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.

- Seattle, WA, USA

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.

- Bradenton, FL, USA

Brand New EV9 Land AWD has wheel shake and vibration at 65MPH+. Center console vibrates and shakes substantially. Performed multiple wheel balances without and real change. Multiple other people reporting same issues. Not sure if this is tire, wheel, or driveshaft related. Kia America seems to not be interested in investigating this. This car drives rougher than a heavy class diesel truck.

- Osprey, FL, USA

Brand New EV9 Land AWD has wheel shake and vibration at 65MPH+. Center console vibrates and shakes substantially. Performed multiple wheel balances without and real change. Multiple other people reporting same issues. Not sure if this is tire, wheel, or driveshaft related. Kia America seems to not be interested in investigating this. This car drives rougher than a heavy class diesel truck.

- Osprey, FL, USA

Bought a new EV9 and experienced steering shaking/vibrating heavily on high way speeds. There is always a subtle vibration on speed around 70mph where the cup holders in the middle of front seats vibrates, the driver seat and steering vibrates and creates a unpleasant and disturbing driving experience which can lead to anything worse. There are so many other complains on the similar issue but the manufacturer and/or service agents are not agreeing.

- South Windsor, CT, USA

First the vehicle shakes at highway speeds. It has a substantial steering wheel vibration. I had to get two separate wheel balances done to attempt to resolve the issue. Can-??t really say if the issue is fully resolved now because both the 12v battery and high voltage battery have had issues or failures leading to a completely dead unusable vehicle. Car has been out of working order for 13 days now with no eta on when the issue will be resolved. All of this happened with less than 30 days of owning the vehicle.

- Osprey, FL, USA