by premature bearing wear in the front motor assembly and is distinguishable from normal EV motor whine by its higher frequency and metallic quality.

Have the dealer road test the vehicle and inspect the front motor assembly for bearing noise. If bearing wear is confirmed, the front motor or its bearing assembly will need replacement. The repair is covered under the EV powertrain warranty (10 years/100,000 miles).

The regenerative braking system can behave inconsistently, with the deceleration force varying between stops even at the same i-PEDAL or regen setting. Some owners report a momentary lurch when transitioning from regenerative to friction braking at low speeds, and the one-pedal driving mode may not bring the vehicle to a complete stop consistently on slight inclines.

Kia released software updates to improve regenerative braking calibration and the blending between regenerative and friction braking. Have the dealer update the Vehicle Control Unit (VCU) and Motor Control Unit (MCU) software to the latest version. The brake pads should also be inspected, as limited use from regenerative braking can cause glazing.