2024 Kia EV9 acceleration problems

Filed Aug 22, 2025 · Acceleration, Electrical · CA

While driving, the vehicle suddenly lost power and could not accelerate normally. The speed dropped and got stuck around 12–25 mph even when pressing the accelerator. This happened multiple times, usually during hot daytime conditions. It created a serious safety risk, and one time another car almost hit me from behind because my vehicle slowed down so suddenly. The dealer has inspected the car several times but said they could not reproduce the problem. Warning messages such as “Power Limited” appeared on the dashboard when the failure occurred. I also recorded multiple videos of the problem when it happened.

Filed Jun 27, 2025 · Acceleration, Brakes · CT

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.

Filed May 12, 2025 · Acceleration, Wheels · IL

What happened? While driving at highway speeds (approximately 60-75 mph), the vehicle exhibits a pronounced up-and-down motion at the rear, commonly referred to as “porpoising.” This motion is especially noticeable when traversing uneven road surfaces or expansion joints. This issue compromises vehicle stability and passenger comfort, posing a potential safety risk during high-speed travel. The problem has been consistently reproducible under similar driving conditions. The vehicle has not yet been inspected by a dealer or independent service center for this specific issue. No warning lights or error messages have appeared on the dashboard in relation to this problem. Component suspected: Rear suspension system (exact cause UNKNOWN). I am willing to have the vehicle inspected upon request.

Filed Dec 30, 2024 · Acceleration, Driver assistance · WA

Vehicles accelerates aggressively to no limit (95+) when adaptive cruise control is set and there is no leading vehicle within following range.

Filed Dec 9, 2024 · Acceleration, Driver assistance · WA

Instrument panel was non-functioning

Filed Nov 12, 2024 · Acceleration, Electrical · MD

I was driving down the highway at approximately 60 mph with approximately 40% charge to the high voltage battery. While moving the car suddenly stopped accelerating and switched to neutral automatically. The instrument panel provided no audible alerts of a problem and in relatively small text stated "check electrical system" The brakes and the rest of the car's electronics worked such as turn signals and warning lights. We were able to coast and pull over to shoulder of highway and stop safely, but losing acceleration in middle of highway suddenly was very scary. Car is currently at dealer awaiting to be diagnosed.

Filed Oct 24, 2024 · Acceleration · AZ

My gauges stopped displaying any information outside of the gear selection. I had no Speedometer, or acess to any of my safety features. This has happened twice and gauges will turn on again on the next drive if sufficient time has passed.

Filed Oct 21, 2024 · Acceleration · TX

Cluster behind the steering wheel was blank, has happen twice within the last 30 days. This is an issue since I had no speedometer and had to use WAZE to guess how fast I was going. It resolved itself after turning off the EV9 for about 45 - 60 mins. First time it happen on Sept 27, 2024, and then it happen again today Oct 21, 2024.

Filed Oct 12, 2024 · Acceleration, Electrical · NC

My wife turned on the car after it had been parked for a few hours and the primary instrument cluster display (that contains critical information such as speed) was blank. There was nothing she could do to reenable it. This seems to be the same issue found by many other EV9 owners here: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 11, 2024 · Acceleration, Driver assistance · CA

I am reporting a critical safety issue with my KIA EV9. The vehicle's information screen, which displays essential driving data such as vehicle speed, cruise control status, advanced driving system indicators, lights, and signals, has malfunctioned. On two separate occasions, the screen went completely black while driving, leaving all critical driving information inaccessible. This malfunction poses a significant risk to my safety and the safety of others, as I was unable to monitor the vehicle’s speed or system status while driving. Availability for Inspection: The malfunctioning component (information screen/system) is available for inspection upon request. Safety Risk: This issue compromised my ability to safely operate the vehicle. Without visibility of the speedometer, driving system indicators, or signal lights, I was unable to monitor crucial driving functions. This increased the risk of speeding unknowingly and reduced my ability to respond to surrounding traffic, creating a dangerous situation on the road. Reproduction of the Problem: The issue has occurred twice. While I have not yet had it reproduced or confirmed by a dealer or service center, I am aware that other KIA EV9 owners have reported the same issue, indicating it is not an isolated case. Inspection by Others: To date, the vehicle has not been inspected by KIA, law enforcement, insurance representatives, or other authorities regard Please find below links to forums and websites where other KIA EV9 shared about this issue. 1- [XXX] - [XXX] - [XXX] - [XXX] Here is the video of the incident. [XXX] Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)