Warnings problems of the 2021 Kia Motor Telluride

There rear parking sensors have come up with an error message. After I looked into this it looks like a wide spread problem. The kia dealership said it was the rear bumper harness was faulty. I am just outside of warranty and kia is trying to charge $850 for a problem that they are well aware of and are not addressing. They are also claiming that the oil filter housing is damaged and I have only ever gone to a kia dealership for oil changes. After researching, this also appears to be a widespread issue which they are trying to charge $450 for. These 2 issues are known defects and widely reported and kia should be fixing these items.

My main screen on my 2021 Telluride goes out suddenly, turning off the backup camera and collision warnings. Sometimes when I start the car it never turns on, sometimes it starts to boot and then goes out and sometimes it works for a few seconds/minutes and then turns off. Once and a while it turns on and stays on for days before going on randomly again.

Anytime going through the car wash the front and back parking sensors don’t work and gives an error. It is now permanently stuck with this error.

The front bumper sensor has stopped working. This is preventing proper function of the forward collision warning and the parking collision warning. I took this to be fixed to executive kia of wallinford, CT and they identified corrosion of the component as the cause of the failure. My car has had no accidents or damage to bumper so any corrosion is due to improper sealing of part, or weather proofing of bumper. An online search identified many other kia owners dealing with this same issue. My extended warranty through fidelity inc sent out an inspector to review this and they are refusing to cover the cost of the fix since it is due to "corrosion. " including photos my kia dealer mechanic sent me of the corrosion.