2024 Kia EV9 Brakes Problems

When I started the car up, I noticed a little bit of chattering on the brake pedal, which seemed very unusual. I drove the car forward a little bit and then all of a sudden, all these lights displays and stop vehicle and check brake system now message showed up. The car was very sluggish to drive and had almost no brake pressure. I was able to drive it out of the parking lot (slowly and carefully). When I called a tow truck, I left the vehicle off for about 20 or 30 minutes, and then when I turned it back on, everything was fine no error messages and I had plenty of brake pressure. Post dealership update: They confirmed the issue and DTC code. Found that it was a ground wire that had a 3 ohm resistance (something about a “plastic coating” was mentioned in the paperwork!). They replaced the cable via SC360, and I’ve put about 800 miles on it since then with no issues.

NHTSA ID

11755146

Incident

Aug 5, 2026

I was driving around 60-65 mph on the highway when suddenly a warning alarm went off and the warning light read “stop vehicle and check brake system”. I took my foot off the accelerator and car continued to maintain speed. The power brakes did not work. I put the car into neutral hoping that would slow it down, but it continued to maintain speed. I went into the right lane and put on my hazards. When I had the opportunity to pull into the breakdown lane, I did so and was able to push the brake pedal manually and get the car to stop, and turn it off. When I turned the car back on again, I got the same warnings and alarms. After 5-10 minutes, when I turned the car on, everything seemed to have cleared. I still had the car towed to KIA to investigate the issue.

NHTSA ID

11669841

Incident

Jun 27, 2025

UNKNOWN

NHTSA ID

11641089

Incident

Feb 6, 2025

Parking brake remains engaged when driving after parking Must manually reset parking brake because the brake doesn’t release automatically after - as designed

NHTSA ID

11639989

Incident

Jan 31, 2025

Vehicle was stored in a closed garage prior to operation. I started the vehicle and began to back out of the garage into the driveway. After approximately 3-5 feet of movement backward, several yellow warning icons illuminated on the dashboard and the vehicle's brakes stopped functioning. The vehicle free-rolled several feet down the driveway. After about 1 second, the vehicle brakes engaged, all warning lights went out, and the vehicle began operating normally. I attempted to replicate the fault but was not able to. I feel this is a safety concern because uncontrolled rolling of a 2-ton vehicle could cause a crash or I could have rolled over a small child or a dog on my sidewalk! Ambient temperature 56F with no precipitation and low relative humidity. Garage was at roughly 65F. Vehicle has 3,960 miles on the odometer and was at approximately 40% charge on the main battery. I am currently on hold with Kia to report the issue (20 minutes and counting).

NHTSA ID

11639470

Incident

Jan 29, 2025

The 12-volt battery for the vehicle was depleted, so the vehicle had to be jump-started to run. I work for a repair facility (it was here for collision repairs, as far as I know unrelated to this issue) and since I was unfamiliar with the vehicle, I inadvertently turned it off before shifting into park. When I took my foot off the brake, the vehicle began to roll forward. I am not sure if the vehicle was in park, neutral, or even reverse (the gear I was in when I turned the vehicle off), but whatever gear it was, the vehicle kept rolling after it was turned off. I tried turning the vehicle back on to shift to park, but was unable to do so due to the depleted 12-volt battery. I tried hitting the park button anyway, and this did nothing. I then tried to engage the electronic parking brake, but this was also inoperative due to the lack of power. With each attempt, I tried briefly taking my foot off the brake, but each time it continued to roll forward. I then called my manager and asked him to jump start the vehicle so I could put it in park and engage the parking brake. No damage was done in this incident, nor was anyone hurt, but this lack of fail-safes to prevent the vehicle from moving after a loss of power is a significant design flaw and safety hazard. If I had not noticed the issue in time and gotten out, the vehicle could have rolled away and caused property damage or bodily injury to me or a bystander. To my knowledge, this is the only such incident with this vehicle, and I do not know whether it is specific to this particular vehicle or replicable in others of the same year make and model. There were no warning lights.

NHTSA ID

11639368

Incident

Jan 17, 2025

I brought the vehicle in to have recalls addressed on 12/30/24. Starting the next day we noticed the car was weaving without any steering, but thought it might have been icy road conditions and waited to see if it reoccured. The car has since weaved intermittently, but has righted itself after releasing the accelerator. However, on 1/15/25 while traveling about 50mph, the car started weaving on its own and when the accelerator was released the car started to wildly fishtail. Called dealer and they agreed this was a serious issue and agreed to see car the next morning. Service tech said when they drove the car it did the same thing and that the troubleshooting recommended I change the regenerative braking setting to "smooth" and sent me on my way. I did not get even a mile before the car began weaving rapidly again on its own. Went straight back to dealership where manager wanted me to drive the vehicle again with the tech in car which I refused as it is not safe to drive. So he said if I was ok with it tech would take car out again but if it was just acting how regenerative brakes work, there wasn't much else they could do. When manager returned to talk to me, he said he ended up going with the tech and it did replicate the weaving action two times during that drive. The car is steering on its own weaving wildly left and right and imposes a great danger and no longer feels like a safe vehicle to drive.

NHTSA ID

11636392

Incident

Jan 15, 2025

Dashboard shows a message" Stop vehicle and check brake system", vehicle doesn't pass over the 10 mph. On the KIA access APP I have all this 6 Diagnostic Issues : FR_CMR C28B981, FR_CMR C164286, ADAS_DRV C28B086, ADAS_DRV 28B986, ADAS_DRV C28B881, ADAS_DRV C164286. Dealer was unable to fix the issue, they state that it fix by itself. Also I have a safety Recall SC326

NHTSA ID

11623295

Incident

Oct 29, 2024

The vehicle unexpectedly accelerates in multiple situations, all related to “iDrive” (one pedal driving), either failing to engage, or unexpectedly disengaging. It almost hit something while parking, and it started accelerating into oncoming traffic from a stop sign. I’ve driven the car for 60 miles. I suspect there are other similar scenarios that I haven’t discovered. Steps to reproduce grouped by scenario: 1. Engage iDrive with the left steering wheel paddle. Remove foot from brake. Car does not move. Switch to R then D. Remove foot from brake. Car accelerates. 2. Engage iDrive. Turn off car. Turn it back on. Shift to D. Car accelerates. 3. Press paddle to engage iDrive, and bring vehicle to a stop. Remove foot from pedal. Sometimes it stays stopped. Sometimes it beeps instead of engaging iDrive, then accelerates later. Expected behavior: After engaging one pedal driving with the left steering wheel paddle, the vehicle should never accelerate from a stop unless the gas pedal has been pressed. The driver should have to press the right steering wheel paddle to disengage it. The left paddle should reliably engage one pedal mode.

NHTSA ID

11612143

Incident

Sep 1, 2024