2024 Kia EV6 Problems

What owners report

Owners of the 2024 Kia EV6 most often describe a sudden loss of drive power, usually after a warning such as 'check electric vehicle system' or 'stop vehicle and check power supply'. Many of these reports link the event to the integrated charging control unit (ICCU) and to 12-volt battery problems, and some owners say the symptoms came back after a software update or part replacement. Less frequent reports describe unexpected speeding up, brakes that seemed slow to respond, and automatic braking that did not engage or braked without warning.

1. 1
   Electrical system

   Sudden power loss (ICCU charging control unit)

   • 55 complaints (71%)
   • typically at 2.4 yrs old
   • 3 mention a crash, fire or injury
   • filed 2024–2026

   Owners describe a warning such as 'check electric vehicle system' or 'stop vehicle and check power supply', followed by reduced power, a limp or turtle mode, or a sudden loss of drive power. Several say it happened while driving on roads or highways, and some report losing steering or acceleration in traffic or stopping in the roadway. A few describe a pop or bang shortly before the warning appeared. According to complaints, the dealer confirmed an ICCU failure and replaced the unit, often under warranty, and some vehicles had to be towed. The sample rarely records mileage; where owners mention it, these failures appear between 616 miles and about 14,000 miles.

   Recall 24V867000Recall 24V2000002 related service bulletins

   What to check: Ask whether the ICCU recall or warranty extension work (for example SC327 or WTY044) was completed and whether the ICCU and its fuse were checked. During a test drive, watch for charging-system or power-supply warnings, and ask the dealer for any stored diagnostic codes.

   2 excerpts from owner complaints in NHTSA records

   “We purchased a certified pre-owned 2024 Kia EV6 GT on 6/5/2026. On 6/6/2026 while driving on city streets, the display screen suddenly displayed a large and flashing red warning message Stop vehicle and check power supply in addition to the battery symbol. We took the vehicle to the dealership and they diagnosed that the ICCU had failed and needed to be replaced.”

   NHTSA complaint #11749585, filed 2026-07

   “I had an ICCU failure on 4/12/26. I was fortunate enough to be close to home, so I was able to get back home before the vehicle dropped into reduced power mode. As has been reported many other places, I heard a loud pop and moments later a number or warning messages came up on the display. It was towed to the dealer the following day and has been confirmed to be an ICCU failure.”

   NHTSA complaint #11735651, filed 2026-05
2. 2
   Electrical system

   12-volt battery drain, no-start, jump-starts

   • 48 complaints (62%)
   • typically at 2.4 yrs old
   • 2 mention a crash, fire or injury
   • filed 2024–2026

   Owners describe a 12-volt battery that drains or fails, sometimes without warning, leaving the car unable to start or needing a jump-start. Some say the car would not power on even with a high charge on the drive battery, and that repeated jump-starts or tows were needed. The dealer sometimes replaced the 12-volt battery, but some owners say no diagnosis of the charging unit was given. The sample rarely records mileage; where mileage is stated for a 12-volt failure, it is just over 23,000 miles.

   Recall 24V200000Recall 24V867000

   What to check: Ask whether the 12-volt battery has been replaced and whether any charging-system software update was installed. Ask for the no-start and jump-start history, and check whether battery or charging warnings appear after the car has sat for a while.

   2 excerpts from owner complaints in NHTSA records

   “Was trying to drive EV. As soon as I pulled out of driveway it gave me a warning sign; to check electrical system/stop vehicle and check power supply. I couldn't drive car anywhere, had to get it towed to dealership. When tow truck arrived we couldn't turn car on, it had no power. Mind you, I had full charge on EV.”

   NHTSA complaint #11725103, filed 2026-03

   “on April 7, 2025, our 2024 Kia EV6 was towed away from our driveway after an ICCU failure the day before. The tow truck driver attempted to jumpstart it with a battery eliminator and he could not. He could not get it shifted into neutral and had to pull it up on the ramp with the back tires stationary, sliding up the ramp. They had it until we got it back just before April 22, and then on that day, it was towed away again because of a 12 V battery failure. …”

   NHTSA complaint #11716537, filed 2026-02
3. 3
   Vehicle speed control

   Car speeds up on its own

   • 11 complaints (14%)
   • typically at 2.0 yrs old
   • 2 mention a crash, fire or injury
   • filed 2024–2026

   Owners describe the car speeding up without the driver pressing the accelerator, such as on a freeway at steady speed or while pulling into a driveway at low speed. Some say it kept accelerating after the accelerator was released, or accelerated while the brake was applied. A few describe the brake pedal going to the floor without slowing the car, and in a stoplight report the dealer could not confirm the cause. The sample gives no mileage for these reports; the events happened in places such as a parking lot, a driveway, stop-and-go traffic and on a freeway.

   What to check: On a test drive, check that the car slows and holds speed normally after the accelerator is released, and that the brakes respond at low speed in an empty, safe area. Ask the dealer whether any drive-control software update applies to this model year.

   2 excerpts from owner complaints in NHTSA records

   “Brakes failed with unintened acceleration. We were stopped behind a truck at a stoplight when the the vehicle accelerated with a foot on the brake. We had it towed from the scene of the accident to our local dealership for testing. They had the vehicle for 4 weeks. Kia customer care was not responsive to our calls and emails or the dealerships. The dealership could not confirm the cause without their cooperation. The police were called to the scene of the accident and there is a report. …”

   NHTSA complaint #11685781, filed 2025-09

   “When I stopped the car in a parking lot, before I could engage the parking brake, the vehicle suddenly accelerated and climbed over the curb adjacent to the side walk. Stopped for few seconds and again suddently started accelerating. I could not stop the car as the brake appeared to be disenaged completely and was going all the way to the floor. The car went on the side walk, and descended on the road from the side walk and crossed the road, climbed on the curb again and stopped on the grassy area. …”

   NHTSA complaint #11691230, filed 2025-10
4. 4
   Brakes

   Brakes slow to respond or seem to fail

   • 9 complaints (12%)
   • typically at 1.9 yrs old
   • 4 mention a crash, fire or injury
   • filed 2024–2026

   Owners describe pressing the brake without the car slowing as expected. Reports include wet roads with regenerative braking set to a stronger level, where the car did not slow until the pedal was pressed hard and ABS engaged, and a car wash exit where the brake pedal had no effect. Another report describes the brake pedal going to the floor while the car accelerated in a parking lot. According to complaints, the dealer could not confirm the cause of the stoplight report. The sample gives no mileage for these reports, and the situations described were at low speed, such as a red light, a car wash exit or a parking lot.

   What to check: Ask whether the brake system and regenerative braking settings were inspected, and whether the dealer has records of any brake concerns on this vehicle. On a test drive, check brake response at low speed and with regen set at different levels.

   2 excerpts from owner complaints in NHTSA records

   “While driving in the rain, the vehicle failed to decelerate and brake efficiently. There were two event this morning (12/18/24). 1. Approaching a red light with Regen braking set to lvl 3 the car failed to slow after removing my foot from the accelerator. Quickly i began applying braking force with the brake pedal, but there was no change in the vehicles speed. Finally I firmly forced the brake pedal to the floor and the car came to a quick stop with ABS kicking in. …”

   NHTSA complaint #11631339, filed 2024-12

   “When washing my car at an automated car wash my brakes failed when exiting the facility. When the wash was completed it gave me the approval to leave. I tapped on the gas pedal to get the car moving slowly. The car started to move down the ramp and when I applied the brakes there was no response. I pumped the brakes several times but they did not engage. I tried to hit the parking brake and shift into reverse and nothing happened. I finally had no choice but to hit a wall to keep from hitting a vehicle. …”

   NHTSA complaint #11614326, filed 2024-09
5. 5
   Forward collision avoidance

   Automatic braking did not engage or braked unexpectedly

   • 6 complaints (8%)
   • median 20,000 mi at 2.6 yrs old (1 states mileage, few)
   • 4 mention a crash, fire or injury
   • filed 2024–2026

   Owners describe the forward collision system not braking when an impact seemed likely, such as while backing out of a driveway or in bumper-to-bumper traffic, where only a warning sounded. Another complaint describes emergency braking that started without warning, and the owner links it to injuries. The sample gives no mileage for these reports; where speed is described, it was low, such as while backing out or crawling in traffic.

   What to check: Ask the dealer to show how the collision warning and automatic braking settings work and whether any software update applies to them. On a test drive, check the warning and braking at low speed in an empty area, such as when backing out, to see how the car responds.

   2 excerpts from owner complaints in NHTSA records

   “I was backing out of my driveway and backed into a vehicle parked directly behind me. The collision avoidance and emergency braking system should have stopped my car before impact but it did not. No sounds other than the normal backing up beeping. Proximity alert did not ping. The vehicle is available for inspection upon request. The safety feature of collision avoidance and emergency breaking did not work. No, the problem has not been reproduced or confirmed by a dealer or independent service center. …”

   NHTSA complaint #11732922, filed 2026-04

   “Incident took place 1/31/26. I was pulling into my driveway at approximately 5 mph. Normally, as I approach the wooden driveway gate, sensors would begin to beep and I would be prompted to stop.The car normally would stop itself if a collision was imminent. This did not take place. Instead, the car picked up speed, smashed through the gate proceeded up the driveway, smashed through the garage door and the rear wall of the garage. I was alone and uninjured, but the structure was yellow tagged and there was severe damage to the contents. …”

   NHTSA complaint #11716470, filed 2026-02

Buying note. For this model year, ask for service records showing whether the ICCU recall or warranty extension work and any 12-volt battery repairs were completed, and have the charging and 12-volt systems checked before buying. Owners who describe these problems say the symptoms returned in some cases, so a check of the dealer's repair history is worth doing.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.