Kia EV6 Long Range RWD

The ICCU converts high-voltage DC to 12V to keep auxiliary systems running. When the internal MOSFET degrades from cumulative thermal and voltage stress, it eventually short-circuits and blows an internal fuse, stopping all 12V charging. The car then gradually loses systems and eventually shuts down. Kia issued recall SC327 covering 2022-2024 models. Consumer Reports data suggests 2-10% of E-GMP owners experienced ICCU-related issues, though Kia's official estimate is around 1%. The recall software update slows the degradation curve but does not eliminate the underlying hardware vulnerability — repeat failures have been reported. Out of warranty, ICCU replacement costs approximately €1,500-3,000 including labor. Verify recall completion with Kia using the VIN before purchase.

Many EV6 owners report finding the car completely dead due to a drained 12V battery. The root cause is often the ICCU (see above), but the 12V system also has design quirks: the Aux Battery Saver+ feature stops recharging after 10 consecutive automatic top-ups, assuming the battery is faulty. Third-party apps (Kia Connect, smart charging integrations), the interior V2L 120V outlet activating by itself, and key fob proximity have also been identified as drain sources. The 12V battery itself costs €100-200 to replace. Some owners have switched to lithium-ion 12V replacements (around €350) which are more resistant to deep discharge cycles.

The EV6's approximately 477 kg battery pack places significant loads on the suspension, causing premature wear on wishbones, bushings, and ball joints. Owners report clunking noises over speed bumps and in turns, typically appearing between 30,000-60,000 km. Kia has identified distorted front wishbones as a recurring fault, with some cars receiving warranty replacements. A pair of front wishbones including bushings costs €400-600 at an independent shop, or €800-1,200 at a Kia dealer. Cars driven on poor road surfaces or with 20-inch wheels (GT-Line spec) are more susceptible. The 19-inch wheels standard on most RWD models offer slightly better protection.

The 12.3-inch infotainment screen can freeze, display a black screen, or take 3-5 minutes to boot. In most cases, the screen eventually resets itself or can be manually reset using the pinhole button under the left climate knob. Software updates have improved stability, but the issue persists for some owners. A complete infotainment head unit replacement costs approximately €600-800 if the hardware fails. Most occurrences are software-related and resolved through OTA updates or dealer software flashing at no cost.

The electrically operated charging port door can malfunction due to latch misalignment, a tight release mechanism, or the system incorrectly detecting ongoing charging. Symptoms include the door not opening when pressed, refusing to close after unplugging, or not releasing the charging cable. Dealers have noted the release mechanism is sometimes too tight from the factory. The latch mechanism replacement costs €150-300 plus labor. This is a nuisance issue rather than a safety concern but can prevent charging until repaired.

Some owners notice the driver seat rocks or shifts laterally, particularly during aggressive maneuvers. The root cause is typically a cracked seat assembly frame, which can also affect the electric seat adjustment motors. A TSB exists for replacing the seat frame, primarily affecting early 2023 production vehicles. Dealers have replaced complete seat assemblies under warranty in confirmed cases. Outside warranty, a seat frame replacement costs €500-800. While the EV9 had a formal seat bolt recall, the EV6 has been addressed through individual warranty claims and the TSB.