2024 Kia EV9

We were driving in the middle lane, going straight approximately 25 MPH. The car lurched and almost flipped. We were able to pull over, the wheel was no longer spinning with the car and the tie rod snapped at a weld point. We could have been killed had we been going faster. My son was thankfully not in the car. I am desperately trying to get the car inspected but the dealership will not unless we pay. There were no warnings, but a whining sound began yesterday and we were on the way to the dealership this morning. Now there are warnings. There have been so many safety issues with this car. I will be filing 2 other reports for the seats.

What component or system failed or malfunctioned, and is it available for inspection upon request? Two components failed simultaneously: (1) the rear passenger side tire experienced a catastrophic blowout while traveling at 65 MPH on the highway, and (2) the Tire Pressure Monitoring System (TPMS) failed to detect or warn of any tire pressure abnormality before or after the blowout. Following the blowout, the vehicle’s diagnostics screen displayed “All Systems OK” while the instrument cluster simultaneously showed a “Low Tire Pressure” warning — indicating a TPMS malfunction. The original blown tire has been retained and is available for inspection upon request. All four tires have since been replaced. How was your safety or the safety of others put at risk? A tire blowout at 65 MPH on a highway created an immediate risk, I briefly lost control of the vehicle as it became wobbly and unstable to steer, we were at at risk of collision, or rollover. Two minor children were passengers in the vehicle at the time. The simultaneous TPMS failure provided no advance warning, eliminating any opportunity to safely reduce speed or pull over before the blowout occurred. The vehicle had been in my possession for approximately two-three hours at the time of the incident. Has the problem been reproduced or confirmed by a dealer or independent service center? UNKNOWN Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? UNKNOWN Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warning lamps, messages, or symptoms appeared prior to the tire blowout. The TPMS provided zero advance warning. After the blowout had already occurred and the vehicle was stopped on the roadside, the instrument cluster displayed a “Low Tire Pressure” warning. However, simultaneously, the Vehicle Diagnostics screen displayed “All Systems OK” with a green check-mark.

2024 Kia EV9 has destroyed two complete tire sets in 4 months (October 2025, January 2026) despite two professional alignments (May 2025, October 2025). Dealer service manager admitted on recorded call (1/7/26) seeing multiple EV9s "under 18,000 miles" destroy tires, confirming fleet-wide pattern. Multiple owner forums report the exact same issue. MY CASE: - [XXX] (11,860 mi): Steering misalignment, independent shop (Town Fair Tire) confirmed alignment issue - June 2025 - Vehicle inspected and tires rotated by authorized Kia dealership - Berlin City in Vermont - October 2025 (22,736 mi): Left rear BLOWOUT while driving. ALL FOUR OEM tires (113 load rating - "correct" per Kia) worn to bare threads. Tires had ~18,000 miles on them. October 2025: Snow tires were installed in October 2025, with 10/32" tread (were driven ~4,000 miles the previous winter). Dealer performed alignment, no before/after documentation provided [XXX] (25,486 mi): Same winter tires that drove 4,000 mi perfectly first winter destroyed in 2,700 mi second winter DEFINITIVE PROOF - Multi-Point Inspection (1/5/26): On 1/5/2026: Rear Left: 1/32" tread (destroyed in 2,700 miles from Oct. '25 to Jan. '26) Rear Right: 1/32" tread (destroyed in 2,700 miles from Oct. '25 to Jan. '26) Front Left: 10/32" tread Front Right: 10/32" tread Rear-only catastrophic wear on AWD vehicle is definitive proof of rear suspension or alignment defect. If load rating or overloading were the cause, all four tires would wear equally. SAFETY HAZARDS: Left rear tire BLOWOUT October 2025 while driving at 35 mph. Service Manager Pat (1/7/26): "Under 18,000 miles I've seen" other EV9s destroy tires - CONFIRMS FLEET-WIDE PATTERN Service Manager: "I can't tell you why the alignment is out" - CANNOT DIAGNOSE ROOT CAUSE Service Advisor John (1/6/26): "There's got to be an elephant in the room somewhere" - ADMITS UNDIAGNOSED DEFECT EXISTS Service Advisor: "I wouldn't feel safe putting my guys in it" INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA),

When driving at speeds 60+ mph, EV9 steering wheel and center console vibrate consistently even on newly paved smooth road(s). I have taken it into two different dealerships for resolve twice within the first week of ownership. Both dealerships checked tires, mount and balanced the ones that were off and sent us on our way. The steering wheel and console vibrations persist. I have taken it back in and reported that the issue hasn’t been resolved. They noted it on the service order but did nothing further in an effort to resolve the issue. This is a well known and documented safety issue on NHTSA complaints and several Facebook owner groups for the EV9 across the world.

1. When I go over bumps, the car behaves as if it's about to lose control. It porpoises and at one point it feels like you're about to lose control of the vehicle. 2. We have taken the vehicle to the dealer 3+ times now for the same issue. They claim that it's a glitch in the suspension but there is no know fix. At 55+MPH the vehicle starts vibrating and is completely different than issue number 1 above. They've tried balancing the tires but it has not been Successful. We're hoping to claim the car and Lemon through WI.

When traveling at highway speeds the rear suspension is not capable of handling road imperfections. When a pot hole or other disturbance occurs, the rear end of the vehicle violently porpoises and swing back and forth. This is made even more obvious when taking a long sweeping curves at 55 plus. It causes the entire chassis to become very upset. I have never had a car do this.

Vehicle experiences steering vibration when at highway speeds (above 65mph). I have brought the vehicle in for service four times and the issue still returned after multiple alignments, rotations, and road force balances. The local service techs are working with Kia, but it has currently been in the shop for 24 days with no resolution. According to the service advisor, tires have been inspected and even swapped with new ones but the problem is still present. I am concerned with the safety of the vehicle because it creates issues with control at high speeds which could result in an accident. Even at low speeds, the rear end fishtails over small bumps creating a temporary loss of control. I am unsure if the two are related. I can provide Kia service order numbers and Kia customer care case number upon request. Multiple other owners have experienced the same concerns and have posted a growing number of instances where the vehicle was purchased back by Kia as a result.

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.

3 weeks after picking up our Kia EV9, I noticed a thunking sound from the passenger side front tire. When we reached home, we opened the car cover and noticed that the lug nut had come off and was rattling behind the cover. We called the dealership and the asked us to bring the car in. Since we didn't want to drive it, we bought a torque wrench and tightened it ourselves, after getting the information from the dealership on how much to tighten it. We also noticed that all the lug nuts were under torqued and the driver side lug nut was very loose. I also read multiple reports on online forums (Reddit) about new Kia EV9 wheels flying off on the highway.

I am experiencing significant and persistent vibrations at highway speeds (60–75 mph) in my 2024 Kia EV9. Despite multiple dealership visits and repair attempts, the issue remains unresolved. The vibrations cause noticeable discomfort and potential safety risks, especially on long drives. Timeline of Events & Repairs: 1.First Visit to Kia dealer (Dec 24): The dealership performed a tire balance and determined one tire was defective, replacing it. Vibrations persisted. 2.Second Visit (Jan 25) The dealership replaced the remaining 3 tires 3. ThirdVisit (Feb 25): The dealership identified three wheels with lateral runout and replaced them. They also performed road force balancing, reportedly bringing all values below 16. 4.Test Drive (Feb 25): After picking up my vehicle, I drove on the interstate and found the vibrations had worsened, now starting at 60 mph instead of 70 mph. •A third-party wheel shop inspected the wheels and found the fourth wheel (not replaced by Kia) was defective and out of round. 5.Dealership’s Response: Despite these findings, Kia dealer dismissed my concerns and referred me to another dealership for a second opinion. They also stated that third-party evaluations are not accepted, creating an endless loop where I cannot get the issue properly addressed. Safety Concerns: •Vibrations impact vehicle stability and driver comfort, especially on long trips. •Extended driving with excessive vibrations may lead to fatigue, reduced control, and premature mechanical wear. •The fact that multiple components (wheels, tires) have required replacement raises concerns about a potential manufacturing defect affecting Kia EV9 models. Request for Investigation: The dealership has failed to resolve this issue despite multiple repair attempts, and their refusal to acknowledge third-party findings leaves me with no clear resolution path. I request that NHTSA investigate potential defects in the wheels, tires, or drivetrain system of the Kia EV9.