Why is my Kia Sorento's car key not working?

I've tried replacing the battery, but the key still won't work. What could be the issue?

Have you tried reprogramming the key? Sometimes the key needs to be reset after replacing the battery. Check your vehicle's manual for instructions on how to do this.

If reprogramming doesn't work, the issue could be with the key itself. It's possible that the key has become damaged or worn out over time. Consider getting a new key from your dealership.

Another potential issue could be with the key fob. Make sure it's not damaged or malfunctioning. If it is, replacing it may solve the problem.