u/CommercialApple1106

I was driving to work this morning and after turning out to the street from home, the car had like no power. I basically had it floored and it was not going past 1,800 RPM. Put it in park and tired again and still it was just super weak and had to really press the gas just to get up the street to home.

Turned around and parked at home. Had it towed to a Kia dealer near me. When they went to drive it, it was working fine for them. There were no warnings on the dash for me and they couldn’t find any error codes, they did a thorough diagnostic they said. I did get an oil change, engine air filter replacement, and fuel system cleaner 5 days ago at the same dealer but they said they checked everything.

Has anyone had this happen before? It was pretty scary to have the car lose all power and I’m worried it could happen on the highway and leave me stranded. They said they’ve never heard of such an issue with the K5.

Apologies in advance for the long post. I’m simply perplexed by this issue and haven’t been able to get a fix, or even someone to genuinely try and diagnose the issue, despite numerous shop and dealer visits. It’s a brand new car and it’s driving me insane.

I have a 2026 Tucson Hybrid that had no vibration or handling issues before this happened. A large rock fell into the highway in front of me. I tried to avoid it, but the driver rear tire hit the rock and immediately went flat. We later found that the driver rear wheel/rim was bent badly.

I had the car towed to Hyundai and with a straight face they said we’re booked and won’t even be able to take a look at your car for at least 4 weeks. I had it towed to a repair shop and he straightened out the rim and got me on the road.

Immediately, I noted that at exactly 43mph and 55mph the car has a vibration/humming noise that waxes and wanes. You can feel the vibration in the steering wheel. I took the car to AAA for road force balance and they said the driver rear was bent. I spent 1k on a new rim and had it replaced. Got all four wheels road force balanced too and they moved it to the driver front position. Got on the road and the vibration was exactly the same!

After a week or two, I took it to Hyundai dealer farther from home that had appointments. I asked for a diagnostic but the mechanic just came out and said that AAA didn’t balance the wheels right and left multiple sets of weights on them. They said the car looks fine to them and re-balanced everything. Now the wheel is in the passenger front position. The 55mph noise and vibration went away completely but the 43mph remained. However, over the next 1-2k miles, it’s back to how it was before.

Interestingly, the problem is the same despite the wheel being in three different positions. And oddly enough, when it’s a colder day and the tire psi is lower (34psi) it’s suuuper noticeable. As a test, I inflated to 38-39psi and the vibration was much more subtle. There is also maybe some increase in noise when turning to the right on a curve as well.

I’m at a loss. Does anyone have any ideas for what might be wrong?? Is there something specific I should request they evaluate to diagnose the issue?